Company Tax in Singapore: 2026 Rates, Exemptions, Filing Deadlines and a Worked Example

How much company tax will your Singapore business actually pay in 2026? For most companies the answer sits well below the 17% headline rate once exemptions and this year's rebate apply.

In this blog, we discuss the core company tax topics for YA 2026:

• the 2026 Singapore corporate tax rate
• the start-up and partial exemption schemes
• every filing deadline for Year of Assessment (YA) 2026
• the right IRAS form for your company
• a complete worked calculation example you can adapt to your own figures

What Is Company Tax in Singapore in 2026?

Corporate Income Tax (CIT) is charged at a flat 17% of chargeable income, and it applies equally to locally incorporated and foreign companies.

Singapore taxes company profits through its Corporate Income Tax, collected by the Inland Revenue Authority of Singapore (IRAS). The statutory rate has held at a flat 17% of chargeable income for years.

Chargeable income is your accounting profit adjusted for tax-allowable expenses, capital allowances and reliefs. It is not simply the profit shown in your financial statements.

Singapore also levies no capital gains tax, and dividends paid by a Singapore company are generally not taxed again in shareholders' hands under the one-tier system. That combination keeps the effective burden on trading profits comparatively low.

1. Who Pays Corporate Income Tax in Singapore

Every company incorporated in Singapore is within the charge to CIT, whether or not it is tax resident. Incorporation alone does not mean a company owes tax. Liability depends on whether it has taxable chargeable income for the YA. Foreign companies with Singapore-source income fall within scope too. Liability depends on the source and receipt of income, the company's circumstances and any applicable exemptions and deductions, rather than nationality alone.

2. What Income Is Taxable

Most Singapore-sourced income is taxable, but statutory exemptions and incentive schemes can exclude specific receipts. Foreign-sourced income is generally taxable when received or deemed received in Singapore, and may qualify for exemption if the prescribed conditions are met. Dividend, branch and service income from abroad may be exempt if several conditions are met. One condition is that the foreign jurisdiction has a headline tax rate of at least 15%. This refers to the headline rate, not necessarily the rate actually paid on the income.

3. How Year of Assessment and Tax Residence Work

Profits are generally assessed in the YA following the financial year end, although profits from a financial period exceeding 12 months may need to be apportioned between two YAs. A company with a 31 December 2025 year end files for YA 2026. A company is tax resident where its central management and control sit, which affects treaty access and exemption eligibility.

How Do Singapore Corporate Tax Exemptions Work in 2026?

Two schemes reduce Singapore corporate tax in YA 2026. A start-up exemption applies to qualifying new companies in their first three YAs. A partial tax exemption is available from the first YA when the start-up exemption is not claimed.

Both schemes shield a slice of normal chargeable income from the 17% rate. Normal chargeable income means income taxed at the prevailing rate, not income already taxed at a concessionary rate.

A qualifying start-up with S$100,000 of chargeable income pays tax on only S$25,000. That works out to S$4,250 before any rebate, which is why the first three YAs matter so much for new companies.

1. Start-Up Exemption for New Companies

In their first three consecutive YAs, qualifying companies enjoy 75% exemption on the first S$100,000 of normal chargeable income. A further 50% exemption applies to the next S$100,000. The maximum exempt amount is S$125,000 per YA.

2. Partial Tax Exemption for All Companies

From YA 2020 onwards, the partial exemption exempts 75% of the first S$10,000 of normal chargeable income. It exempts 50% of the next S$190,000. The maximum exempt amount is S$102,500 per YA.

3. Who Does Not Qualify for Start-Up Relief

Companies incorporated on or after 26 February 2013 whose principal activity is investment holding do not qualify, nor do companies undertaking property development for sale, investment or both. To qualify, a company must be Singapore-incorporated and Singapore tax resident for the YA. For a company with share capital, its total share capital must be beneficially held directly by no more than 20 shareholders throughout the basis period; companies limited by guarantee must instead meet the applicable membership conditions. The shareholders must be either all individuals. Alternatively, at least one individual must hold 10% or more of the issued ordinary shares.

What Are the 2026 Singapore Corporate Tax Filing Deadlines?

For YA 2026, your company generally files Estimated Chargeable Income within three months of its financial year end, unless exempted, then e-files its corporate tax return by 30 November 2026 unless a waiver applies.

Two obligations anchor the Singapore tax calendar: the Estimated Chargeable Income (ECI) declaration and the annual corporate income tax return. Both are e-filed through IRAS's myTax Portal.

Separately, the Accounting and Corporate Regulatory Authority (ACRA) generally requires an annual return within five months of the financial year end for listed companies and seven months for non-listed companies. Companies with share capital and an overseas branch register generally have six and eight months respectively. That obligation runs alongside your tax filings, not instead of them.

1. The Three-Month ECI Rule

ECI is a declaration of your estimated taxable profit for the financial year. It is due within three months of your financial year end, fixed by the year end itself. A company with a 31 December 2025 year end files ECI by 31 March 2026.

2. The ECI Filing Waiver

No ECI is due when annual revenue is S$5 million or below and ECI is nil for the YA. The nil test is applied before deducting exempt amounts under either exemption scheme. Companies self-assess the waiver, and there is no need to inform IRAS.

3. The 30 November 2026 Return Deadline

Companies generally must e-file their YA 2026 return by 30 November 2026, including dormant and loss-making companies, unless a waiver or a first-filing exception applies. Late filing invites reminders, composition sums and possible enforcement action, so the calendar matters.

Which Corporate Tax Form Should Your Singapore Company File?

Revenue is only one condition. Form C-S (Lite) is available up to S$200,000. Form C-S is available up to S$5 million if the other eligibility conditions are met. Otherwise, file Form C.

IRAS offers Form C-S, Form C-S (Lite), Form C and a simplified Form for Dormant Company for YA 2026. Companies with straightforward tax affairs file the shorter versions, while those claiming reliefs or foreign credits file the full Form C.

1. Form C-S (Lite) for Micro Entities

Companies with annual revenue of S$200,000 or below can use this shortest return if they also meet every Form C-S condition. It asks for six essential fields only. Dormant or loss-making micro entities often use it, subject to IRAS conditions being met in full.

2. Form C-S for Small and Mid-Sized Companies

Form C-S serves companies with annual revenue of S$5 million or below. They must be incorporated in Singapore and taxed at the prevailing 17% rate. They must not claim group relief, carry-back of capital allowances and losses, investment allowance, foreign tax credit or tax deducted at source.

3. Form C for Larger or More Complex Companies

Form C applies to every company outside the simplified forms. Financial statements, the tax computation and supporting schedules must accompany it. It also handles cases where income is taxed at concessionary rates or where group relief is claimed.

How Do You Calculate Singapore Corporate Tax in 2026?

A YA 2026 calculation deducts exempt amounts from chargeable income, applies the 17% rate, then applies the 50% CIT rebate enhanced on 7 April 2026.

Here is an illustrative example of company tax in Singapore for YA 2026. Cash-grant eligibility can change the rebate applied against tax and therefore the tax payable. Our sample company closed its financial year on 31 December 2025. It reported revenue of S$2.8 million, is in its fifth YA, and has chargeable income of S$300,000. Assume it meets the other Form C-S conditions, has no tax set-offs and does not qualify for the cash grant.

Because it is past its first three YAs, the partial exemption applies rather than the start-up scheme. The steps below mirror the summary table, so you can trace every figure.

Step 1: Start From Chargeable Income

Chargeable income is S$300,000, the profit after tax-allowable expenses and capital allowances. It comes from the accounts for the year ended 31 December 2025. The ECI is an estimate and may differ from the final chargeable income declared in Form C-S.

Step 2: Apply the Partial Exemption

The first S$10,000 is exempt at 75%, giving S$7,500 of relief. The next S$190,000 is exempt at 50%, giving S$95,000. Total exempt amount: S$102,500, leaving S$197,500 taxable.

Step 3: Tax the Balance at 17%

S$197,500 multiplied by 17% gives S$33,575 of corporate income tax before rebate. This is the amount entered on the YA 2026 return.

Step 4: Apply the YA 2026 CIT Rebate

According to IRAS, the YA 2026 rebate is 50% of corporate tax payable, capped together with any cash grant at S$40,000; the rate was enhanced on 7 April 2026. Fifty per cent of S$33,575 is S$16,787.50. The final bill is therefore roughly S$16,788.

Step 5: Check the Effective Rate

A final bill near S$16,788 on S$300,000 of chargeable income is an effective rate of about 5.6%. Companies active at disbursement may receive a S$2,000 CIT Rebate Cash Grant. They must have made CPF contributions for at least one Singapore citizen or permanent resident employee in 2025. Shareholders who are also directors are excluded. Where the computed rebate exceeds S$2,000, the grant replaces its first S$2,000: the tax bill is higher than in this example, but the combined benefit is unchanged.

How Does Singapore Company Tax Shape Cross-Border Planning?

Singapore rewards groups that use it as a regional base: no capital gains tax, one-tier dividends and one of Asia's widest treaty networks.

Cross-border planning rarely stops at one border. Many clients begin in Singapore before setting up a business in Thailand or expanding into Bangladesh as their regional footprint grows. Groups with European holding layers often weigh the Isle of Man as a holding jurisdiction alongside Singapore.

For example, a Singapore tax-resident company receiving royalties from Thailand may qualify for reduced tax withholding under the Singapore–Thailand tax treaty, subject to its conditions. The company may need an IRAS certificate of residence to support its claim.

We model these structures with clients before incorporation, because where profits sit decides which exemptions and treaties apply. Our member firms across six continents handle such setups every week, from first filings to group reorganisations.

Conclusion

Singapore company tax in 2026 remains one of the region's most competitive regimes: a 17% headline rate, generous start-up and partial exemptions, and a 50% rebate enhanced after Budget 2026. The trade-off is a firm calendar, with ECI due within three months of your year end and Form C-S, C-S (Lite) or Form C due by 30 November 2026.

As the worked example shows, small changes in exemption eligibility or rebate treatment move the final bill significantly. Getting the ECI and form choice right early avoids amendments and late-filing risk later.

As part of 3E Accounting International Network, we prepare ECI and corporate income tax returns for Singapore companies and coordinate cross-border structuring with member firms across six continents. Talk to us before the 30 November 2026 deadline so your YA 2026 filing is accurate, exempt-optimised and on time.

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