What happens if Singapore corporate income tax is filed late?
Generally, IRAS may issue an estimated assessment based on past income and impose a composition amount. If the return remains unfiled, court proceedings and fines may apply to the company and its directors.
- Filing deadline: the corporate income tax return (Form C-S/C-S (Lite)/C) is due by 30 November every year.
- Estimated assessment (estimated Notice of Assessment): the estimated tax must be paid within 1 month of the notice date. To object, the corporate income tax return, financial statements and tax computation must be submitted together for the estimated assessment to be revised.
- Composition: depending on past filing history, up to S$5,000 per offence may be imposed.
- Court penalties: on conviction, the company may be fined up to S$5,000 per offence, and a director may be fined up to S$10,000, imprisoned for up to 12 months, or both.
- Not filed for 2 years or more: a penalty of twice the assessed tax may be added.
Dormant companies and companies with no revenue are generally still required to file unless they have been granted a filing waiver by IRAS.
Tax treatment can differ depending on the company's revenue, shareholder structure and transactions, so please consult an accounting professional before applying it.
The Lee Kim Alliance accounting team provides accounting and tax consultations.
As of November 2026, source: IRAS
