Singapore Corporate Tax Guide 2026: 17% Rate, Startup Exemptions & ECI
Singapore's headline corporate tax rate of 17%, single-tier territorial framework, generous startup exemptions, and extensive international network of tax treaties make it a preferred headquarters location for multinational corporations and high-growth startups alike.
1. Singapore Corporate Tax Overview
Administered by the IRAS, corporate income tax applies to all income accruing in or derived from Singapore, or foreign income remitted into Singapore. However, due to partial tax exemptions, effective corporate tax rates for companies with taxable profits up to S$200,000 often fall below 8% to 10%.
2. Startup Tax Exemption (SOTE) Scheme
To support entrepreneurship, qualifying new Singapore private limited companies enjoy the Startup Tax Exemption Scheme during their first three consecutive Years of Assessment (YA):
| Chargeable Income Tier (SGD) | Exemption Rate | Exempt Amount | Taxable Amount | Tax Payable @ 17% |
|---|---|---|---|---|
| First S$100,000 | 75% | S$75,000 | S$25,000 | S$4,250 |
| Next S$100,000 | 50% | S$50,000 | S$50,000 | S$8,500 |
| Total S$200,000 Income | — | S$125,000 Exempt | S$75,000 Taxable | S$12,750 (Effective ~6.38%) |
3. Partial Tax Exemption (PTE) for All Companies
From their 4th Year of Assessment onward (and for companies that do not qualify for SOTE), all Singapore companies enjoy the standard Partial Tax Exemption (PTE):
- 75% exemption on the first S$10,000 of chargeable income; and
- 50% exemption on the next S$190,000 of chargeable income.
This results in a total tax exemption of S$102,500 on the first S$200,000 of chargeable income, giving an effective tax rate of just 8.29%.
4. Corporate Income Tax (CIT) Rebates
The Singapore Budget regularly introduces Corporate Income Tax (CIT) Rebates (e.g., a 50% rebate capped at S$40,000 with cash components for qualifying companies with local employees).
5. ECI & Form C-S / Form C Filing Deadlines
Singapore companies must comply with two annual corporate tax filing requirements:
- Estimated Chargeable Income (ECI): Must be e-filed within 3 months of the financial year end. Companies with annual revenue under S$5 million and nil ECI are exempt.
- Form C-S / Form C-S (Lite) / Form C: Annual corporate tax return due by November 30. Small companies with annual revenue up to S$5 million file the simplified Form C-S.
6. Single-Tier Corporate Dividend System
Under Singapore's single-tier corporate tax framework, tax paid by a company on its profits is final. Dividends distributed to corporate or individual shareholders are completely exempt from taxation. For full foreign income tax treatment, see our guide on Foreign Income & Capital Gains Tax in Singapore.
7. Frequently Asked Questions
What is the corporate tax rate in Singapore?
The flat corporate tax rate is 17%. Partial tax exemptions lower the effective rate significantly for profits up to S$200,000.
How does the Startup Tax Exemption (SOTE) work?
New startups get 75% exemption on the first S$100,000 and 50% on the next S$100,000 of chargeable income for their first 3 Assessment Years.