Singapore: filing and deadlines

This page covers when and how to report crypto to the Inland Revenue Authority of Singapore (IRAS). Whether your crypto is taxable at all is on personal tax and business tax. It is general information, not tax advice; the dates in your own notice from IRAS come first.

Deadline calendar

The dates below are for year of assessment (YA) 2026, which covers income earned in 2025, as published by IRAS. Later years follow the same pattern.

Date	What	Who
1 March 2026	Filing of individual returns for YA 2026 opens; employers in the Auto-Inclusion Scheme have submitted employment income	Individuals
31 March 2026	Estimated chargeable income (ECI) due for a December financial year-end	Companies
18 April 2026	Individual and partnership income tax return due (e-filing and paper)	Individuals
End April to end September 2026	Notices of assessment (tax bills) issued; tax is due one month after the date of the notice	Individuals
30 November 2026	Corporate income tax return due (Form C-S, C-S (Lite) or C)	Companies
31 December 2027	Existing users of a crypto provider must have given their tax self-certification for CARF	Crypto users and providers
31 March and 31 May	CARF registration (by 31 March) and annual CARF return (by 31 May) for the previous calendar year	Crypto providers

Individuals: step by step

Do you have to file?

• You received a letter, form or SMS from IRAS telling you to file: you must file, whatever you earned.
• Otherwise you generally must file if, in the previous calendar year, your total income was more than SGD 22,000, or your self-employment income gave a net profit of more than SGD 6,000.
• Non-residents who derived income from Singapore must file, whatever the amount.
• If you are under the No-Filing Service, you do not have to file, but you must file a return by 18 April if you have income to add that is not pre-filled. The IRAS Filing Checker on its website tells you which applies.

Crypto in the return

There is no separate crypto question in the return. IRAS says “you do not need to declare gains that are not taxable”, so gains from crypto held as a personal investment stay out of the return. If IRAS would see your gains as trading income (see the badges of trade), you declare them. IRAS’s page on gains says taxable gains from the sale of property go under “Other Income”; it does not name a separate box for crypto. If you are unsure whether your gains are taxable, the IRAS e-Tax Guide gives phone numbers for questions (1800-356 8300 for individual tax).

Extension and payment

You can ask for an extension of up to 14 days with the “Apply for Extension of Time to File” service in the myTax Portal. No extension is given if you are under the No-Filing Service. If you e-filed, you can re-file once by 18 April; after that you change your return with the “Amend Tax Bill” service within 30 days of the date of your tax bill. Tax is payable within one month of the date of the notice of assessment, also if you object to it.

Companies

• Estimated chargeable income (ECI). IRAS publishes the ECI due dates by financial year-end: 31 March 2026 for a December year-end, 30 June 2026 for March, 30 September 2026 for June and 31 December 2026 for September.
• Corporate income tax return. Form C-S, Form C-S (Lite) or Form C for YA 2026 is due on 30 November 2026.
• GST. GST-registered businesses file a GST return for each accounting period, for example by 31 January 2026 for the quarter ending in December.

What providers report (CARF)

Singapore has committed to the OECD Crypto-Asset Reporting Framework (CARF) and “is intending to commence CARF exchanges with partner jurisdictions from September 2028”, according to IRAS. The law is Part 20B of the Income Tax Act 1947 and the Income Tax (International Tax Compliance Agreements) (Crypto-Asset Reporting Framework) Regulations 2026, enacted on 11 August 2026, with an IRAS e-Tax Guide published the same day.

• Who reports. Reporting Singaporean crypto-asset service providers (exchanges, brokers and similar businesses). They register with IRAS by 31 March after the year in which the obligation arises, and file an annual return (or a nil return) by 31 May for the previous calendar year.
• What they report. Per user and per type of crypto-asset: acquisitions and disposals against money or other crypto-assets (gross amounts, units and number of transactions), and transfers, broken down by type where known, such as airdrops or staking income. Users’ tax identification numbers are part of the report.
• What it means for you. Your provider will ask you for a self-certification of your tax residence. If you were already a customer and have not given it by 31 December 2027, the provider must stop carrying out transactions for you from 1 January 2028 until you do.

IRAS passes the data to the tax authorities of the countries where users are resident. For Singapore residents, data from providers abroad will come to IRAS from countries that exchange with Singapore. CARF does not change how you file your own return.

Records to keep

IRAS asks taxpayers to keep proper records of digital token transactions and provide them on request. Its e-Tax Guide lists the date of the transaction, the number of tokens received or sold, their value at the time, the exchange rate used, the purpose of the transaction, details of customers or suppliers, and receipts and invoices for business expenses.

Keep them for five years. For individuals, IRAS gives the example that records for YA 2026 (1 January to 31 December 2025) should be kept until 31 December 2030. Companies must keep their records for at least five years from the relevant YA; poor record keeping can lead to penalties of up to SGD 5,000. Even if you think your gains are not taxable, records of why you bought and how long you held help if IRAS asks.

Penalties and voluntary disclosure

Situation	Consequence (as published, October 2026)
Return not filed on time	Estimated assessment (tax due within one month), an offer of composition of up to SGD 5,000 per offence, or a summons to court
Tax not paid on time	5% late payment penalty, then 1% per completed month after 60 days, up to 12% of the unpaid tax
Incorrect return without reasonable excuse or through negligence	Penalty up to 200% of the tax undercharged, a fine up to SGD 5,000 and/or up to three years in prison
Incorrect return with intent to evade tax	Penalty up to 400% of the tax undercharged, a fine up to SGD 50,000 and/or up to five years in prison

Forgot to declare taxable gains? Under the IRAS Voluntary Disclosure Programme, a disclosure that is accurate, complete, timely and self-initiated gets a waiver of penalty if you make it within one year of the statutory filing date. After that grace period IRAS imposes a reduced penalty of 5% of the tax undercharged for each year the disclosure was late. The tax itself is always due.

Sources

• IRAS: Due dates (2026) (last checked October 2026)
• IRAS: Tax season 2026, all you need to know (last checked October 2026)
• IRAS: Individuals required to file tax (last checked October 2026)
• IRAS: Gains from sale of property, shares and financial instruments (last checked October 2026)
• IRAS: Basic guide for new individual taxpayers (last checked October 2026)
• IRAS: Income Tax Treatment of Digital Tokens (e-Tax Guide, 30 January 2026) (last checked October 2026)
• IRAS: Record keeping requirements (companies) (last checked October 2026)
• IRAS: Crypto-Asset Reporting Framework (CARF), overview and latest developments (last checked October 2026)
• IRAS: Crypto-Asset Reporting Framework (e-Tax Guide, first edition) (last checked October 2026)
• IRAS: Late filing or non-filing of individual income tax returns (last checked October 2026)
• IRAS: Late payment or non-payment of individual income tax (last checked October 2026)
• IRAS: Errors in tax returns (penalties and voluntary disclosure) (last checked October 2026)

This page is general information, not tax advice. Rules, amounts and dates change, so check the official sources above and your own notice from IRAS before you act.