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Bookkeeping for Singapore Small Businesses: What to Track Monthly
A simple monthly bookkeeping checklist for Singapore SMEs that want clean accounts, fewer tax surprises and better cash-flow visibility.
Many small business owners only look at bookkeeping when a tax deadline is near. By then, missing receipts, mixed personal spending, unpaid invoices, and payroll adjustments can turn a simple task into a cleanup job.
Good bookkeeping is not just for accountants. It gives the owner a monthly view of cash, profit, tax exposure, and whether the business is actually improving. The goal is not to create perfect paperwork. The goal is to keep enough clean records so decisions and filings are easier.
Monthly bookkeeping checklist
Use this table as a recurring month-end checklist. If you do these items every month, year-end accounting becomes much less painful.
Area to track | What to check monthly | Why it matters |
|---|---|---|
Sales invoices | Issued invoices, paid invoices, overdue invoices, credit notes | Shows revenue, debtor risk, and collection problems. |
Supplier bills and receipts | Upload receipts, match bills, tag categories | Supports tax deductions and avoids missing expenses. |
Bank reconciliation | Match bank transactions to invoices, bills, payroll, and transfers | Finds errors, duplicates, and unexplained cash movement. |
Payroll and CPF | Salary, CPF, reimbursements, claims, bonuses, deductions | Prevents wrong payroll records and CPF submission issues. |
GST, if registered | Output tax, input tax, tax codes, disallowed claims | Reduces GST return mistakes. |
Management view | Profit, cash balance, aged debtors, upcoming payments | Helps the owner manage cash flow instead of guessing. |
What records must Singapore companies keep?
IRAS expects businesses to keep proper records and supporting documents. For companies, records are generally kept for at least five years from the relevant year of assessment. These records help support income, expenses, tax filings, and claims if IRAS asks questions later.
- Keep invoices issued to customers.
- Keep supplier invoices, receipts, contracts, and payment proof.
- Keep bank statements and reconciliation records.
- Keep payroll records, CPF records, claims, and staff reimbursements.
- Keep tax computations and schedules used for filing.
Read the official IRAS guidance here: record keeping requirements.
Owner dashboard to review every month
Bookkeeping is more useful when the owner sees a short dashboard, not only a full ledger.
Cash balance and runway
Know how much cash is available after upcoming salary, CPF, rent, tax, supplier bills, loans, and software renewals.
Profit by month
Compare revenue, gross margin, operating expenses, and net profit. Do not rely only on bank balance, because unpaid bills and overdue invoices can hide problems.
Debtors and collections
Age unpaid invoices by 0 to 30 days, 31 to 60 days, and more than 60 days. A profitable business can still run into cash problems if customers pay late.
Common bookkeeping mistakes
- Mixing personal and business expenses: this creates confusion and weakens records.
- Waiting until year-end: missing receipts and unknown transactions become harder to explain.
- Not reconciling bank accounts: errors can stay hidden for months.
- Ignoring payroll details: bonuses, reimbursements, deductions, CPF, and levies need clear records.
- Using broad categories: “miscellaneous” is not helpful when reviewing cost control.
When to get help
You can handle simple bookkeeping yourself if transactions are low and you are disciplined. Get help earlier if you are GST-registered, hiring staff, handling overseas payments, managing inventory, or preparing for grants, loans, investors, or an audit.
If payroll is part of the issue, connect your bookkeeping workflow to our CPF contribution calculator and CPF articles so salary records are easier to review.
Official references
Frequently Asked Questions
How often should a small business do bookkeeping?
Monthly is a practical rhythm for most SMEs. It keeps bank reconciliation, invoices, receipts, payroll and tax records current.
How long should companies keep records in Singapore?
Companies should generally keep proper business records for at least five years from the relevant year of assessment, based on IRAS guidance.
Can I do bookkeeping myself?
Yes, if the business is simple and transaction volume is low. Once you have GST, payroll, inventory, overseas payments or grants, professional support is usually safer.
What is the most important bookkeeping habit?
Reconcile the bank account every month. It helps catch missing receipts, duplicate entries, unexplained transfers and unpaid invoices.
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