Every Singapore company, whether a fresh incorporation or a long-established Pte Ltd, must reconcile the same question each year: how much Corporate Income Tax (CIT) is actually payable, and by when. The headline rate has stayed flat at 17% for years, but the exemption schemes, the annual Budget rebate, and the filing calendar shift often enough that relying on last year’s numbers is a genuine risk.
For Year of Assessment (YA) 2026, that risk is sharper than usual. Budget 2026 introduced a Corporate Income Tax Rebate that was subsequently enhanced mid-year, the Estimated Chargeable Income (ECI) and Form C-S/C deadlines remain unforgiving, and directors, not tax agents, carry personal responsibility for accurate and timely filing.
This guide sets out the current rates, exemption schemes, the enhanced CIT Rebate, and the filing deadlines your company needs for YA2026 and the YA2027 planning year ahead, verified directly against the Inland Revenue Authority of Singapore (IRAS).
The Headline Corporate Tax Rate
Singapore’s Corporate Income Tax rate is a flat 17% of chargeable income. There are no progressive bands and the rate applies uniformly to Singapore-incorporated companies, branches of foreign companies, and locally registered business trusts and variable capital companies. What varies is not the rate itself, but how much of a company’s income is exempted before that 17% is applied, and whether a rebate reduces the final tax payable.
Tax Residency Matters
The exemption schemes below generally apply regardless of tax residency, but several concessions (such as certain foreign income exemptions and the lower rebate withholding on outbound payments) do depend on your company being tax resident in Singapore for the relevant YA. A company is Singapore tax resident if the control and management of its business is exercised in Singapore, which usually turns on where board decisions are actually made, not merely where the company is incorporated.
Partial Tax Exemption (PTE): The Default Scheme
All Singapore companies, including companies limited by guarantee, qualify for the Partial Tax Exemption under section 43 of the Income Tax Act 1947, unless they are separately claiming the start-up exemption described below. PTE has applied at the same rates since YA2020:
| Chargeable Income Band | % Exempted | Amount Exempted |
|---|---|---|
| First $10,000 | 75% | $7,500 |
| Next $190,000 | 50% | $95,000 |
The maximum exemption available under PTE for any single YA is $102,500 (i.e. $7,500 plus $95,000), applied against chargeable income taxed at the prevailing 17% rate. There is no application required; IRAS applies PTE automatically when your Form C-S or Form C is processed, provided the company does not claim the start-up exemption instead.
Start-Up Tax Exemption Scheme (SUTE)
New companies get a more generous exemption for their first three consecutive YAs under the Start-Up Tax Exemption scheme, also legislated under section 43 of the Income Tax Act 1947.
| Chargeable Income Band | % Exempted | Amount Exempted |
|---|---|---|
| First $100,000 | 75% | $75,000 |
| Next $100,000 | 50% | $50,000 |
The maximum SUTE exemption for each of the first three YAs is $125,000. From the fourth YA onwards, the company reverts to the ordinary Partial Tax Exemption above.
Who Qualifies for SUTE
A company must meet all of the following to claim SUTE, in addition to not being one of the excluded activities:
- Incorporated in Singapore and tax resident in Singapore for that YA;
- Total share capital beneficially held directly by no more than 20 shareholders throughout the basis period, where either all shareholders are individuals, or at least one individual shareholder holds at least 10% of the issued ordinary shares;
- Not an investment holding company, and not a company undertaking property development for sale, investment, or both (these are excluded from SUTE but remain eligible for PTE).
There is no separate application. The claim is made when filing the ECI and Form C-S/Form C. IRAS treats abuse of the scheme, such as fragmenting a profitable business across shell companies purely to multiply the exemption, seriously, and will disallow claims and impose penalties where this is detected.
For a fuller walkthrough of eligibility edge cases and worked examples, see our dedicated guide to the Start-Up Tax Exemption (SUTE) scheme.
YA2026 Corporate Income Tax Rebate
Budget 2026 originally announced a CIT Rebate of 40% of corporate tax payable for all taxpaying companies (resident or not) for YA2026, capped at $30,000 combined with a $1,500 CIT Rebate Cash Grant for active companies that met the local employee condition. IRAS subsequently confirmed an enhancement: the CIT Rebate for YA2026 has been increased to 50% of tax payable, and the CIT Rebate Cash Grant increased to $2,000, with the combined maximum benefit raised to $40,000 per company.
To be eligible for the Cash Grant portion, a company must be an active company (carrying on a trade or business, including holding investments) and must have made CPF contributions to at least one local employee, excluding shareholder-directors, in calendar year 2025. Active, eligible companies receive the Cash Grant automatically, without application, from the second quarter of 2026. The rebate itself is computed and applied by IRAS when your Form C-S/C is assessed; there is nothing separate to file. For the background on how this figure moved from 40% to 50%, and worked examples of the combined benefit, see our note on the enhanced YA2026 CIT Rebate.
Filing Deadlines: ECI and Form C-S/C
Two separate filings sit on the annual calendar, and confusing them is one of the more common (and costly) mistakes.
| Filing | What It Is | Deadline |
|---|---|---|
| Estimated Chargeable Income (ECI) | An early estimate of taxable profit for the YA, based on unaudited management accounts | Within 3 months of financial year end |
| Form C-S / Form C-S (Lite) / Form C | The final, definitive Corporate Income Tax Return for YA2026 | 30 November 2026 |
All companies must file their YA2026 return by 30 November 2026 via mytax.iras.gov.sg, including dormant companies and those that made a loss in financial year 2025. Directors remain personally responsible for timely and accurate filing even where a tax agent has been engaged, and late or non-filing can attract penalties of up to $5,000, in addition to summons and potential prosecution for persistent defaulters.
ECI filing is waived where both of the following apply: annual revenue for the financial year is $5 million or less, and the ECI for that YA is nil. Filing the ECI is not a substitute for the annual return; IRAS reconciles the two figures once Form C-S/C is filed. Our companion piece on ECI filing for directors covers the waiver conditions and the practical steps for getting the estimate right the first time.
Common Filing Mistakes to Avoid
- Treating ECI as optional paperwork. Even where the waiver conditions are not met, missing the 3-month ECI deadline forfeits any instalment payment plan and can trigger a higher, non-negotiable estimated assessment.
- Claiming both SUTE and PTE in the same YA. A company claims one or the other for a given YA, never both; SUTE simply is the more generous version for a qualifying company’s first three YAs.
- Assuming the CIT Rebate needs a separate application. It does not. It is computed automatically on assessment, but only if the return itself is filed; a late or unfiled return means no rebate is applied at all.
- Overlooking the XBRL filing obligation that sits alongside CIT filing. Many companies must also file financial statements in XBRL format with ACRA; the rules were updated for 2026 and are covered in our guide to BizFinx v4.0 and the updated XBRL filing rules.
- Ignoring related-party transactions when computing chargeable income. Intercompany loans and service fees need arm’s length pricing support; see our explainer on transfer pricing for intercompany loans if your group has cross-border financing arrangements.
Planning Ahead to YA2027
The CIT Rebate is typically a one-off measure announced afresh in each year’s Budget, so companies should not assume the enhanced 50%/$40,000 benefit will automatically repeat for YA2027; watch the Singapore Budget statement (usually delivered in February) for confirmation one way or the other. Our broader coverage of Budget-related corporate measures, including past rebate cycles and grant schemes, is collected in our Budget 2026 corporate impact FAQ.
PTE and SUTE, by contrast, are structural features of the Income Tax Act and are not expected to change annually; the last revision to both took effect from YA2020. Building your tax planning and cash flow forecasts around the structural exemptions, while treating any Budget rebate as a welcome but non-guaranteed bonus, is the more conservative and defensible approach.
Getting Your YA2026 Filing Right
Between the enhanced CIT Rebate, two distinct exemption schemes, and a hard 30 November deadline that carries personal director liability, Singapore’s corporate tax filing season rewards early preparation and penalises last-minute filing. If your company needs help computing chargeable income, confirming SUTE or PTE eligibility, or simply wants a second pair of eyes on this year’s Form C-S before submission, the team at Raffles Corporate Services handles corporate tax computation and filing for Singapore companies of every size, all year round.
The Editorial Team, Raffles Corporate Services