Singapore Corporate Income Tax Calculator YA2026 — IRAS 17% Flat Rate, Startup Tax Exemption STES, Partial Tax Exemption PTE, 40% YA2026 Rebate Capped S$40,000 & Effective Tax Rate

Singapore’s corporate income tax rate is a flat 17% on all chargeable income for Year of Assessment (YA) 2026. This flat rate applies to all Singapore-incorporated companies regardless of income level — there are no progressive brackets. However, through tax exemption schemes (STES for startups and PTE for established companies) and the YA2026 Corporate Tax Rebate, the effective rate is significantly lower. Singapore’s 17% rate is among the lowest in Asia, making it one of the most competitive corporate tax regimes globally. For comparison: Hong Kong = 16.5%, Malaysia = 24%, Indonesia = 22%, Thailand = 20%.

The YA2026 Corporate Tax Rebate is a government tax relief measure announced for Year of Assessment 2026. Companies receive a 40% rebate on their corporate income tax payable (after deducting the STES or PTE exemptions), capped at a maximum of S$40,000 per company. The rebate is automatically applied by IRAS when processing your tax return — no separate application is required. It is available to all Singapore tax-resident companies regardless of industry or size. The cap means large companies (gross tax above S$100,000) receive a fixed S$40,000 saving, while smaller companies receive 40% of their actual tax liability.

The Startup Tax Exemption Scheme (STES) allows qualifying new Singapore companies to receive generous tax exemptions in their first three Years of Assessment: 75% exemption on the first S$100,000 of chargeable income (saving S$12,750) and 50% exemption on the next S$100,000 (saving S$8,500). Maximum STES savings: S$21,250 in gross tax per YA (before the YA2026 rebate). To qualify: the company must be Singapore-incorporated, a Singapore tax resident, have no more than 20 shareholders (all individuals or at least one holding 10%+ shares), and must not be a property investment or IP licensing company. STES automatically expires after the third YA; the company then falls under PTE.

The Partial Tax Exemption (PTE) applies to all Singapore-incorporated companies that do not qualify for STES (either because they are beyond their first 3 YAs, or because they don’t meet STES criteria). PTE provides: 75% exemption on the first S$10,000 of chargeable income (saving S$1,275) and 50% exemption on the next S$190,000 (saving S$16,150). Maximum PTE savings: S$17,425 in gross tax per YA. Compared to STES, PTE provides smaller savings but is available to a much broader range of companies permanently (not limited to 3 years). Investment holding companies were excluded from PTE from YA2020 onwards.

Key differences: STES offers much larger exemptions (S$125,000 exempt on S$200k income) vs PTE (S$102,500 exempt on S$200k income). STES is only available for the first 3 YAs for new companies with specific shareholder structure requirements. PTE is permanent and available to most Singapore companies. Tax savings: For a company with S$200k income: STES saves S$21,250 in gross tax vs PTE saves S$17,425. After the YA2026 rebate, the difference narrows. Startups with S$200k income pay about S$7,650 net tax under STES vs S$9,638 under PTE — a saving of about S$1,988 per year. Use this calculator to model the exact difference for your income level.

Chargeable income = Statutory income − Approved donations − Losses carried forward from prior years. Statutory income = Revenue/sales − All allowable business deductions (salaries, rent, professional fees, marketing, interest on business loans, etc.) + Capital allowances (depreciation on qualifying assets). Key deductions: employee salaries and CPF contributions; office rent and utilities; professional and legal fees; marketing and advertising; interest on loans for income-producing purposes; capital allowances on qualifying equipment (computers, machinery, vehicles used for business). IRAS provides detailed guidance on Form C-S (for qualifying smaller companies) or Form C (larger companies). Engage a Singapore tax agent if your deductions are complex.

Yes. The STES and the YA2026 Corporate Tax Rebate stack — meaning qualifying startup companies get both the STES income exemptions AND the 40% YA2026 rebate on the remaining gross tax. This makes the effective tax rate for qualifying startups extremely low. Example: S$200,000 income → STES reduces taxable to S$75,000 → gross tax S$12,750 → YA2026 rebate 40% = S$5,100 → net tax S$7,650 → effective rate 3.83%. Similarly, PTE companies also stack with the YA2026 rebate. The rebate applies to net tax payable after exemptions, so both schemes benefit from it simultaneously.

Companies excluded from STES: (1) Investment holding companies — companies whose principal activity is holding investments for long-term capital appreciation or dividend income; (2) Companies developing or licensing intellectual property rights as their principal activity; (3) Companies with more than 20 shareholders at any time during the basis period; (4) Companies where no individual shareholder holds at least 10% of issued shares (i.e., all shares are held by corporate entities). Additionally, STES is not available from YA4 onwards — all companies revert to PTE after the first three YAs.

The Startup Tax Exemption Scheme (STES) is available for a qualifying company’s first three Years of Assessment (YAs) after incorporation. YA typically aligns with the financial year end. A company incorporated in January 2023 with a December financial year end would have YA2023, YA2024, and YA2025 covered by STES. YA2026 would be the fourth YA (PTE applies). You cannot extend or carry forward unused STES years — if you don’t earn chargeable income in the first 3 YAs, those years of STES are forfeited. Plan your business to generate income within the STES window to maximise the benefit.

Effective corporate tax rates for startups using STES in YA2026 (after YA2026 rebate): S$100,000 income → 75% exempt → gross tax S$4,250 → rebate S$1,700 → net S$2,550 → effective rate 2.55%. S$200,000 income → S$125k exempt → gross S$12,750 → rebate S$5,100 → net S$7,650 → effective rate 3.83%. S$500,000 income → S$125k exempt → gross S$63,750 → rebate S$25,500 → net S$38,250 → effective rate 7.65%. S$1,000,000 income → S$125k exempt → gross S$148,750 → rebate S$40,000 (capped) → net S$108,750 → effective rate 10.88%. Singapore’s startup tax regime is designed to maximise take-home profit during the critical early growth years.

For YA2026 corporate income tax in Singapore: Estimated Chargeable Income (ECI): Must be filed within 3 months of the end of your company’s financial year via IRAS myTax Portal. For companies with financial year ending December 2025, ECI is due by 31 March 2026. Form C-S (for companies with annual revenue below S$5 million): Due 30 November 2026. Form C-S Lite (for qualifying companies with straightforward tax matters): Also due 30 November 2026. Form C (for larger companies): Due 30 November 2026. Late filing attracts penalties. Engage a Singapore tax agent early to ensure timely filing, especially if your accounts have complex adjustments or capital allowance claims.

Yes. Singapore has a 9% Goods and Services Tax (GST) which is separate from corporate income tax. GST is a consumption tax charged on taxable supplies of goods and services. Companies must register for GST when their taxable turnover exceeds S$1 million in any 12-month period (or is expected to exceed this). Registered companies collect 9% GST from customers and remit it to IRAS quarterly, but can also claim back GST paid on business inputs. Corporate income tax and GST are separate: CIT is on company profits; GST is on transactions. Small companies below the S$1M threshold may register voluntarily for GST if they make significant taxable purchases.

Singapore vs regional corporate tax rates (2026 indicative): Singapore 17% (+ rebates, effective much lower for SMEs). Hong Kong 16.5% (2-tier: 8.25% on first HK$2M, 16.5% above). Malaysia 24% (SMEs 15% on first RM600k). Indonesia 22%. Thailand 20%. China 25% (15% for High-Tech enterprises). Vietnam 20% (10% for qualifying enterprises). Japan 23.2% (local taxes bring effective to ~33%). While Singapore’s headline rate is similar to Hong Kong, Singapore’s startup tax exemption, zero capital gains tax, zero dividend tax, and extensive double tax treaty network (90+ countries) make it structurally more attractive for most businesses. Singapore also has no withholding tax on dividends paid to shareholders.

Key allowable deductions under Singapore’s Income Tax Act: Staff costs (salaries, bonuses, CPF employer contributions, staff training); Office expenses (rent, utilities, stationery, phone); Marketing and advertising; Professional fees (accounting, legal, audit); Interest on business loans; Depreciation via Capital Allowances (computers, furniture, equipment, vehicles used for business). Special enhanced deductions: R&D expenses (up to 250%); IP licensing and registration (enhanced under EIS to 400%); Qualifying IP acquisition costs; Mergers and acquisitions allowances; Renovation costs (up to S$300,000 cap over 3 years). Non-deductible: private entertainment; penalties and fines; capital expenditure not covered by capital allowances; personal expenses.

Singapore companies file corporate income tax returns using IRAS forms via myTax Portal: Form C-S Lite: For companies with revenue below S$200,000, straightforward tax returns with no complex adjustments. Shortest form. Form C-S: For companies with annual revenue below S$5,000,000 and no complex tax issues. Simplified version of Form C. Form C: For all other companies — larger businesses, companies claiming capital allowances from prior YAs, companies with intercompany transactions, or any complex tax matters. The type of form your company must file is assessed based on revenue and complexity. Smaller companies typically use Form C-S Lite or Form C-S, which are faster to complete and have fewer disclosure requirements.

IRAS penalties for late corporate tax filing in Singapore: Late ECI filing: IRAS may compulsorily estimate the company’s income and issue a tax assessment. The estimated assessment is typically higher than actual income. Late Form C/C-S/C-S Lite: IRAS issues a fine of up to S$1,000 for first-time late filing, escalating for repeat offences. Non-compliance summons: IRAS can summon company directors to court. Court conviction: Fines of up to S$5,000 and/or imprisonment for serious non-compliance. Interest on unpaid taxes: 5% per annum on the outstanding tax amount. Avoid penalties by filing ECI within 3 months of financial year end and the annual return by 30 November 2026. IRAS generally grants an extension of time (EOT) if requested before the deadline with valid reasons.