Singapore's corporate tax rate is quoted constantly as 17%, and the figure is correct. It is also close to irrelevant for the companies most likely to be reading this. Two exemption schemes and an annually-set rebate sit between the rate and the bill, and for a small profitable company they compound into an effective rate in the low single digits. This guide sets out the headline rate, the exemption arithmetic worked through with real numbers, the rebate that changes every year, and the two filing deadlines and one registration threshold that actually generate the compliance work.
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The headline: one flat rate, no bands
Singapore charges corporate income tax at a flat 17% on chargeable income. There are no progressive bands, no separate small-company rate and no surcharge for larger profits. A company earning S$50,000 and a company earning S$50 million face the same percentage.
That flatness is why the headline number travels so well and why it misleads. In a banded system the rate tells you roughly what a small company pays. In Singapore's system the rate tells you almost nothing until you know how much of the income is chargeable, and the exemption schemes are what determine that.
Note also that the rate applies to normal chargeable income — income to be taxed at the prevailing rate. Income taxed at a concessionary rate under an incentive scheme sits outside this arithmetic entirely.
The start-up exemption, worked through
A qualifying new company gets a substantial exemption for its first three Years of Assessment:
- 75% of the first S$100,000 of normal chargeable income is exempt — S$75,000
- a further 50% of the next S$100,000 is exempt — S$50,000
That is a maximum exemption of S$125,000 per Year of Assessment. It is worth being precise about the shape: the exemption is not a threshold below which you pay nothing, and it is not a lower rate. It removes a portion of income before the flat 17% is applied to what remains.
Work an example. A new company with S$200,000 of normal chargeable income:
- Exempt: S$75,000 + S$50,000 = S$125,000
- Chargeable after exemption: S$75,000
- Tax at 17%: S$12,750
Before any rebate, that is an effective rate of about 6.4% on the full S$200,000, against a headline of 17%. The gap between those two numbers is the entire reason the headline rate is a poor planning input.
The scheme was more generous before. For Years of Assessment up to 2019 it was full exemption on the first S$100,000 and 50% on the next S$200,000, a maximum of S$200,000 exempt. That changed with effect from YA2020, so guidance written before then overstates the benefit — check the date on anything quoting S$200,000.
After year three: partial tax exemption
The start-up scheme applies only to the first three Years of Assessment. From the fourth onwards a company moves onto the partial tax exemption, which is available to companies generally:
- 75% of the first S$10,000 of normal chargeable income — S$7,500
- 50% of the next S$190,000 — S$95,000
Maximum exemption: S$102,500 per Year of Assessment.
The step down is real but smaller than founders expect — S$125,000 to S$102,500. What changes more is the shape: the start-up scheme concentrates its relief in the first S$100,000, which suits a company just becoming profitable, while the partial exemption spreads thinner relief across a wider band.
The rebate that changes every year
On top of the exemptions sits the Corporate Income Tax Rebate, which is set annually in the Budget rather than being a permanent feature. For Year of Assessment 2026 it is 50% of tax payable, capped at S$40,000, less a CIT Rebate Cash Grant of S$2,000 where that applies.
The ordering matters. The exemptions reduce chargeable income; the rebate reduces tax payable after that. So they compound. Returning to the S$200,000 example:
- Tax after exemption: S$12,750
- Less CIT Rebate at 50%: S$6,375
- Effective rate on S$200,000: roughly 3.2%
That is the number a small Singapore company actually experiences, and it is a fifth of the quoted rate. Because the rebate is set annually, do not build a multi-year model on it — it has ranged from 20% to 50% with varying caps across recent years and it can be absent altogether.
The rate is simple. The filings are the work.
Two tax deadlines, an annual return to ACRA, and a GST threshold to monitor — all of it due whether or not the company traded. Sleek bundles incorporation with bookkeeping, the tax computation and the filings, which is the practical way to run a Singapore company from outside it. Soveraine readers go through our partner link, and you fund independent editorial in the process.
The filing calendar
Low tax does not mean low compliance, and this is where the real cost of a Singapore company sits. There are two corporate income tax filings and they are separate obligations.
Estimated Chargeable Income is generally due within three months of your financial year end, unless your company qualifies for the ECI filing waiver or is not required to file it. It is an estimate submitted early, not a substitute for the return.
The annual return — Form C-S, Form C-S (Lite) or Form C depending on the company's size and circumstances — is due by 30 November. IRAS is explicit that this is due even if the company had no business activity or made a loss during the financial year. A dormant company still files.
Alongside those sits the ACRA annual return, a separate filing to a separate authority, at S$60. Incorporation itself costs S$15 for the name application and S$300 to register the entity — S$315 in total, as covered in our guide to Singapore company registration.
The GST threshold to watch
Singapore's Goods and Services Tax is charged at 9% on standard-rated supplies made on or after 1 January 2024. Registration becomes compulsory when taxable turnover exceeds S$1 million, and IRAS tests that two ways.
Retrospective view. If your taxable turnover for the calendar year, 1 January to 31 December, exceeded S$1 million, you apply for registration between 1 and 30 January of the following year and are registered from 1 March.
Prospective view. If you reasonably expect turnover to exceed S$1 million in the next 12 months, you apply within 30 days of forming that expectation. A grace period announced in February 2025 means that where liability under the prospective basis arises on or after 1 July 2025, registration takes effect two months from the date of the forecast, giving businesses time to start charging GST.
The prospective test is the one that catches growing companies, because the trigger is a reasonable expectation rather than a completed year. Signing a contract that will clearly take you past S$1 million starts a 30-day clock.
What this means for a foreign founder
The tax position is genuinely good and it is not the hard part. A new company earning S$200,000 pays roughly S$6,375 at YA2026 rates — the sort of number that makes Singapore attractive on paper.
The hard part is that the company must be properly constituted and continuously compliant to be worth having. It needs a director ordinarily resident in Singapore, a company secretary appointed within six months who cannot be the sole director, a registered address, ECI and Form C-S filed on time, an ACRA annual return, and GST monitored as it grows. None of that is optional and none of it pauses because the company was quiet.
Price the structure on the compliance, then enjoy the rate. Founders who do it the other way round tend to discover the running cost in year two.
Sources
- IRAS — Corporate Income Tax Rate, Rebates and Tax Exemption Schemes: https://www.iras.gov.sg/taxes/corporate-income-tax/basics-of-corporate-income-tax/corporate-income-tax-rate-rebates-and-tax-exemption-schemes
- IRAS — Basic Guide to Corporate Income Tax for Companies: https://www.iras.gov.sg/taxes/corporate-income-tax/basics-of-corporate-income-tax/basic-guide-to-corporate-income-tax-for-companies
- IRAS — Estimated Chargeable Income (ECI) Filing: https://www.iras.gov.sg/taxes/corporate-income-tax/estimated-chargeable-income-(eci)-filing
- IRAS — Overview of Form C-S/ Form C-S (Lite)/ Form C: https://www.iras.gov.sg/taxes/corporate-income-tax/form-c-s-form-c-s-(lite)-form-c-filing/overview-of-form-c-s-form-c-s-(lite)-form-c
- IRAS — Do I need to register for GST: https://www.iras.gov.sg/taxes/goods-services-tax-(gst)/gst-registration-deregistration/do-i-need-to-register-for-gst
- IRAS — Overview of GST Rate Change: https://www.iras.gov.sg/taxes/goods-services-tax-(gst)/gst-rate-change/gst-rate-change-for-business/overview-of-gst-rate-change
- ACRA — Service and transaction fees: Companies: https://www.acra.gov.sg/manage/companies/service-transaction-fees/