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Quotation & Invoicing Software

Quotation to GST Invoice, One Linked Chain

The gap between 'quoted' and 'paid' is where margins leak: unversioned quotes, untracked changes, deposits in one file and invoices in another. We build the whole commercial chain as one system, quote, approval, deposit, delivery, GST invoice, credit note, statement.

Custom enterprise resource planning (ERP) software, built for Singapore SMEs. From $3.5k onwards.

DRAFT → SENT1Quotation Builder2Online Acceptance3Deposits & Progressive BillingGST 9%TOTALSigned electronicallyAccepted onlineSynced to accountingQuotation & Invoicing Software

Where Singapore SMEs feel stuck

Most off-the-shelf ERP software is built for someone else's workflow. We design around yours.

Quotes are rebuilt from old ones

Copy-paste quoting spreads yesterday's prices and errors into tomorrow's commitments.

Revisions overwrite history

When the client says 'but you quoted X', there is no version trail to answer with.

Deposits and finals drift apart

What was quoted, what changed, what was deposited and what is still owed live in different documents.

Month-end statements are handmade

Finance rebuilds each client's position from fragments every month.

What we build into your ERP

Pick the modules that match how your team actually works. Everything connects to a single source of truth.

Quotation Builder

Line-item libraries, pricing rules and margins, client-ready PDFs, versioned revisions.

Online Acceptance

Clients accept on a link, acceptance is timestamped and the job is born from the accepted version.

Deposits & Progressive Billing

Milestone billing plans with reminders, part-payments and running balances.

GST Invoicing

IRAS-aligned GST invoices, credit notes and receipts, numbered and audit-ready.

Statements & Aging

Client statements and receivables aging generated, not assembled.

Xero Sync

Invoices and payments sync to Xero or your accounting tool, so the books agree without re-keying.

How we deliver

STEP 1

Map the current flow

We sit with the people doing the work today and document how it really happens, including the workarounds.

STEP 2

Build and ship

A working first version in weeks, wired to your real data, refined with the team using it.

STEP 3

Extend and connect

The module grows into neighbouring workflows or plugs into the rest of your ERP. You own everything we build.

Trusted across Singapore

Brands that trust us

Brands that trust Digital 9 Labs, including IDC, AIA, Great Eastern, Prudential, SingHealth Polyclinics, BNI, MINDEF, National Heritage Board, Twin City Endodontics, Essential Block and Launch Media Labs

Talk to us about quotations & invoicing

Tell us about the workflows you want to improve. We'll respond within 24 hours.

Frequently asked questions

What SME teams usually want to know before they commit to a custom ERP or workflow system.