All Insights Finance Solution

Bookkeeping for Singapore SMEs: What to Track and How Often

The Singapore SMEs with clean books aren't using better software than everyone else. They've just built a simple monthly habit and stuck to it.

Compliz Insights · Finance Solution · Published 28 September 2026 · Updated 1 October 2026

Every Singapore company is legally required to keep proper accounting records, under both the Companies Act and the Inland Revenue Authority of Singapore (IRAS)'s record-keeping requirements. Beyond the legal minimum, consistent bookkeeping is what makes tax filing, goods and services tax (GST) returns, bank financing and even simple decisions like "can we afford to hire" actually possible to answer with confidence.

What You're Required to Keep

• Source documents. Invoices issued and received, receipts, payment vouchers, bank statements and contracts.
• Accounting records. A general ledger or equivalent showing all business transactions, from which you can prepare a profit and loss statement and balance sheet.
• Retention period. Generally at least five years, though certain records (such as those relevant to an ongoing tax dispute) may need to be kept longer.
• GST-specific records, if registered: tax invoices, credit notes and import permits that support your input and output tax claims.

A Simple Monthly Routine

Most of the bookkeeping problems we see aren't caused by complexity — they're caused by irregularity. A basic monthly cycle covers the essentials:

1. Record all transactions. Every sale, purchase, and expense entered against the correct account category, ideally within days of the transaction rather than in a year-end backlog.
2. Reconcile bank accounts. Match your accounting records against actual bank statements to catch errors, missing entries or unauthorised transactions early.
3. Track accounts receivable and payable. Know what customers owe you and what you owe suppliers, so cash flow problems don't arrive as a surprise.
4. Review against budget. Even a simple month-on-month comparison flags unusual spending or revenue swings while there's still time to act.
5. File source documents systematically. Digital or physical, but organised in a way that a tax agent or auditor could follow without you explaining it verbally.

Cash Basis vs Accrual Basis

Singapore companies are generally expected to use accrual accounting for statutory and tax purposes — recognising revenue and expenses when they're earned or incurred, not just when cash changes hands. This matters for accuracy but also catches out founders coming from a simpler cash-based mental model, particularly around recognising revenue on invoiced-but-unpaid sales.

Choosing an Accounting System

Cloud accounting software (such as Xero or QuickBooks) has become the default for Singapore SMEs over spreadsheets, mainly because it reduces manual entry through bank feeds, keeps a real-time view of your position, and makes it far easier to hand records to a bookkeeper, auditor or tax agent without a manual export process. The right system depends on transaction volume, whether you need multi-currency support, and whether it needs to integrate with payroll or inventory tools you're already using.

When to Bring in Outside Help

Founders often start by doing their own books, which is reasonable at very low transaction volumes. The usual signals that it's time to outsource are: GST registration (which raises the compliance bar), hiring your first employee (which adds payroll interactions with the books), transaction volume that's starting to eat a meaningful chunk of a founder's week, or simply not trusting your own numbers enough to make decisions from them.

Frequently Asked Questions

How long must I keep accounting records in Singapore?

Generally at least five years, though records relevant to an ongoing dispute or tax audit should be kept for longer than the standard minimum.

Can I do my own bookkeeping instead of hiring someone?

Yes, especially at low transaction volumes, but most companies outsource once GST registration, payroll or transaction volume make it a meaningful time cost.

What's the difference between a bookkeeper and an accountant?

A bookkeeper records day-to-day transactions; an accountant typically also prepares financial statements, tax computations and advises on structuring, though the roles overlap at smaller firms.

Do I need separate software for GST-registered businesses?

Not separate software, but your existing accounting system needs to correctly track and report GST on invoices and returns once you're registered.

How often should I reconcile my bank account?

Monthly at minimum. More frequent reconciliation catches errors and fraud earlier and keeps your numbers usable for real-time decisions.