Your AI accountant for Singapore.
Finn knows Inland Revenue Authority of Singapore (IRAS), Accounting and Corporate Regulatory Authority (ACRA) and the SGD (S$) — and runs your books, files your taxes, and handles the admin nobody owns. A finance hire for founders in Singapore.
Built for Singapore from day one
Free Singapore accounting resources
Verified guides for Singapore founders. No login required.
Glossary
12 Singapore accounting and tax terms explained.
Expenses Guide
What Singapore businesses can and cannot claim, with Inland Revenue Authority of Singapore (IRAS) citations.
Tax Deadlines
Every Singapore filing deadline with penalties, checklists and source links.
Q&A
10 Singapore accounting questions answered with Inland Revenue Authority of Singapore (IRAS) sources.
Key Singapore terms
View full glossaryCorporate Income Tax (Singapore)
Singapore taxes resident companies at a flat rate of 17% on chargeable income. New companies benefit from the Start-Up Tax Exemption (SUTE), and all qualifying companies can access Partial Tax Exemption.
GST (Goods and Services Tax)
Singapore's value-added tax levied at 9% on most supplies of goods and services made by GST-registered businesses. Registration is mandatory once taxable turnover exceeds S$1 million.
CPF (Central Provident Fund)
Singapore's mandatory social security savings scheme for Singapore Citizens and Permanent Residents. Employer contributes 17% and employee contributes 20% for those aged 55 and below, based on ordinary wages up to S$7,400 per month.
ECI (Estimated Chargeable Income)
An estimate of a company's taxable income for a financial year, filed with IRAS within 3 months of the company's financial year-end. A waiver applies if revenue is S$5 million or less AND ECI is zero.
Form C / C-S / C-S Lite
Singapore's annual corporate tax return. Form C is the full return; C-S for companies with revenue up to S$5 million; C-S Lite for revenue up to S$200,000. All due 30 November each Year of Assessment.
ACRA (Accounting and Corporate Regulatory Authority)
Singapore's national regulator for companies, public accountants, and corporate service providers. ACRA maintains the BizFile+ portal for company registration, annual returns, and filings. Every Singapore company receives a UEN on incorporation.
Can I claim it? Singapore expenses
All expensesHome Office Expenses
PartialPartially deductible. There is no flat-rate home office deduction in Singapore. A company can reimburse directors or employees for actual, documented home office costs at arm's length, and those reimbursements are deductible as business expenses.
Staff Salaries and CPF
YesFully deductible. Salaries, wages, bonuses, and employer CPF contributions (17%, capped at S$1,258/month on ordinary wages) are all deductible as business expenses. The Skills Development Levy (SDL) is also deductible.
Professional Fees (Audit, Accounting, Legal)
YesFully deductible where incurred for revenue purposes. Accountancy fees, audit fees, company secretarial fees, and legal fees for ongoing trading operations are all deductible. Legal fees relating to capital transactions (acquisitions, share issues) are not.
Travel and Transport Expenses
PartialBusiness travel is fully deductible. Personal travel embedded in a business trip is not deductible. There is no standard per-km mileage rate in Singapore; actual cost or car rental costs are used.
Motor Vehicle Expenses
PartialRunning costs (fuel, maintenance, road tax, insurance) for S-plate business vehicles are deductible. Capital allowances are not available for Singapore-registered private cars. The COE (Certificate of Entitlement) cost is capital and not deductible.
Entertainment and Business Meals
Yes50% deductible for qualifying entertainment expenses under section 14(2A). Staff entertainment (e.g., annual dinner and dance) is fully deductible. Receipts and a log of who was entertained and the business purpose are essential.
Singapore tax deadlines
All deadlinesEstimated Chargeable Income (ECI) Filing
Companies must file an Estimated Chargeable Income with IRAS within 3 months of their financial year-end. The ECI is a preliminary estimate of the company's taxable income for the financial year. A waiver applies automatically if annual revenue is S$5 million or less AND ECI is zero.
Annual Corporate Tax Return (Form C / C-S / C-S Lite)
The annual corporate income tax return must be filed with IRAS by 30 November of each Year of Assessment. The form type depends on company size and complexity: Form C-S Lite for revenue up to S$200k, C-S for revenue up to S$5m, and Form C for larger or more complex companies.
ACRA Annual Return
All Singapore companies must file an Annual Return with ACRA within 7 months of their financial year-end. The Annual Return confirms the company's registered details (directors, shareholders, share capital, registered address) as of the FYE and must be filed even if there have been no changes.
GST F5 Quarterly Return
GST-registered businesses must file a GST F5 return each calendar quarter, reporting output tax collected and input tax paid. Net GST is payable or reclaimable. The return is due within 1 month of the end of each prescribed accounting period.
Why founders in Singapore pick AccountsOS
Singapore FAQ
Does AccountsOS support businesses in Singapore?
Yes. AccountsOS is fully live in Singapore, with Finn aware of Inland Revenue Authority of Singapore (IRAS), Accounting and Corporate Regulatory Authority (ACRA), SGD (S$) and local entity types (Private Limited Company (Pte Ltd), Sole Proprietorship, Partnership).
What entity types does AccountsOS support in Singapore?
Private Limited Company (Pte Ltd), Sole Proprietorship, Partnership, Limited Liability Partnership (LLP), Limited Partnership (LP), Branch of Foreign Company. Each has its own tax treatment, filing requirements and default settings configured out of the box.
Can Finn file taxes directly with Inland Revenue Authority of Singapore (IRAS)?
Finn always cites Inland Revenue Authority of Singapore (IRAS) sources when it quotes a rate, threshold or deadline, and prepares the figures you need. Direct e-filing integration varies by country — ask Finn in-app for the current filing capability for your entity type.
What currency and date format does AccountsOS use for Singapore?
SGD (S$) throughout, with dates shown as DD/MM/YYYY. No manual conversion needed.
Can I run a Singapore company alongside businesses in other countries?
Yes. One login covers multiple companies across any of AccountsOS's supported countries — switch between them with a click, and Finn loads the correct tax rules, currency and entity settings automatically for each.
Is my country not listed, or do I need a bespoke setup for a large client book?
We build custom country rollouts and tailored practice migrations quickly — see accounts-os.com/custom-rollout.
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