Singapore's headline corporate tax rate is 17 per cent — already one of the most competitive in the world. But the effective rate that most companies actually pay is significantly lower, thanks to a range of exemptions, incentives and allowances. Whether you are incorporating a new company or reviewing the tax position of an existing business, understanding how these schemes work is essential for good financial planning.
The Headline Rate: 17 Per Cent
All companies resident in Singapore pay corporate income tax at a flat rate of 17 per cent on their chargeable income. Chargeable income is calculated as the company's assessable income (revenue minus allowable expenses) less any approved donations and capital allowances. The 17 per cent rate has remained unchanged since YA 2010, providing businesses with long-term certainty and stability.
Singapore does not levy tax on capital gains, which means profits from the disposal of shares, property (in most cases), and other investments are generally not taxable. Additionally, foreign-sourced income is only taxed when it is remitted to Singapore, and even then, various exemptions may apply. This territorial approach to taxation is a key reason why Singapore is such an attractive holding company jurisdiction.
Partial Tax Exemption for All Companies
Every company in Singapore benefits from the partial tax exemption (PTE) scheme. Under this scheme, 75 per cent of the first S$10,000 of chargeable income is exempt from tax, and 50 per cent of the next S$190,000 is exempt. This means companies with chargeable income of S$200,000 or less enjoy an effective exemption of S$102,500.
In dollar terms, a company with S$200,000 of chargeable income pays tax only on S$97,500. At 17 per cent, that works out to S$16,575 — an effective rate of just 8.3 per cent. For smaller companies, the effective rate is even lower. A company earning S$100,000 in chargeable income would pay approximately S$8,075, giving an effective rate of about 8.1 per cent.
The PTE applies automatically. There is no need to apply or meet any qualifying conditions. Every resident company — regardless of size, industry or ownership — benefits from it.
Start-Up Tax Exemption Scheme
New companies can benefit from an even more generous exemption during their first three consecutive YAs. Under the start-up tax exemption (SUTE) scheme, qualifying companies enjoy a 75 per cent exemption on the first S$100,000 of chargeable income and a 50 per cent exemption on the next S$100,000. This gives a maximum exemption of S$125,000 — compared to S$102,500 under the standard PTE.
To qualify for SUTE, the company must be incorporated in Singapore, be a tax resident for the relevant YA, have no more than 20 shareholders throughout the basis period, and at least one shareholder must be an individual holding at least 10 per cent of the issued ordinary shares. Investment holding companies and property development companies are excluded.
A qualifying start-up with S$200,000 of chargeable income would pay tax on only S$75,000, resulting in a tax bill of S$12,750 and an effective rate of 6.4 per cent. This is a substantial benefit for new businesses in their early years of operation.
Corporate Income Tax Rebate
The Singapore government periodically provides CIT rebates as part of its Budget measures. These rebates are applied directly against the tax payable after the partial exemption. For YA 2024, a 50 per cent CIT rebate was granted, capped at S$40,000. For YA 2025, a 50 per cent CIT rebate has been provided, capped at S$40,000 as well. These rebates are particularly valuable for SMEs, as they can eliminate or substantially reduce the final tax payable.
Key Tax Incentives and Schemes
Beyond the exemptions and rebates, Singapore offers a wide array of targeted tax incentives to encourage specific activities:
- Pioneer Certificate Incentive (PC) and Development and Expansion Incentive (DEI): Companies that are pioneers in their field or are expanding significant operations in Singapore may qualify for concessionary tax rates of 5 per cent or 10 per cent on qualifying income, for a period of up to 15 years.
- Research and Development Tax Measures: Businesses can claim 100 per cent tax deduction on qualifying R&D expenditure incurred in Singapore. An additional 50 per cent deduction applies for staff costs and consumables for qualifying R&D projects (up to a combined 250 per cent deduction for certain categories).
- Intellectual Property Development Incentive (IDI): Provides a concessionary tax rate of 5 per cent or 10 per cent on qualifying IP income, encouraging companies to develop and commercialise IP in Singapore.
- Double Tax Deduction for Internationalisation (DTDi): Companies can claim 200 per cent tax deduction on qualifying expenses incurred for overseas market expansion activities, up to S$150,000 per YA without prior approval.
- Productivity and Innovation Credit (PIC) successor schemes: While PIC has ended, various Enterprise Singapore grants and schemes continue to support productivity improvements, and some have tax deduction components.
Foreign-Sourced Income Exemption
Singapore-resident companies can enjoy tax exemption on foreign-sourced income — specifically dividends, branch profits, and service income — when remitted to Singapore, provided certain conditions are met. The income must have been subject to tax in the foreign jurisdiction (the headline rate must be at least 15 per cent), and the exemption must be beneficial to the company. This exemption, combined with Singapore's extensive network of over 90 Avoidance of Double Taxation Agreements, makes the country an ideal base for regional and global operations.
Filing Corporate Tax Returns
Companies must file two returns with IRAS each year. The Estimated Chargeable Income (ECI) must be filed within three months of the end of the financial year. The full corporate tax return (Form C-S or Form C) is due by 30 November of the YA. Small companies with revenue of S$5 million or less and only Singapore-sourced income can file the simplified Form C-S, which requires less supporting documentation.
IRAS is progressively automating the filing process. Companies using IRAS-approved accounting software may be able to file directly from the software, reducing the compliance burden significantly.
Final Thoughts
Singapore's corporate tax system is designed to attract and retain businesses. The combination of a low headline rate, generous partial exemptions, start-up reliefs, and targeted incentives means that many companies pay an effective tax rate in single digits. If you are setting up or running a business in Singapore, make sure you take full advantage of every scheme available to you. A bit of upfront planning can result in substantial tax savings over the life of your company.