CORPORATE TAX GUIDE · UPDATED AUGUST 2026
Late corporate tax filing in Singapore: what IRAS does next
If your company missed the 30 November deadline, the first consequence is usually not a fine. It is an estimated Notice of Assessment — IRAS works out what it thinks you owe, and that estimate is often higher than your real liability. You must pay it within one month even if you disagree, and you have two months to object with a proper return behind you.
FIRST
Confirm you are actually late.
The corporate income tax filing deadline is 30 November each year, and it applies to every company — including companies that made a loss and companies that did not carry on business. Filing YA 2026 by 30 November 2026 covers the financial year ended in 2025. Two things regularly cause a false alarm.
A non-December financial year end
Your financial year end changes which Year of Assessment you file for, not the 30 November date itself. The date is fixed; what moves is the period it reports on.
Confusing IRAS with ACRA
The Annual Return filed with ACRA and the tax return filed with IRAS are separate obligations, with separate deadlines and separate penalty regimes. Missing one does not mean you missed the other.
ESCALATION
What IRAS does, in sequence.
Failing to file your return together with your financial statements and tax computation by the due date is an offence. But IRAS does not jump straight to court. There is an escalation ladder, and at every rung the exit is the same: file the outstanding return.
An estimated Notice of Assessment
IRAS raises an assessment from your previous years' income or other information it holds, and may assume an increase in your company's income. The estimate is frequently higher than what you actually owe. The tax is payable within one month of the date on the notice.
An offer to compound the offence
Rather than prosecuting, IRAS may offer the option to pay a composition amount of up to S$5,000 per offence, depending on the company's past compliance record. To avoid prosecution you must pay it and file the overdue return and documents by the date specified.
A Section 65B(3) notice to the director
IRAS can require the company director personally to provide the information that should have been in the return. This is the point at which the problem stops being the company's alone and becomes the director's.
A Notice to Attend Court or Summons
Issued to the company and/or the people responsible for running it, including directors, if IRAS does not receive the return and documents by the due date, or the composition payment by its due date.
If it has gone further than that.
- Two or more years unfiled: on conviction in court, for each offence, the company may be ordered to pay a penalty of twice the amount of tax assessed, plus a fine of up to S$5,000.
- Failing to attend court: further legal action follows, potentially including a warrant of arrest against the company director.
- A director convicted of failing to comply with a Section 65B(3) notice: a fine of up to S$10,000, or imprisonment of up to 12 months, or both — for each offence.
These are the maximums IRAS publishes, not predictions of what will happen in any particular case. They are worth knowing because they are the reason this is better fixed now than in the new year.
TWO CLOCKS
Late filing and late payment are different problems.
They run on separate clocks, and you can be caught by both at once — which is exactly what happens when an estimated assessment lands and gets ignored.
No return, financial statements and tax computation by 30 November
Late filing
Estimated assessment; composition of up to S$5,000 per offence; escalation towards court. Ends when you file the outstanding return and documents.
Tax unpaid one month after the date of the Notice of Assessment
Late payment
A 5% penalty on the unpaid tax. Ends when you pay the tax in full.
IRAS’s own worked example
A company receives a Notice of Assessment dated 2 June with S$10,000 payable, due 2 July. Payment is not made, so a 5% penalty of S$500 is imposed. In a second example, a company objects to an estimated assessment and does not pay — the 5% penalty is still imposed. The company later pays, the assessment is amended down to S$1,300, and the penalty is revised to S$65, with the excess refunded.
The lesson is that objecting protects you on the amount, not on the penalty.
If tax stays unpaid, IRAS may appoint agents — your bank, your tenant, your lawyer, or any third party holding money due to you — to recover it. When a bank is appointed, you may be unable to access the account until the tax is paid in full. For a small business that is usually far more disruptive than the penalty itself.
RECOVERY PLAN
What to do this week.
Get the return filed, even if it is imperfect
Every rung of the escalation ladder has the same exit. Filing stops the escalation; nothing else does.
Diarise two separate dates
Payment is due one month from the date of the Notice of Assessment. An objection is due two months from it. They are not the same deadline, and missing the first while working on the second is the classic mistake.
Pay the estimated tax, even while objecting
You get the excess back if the assessment is revised. You do not get the 5% late payment penalty back for having been right.
File the objection with the full document set
IRAS is clear that without the return, financial statements and tax computation, the estimated assessment will not be revised. An objection on its own achieves nothing.
Treat a composition offer date as firm
Pay it and file by the stated deadline. Missing that date is what converts a payable amount into a court date.
Consider a waiver appeal, if you qualify
Appeals go through the Appeal Penalty Waiver service on myTax Portal and give an instant outcome. Do not submit them by email or myTax Mail, which only delays them.
SCENARIOS
The reason for the delay changes the fix.
The company was dormant
A dormant company must still e-File the Form for Dormant Company, unless IRAS has granted a waiver of return submission. Dormancy reduces the work; it does not remove the obligation. This is one of the most common ways a small company quietly accumulates two years of non-filing.
The company made a loss
Filing is required whether or not there is tax to pay, and the offence is the failure to file, not the failure to pay. Filing a loss year also matters commercially: unutilised losses can be carried forward, and you cannot carry forward what you never reported.
The accounts are not finalised
File on the best figures you have rather than not filing. An amended position later is routine; a Section 65B(3) notice to your director is not. If the delay is because the bookkeeping is behind, that is the real problem to solve.
Several years are outstanding
Deal with the oldest year first. Two or more unfiled years is the specific trigger for a Notice to Attend Court, and the court penalty is calculated per offence, so getting the count below two changes your exposure materially.
The estimated assessment looks far too high
That is expected, because IRAS may assume an increase in your income when estimating. It is not a judgement about your business and it is not final. Pay it, then object within two months with the complete document set, and the excess is refunded.
A tax agent was supposed to handle it
IRAS states that as a director you remain responsible and liable for the company's filing and payment, even if your agent fails to settle these promptly. Choosing who files for you is a decision about your own exposure, not just an administrative one.
Common questions.
What happens if I file my corporate tax return after 30 November?
IRAS may issue an estimated Notice of Assessment based on your previous years' income, offer to compound the offence for up to S$5,000, issue a Section 65B(3) notice to your director, or issue a Notice to Attend Court. Filing the outstanding return is what stops the escalation at every stage.
How much is the penalty for late corporate tax filing in Singapore?
There is no single fixed figure. IRAS may offer composition of up to S$5,000 per offence depending on your past compliance record. Separately, unpaid tax attracts a 5% late payment penalty. If the matter reaches court after two or more unfiled years, the company may be ordered to pay twice the tax assessed plus a fine of up to S$5,000.
Do I have to pay an estimated assessment I disagree with?
Yes. IRAS requires the estimated tax to be paid within one month of the date of the Notice of Assessment even if you intend to object or are awaiting the outcome. If the assessment is later revised downwards, the excess is refunded.
How long do I have to object to an estimated assessment?
Two months from the date of the Notice of Assessment. You must submit the tax return, financial statements and tax computation with the objection. Without them, IRAS states the estimated assessment will not be revised.
Does a dormant or loss-making company still have to file?
Yes. Companies that made a loss or did not carry on business must still file. A dormant company must e-File the Form for Dormant Company unless it has been granted a waiver of return submission.
Can the penalty be waived?
It can be appealed through the Appeal Penalty Waiver service on myTax Portal, which gives an instant outcome. A late payment penalty appeal requires the overdue tax to have been paid in full by the date on the penalty notice, with no waiver granted in the past two calendar years. A composition appeal requires the outstanding documents to have been filed before the due date in the offer, and on-time filing for the past two years.
I use a tax agent — am I still responsible?
Yes. IRAS states that as a director you remain responsible and liable for the company's filing and payment issues, even if your agent fails to settle them promptly.
Official sources
IRAS rules and penalties can change. These primary sources were checked on 9 August 2026.
This guide provides general information, not tax advice. IRAS outcomes depend on the company’s facts, filing history, officers, correspondence and the specific default. Figures quoted are the maximums IRAS publishes, not the amount that will apply to your company.