Corporate Income Tax in Singapore: Rates, Exemptions, and Filing (2026 Guide)

Singapore charges corporate income tax at a flat 17% on chargeable income. That headline rate tells you very little about what your company actually pays, because exemptions, rebates, and deductions sit between your accounting profit and your final tax bill. Many small companies end up paying an effective rate in the single digits.

This guide walks through how the system works: what counts as chargeable income, which exemptions apply, how to file with IRAS, when the deadlines fall, and what a realistic tax calculation looks like for an SME. If your company is not registered yet, start with our Singapore company registration guide.

What Is the Corporate Income Tax Rate in Singapore?

The corporate income tax rate in Singapore is 17% of chargeable income. It applies to every company, whether tax resident or not, and whether locally incorporated or a registered branch of a foreign company.

Three features make the regime unusually simple compared with most jurisdictions:

• A single flat rate. There are no brackets, no surcharges, and no municipal layer on top.
• A one-tier system. Tax paid by the company is final. Dividends paid to shareholders are exempt in their hands, as our guide on whether dividends are taxable in Singapore explains.
• No tax on capital gains. Gains of a capital nature fall outside the charge, though gains treated as trading income remain taxable.

Why the Effective Rate Is Lower Than 17%

Very few profitable SMEs pay 17% of their profit. Exemption schemes and the annual rebate compress the real burden. The table below shows the pattern for a company in its fourth year of trading, after start-up exemption has expired.

Illustrative figures based on the partial tax exemption thresholds described below, before any corporate income tax rebate. Your actual position depends on your tax computation.

What Is Chargeable Income for Corporate Tax?

Chargeable income is the figure IRAS actually taxes. It is not your accounting profit. You reach it through a tax computation that adjusts your financial statements for items the Income Tax Act treats differently.

The route runs like this:

1. Net profit before tax from your financial statements.
2. Add back non-deductible expenses such as private motor car costs, fines, and depreciation.
3. Deduct non-taxable income such as capital gains and exempt foreign-sourced income.
4. Claim capital allowances in place of depreciation on qualifying plant and machinery.
5. Deduct approved donations and any losses brought forward, giving assessable income.
6. Apply exemption schemes to arrive at chargeable income, then charge 17%.

What Income Is Taxable?

Singapore taxes on a territorial and remittance basis. Two categories fall within the charge:

• Income accrued in or derived from Singapore, meaning profits from your Singapore trade or business.
• Foreign-sourced income received in Singapore, unless it qualifies for exemption under the conditions covered further down.

Trading profits, service fees, interest, royalties, and rental income are taxable. Capital gains generally are not. Where a payment leaves Singapore to a non-resident, a separate charge can apply, which our guide to withholding tax sets out.

Deductions and Capital Allowances

An expense is deductible when it is wholly and exclusively incurred in producing income, is revenue rather than capital in nature, and is not specifically prohibited. Common deductible items include salaries and CPF, rent, utilities, professional fees, and marketing.

Capital expenditure works differently. You cannot deduct the cost of equipment directly, but you can claim capital allowances on qualifying plant and machinery, spread over the prescribed period or written off in one year for low-value assets. Unabsorbed capital allowances and trade losses can generally be carried forward, subject to the shareholding continuity test.

Basis Period and Year of Assessment

Singapore assesses tax on a preceding-year basis. The basis period is your financial year, and the Year of Assessment is the year in which that income is assessed.

A company with a financial year ending 31 December 2025 is assessed in YA 2026. A company closing its books on 30 June 2025 is also assessed in YA 2026. Your choice of year-end, therefore, shapes your filing calendar, which our guide to the financial year in Singapore explains in detail.

Is Your Company Tax Resident?

A company is tax resident in Singapore when its control and management are exercised here, which usually means that board meetings and strategic decisions happen in Singapore. Incorporation alone does not settle the question.

Residency matters for access to double taxation agreements, the foreign-sourced income exemption, and foreign tax credits. The 17% rate itself applies either way.

What Are the Tax Exemptions Available?

Three mechanisms reduce what a Singapore company pays: the start-up exemption, the partial exemption, and the annual rebate. A fourth exemption covers qualifying foreign income.

Start-Up Tax Exemption Scheme (SUTE)

Qualifying new companies claim this for their first three consecutive Years of Assessment:

To qualify, the company must be incorporated in Singapore, be tax resident for that YA, and have no more than 20 shareholders, of whom at least one individual holds at least 10% of the ordinary shares. Property development companies and investment holding companies are excluded.

Partial Tax Exemption (PTE)

Every company that does not claim SUTE gets partial exemption, including companies past their first three YAs:

Corporate Income Tax Rebate for YA 2026

The rebate applies on top of the exemption schemes and reduces tax payable directly. Read the figures carefully, because the YA 2026 position changed during the year.

Budget 2026 announced a rebate of 40% of tax payable, a CIT Rebate Cash Grant of SGD 1,500 for active companies that employed at least one local employee, and a combined cap of SGD 30,000. In April 2026, the package was enhanced to 50% of tax payable, a cash grant of SGD 2,000, and a combined cap of SGD 40,000. Sources written before the enhancement still quote the lower figures.

• No application is needed. IRAS computes the rebate from your filed return and reflects it in your Notice of Assessment.
• The cash grant is disbursed automatically to qualifying active companies, with shareholder-directors excluded from the local employee test.
• Loss-making companies get no rebate, because there is no tax payable to reduce. The cash grant remains the floor for eligible companies.

Foreign-Sourced Income Exemption

Foreign dividends, foreign branch profits, and foreign service income received in Singapore can be exempt under section 13(8) of the Income Tax Act when three conditions hold: the income was subject to tax in the foreign jurisdiction, that jurisdiction had a headline rate of at least 15%, and the Comptroller is satisfied that the exemption benefits the Singapore resident company.

Where the exemption does not apply, foreign tax credits can relieve double taxation, either unilaterally or under Singapore's extensive network of double taxation agreements.

How to File Corporate Income Tax in Singapore

Corporate tax filing runs on two submissions each year. Both go through the myTax Portal, and both need your Corppass credentials.

Step 1: File Your Estimated Chargeable Income (ECI)

ECI is your estimate of chargeable income for the financial year, filed within three months of your financial year-end. A company closing on 31 December 2025 files by 31 March 2026.

You can skip ECI when your annual revenue is SGD 5 million or less, and your ECI is nil. Filing on time matters beyond compliance: it unlocks instalment payment arrangements, which spread your tax across the year instead of a single demand.

Step 2: Choose the Right Tax Form

To use Form C-S or Form C-S (Lite), a company must be incorporated in Singapore, meet the revenue threshold, derive only income taxable at 17%, and not claim carry-back of losses, group relief, investment allowance, foreign tax credit, or tax deducted at source in that YA.

Step 3: Submit through myTax Portal

E-filing is compulsory. Log in with Singpass or Corppass, authorise the person filing under your entity, complete the form, and submit the tax computation and financial statements where the form requires them.

Our explainer on Corppass covers the access setup that trips up first-time filers.

Step 4: Pay the Tax

IRAS issues a Notice of Assessment once it processes your return. Payment falls due within one month of that notice, even if you have filed an objection. GIRO instalments are available, with the longest plans reserved for companies that filed ECI early.

What Is the Deadline for Corporate Tax Filing?

One date governs the annual return regardless of your financial year-end.

The ACRA filing sits on a different calendar and a different regulator. Our guide to annual return filing covers that side of the compliance year.

What Happens If You File Late

• IRAS may issue an estimated Notice of Assessment based on its own figures, which you must still pay.
• Late filing attracts penalties, and continued non-compliance can lead to summons and court action against directors.
• Late payment triggers an additional charge on the outstanding amount.
• Instalment privileges are withdrawn, so the full sum falls due at once.

Worked Example: What a Singapore SME Actually Pays

Consider a Singapore-incorporated private limited company in its second year of trading, tax resident, with three individual shareholders and one local employee. Its chargeable income before exemptions is SGD 150,000.

On SGD 150,000 of chargeable income, this company pays roughly 2.8%. That gap between the 17% headline and the real outcome is the single most misunderstood feature of Singapore corporate tax.

What Are the Benefits of Singapore's Corporate Tax System?

• A competitive headline rate. 17% sits below the headline rate in most developed economies, and exemptions push the effective rate lower still for smaller companies.
• Territorial taxation. Foreign income is taxed only when received in Singapore, and is often exempt when it was already taxed abroad.
• No capital gains tax. Exits, asset sales, and investment gains of a capital nature stay outside the charge.
• One-tier dividends. Shareholders receive distributions free of further Singapore tax.
• An extensive treaty network. Comprehensive double taxation agreements with more than 90 jurisdictions reduce withholding on cross-border flows.
• Targeted incentives. Schemes such as the Enterprise Innovation Scheme give enhanced deductions on qualifying innovation, training, and IP activity.
• Predictability. Rules change through an annual Budget cycle with published guidance, which makes multi-year planning realistic.

One Caveat for Large Groups: the Global Minimum Tax

Multinational enterprise groups with annual global revenue of at least EUR 750 million now face a minimum effective tax rate of 15% under the OECD Pillar Two framework. Singapore implemented an income inclusion rule and a domestic top-up tax for financial years starting on or after 1 January 2025.

This affects large groups only. An SME or a foreign-owned startup remains squarely in the 17% regime with full access to the exemption schemes.

Common Mistakes That Cost Companies Money

1. Missing the ECI window. Filing late costs you the instalment plan, which turns a manageable payment into a lump sum.
2. Treating accounting profit as chargeable income. Without a tax computation, you either overpay or understate, and risk penalties either way.
3. Forgetting that the return is due even with no profit. Dormant and loss-making companies still file unless IRAS has granted a waiver.
4. Assuming the start-up exemption is automatic forever. It runs for three consecutive YAs and excludes property development and investment holding companies.
5. Poor record keeping. IRAS requires proper records for at least five years, and reconstructing them later costs far more than maintaining them.
6. Confusing ACRA and IRAS deadlines. They are separate filings to separate regulators, each with its own penalty regime.

If GST registration is also on your horizon, our guide to goods and services tax explains the threshold and the filing rhythm.

How Statrys Supports Your Corporate Tax Filing

Statrys Corporate Services Singapore Pte. Ltd. is registered as a Corporate Service Provider with ACRA under the Corporate Service Providers Act 2024. Our accounting team prepares the books, the unaudited financial statements, and the tax computation behind your return, then files with IRAS on your behalf.

• ECI and Form C-S filing handled against your financial year-end, with reminders before each deadline.
• Exemptions and rebates applied correctly, so you claim what your company qualifies for rather than discovering it a year later.
• Transaction-based pricing from SGD 995 a year, which tracks your actual activity. Our breakdown of the cost of accounting services in Singapore shows how that compares.
• Books that stay audit-ready, with transactions flowing from your Statrys business account and exporting to Xero in one click.

We prepare and file. We are not a public accounting entity, so statutory audits sit with a registered public accountant where your company needs one. Questions about your filing position? Talk to our team.

Conclusion

Corporate income tax in Singapore looks simple from the outside: one rate, one annual return, one deadline. The detail sits in the tax computation, where deductions, capital allowances, exemption schemes, and the annual rebate decide what you actually pay.

Get three things right, and the rest follows. Keep clean records through the year, file your ECI within three months of your financial year end, and submit your return by 30 November. A company that does this consistently pays an effective rate far below 17% and avoids the penalties that come with missed deadlines.