Workflow-First ERP Build
Custom ERP Singapore: Bespoke Systems for How Your Team Actually Works
When off-the-shelf ERP software cannot fit your workflow, Digital 9 Labs builds a custom ERP system around your operations: sales, quotations, inventory, projects, finance, approvals, dashboards, and integrations.
Custom enterprise resource planning (ERP) software, built for Singapore SMEs. From $3.5k onwards.
Where Singapore SMEs feel stuck
Most off-the-shelf ERP software is built for someone else's workflow. We design around yours.
Your workflow is too specific
You have pricing rules, approval habits, customer handoffs, and delivery steps that generic ERP modules do not understand.
Your team keeps bypassing software
If staff return to Excel and WhatsApp, the system has failed. Custom ERP should reduce work, not add another admin burden.
Your reports need manual cleanup
A good ERP should produce live operational numbers without days of spreadsheet stitching.
Your vendors cannot move fast
Small changes become tickets, meetings, and invoices. A custom system should evolve with the way you operate.
Your data is split across tools
CRM, accounting, inventory, Google Sheets, forms, and chat history need one reliable operating layer.
Your growth needs control
As more staff touch quotes, orders, claims, and invoices, you need permissions and audit trails before things get messy.
What we build into your ERP
Pick the modules that match how your team actually works. Everything connects to a single source of truth.
Custom CRM
Lead capture, pipeline, follow-ups, customer profiles, sales notes, and owner visibility.
Quotation Engine
Reusable templates, product/service line items, discount controls, PDF output, and approval routing.
Order & Project Tracking
Convert quotes into jobs, tasks, delivery stages, billing milestones, and handover records.
Inventory & Procurement
Stock movement, purchase requests, supplier records, reorder alerts, and warehouse views.
Finance Workflows
Invoices, payments, claims, expenses, GST-ready data, and Xero or accounting-system sync.
Approvals & Audit Logs
Role-based approval rules for spending, discounts, claims, purchasing, and exceptions.
Management Dashboards
Live views of sales, margin, overdue tasks, project status, collections, and team workload.
AI Automations
Document extraction, sales summaries, smart search, report drafting, and workflow recommendations.
API Integrations
Connect your ERP to existing websites, CRMs, payment systems, accounting tools, and internal databases.
How we deliver
Map the real workflow
We document how work moves through your business today and identify the highest-value system to build first.
Build the first operating module
We ship a practical module that your team can use quickly, then improve it based on real usage.
Expand into a full ERP
Once the first workflow is stable, we connect other departments and add dashboards, automation, and AI.
Custom ERP vs Off-the-Shelf ERP
Off-the-shelf ERP
- Lower upfront setup for standard workflows, but limited fit for unique operations.
- Requires the team to change process around the software.
- Custom fields and reports can become expensive or impossible.
- Often includes unused modules that make training harder.
Custom ERP
- Built around your exact business process and terminology.
- Starts with the highest-ROI workflow instead of a full replacement.
- Can connect to the tools you already use.
- Easier to add AI workflows because the data model is designed for your operations.
Build Versus Buy, With Your Numbers
Put your own headcount, seat price and quotes in. The per-seat line is what usually decides it.
Include site, warehouse and part-time staff. Per-seat licences charge for all of them.
The quoted per-seat price, before implementation.
Commonly 50% to 150% of first-year licence.
A focused first module starts from about S$3,500; a departmental system runs into the tens of thousands.
Billed at cost to your own account.
The per-seat line grows with headcount; a build does not.
EDG can support up to 50% of qualifying costs for eligible local SMEs, on reimbursement. Confirm with Enterprise Singapore.
Illustrative only. Substitute your own quoted figures. Implementation, migration and your own team time (8 to 15 hours per module) apply to both routes and are not modelled here.
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Best-Fit Businesses for Custom ERP
Project-based companies
Firms that need quotations, milestones, progress billing, cost tracking, and handover records in one place.
- Budget against actual per job
- Costs posted while the job runs
- Margin known before final account
Trading and distribution
Companies that need inventory, purchasing, sales orders, customer pricing, and supplier control.
- Landed cost including freight and duty
- Multi-location transfers recorded
- Customer-specific price tiers applied
Service teams
Businesses that schedule work, track client requests, assign tasks, and bill based on delivery stages.
- Jobs scheduled against real capacity
- Field capture on a phone
- Billing follows completion automatically
Corporate gifts and custom products
Teams that manage product sourcing, artwork approval, supplier quotes, delivery status, and repeat orders.
- Customisation tracked per order line
- Artwork approval recorded
- Supplier lead time against promise date
Interior design and renovation
Quotation templates, variation orders, project schedules, supplier POs, and client sign-offs.
- Scope priced by room or by phase
- Design fee separated from build cost
- Client sign-off captured per revision
SME groups
Owners managing multiple entities, teams, or business lines that need shared visibility without messy spreadsheets.
- Multiple entities, one reporting view
- Intercompany transactions recorded
- Consolidated numbers without a spreadsheet
A Worked Cost Comparison
Illustrative arithmetic for a 25-person Singapore SME over five years. Substitute your own headcount and rates.
Licensed route year one
25 users at S$150 a month is S$45,000 a year in licence, plus implementation commonly S$25,000 to S$50,000.
- 25 x S$150 x 12 = S$45,000
- Implementation S$25,000 to S$50,000
- Year one commonly S$70,000 to S$95,000
Licensed route years two to five
Another S$180,000 of licence across four years, assuming headcount and price never move.
- 4 x S$45,000 = S$180,000
- Every new hire adds S$1,800 a year
- Customisation reworked at upgrades
Licensed five-year total
Roughly S$225,000 to S$250,000 on these assumptions, for a company that does not grow.
- S$45,000 + S$180,000 licence
- Plus implementation
- Plus upgrade and customisation effort
Custom route
A focused first module from about S$3,500, extending to a departmental system in the tens of thousands as you prove each stage.
- First module from about S$3,500
- Departmental system in the tens of thousands
- Fixed quote after the workflow review
What recurs
Hosting and optional care, quoted by scale rather than by headcount. No per-seat line at all.
- S$0 per user, at 25 seats or 60
- Hosting billed at cost on your accounts
- Further modules optional, not renewals
Where the gap comes from
Almost entirely the per-seat line. That is why the comparison has to be run over five years rather than one.
- 25 seats: S$45,000 a year
- 50 seats: S$90,000 a year
- A build carries no per-head component
How a Custom Build Is Scoped
The part clients ask about most: how a fixed price is arrived at without a six-week discovery bill.
Walk one real workflow
We follow a single job from enquiry to invoice with the people who actually do it, rather than collecting a requirements list.
- One job, end to end
- The people doing it, not their manager
- Two to three hours, not two weeks
Name the handoffs
Most of the cost and most of the pain sits in the gaps between people. Those gaps become the specification.
- Where work waits
- Where data is retyped
- Where nobody owns the next step
Agree the first module
One workflow, solved completely, is worth more than four half-built. We pick the one with the clearest measurable cost.
- Highest hours, clearest owner
- Shippable in four to eight weeks
- Provable before the next commitment
Fix the quote
After the review the number is fixed, with the assumptions written down so a change of scope is visible rather than argued.
- Fixed after the review
- Assumptions listed explicitly
- Change requests priced openly
Build, then extend on evidence
The second module is scoped after the first is in daily use, not before.
- Adoption measured before extending
- Wish list revisited with real data
- Momentum funds the next stage
What we will refuse
If an off-the-shelf product fits, we say so. A build you regret is worse for us than a project we did not take.
- Standard process, standard product
- No case, no build
- Recommendation in writing
Budgeting the Project Properly
Illustrative arithmetic so you can build a board paper rather than react to a quote. Substitute your own figures throughout.
Phase one, the proving module
Budget S$3,500 to S$12,000 for one workflow solved end to end, live in 4 to 8 weeks on a fixed quote.
- S$3,500 entry, fixed after review
- 4 to 8 weeks to live
- One workflow, fully solved
Phase two, the department
Once phase one is in daily use, a departmental build covering 3 to 4 linked workflows typically runs S$25,000 to S$60,000.
- 3 to 4 linked workflows
- S$25,000 to S$60,000 typical
- Scoped from evidence, not a wish list
Phase three, the operation
Sales, stock, finance, approvals and reporting together is a six-figure programme and should run across 12 to 18 months, not one quarter.
- 12 to 18 months, phased
- Each phase funds the next
- No single big-bang go-live
Internal time to reserve
Budget 8 to 15 hours of your own team's time per module for interviews, testing and training. This is the line most plans omit.
- 8 to 15 hours per module
- Spread across 6 to 8 weeks
- Mostly the person who does the work
Running cost after go-live
Hosting for an SME system commonly runs S$50 to S$300 a month billed at cost to your own account, plus optional care quoted by scale.
- S$600 to S$3,600 a year hosting
- Billed to you at cost
- Care optional, quoted by scale
The comparison to run
Against a 20-seat licence at S$120 a month, five years is S$144,000 before implementation. Run both numbers over 5 years before deciding.
- 20 x S$120 x 12 = S$28,800 a year
- S$144,000 over 5 years, licence only
- Compare 5-year totals, not monthly
Grant treatment
EDG can support up to 50% of qualifying costs for eligible local SMEs on a custom build, on reimbursement, and the project must not start before applying. PSG does not cover custom work.
- Up to 50% of qualifying cost
- Reimbursement, not upfront
- Apply before starting
- Confirm with Enterprise Singapore
Common Questions About Custom ERP
The questions that come up in almost every first conversation, answered plainly.
How long before we see something working
A focused first module is live in 4 to 8 weeks. You see working screens with your own data well before that, usually inside the first fortnight.
- Working screens inside 2 weeks
- Live module in 4 to 8 weeks
- Your data, not a demo dataset
What if our process changes after we build
That is the argument for owning the code. Changes are a development task at your priority, not a support ticket in a queue behind other customers.
- Your roadmap, your order
- No waiting on a vendor release
- Any competent developer can extend it
Who maintains it afterwards
We do if you want us to, or your own developer, or another agency. The code and database are yours, which is the point.
- Care quoted by scale, optional
- Handover documentation included
- No lock-in to us
What happens to our existing tools
Usually nothing. We integrate with Xero, HubSpot and whatever else earns its place, and replace only what is genuinely failing you.
- Integrate first, replace later
- Only replace what is failing
- Accounting stays the book of record
How do we know the scope is right
Because it comes from watching one real job end to end, with the people who do it, rather than from a requirements document.
- Scoped from observation
- One workflow, measurable cost
- Fixed quote after the review
What if you tell us not to build
Then we have saved you money and we will say which product to look at instead. That happens, and it is a better outcome than a project you regret.
- Off-the-shelf recommended where it fits
- Recommendation given in writing
- No case, no build
Implementing a Custom ERP: Week by Week
Illustrative sequencing for a first module. Dates slip, but the order rarely should.
Week 1: watch the work
We sit with the people doing the job and follow one real case end to end, recording every handoff and every place data is retyped.
- 2 to 3 hours of observation
- The doer, not the manager
- One real case, start to finish
- Handoffs written down
Week 2: agree scope and fix the quote
Scope comes from what we watched. The quote is fixed and the assumptions are written down so change is visible later.
- Scope from observation
- Fixed quote issued
- Assumptions listed explicitly
- Out-of-scope named
Weeks 3 to 5: build and show weekly
You see working screens with your own data every week rather than a demo at the end.
- Weekly working build
- Your data, not samples
- Feedback folded in weekly
- No big reveal at the end
Week 6: parallel run
The new system and the old process both run for one full cycle, and the outputs are compared rather than trusted.
- One full cycle in parallel
- Outputs compared line by line
- Rollback stays available
- Confidence earned, not assumed
Week 7: train by role
Short sessions per role on their own live records, then a follow-up after the first week of real use.
- 30 to 60 minutes per role
- Their own records
- Follow-up after week one
- Written quick reference
Week 8: go live and measure
Switch over, then measure the thing you said was costing you hours, so the second module is argued from evidence.
- Measure the original pain
- Compare to the baseline
- Decide module two on evidence
- No expansion without adoption
Custom ERP: Glossary of Terms
Plain-English definitions of the terms that appear in every vendor conversation, so nothing is agreed by nodding along.
ERP
Enterprise resource planning: one system holding the records that several departments share, so a customer, job or stock item exists once rather than in five files.
- One record, many departments
- Replaces reconciliation with a shared source
- Scope is a choice, not all-or-nothing
Module
A functional area such as quoting, stock or payroll. A custom build means choosing three or four rather than buying twelve.
- Buy or build only what you use
- Modules share one data model
- Added when the last one is adopted
Master data
The reference records everything else points at: customers, suppliers, products, staff, cost codes.
- Cleaned once, maintained forever
- Duplicates here corrupt every report
- Owned by a named person
Transactional data
The events: quotes, orders, receipts, invoices, payments, timesheets. Volume grows daily; master data does not.
- Grows with trading volume
- Immutable once posted
- Corrections by reversal, not edit
Source of truth
The system everyone agrees to believe when two numbers disagree. Naming it is a management decision, not a technical one.
- Named explicitly, in writing
- Other systems reconcile to it
- Ambiguity here causes most disputes
Integration
A connection letting two systems exchange records automatically instead of by export and import.
- API or scheduled file exchange
- Direction matters: push, pull or both
- Failure handling is the hard part
API
An interface letting software talk to software. If a vendor has none, every future connection is manual.
- Ask before you buy
- REST is the common standard
- Rate limits and auth are the details
Audit trail
The record of who changed what and when. The difference between an explanation and an argument.
- Every change attributed
- Retained, not overwritten
- Required for most audits
Role-based access
Permissions granted by job function rather than by trust, so leavers are offboarded in one action.
- Permission by role, not person
- Sensitive screens hidden
- Revoked centrally
Cost code
The label that puts a cost against the job, department or project it belongs to.
- Applied at purchase, not month end
- Drives job profitability
- Kept short and stable
Committed cost
Money promised but not yet invoiced, usually at purchase order. The figure spreadsheets almost never capture.
- Visible at PO, not at invoice
- Early warning on overruns
- Distinct from actual cost
Reconciliation
Checking two records agree. Most of it exists because data was entered twice.
- Symptom of duplicate entry
- Removed by integration
- Never fully eliminated
Data migration
Moving existing records into the new system, usually the longest and least glamorous task.
- Cleaning is the larger half
- Archive rather than import everything
- Agree a cutoff date
Parallel run
Operating old and new together for one cycle so outputs can be compared before switching.
- One full cycle minimum
- Compare, do not assume
- Rollback stays available
Go-live
The point the new system becomes the record. Best done one module at a time.
- Never on a Friday
- One module, not twelve
- Support present for week one
User acceptance testing
The client testing that the system does what was agreed, using real scenarios rather than a script.
- Real cases, not happy paths
- Done by the people who will use it
- Sign-off before go-live
Change request
Work outside the agreed scope. Named and priced openly so it does not become an argument.
- Written, not verbal
- Priced before it is built
- Scope baseline retained
Technical debt
Shortcuts that make the next change slower. Sometimes worth taking deliberately, never worth taking silently.
- Recorded when taken
- Repaid before it compounds
- Invisible debt is the dangerous kind
Uptime
The share of time the system is available. Ask what it is measured against and who reports it.
- Measured, not promised
- Excludes planned maintenance
- Meaningless without monitoring
Backup and restore
Copies of your data, and the tested ability to bring them back. Only the second one matters.
- Automated and frequent
- Restore actually tested
- Recovery time measured
SSO
Single sign-on: one login across systems, so access is granted and revoked in one place.
- Central control of access
- Faster offboarding
- Fewer shared passwords
Two-factor authentication
A second proof of identity beyond the password. The cheapest security improvement available.
- Enabled for all admin users
- App-based beats SMS
- Recovery codes stored safely
PDPA
Singapore's Personal Data Protection Act, governing how personal data is collected, used and kept.
- Applies to staff and customer data
- Consent and purpose matter
- Breach obligations exist
GST
Goods and services tax, applied per line with the correct category. Errors here are a filing problem.
- Category per product, not per invoice
- Tax invoice timing matters
- Credit notes must reverse cleanly
Peppol
The international network standard behind structured e-invoicing, used by InvoiceNow in Singapore.
- Documents routed, not emailed
- Validated before acceptance
- Each participant has an identifier
CPF
Central Provident Fund: statutory contributions varying by age band and residency status.
- Rates change; confirm with CPF Board
- PR rates step up over two years
- Computed by the payroll run
SDL
Skills Development Levy, payable on top of CPF and computed in the same run.
- Applies alongside CPF
- Part of the payroll computation
- Not an optional extra
EDG
Enterprise Development Grant: supports up to 50% of qualifying costs for eligible local SMEs, on reimbursement.
- Custom builds may qualify
- Apply before the project starts
- Confirm with Enterprise Singapore
PSG
Productivity Solutions Grant, which funds pre-approved packaged solutions rather than custom work.
- Packaged solutions only
- Custom builds do not qualify
- Check the approved list first
SaaS
Software as a service: rented software, priced per user per month, hosted by the vendor.
- Recurring, not one-off
- Cost scales with headcount
- Vendor owns the roadmap
On-premise
Software running on a server you own and maintain, with the costs and control that implies.
- Hardware refresh every 4 to 5 years
- You own patching and backups
- Full control of the data
Total cost of ownership
Licence plus implementation plus migration plus training plus upgrades, over five years rather than one.
- Five years, not monthly
- Include internal time
- The only fair comparison
Vendor lock-in
The cost of leaving. Measured by whether you can export your data and who owns the code.
- Ask about export before buying
- Code ownership in writing
- Proprietary formats are the trap
Scalability
Whether the system copes as volume grows, and what it costs when it does.
- Load versus headcount pricing
- Test at 3x current volume
- Ask what breaks first
Workflow
The sequence of steps and approvals a piece of work passes through, and who owns each.
- Mapped before it is built
- Handoffs are where cost hides
- Encoded once, applied always
Approval threshold
The value above which something needs a second person to agree. Enforced by the system rather than by habit.
- Set by role and by value
- Auditable
- Prevents surprise discounts
Dashboard
A live view of the numbers management asks for, computed from records rather than assembled monthly.
- Live, not monthly
- Same data the team uses
- Few numbers, chosen deliberately
Reporting period
The window a report covers. Agreeing it prevents two people producing different truths.
- Defined and consistent
- Cutoff time stated
- Comparable period on period
Prerendering
Serving fully-formed HTML so crawlers and AI assistants read the content without running JavaScript.
- Content visible without JS
- Faster first paint
- Essential for search visibility
Agentic automation
Software that acts on records rather than only reporting on them, with human approval on anything consequential.
- Acts, not just reports
- Approval gates on money and messages
- Only as good as the data
Custom ERP: The Numbers, Collected
Illustrative Singapore figures gathered in one place. Substitute your own throughout: these size a decision, they do not predict your quote.
Typical first module
S$3,500 to S$12,000, live in 4 to 8 weeks on a fixed quote after the workflow review.
- S$3,500 entry point
- 4 to 8 weeks to live
- Fixed after review
Typical departmental build
S$25,000 to S$60,000 covering 3 to 4 linked workflows once the first module is adopted.
- 3 to 4 workflows
- S$25,000 to S$60,000
- Scoped on evidence
Typical full programme
Six figures across 12 to 18 months, phased so each stage proves itself before the next.
- 12 to 18 months
- Phased, not big bang
- Each stage funds the next
Hosting
S$50 to S$300 a month for an SME system, billed at cost on your own account.
- S$600 to S$3,600 a year
- Billed at cost
- Scales on load, not headcount
Licence comparison
20 seats at S$120 a month is S$28,800 a year, or S$144,000 over five years before implementation.
- 20 x S$120 x 12 = S$28,800
- S$144,000 over 5 years
- Plus implementation
Implementation on a licence
Commonly 50% to 150% of first-year licence. Below 30% usually means scope is excluded.
- 50% to 150% typical
- Below 30% is a warning
- Migration often separate
Data migration
S$3,000 to S$15,000 depending on record count and how clean the data is.
- S$3,000 to S$15,000
- Cleaning is the larger half
- Archive rather than import all
Training
2 to 5 days is typical. Fewer than 2 usually makes adoption your problem.
- 2 to 5 days
- Per role, not per company
- Follow-up after week one
Your internal time
8 to 15 hours per module for interviews, testing and training. The line most plans omit.
- 8 to 15 hours per module
- Across 6 to 8 weeks
- Mostly the person doing the work
Admin hire comparison
A back-office hire in Singapore costs roughly S$3,000 to S$4,500 a month before CPF and overheads.
- S$36,000 to S$54,000 a year
- Plus CPF and overheads
- Plus recruitment and cover
Hours reclaimed
A workflow costing 20 hours a month is about 240 hours a year, or S$7,200 at a loaded S$30 an hour.
- 20 hours a month
- 240 hours a year
- About S$7,200
EDG support
Up to 50% of qualifying costs for eligible local SMEs, on reimbursement, applied for before starting.
- Up to 50%
- Reimbursement basis
- Apply before starting
- Confirm with Enterprise Singapore
Custom ERP: The Buyer's Checklist
Fifteen questions worth asking any vendor, including us, before money changes hands.
Ask for the five-year total
Licence times sixty months plus implementation, migration and training. One number, comparable across vendors.
- 60 months, not one
- All one-off costs included
- Written, not verbal
Ask who owns the code
This single answer determines whether you can ever leave.
- Ownership in writing
- Repository access
- Another developer could take over
Ask about data export
A system you cannot export from is a system you cannot leave.
- Full export on demand
- Readable formats
- Scheduled exports you control
Ask what happens in week one
A vendor who starts with observation is scoping from your problem, not their product.
- Who they interview
- Whether they walk a real job
- What they hand back
Ask what they will refuse to build
A vendor who says yes to everything has not understood the problem.
- Where they recommend off-the-shelf
- What they push back on
- Out of scope on principle
Ask to see it running
Screenshots are not a system. Ask for a populated live environment.
- Live, not slides
- Populated, not empty states
- Someone using it
Ask about the second module
The first is a project; the second tests whether the architecture extends.
- Shared data model
- What clients added later
- How long it took
Ask for the support commitment in hours
Response time in hours, business days defined, escalation path named.
- Hours, not adjectives
- Business days defined
- Named escalation
Ask who maintains statutory logic
CPF, GST and e-invoicing rules change. Someone must own keeping them current.
- Named owner
- In the contract
- Update mechanism stated
Ask about the parallel run
One full cycle with both systems live is what turns confidence into evidence.
- One cycle minimum
- Outputs compared
- Rollback available
Ask what training is included
Two to five days by role, with a follow-up after real use begins.
- Days stated
- Per role
- Follow-up included
Ask how change requests are priced
Scope will change. How that is handled is worth agreeing before it happens.
- Priced openly
- Baseline retained
- Written approval
Ask for a reference you choose
Not the reference they offer. One you pick from their portfolio.
- You pick, not them
- Same size and sector
- Ask what went wrong
Ask what the system will not do
Every system has limits. A vendor who names them is a vendor who understands theirs.
- Named limits
- Workarounds explained
- No magic claims
Ask about hosting and who is billed
Hosting billed at cost to your account avoids a reseller margin you cannot see.
- Billed to you at cost
- Your account, your access
- No hidden margin
Custom ERP: Cost by Company Size
Illustrative Singapore arithmetic at four sizes. Substitute your own headcount and seat price throughout.
Company of 5 to 10 staff
A first module lands at S$3,500 to S$8,000. Licence alternatives at 8 seats and S$120 a month are S$11,520 a year, so the build repays inside 12 months at this size.
- Build: S$3,500 to S$8,000 once
- Licence: 8 x S$120 x 12 = S$11,520 a year
- 5 years licence: S$57,600
- Break-even under 12 months
Company of 10 to 25 staff
A departmental build of S$25,000 to S$40,000 against 20 seats at S$120, which is S$28,800 a year and S$144,000 over five.
- Build: S$25,000 to S$40,000
- Licence: S$28,800 a year
- 5 years licence: S$144,000
- Break-even in 12 to 18 months
Company of 25 to 60 staff
A build of S$40,000 to S$90,000 against 45 seats at S$120, which is S$64,800 a year and S$324,000 over five.
- Build: S$40,000 to S$90,000
- Licence: S$64,800 a year
- 5 years licence: S$324,000
- The per-seat gap widens fastest here
Company above 60 staff
Six-figure programmes on both sides. The deciding factor stops being price and becomes whether your process is your advantage.
- Both routes six figures
- Process specificity decides
- Phase over 12 to 18 months
Adding 10 staff
On a licence at S$120 a seat that is S$14,400 more a year, every year. On a build it is S$0.
- Licence: +S$14,400 a year
- Build: +S$0
- Compounds over five years
Opening a second location
Licences multiply by seats again. A build extends at the cost of the work, not the headcount.
- Licence scales with people
- Build scales with scope
- Second site often needs little new code
The 5-year totals side by side
20 seats: roughly S$144,000 licence-only against S$25,000 to S$60,000 built, before implementation on the licence side.
- Licence S$144,000 over 5 years
- Build S$25,000 to S$60,000
- Plus S$20,000 to S$50,000 implementation on licence
What we would still recommend buying
Accounting. Xero and its peers are cheap, well maintained and statutory-current. We integrate rather than rebuild.
- Keep your accounting system
- Integrate, do not replace
- Book of record stays put
Hosting either way
S$50 to S$300 a month at cost. Not a differentiator, but it should be billed to your account rather than marked up.
- S$600 to S$3,600 a year
- At cost, your account
- No reseller margin
Grant impact on the comparison
EDG at up to 50% of qualifying costs changes the build side materially. It does not apply to packaged licences.
- Up to 50% of qualifying cost
- Reimbursement basis
- Custom builds may qualify
- Confirm with Enterprise Singapore
The number nobody quotes
Your own team's time: 8 to 15 hours per module either way. Include it or the comparison is not honest.
- 8 to 15 hours per module
- Applies to both routes
- Usually your best people
What changes the answer fastest
Headcount growth and how non-standard your process is. Everything else is second order.
- Growth rate first
- Process specificity second
- Everything else is noise
Custom ERP: More Questions We Are Asked
The second tier of questions, usually asked once the first conversation has gone well.
Do we have to replace everything at once
No, and you should not. One module, adopted, beats four half-built. Everything else keeps running.
- One workflow first
- Existing tools stay
- Integrate rather than replace
What if we outgrow it
A build extends at the cost of the work. That is the argument for owning the code rather than renting seats.
- Extended, not replaced
- Your priority order
- No tier upgrade pricing
How do you handle our data
It stays in a database you own, in a region you choose, exportable in full at any time.
- Your database, your region
- Full export on demand
- Access documented and auditable
What if the project stalls
Fixed scope, fixed quote and weekly working builds mean a stall is visible in week three, not month six.
- Weekly working build
- Visible early
- Fixed scope baseline
Can our own developer take it over
Yes. Standard stack, documented handover, and the repository is yours.
- Standard technologies
- Handover documentation
- Repository ownership
What ongoing cost should we budget
Hosting at cost plus optional care quoted by scale. No per-seat component at all.
- Hosting S$600 to S$3,600 a year
- Care optional
- No per-seat fee
How do you price changes after go-live
Openly, against the written scope baseline, with approval before anything is built.
- Priced before built
- Baseline retained
- Written approval
What happens if we stop working with you
You keep the code, the data and the hosting accounts. That is the point of ownership.
- Code and data yours
- Hosting on your accounts
- Another developer can continue
Do you work with our existing accountant
Yes, and we usually ask to. They know where the numbers have to land.
- Accountant involved early
- Statutory treatment confirmed
- Reports built to their format
How do we measure whether it worked
Against the hours you measured before we started. That is why we measure them in week one.
- Baseline measured first
- Same measure after
- Module two argued from it
Custom ERP by Industry in Singapore
Twelve sectors we have built for, and what the system has to get right in each. The modules are the same; the vocabulary and the failure modes are not.
Construction and contracting
BOQ-driven quoting, progress claims with retention, subcontractor certification and site capture. Retention at 5% on a S$1.2m contract is S$60,000 held, half typically released at completion.
- 5% retention on S$1.2m = S$60,000
- Claims roll forward from last certified
- Back-charges netted before payment
- Site capture on a tablet
Dental and medical clinics
Appointments, practitioner rosters, procedure libraries and recall cycles, with patient data handled carefully and kept out of anything it need not touch.
- Chair utilisation visible daily
- Recalls generated, not remembered
- Procedure pricing consistent
- PDPA obligations respected
Interior design and renovation
Quote by scope or by room, cost against budget per project, and a long supplier tail with lead times that drive the site programme.
- Design fee separated from build
- Supplier lead time against programme
- Client sign-off per stage
- Variations priced before work
Trading and distribution
Multi-location stock, tiered customer pricing and purchasing across currencies with landed cost including freight and duty.
- Landed cost, not supplier price
- Price tiers applied automatically
- Transfers between locations recorded
- Backorders visible to sales
F&B and catering
Recipe costing, event orders, delivery scheduling and counter sales, with ingredient batches tracked to expiry.
- Food cost per dish from purchases
- Events separated from counter sales
- Batch tracked to expiry
- Wastage attributed per outlet
Aesthetics, spa and wellness
Prepaid packages drawn down accurately, memberships renewed before lapse, and therapist commission computed from the same sale record.
- Packages drawn down correctly
- Cross-outlet redemption
- Commission from the sale record
- Membership renewal surfaced early
Insurance agencies
Client books, policy renewals, commission reconciliation against insurer statements and advisory records retained for compliance.
- Renewals surfaced weeks ahead
- Commission reconciled to statements
- Advisory records retrievable
- Client book by adviser
Specialty retail
POS tied to the same stock and customer records, with loyalty attached to the customer rather than the receipt.
- Stock truth across outlets
- Loyalty on the customer
- Outlet comparison on one screen
- Variants as real SKUs
Corporate gifting and fulfilment
Stock reserved against confirmed orders, customisation status per line, and supplier lead times against promised delivery dates.
- Reserved on confirmation
- Customisation status per line
- Lead time against promise date
- Sample stock separate
Professional and consulting services
Rate cards by role, time recorded against engagements, and billing that follows delivery rather than memory.
- Rates by role and seniority
- Time against engagement
- Billing follows delivery
- Utilisation visible
Logistics and 3PL
Job scheduling, proof of delivery capture, and billing that reflects what was actually moved.
- POD captured at the door
- Billing from actual movements
- Driver schedule against capacity
- Exceptions surfaced same day
Education and enrichment
Enrolment, class scheduling, attendance and fee collection cycles that repeat every term.
- Enrolment to invoice in one flow
- Attendance recorded, not reconstructed
- Term billing automated
- Capacity per class visible
Custom ERP: Benchmarks Worth Measuring
Illustrative Singapore benchmarks to measure yourself against before and after. Substitute your own figures throughout.
Quote turnaround
Manual assembly commonly takes 30 to 60 minutes per quote. A configured quote is 5 to 10 minutes.
- 30 to 60 minutes manual
- 5 to 10 minutes configured
- 40 quotes a month = 30 hours saved
Invoice handling
Manual invoice handling runs about 2 minutes each. At 300 a month that is 10 hours, or roughly S$4,800 a year.
- 2 minutes per invoice
- 300 a month = 10 hours
- About S$4,800 a year
Payroll cycle
2 to 3 days a month for 30 staff is common, roughly 20 hours or S$7,200 a year at a loaded S$30 an hour.
- 20 hours a month
- 240 hours a year
- About S$7,200
Stock accuracy
Annual-count businesses commonly sit at 85% to 92%. Cycle counting with disciplined receiving reaches 98% or better.
- 85% to 92% typical annually
- 98%+ achievable
- Within one quarter
Stock shrinkage
A 2% variance on S$400,000 of stock is S$8,000 a year written off with no explanation attached.
- 2% on S$400,000 = S$8,000
- Discovered 12 months late
- No trail to investigate
Warehouse picking
Poor slotting adds roughly 30 seconds per pick. At 500 lines a day that is 4 hours daily, or about S$18,000 a year.
- 30 seconds per pick
- 500 lines = 4.2 hours a day
- About S$18,000 a year
Mispick rate
1% on 500 lines a day is 5 errors daily, each carrying redelivery and admin cost plus the customer trust cost.
- 1% = 5 errors a day
- Redelivery plus admin
- Trust cost on top
Implementation time
A focused first module is 4 to 8 weeks. A departmental rollout is 3 to 6 months, phased.
- 4 to 8 weeks first module
- 3 to 6 months departmental
- 12 to 18 months full programme
Adoption
Systems used daily within two weeks of training tend to stick. Beyond a month, adoption rarely recovers without intervention.
- Daily use within 2 weeks
- Beyond a month is a warning
- Measured, not assumed
Training load
2 to 5 days total, delivered as 30 to 60 minute sessions per role rather than one long workshop.
- 2 to 5 days total
- 30 to 60 minutes per role
- Follow-up after week one
Support response
4 business hours is a reasonable commitment for a non-critical issue; 1 hour for anything blocking trading.
- 4 hours non-critical
- 1 hour if trading is blocked
- Escalation path named
Five-year cost, 20 seats
Licence at S$120 a seat is S$144,000 over five years. A departmental build is S$25,000 to S$60,000 once.
- S$144,000 licence over 5 years
- S$25,000 to S$60,000 built
- Before implementation on licence
The Comparison, Run Four Ways
Illustrative arithmetic against the four alternatives you actually have. Substitute your own figures.
Against a per-seat licence
20 seats at S$120 a month is S$28,800 a year and S$144,000 over five, before implementation of S$20,000 to S$50,000.
- S$28,800 a year at 20 seats
- S$144,000 over 5 years
- Plus S$20,000 to S$50,000 implementation
- Plus S$1,440 a year per extra hire
Against staying manual
A workflow costing 20 hours a month is 240 hours and about S$7,200 a year, rising with volume and never repaid.
- 240 hours a year
- About S$7,200
- Grows with volume
- No asset at the end
Against hiring instead
A back-office hire is S$36,000 to S$54,000 a year before CPF, recruitment and cover.
- S$36,000 to S$54,000 a year
- Plus CPF and overheads
- Plus recruitment and cover
- Leaves when they leave
Against a partial build
Half-building three modules costs more than fully building one, and delivers nothing usable.
- One module fully beats three halves
- Adoption needs completeness
- Partial builds get abandoned
The five-year picture
Licence route roughly S$165,000 to S$195,000 at 20 seats. Build route S$25,000 to S$60,000 plus S$600 to S$3,600 a year hosting.
- Licence: S$165,000 to S$195,000
- Build: S$25,000 to S$60,000
- Hosting S$600 to S$3,600 a year
- EDG may cover up to 50% of the build
What tips it either way
Headcount growth and process specificity. At 5 seats and a standard process, buy. At 40 seats and a specific process, build.
- Under 10 seats, usually buy
- Over 25 seats, usually build
- Specificity decides the middle
- We will tell you which you are
Per-User Economics
Illustrative arithmetic reducing both routes to a cost per user per year, which is the fairest single comparison.
Cost per user per year, built
A S$40,000 build across 25 users over 5 years is S$320 per user per year, and it falls as you hire.
- S$40,000 / 25 / 5 = S$320
- Falls with every new hire
- No renewal
Cost per user per year, licensed
S$120 a month is S$1,440 per user per year, and it does not fall.
- S$1,440 per user per year
- Constant, then rises
- Renews forever
The crossover
At 20 seats a build typically repays inside 18 months against a S$120 licence, sooner as headcount grows.
- Under 18 months at 20 seats
- Sooner above 25 seats
- Later below 10 seats
Hours to build the business case
Two to three hours measuring one real workflow gives you a defensible number. That is the whole exercise.
- 2 to 3 hours of measurement
- One workflow, timed honestly
- Loaded hourly cost applied
What a 1% margin recovery is worth
On S$2,000,000 of quoted work, 1% is S$20,000 a year, which exceeds most first-module costs.
- 1% on S$2,000,000 = S$20,000
- Exceeds a first module
- Recurring, not one-off
What a day of downtime costs
If trading stops, the cost is a day of revenue. That is what backup and restore is actually insuring.
- A day of revenue
- Recovery measured in minutes hosted
- 1 to 3 days on-premise
Ten Things People Believe About Custom Software That Are Not True
The objections we hear most, answered plainly.
ERP means replacing everything
It does not, and the version that works never does. One workflow, adopted, then the next one.
- One module first
- Existing tools stay
- Replace only what fails
We are too small for ERP
At 5 to 10 staff a first module from S$3,500 often repays inside 12 months against a S$11,520 annual licence.
- S$3,500 first module
- 8 seats at S$120 = S$11,520 a year
- Repays inside 12 months
Custom means expensive
Custom means scoped. Twelve modules is expensive; two or three that matter is not.
- Scope drives cost
- 2 to 3 workflows typical
- Fixed quote after review
We will lose the vendor expertise
You keep it where it matters. We recommend off-the-shelf accounting and integrate rather than rebuild it.
- Keep Xero or similar
- Integrate, do not replace
- We say when to buy
AI will fix our processes
It will not. Agents act on structured data; messy operations produce confident nonsense.
- Clean operations first
- Then automate
- Then add agents
Implementation always overruns
It overruns when scope comes from a wish list. Scoped from one observed workflow, 4 to 8 weeks holds.
- Scope from observation
- Weekly working builds
- Slippage visible by week three
We cannot afford the disruption
One module, one parallel cycle, one team trained. The disruption budget is 8 to 15 hours of your time.
- 8 to 15 hours per module
- One parallel cycle
- Rollback available
Our staff will not use it
They will if it is faster than what they do now. That is the design constraint, and why we watch them work first.
- Faster than current method
- Interview the sceptic first
- Adoption measured weekly
We will be locked in
You own the code, the data and the hosting accounts. Any competent developer can continue it.
- Repository yours
- Hosting in your name
- Documented handover
Grants make packaged software cheaper
PSG funds packaged solutions and EDG funds custom work at up to 50%. Which is cheaper depends on your five-year total.
- PSG: packaged only
- EDG: up to 50% on custom
- Compare 5-year totals
- Confirm with Enterprise Singapore
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