The Importance of Record-Keeping for Self-Employed Persons

If you are self-employed in Singapore, whether you are a commission agent, freelancer, property agent, insurance agent, or run your own sole-proprietorship, keeping accurate business records is an important part of your tax obligations.

Good record-keeping helps you determine your business income and allowable expenses accurately, supports the figures you report to the Inland Revenue Authority of Singapore (IRAS), and makes tax filing easier.

Why Is Record-Keeping Important?

Self-employed persons must report income earned from their trade, business, profession or vocation as business income, rather than salary. This income is reported in the individual’s Income Tax Return (Form B or B1). Depending on the amount of business revenue, you may also need to prepare a 2-line or 4-line statement when filing your return.

For a 2-line statement, you generally report:

• Revenue
• Adjusted Profit/Loss

If your business revenue is more than S$200,000, a 4-line statement is generally required, covering:

• Revenue
• Gross Profit/Loss
• Allowable Business Expenses
• Adjusted Profit/Loss

Keeping proper records throughout the year makes it easier to prepare these figures accurately when you file your tax return.

What Records Should a Self-Employed Person Keep?

IRAS requires self-employed persons to keep full and accurate records and accounts of their business transactions. These records should be supported by invoices, receipts, vouchers and other relevant documents.

Examples include:

• Income records — invoices, receipts, sales records and other documents showing income received or receivable
• Expense records — receipts, invoices, payment vouchers and other documents supporting business expenses
• Accounting records — ledgers, journals, schedules and records showing your income, expenses, assets and liabilities
• Bank records — bank statements and other records supporting business transactions
• Platform or payment records — statements from platforms or payment services used to receive or make business payments

These requirements apply regardless of how the transaction was paid. Business income and expenses received or paid through services such as PayNow, e-commerce platforms, online marketplaces or other electronic payment services should be recorded just as carefully as cash or cheque transactions.

How Long Should I Keep My Records?

Self-employed persons are generally required to retain their accounting records and supporting documents for at least five years. The records should be sufficient to allow your business income and allowable expenses to be readily determined and verified if IRAS requests them.

You do not normally need to submit your business records with your tax return. However, IRAS may request them if it needs to verify your reported income or expense claims.

Failure to keep proper records can result in:

• Business expense claims being disallowed
• IRAS exercising its best judgement to estimate the revenue you earned
• Penalties being imposed

Keep Actual Records, Not Estimates

Your tax return should be based on your actual business income and allowable expenses rather than estimates.

For example, if you incur S$800 in business expenses during the year, you should retain the invoices, receipts or other supporting documents that substantiate the amount and business purpose.

IRAS states that estimates and improper records are not acceptable. Keeping your records up to date throughout the year is therefore much safer than trying to reconstruct your income and expenses just before filing your tax return.

What Business Expenses Can I Claim?

Not every expense incurred by a self-employed person is automatically deductible.

IRAS allows a deduction for expenses that are wholly and exclusively incurred in the production of income and that are revenue rather than capital in nature. Expenses that are personal or private in nature are not deductible. Capital expenditure is dealt with separately, through capital allowances where the asset qualifies.

For example, depending on the circumstances, business-related expenses may include costs such as:

• Office or workspace expenses
• Professional fees
• Business-related advertising and marketing costs
• Business insurance
• Certain business-related communication expenses

The expense should be supported by proper source documents, and you should be able to explain why it was incurred for the business.

If an expense has both business and private elements, only the portion relating to the income-producing activity may generally be deductible.

For more information, see IRAS: Business expenses and deductions.

What If a Receipt Fades or a Supplier Does Not Provide One?

Some receipts, particularly thermal paper receipts, can become difficult to read over time. IRAS suggests retaining photocopies of thermal paper receipts in case the originals fade. Scanning or photographing them works equally well, provided the copy stays readable and can be retrieved throughout the retention period.

Where you pay an individual for services rendered and issue a payment voucher instead of obtaining a receipt, IRAS requires the voucher to record:

• The recipient’s full name, identification number and address
• The date of payment and the nature of the services rendered
• The basis on which the amount paid was arrived at
• Acknowledgement of receipt by the recipient

That last point matters. A payment voucher the recipient has not acknowledged is much weaker evidence of the transaction.

Can I Keep My Records Electronically?

Yes. Business records can be maintained electronically, including using accounting software, and you do not need IRAS approval to do so.

If you use accounting software, spreadsheets or other digital systems, make sure your records remain complete, accurate, accessible and capable of being retrieved when required.

If you change accounting software, do not assume that your old records can simply be discarded. IRAS states that businesses must continue to retain and be able to retrieve accounting transactions recorded in their previous software for the required retention period, together with the relevant supporting documents.

A practical approach is to export and securely retain readable copies of your historical accounting data before closing or migrating from an old system.

A Simple Record-Keeping Routine

Good record-keeping does not have to be complicated. A simple routine can make tax filing much easier:

1. Record income promptly — keep track of every sale, commission, fee or other business receipt.
2. Keep supporting documents — save invoices, receipts and payment records as you incur expenses.
3. Separate business and personal spending where possible — this makes it easier to identify deductible business expenses.
4. Reconcile your records regularly — compare your accounting records with your bank statements and payment-platform records.
5. Keep electronic copies organised — use clear folders, file names and backups so documents can be retrieved easily.
6. Retain records for at least five years — do not dispose of records simply because the tax return has already been filed.

Qualifying small businesses may also be eligible for IRAS’s Simplified Record Keeping requirements, which can reduce the types of records they need to maintain. Check the current IRAS requirements to determine whether your business qualifies.

Practical Takeaway

For self-employed persons, good record-keeping is more than an administrative task. It helps you report your business income accurately, support the expenses you claim, and respond confidently if IRAS asks you to substantiate your tax return.

Keep your records complete, accurate and organised throughout the year rather than trying to reconstruct them at tax-filing time. As a general rule, retain your accounting records and supporting documents for at least five years.

For more information, see IRAS: Keeping proper records and accounts.

Reference

IRAS video: The Importance of Record-Keeping