If a business or its owners deliberately under-declared income or over-claimed GST, coming forward before IRAS starts asking can still make a large difference. IRAS says that taxpayers who voluntarily disclose past wilful evasion, and meet its conditions, may have the offence compounded at a reduced penalty of 200% of the tax undercharged instead of being prosecuted. Without that, evasion can lead to prosecution, a penalty of up to 400% of the tax, a fine of up to S$50,000 and up to seven years’ imprisonment. Because the individuals involved face criminal exposure, they should take legal advice before the disclosure is made.
Treat this as your last chance to avoid prosecution. A voluntary disclosure made before IRAS acts is the only route IRAS publishes for deliberate evasion to be compounded instead of prosecuted. Once IRAS sends a query, opens an audit or starts an investigation into the matter, that route closes for it. It must be handled properly: legal advice first, a complete and accurate disclosure, full cooperation and payment. No one can guarantee the outcome, but delay or a partial disclosure can turn a tax problem into a criminal case.
Error, negligence or evasion: which is it?
IRAS treats deliberate evasion differently from mistakes. Its Voluntary Disclosure Programme e-Tax Guide (13th edition, 30 January 2026) says wilful intent to evade has two elements: an act, such as omitting income, understating output tax, overstating input tax or preparing false records, and knowledge that the act will reduce tax. Both must be present.
IRAS’s examples of wilful evasion include:
- declaring cheque, NETS and card sales but not cash sales
- keeping two sets of accounts, one true and one for IRAS
- claiming input tax knowing the business did not incur it
- asking suppliers to bill for services that were never provided
- not charging GST on some sales and leaving those sales out of the income tax return
Most problems we see are not this. Late GST registration, sloppy records and wrong GST codes are usually errors or negligence, and they go through the ordinary disclosure route, with no penalty or a reduced 5% penalty. See our guide to the IRAS Voluntary Disclosure Programme. Deciding which category a case falls in is a judgement that needs the facts and, where intent is in question, a lawyer.
What the evasion disclosure route offers
| Outcome | Where it applies |
|---|---|
| Prosecution, penalty up to 400% of tax undercharged, fine up to S$50,000 and/or up to 7 years’ imprisonment | Wilful evasion that IRAS uncovers, or a disclosure that does not qualify |
| Compounding at a reduced 200% penalty in lieu of prosecution | Wilful evasion voluntarily disclosed, where the disclosure meets IRAS’s conditions |
The same treatment applies to income tax, withholding tax and GST. It is not automatic: IRAS says taxpayers “may be accorded” compounding, and that those who do not qualify may be charged in court. Since 1 January 2020, tax evasion offences are registrable crimes under the Registration of Criminals Act, according to IRAS’s investigation guidance, which is one more reason to avoid a conviction.
The conditions that must be met
- Timely and self-initiated. Made before IRAS sends a query on the matter, or notifies an audit or investigation of it. A disclosure made within the time frame of an IRAS outreach programme, such as a Voluntary Disclosure Opportunity letter, can qualify.
- Accurate and complete. All periods, all entities and all individuals involved. A partial disclosure can fail, and so can one where a related party is already under investigation for the same matter.
- Full cooperation. Answering IRAS’s follow-up questions and supplying documents by the agreed dates.
- Payment. Paying, or agreeing and keeping to an arrangement to pay, the tax and penalty.
IRAS’s guide sets out the information it expects, including how the errors were discovered and the controls put in place to stop them recurring. For a company, the application should come from the managing director or chief executive, or an officer they authorise in writing. Disclosures involving wilful evasion are made by email to [email protected], IRAS’s Investigation and Forensics Division, or in writing to IRAS at Revenue House, 55 Newton Road.
How the work is split between lawyers and accountants
- Legal advice first. A lawyer advises the company and each individual on their exposure, on whether and how to disclose, and on the wording of anything submitted. Directors, owners, family members and staff may have different interests.
- Reconstruct the figures. We rebuild the true income and GST position for every affected period from bank records, sales data and supplier records, and quantify the tax undercharged.
- Prepare the disclosure pack. The schedules, explanations and supporting documents IRAS requires, prepared with the lawyers.
- Deal with IRAS’s follow-up. Respond to requests for information within the agreed time, and arrange payment.
- Rebuild the controls. Proper sales recording, one set of books, company bank accounts only, and GST registration where required.
What not to do
- Do not destroy, alter or backdate records. That can be a separate offence and will undermine any disclosure.
- Do not disclose only the part that is easiest to explain.
- Do not wait until IRAS writes about the specific matter. After that, the disclosure is no longer self-initiated.
- Do not let one family member or business partner disclose without the others knowing. A disclosure by one can lead IRAS to the rest.
Frequently asked questions
Will I definitely avoid prosecution if I disclose?
No one can promise that. IRAS’s published position is that a qualifying voluntary disclosure may be compounded at 200% instead of prosecution. Whether a disclosure qualifies depends on the facts and on meeting every condition.
Can the person who helped prepare the false records be liable?
Yes. IRAS states that persons who assist in evasion may also face prosecution, and it has prosecuted tax agents and finance staff.
We already received an IRAS audit letter on this. Can we still use this route?
Not for errors directly related to the scope of that query, audit or investigation. Unrelated errors may still qualify. Get legal advice at once.
Related: what happens in an IRAS tax investigation, and the tax and GST hub.
Need help with a tax evasion disclosure?
If your company, or you as a director or shareholder, is dealing with past under-declaration that may be treated as evasion, contact the Raffles Corporate Services team at [email protected] or on WhatsApp at +65 8501 7133 or +65 9018 0072. We will help you understand the documents and deadlines and reconstruct the true figures. Where your matter needs a lawyer, we will refer you to a firm on our panel of Singapore law firms that regularly handles tax investigations and voluntary disclosures. Raffles Corporate Services is a corporate services provider, not a law firm, and this article is general information, not legal advice.
Kevin Yeo, Raffles Corporate Services