Corporate Taxation
All companies in Singapore are required to file accurate and timely corporate income tax returns based on their actual business income and allowable deductions. Compliance involves submitting Estimated Chargeable Income (ECI), Annual Form C/C-S filings, and maintaining proper tax records. Businesses must also adhere to prevailing tax laws, claim eligible exemptions or incentives, and respond to any IRAS queries or audits.
Tax Services:
Corporate tax compliance prepared from organised financial information
Corporate tax obligations can involve filing requirements, deadlines and supporting computations, making it important for businesses to keep their financial information organised and their submissions properly prepared. We provide practical support for ECI, corporate tax computations, Form C-S (Lite), Form C-S or Form C filing, withholding-tax matters and routine IRAS correspondence.
Our aim is to help clients manage their corporate tax responsibilities in a clear, organised and timely manner, based on the information provided and within the agreed scope, so that business owners can devote more attention to running and developing their businesses.
Where businesses commonly struggle
- Accounting profit is not the same as chargeable income. Tax adjustments, capital allowances and non-deductible items need to be considered before the return is filed.
- ECI and the annual corporate tax return follow different timelines, and the filing form depends on the company’s circumstances and eligibility.
- Supporting schedules may be incomplete because the underlying accounting records were not prepared with the tax computation in mind.
- Cross-border payments can create withholding-tax questions that are easy to miss when payment approval and accounting are handled separately.
- IRAS queries often require clear supporting information and explanations of the position taken, not simply a copy of the tax return.
We provide the following support:
ECI preparation and filing
Preparation of Estimated Chargeable Income based on the available financial information and tax adjustments, with submission within the applicable timeline where filing is required.
Annual corporate income tax return
Preparation and filing support for Form C-S (Lite), Form C-S or Form C. Identifying the appropriate filing route and checking that the return is supported by the necessary computation and schedules.
Tax computation and supporting schedules
Preparation of the tax computation from the financial statements or management accounts, including relevant adjustments such as capital allowances, brought-forward items, donations and other tax adjustments.
Corporate tax advisory and transaction support
Practical guidance on the tax treatment of selected business transactions, deductions, exemptions or reliefs so as to support informed decisions and compliance, not aggressive tax outcomes or guaranteed savings.
Withholding-tax support
Review and filing support for applicable payments to non-residents, such as certain interest, royalty or service payments. Tax treatment and rate depend on the nature of the payment, recipient and supporting information.
IRAS queries, reviews and audit support
Assistance with organising supporting documents, preparing explanations and responding to routine IRAS enquiries, reviews or audit requests.
Tax residency (Certificate of Residence) support
Assist with Certificate of Residence applications where the company is eligible and documentation is available. Treaty benefits remain subject to the applicable treaty conditions and IRAS requirements.
Who will find our services useful?
1) SMEs without an in-house tax functionBusinesses that prepare accounts internally or through an external accountant but need help translating those records into corporate tax filings
2) Foreign-owned Singapore companiesManagement teams that need local support with Singapore filing requirements, cross-border payments or tax-residency documentation.
3) Companies responding to IRASBusinesses that have received information requests, assessments or review queries and need help organising records and preparing a response.
4) Newly incorporated companies approaching their first filing cycleFounders who are unfamiliar with the relationship between the financial year, ECI and the annual corporate income tax return.
5) Companies with non-routine tax mattersBusinesses with capital allowances, brought-forward losses, donations, foreign-source items, related-party matters or withholding-tax obligations.
Corporate Tax Overview
Singapore offers one of the most attractive and business-friendly tax regimes globally, designed to support enterprise growth, innovation, and international expansion. The corporate income tax rate remains at a flat 17%. Singapore generally does not impose capital gains tax, and dividends paid by Singapore-resident companies under the one-tier corporate tax system are generally not taxable in the hands of shareholders, making it highly favorable for both local and foreign companies. To ease compliance and reduce the tax burden on businesses, especially startups and SMEs, Singapore provides a range of tax exemptions, incentives, and reliefs, such as the Start-up Tax Exemption (SUTE), Partial Tax Exemption, and enhanced deductions for R&D and IP development.
The Inland Revenue Authority of Singapore (IRAS) requires companies to maintain proper records, file annual income tax returns (Form C, C-S, or C-S Lite), and submit Estimated Chargeable Income (ECI) within three months of the financial year-end, unless exempt. With increasing digitalization, the IRAS has streamlined filing procedures through online platforms and implemented stricter enforcement on transfer pricing, foreign-sourced income, and economic substance requirements. Staying compliant not only avoids penalties but also unlocks access to valuable government grants and tax incentive schemes for qualifying activities.
Who needs to file Corporate Tax Returns
All Singapore-registered companies must file their Corporate Income Tax Returns even if they are making losses or have no income during the financial year. This is done through electronic submission via IRAS’ myTax Portal. Unlike the Form C which requires the submission of financial statements and tax computation, the Form C-S (Lite) and Form C-S do not require the submission of financial statements and tax computations. However, companies are still obligated to prepare financial statements and tax computations and retain them for submission upon IRAS' request. Choosing the correct form depends on the company's annual revenue, nature of income, and whether it is claiming specific tax benefits. In Singapore, every company must electronically submit their Corporate Income Tax Returns through either Form C or Form C-S.
CONSEQUENCES FOR LATE OR NON-FILING OF TAX RETURNS
Failure to file your Corporate Income Tax Returns together with financial statements and tax computation by the due date is an offence.
IRAS may take the following recovery actions if you fail to file by the due date:
- Issue an estimated Notice of Assessment. You must pay the estimated tax within 1 month
- Offer to compound the offence
- Issue a Section 65B(3) notice to your company director to submit the required information in the Corporate Income Tax Returns to IRAS
- Issue a Notice to Attend Court/ Summons to the company or persons responsible for running of the company (including the directors)
Scenario | Filing Requirement | Remarks |
|---|---|---|
Dormant company (no business activity or income for the YA) | Required to file a simplified Corporate Income Tax Return using Form C-S/C for a Dormant Company unless granted a waiver by the IRAS. | File a simplified Tax Return by completing only 2 essential fields |
Active company (regardless of income level or losses) | Mandatory to file your Corporate Income Tax Return as long as you have carried out business. | Refer to " Choosing the correct tax return filing form " for the type of Tax Return filing required. |
Tax assessment for the previous YA is still under review | Mandatory to file Corporate Income Tax Return for the current YA based on the company’s submitted tax position for the previous YA. | Prepare tax computation by using the same unclaimed losses and asset written down values from your previous year YA tax computation when preparing your current year YA return.
These amounts will be automatically pre-filled based on what your company declared in the previous year YA tax form. |
Missed deadline or failed to file | Not acceptable – subject to enforcement actions (e.g., composition fines, court summons). | The Corporate Income Tax Return filing deadline is 30 November each year. Fines and Penalty apply if fail to do so. |
Choosing the correct Tax Return filing form
Criteria | Form C-S (Lite) | Form C-S | Form C |
|---|---|---|---|
Annual Revenue | S$200,000 or below | S$5 million or below | Any amount (for companies that do not qualify to file Form C-S or Form C-S (Lite)) |
Incorporation | Singapore-incorporated companies | Singapore-incorporated companies | All companies, including foreign branches |
Income Type | Only income taxable at the prevailing corporate tax rate of 17%. | Only income taxable at the prevailing corporate tax rate of 17%. | Any income, including income subject to special tax rates or exemptions. |
Claims for Tax Benefits | Not claiming any of the following: carry-back of current year capital allowances/losses, group relief, investment allowance, foreign tax credit, or tax deducted at source. | Not claiming any of the following: carry-back of current year capital allowances/losses, group relief, investment allowance, foreign tax credit, or tax deducted at source. | Companies claiming any of the above tax benefits |
Submission of Financial Statements & Tax Computation | Not required to submit with the form; however, companies should prepare and be ready to submit upon IRAS' request. | Not required to submit with the form; however, companies should prepare and be ready to submit upon IRAS' request. | Required to submit audited or unaudited financial statements, tax computation, and supporting schedules with the form. |
Form Complexity | Simplest; requires completion of only 6 essential fields. | Simplified; requires fewer fields compared to Form C. | Comprehensive; requires detailed information and supporting documents |
Filing Deadline | 30 November of the Year of Assessment (YA) | 30 November of the Year of Assessment (YA) | 30 November of the Year of Assessment (YA) |
Practical solutions tailored to your business
Tell us about your business and the support you require. We will help identify an appropriate starting scope and explain the information needed before work begins.