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Use the S$5 million revenue and nil ECI tests correctly, document the self-assessment and avoid confusing exemptions with nil taxable profit.
A company qualifies for Singapore’s ECI filing waiver for a year of assessment only when both tests are met: annual revenue for the financial year is S$5 million or below, and Estimated Chargeable Income is nil. Passing only one test is not enough.
The company self-assesses the waiver. It does not need to ask IRAS for approval or file a nil estimate when both tests are satisfied. Keep a short calculation because the myTax Portal may still show the ECI status as ready to file.
Calculate annual revenue using the IRAS definition
IRAS defines revenue for this purpose as the company’s main source of income. Separate-source income such as interest, dividends and rental that does not arise from the principal activity is excluded. Gains on disposal of fixed assets are also not revenue for the ECI declaration.
An investment holding company is different because investment income is its main source. Its dividends and interest are included as revenue. Start with the business model and general ledger rather than taking one turnover line from a management dashboard without checking what it contains.
The threshold is S$5 million or below. A company with exactly S$5 million passes the revenue test. A company with S$5,000,001 does not, even if its ECI is nil.
Calculate ECI before tax exemptions
The IRAS ECI guide defines ECI as an estimate of taxable profits after tax-allowable expenses. For the waiver, nil ECI is tested before deducting the amount exempted under the partial tax exemption or start-up tax exemption schemes.
A company therefore cannot take a positive chargeable-income estimate, apply an exemption until tax payable becomes nil and call the ECI nil. Complete the tax adjustments, capital allowances, loss and relief analysis needed to establish the amount before the relevant exemption.
| Annual revenue | ECI before exemption | Waiver result |
|---|---|---|
| S$5 million | Nil | Waiver available |
| S$5 million | S$20,000 | ECI must be filed |
| S$7 million | Nil | ECI must be filed as nil |
| S$800,000 | S$12,000 before start-up exemption | ECI must be filed |
Prepare a one-page waiver record
Retain the financial year end, year of assessment, revenue calculation, ECI computation, preparer, approver and date of review. Reconcile the revenue figure to the accounts and explain separate-source items. Reconcile the ECI to management accounts with estimated tax adjustments.
The calculation can be provisional, but it must be reasonable. If the books are incomplete at the three-month deadline, the company should not declare nil merely because no tax computation has been prepared. Close the material accounts and identify uncertain items early enough to make an informed estimate.
Keep the waiver conclusion separate from the later corporate income tax return. The waiver removes only the need to furnish ECI for that year. It does not remove the annual return obligation, record-keeping duties or the need to update the final tax computation when complete accounts are available.
The three-month deadline still controls required filings
A company that does not meet the waiver must file ECI within three months after its FYE, even if it does not receive an IRAS reminder. A positive ECI filing can also support GIRO instalments for a Singapore-registered company. The current IRAS schedule provides more instalments for earlier filing, subject to the stated monthly cut-off and GIRO conditions.
A company with revenue above S$5 million and nil ECI still files. It enters zero as the amount taxed at 17 per cent. Filing a nil ECI in that situation is different from relying on the waiver.
Do not let the portal status decide the tax answer
IRAS says a company that qualifies for the waiver need not file even if the portal shows ready to file. No separate notice to IRAS is needed. Save the waiver record with the tax file and proceed to the later corporate income tax return work.
If IRAS issues an estimated Notice of Assessment despite a valid waiver, write through myTax Mail before the payment due date and confirm that annual revenue was S$5 million or below and ECI was nil. IRAS states that it will amend the assessment in that case.
Know the consequence of an incorrect non-filing decision
If a company was required to file and did not, IRAS may issue an estimated assessment using past income or other available information. The tax is payable within one month and instalments are not available. An objection must be filed within two months if the company disputes the estimate, but payment remains due while the objection is considered.
The IRAS assessment guide distinguishes estimated assessments arising from non-filing from completed assessments. Keep the filing or waiver evidence so the company can respond quickly.
A service-company example
A consulting company has S$4.8 million in service fees, S$80,000 of bank interest and a S$30,000 gain on disposal of equipment. The service fees are its main-source revenue. The interest is a separate source and the disposal gain is not revenue for the declaration. If the tax computation produces nil ECI before exemptions, the company may meet both waiver tests.
If the same company has S$10,000 of ECI before partial exemption, it must file even if no tax is ultimately payable after relief. The distinction belongs in the tax computation, not in a note added after the deadline.
Our YA 2026 corporate tax calendar places ECI beside the annual return cycle, while the Form C-S, Lite and Form C guide covers the later return choice. The Corporate and International Tax Consulting hub connects the wider compliance topics.
A defensible waiver is two reconciled numbers and one documented conclusion. If either number is uncertain, finish the tax work before treating non-filing as the answer.