Singapore IRAS Tax Filing Deadlines, Payments & Penalties Guide 2026

Complete guide to IRAS tax deadlines, payment options, and late filing penalties in Singapore. Explains April 18 individual deadline, 5% late penalty, & GIRO.

Statutory Overview & Legal Tax Framework

Compliance with statutory tax filing deadlines and payment obligations in Singapore is strictly enforced by IRAS under the Income Tax Act (Cap. 134), Goods and Services Tax Act, and Property Tax Act. For individual income tax, e-filing must be completed by April 18. For corporate tax, Estimated Chargeable Income (ECI) must be filed within 3 months of financial year-end, and Form C-S/C must be submitted by November 30. Failure to file tax returns on time attracts late filing fees ranging from S$150 to S$5,000 per offense. Failure to pay tax within 30 days of the Notice of Assessment (NOA) incurs an immediate 5% late payment penalty, followed by an additional 1% monthly penalty up to 12%.

Key Tax Criteria & Statutory Rules

Statutory Annual Filing Deadlines ScheduleDeadlines Schedule

Individual E-filing (April 18); Corporate ECI (3 months post FYE); Corporate Form C-S (November 30).

5% Immediate Late Payment Penalty + 1% Monthly Interest5% Late Fee

5% penalty is imposed if tax is unpaid 30 days post NOA; 1% per month added if unpaid after 60 days.

Late Filing Composition Fine (S$150 - S$1,000)Composition Fine

IRAS issues composition fine for late returns; non-payment results in court summons.

Approved Tax Payment Channels (GIRO, PayNow, AXS)Payment Channels

Pay via 12-month GIRO, PayNow QR, Internet Banking, AXS stations, or credit cards.

Qualification Rules & Tax Compliance

Taxpayers who miss filing deadlines receive formal IRAS Notice of Composition or Summons.

Extension of time to file must be requested online on myTax Portal before the official deadline.

GIRO payment arrangements waive immediate 30-day payment deadlines into 12 monthly installments.

IRAS can issue Travel Restrictions or Bank Account Appointments for severe tax default.

IRAS Filing & Verification Checklist

Income Tax Act Penalties & Enforcement Provisions

IRAS Notice of Assessment (NOA) & Payment Voucher

Singpass Access for myTax Portal Extension Request

PayNow QR Code / Internet Banking Payment Receipt

Step-by-Step IRAS Filing & Payment Workflow

Mark Statutory Tax Filing Dates on Calendar

Set reminders for April 18 (Individual Tax) and November 30 (Corporate Tax).

Request Filing Extension on myTax Portal if Delayed

Apply online for up to 14 days filing extension prior to deadline if experiencing delays.

Receive IRAS Notice of Assessment (NOA) Tax Bill

Review tax bill payment due date (strictly 30 days from NOA issue date).

Set Up Interest-Free GIRO 12-Month Payment Plan

Activate GIRO direct debit to avoid 5% late payment penalty automatically.

Settle Outstanding Balances to Avoid Enforcement Action

Pay via PayNow QR or GIRO to clear tax debt and maintain clean IRAS compliance standing.

Frequently Asked Questions (FAQ)

The e-filing deadline for individual income tax on the IRAS myTax Portal is April 18 of each Year of Assessment.

IRAS may issue a late filing fee (composition fine) ranging from S$150 to S$1,000, and issue an estimated tax assessment. Continued failure to file can result in a court summons.

If tax is not paid within 30 days from the date of the Notice of Assessment, IRAS imposes an immediate 5% late payment penalty. An additional 1% monthly penalty applies for each month the tax remains unpaid.

Yes. Taxpayers can apply for a filing extension of up to 14 days on the myTax Portal prior to the filing deadline.

Companies must file Estimated Chargeable Income (ECI) within 3 months of their financial year-end, and submit Form C-S or Form C by November 30 of each Year of Assessment.

IRAS can appoint your bank, employer, or tenant as a agent to collect unpaid taxes from your accounts, impose travel restrictions preventing departure from Singapore, or initiate court proceedings.