Key Tax Deadlines in Singapore for 2026

Planning your 2026 tax calendar? This page sets out the key Singapore tax filing and payment due dates that fall in 2026 – covering individual and corporate income tax, Estimated Chargeable Income (ECI), GST returns and property tax – and highlights what is new for the Year of Assessment (YA) 2026. Income earned in 2025 is assessed in YA 2026, and most 2026 dates follow IRAS's standard annual cycle. Always confirm the current dates on the IRAS website, as a due date can shift when it falls on a weekend or public holiday.

Singapore Tax Deadlines for 2026

January to March

• 31 Jan 2026: Payment of 2026 Property Tax Bill, e-Submission of Donations, Filing of GST return for Dec 2025.
• 01 Mar 2026: e-Submission of Commission, e-Submission of Employment Income.
• 31 Mar 2026: Filing of Estimated Chargeable Income (ECI) for December financial year-end, CRS Registration Application.

April to June

• 15 Apr 2026: Submission of Individual and Partnership Income Tax (Paper Form).
• 18 Apr 2026: e-Filing of Individual and Partnership Income Tax.
• 30 Apr 2026: Filing of GST return for Mar 2026.
• 31 May 2026: Submission of FATCA and CRS return.
• 30 Jun 2026: Filing of ECI for March financial year-end.

July to September

• 31 Jul 2026: Filing of GST return for Jun 2026.
• 30 Sep 2026: Filing of ECI for June financial year-end.

October to December

• 31 Oct 2026: Filing of GST return for Sep 2026.
• 30 Nov 2026: Filing of Corporate Income Tax Return.
• 31 Dec 2026: Filing of ECI for September financial year-end.

What's Different for 2026

The core filing calendar is broadly consistent from year to year, but a few points are worth noting for 2026:

• Year of Assessment 2026: income earned in the 2025 calendar or financial year is reported in YA 2026. Individuals file by 15 April 2026 (paper) or 18 April 2026 (e-Filing).
• Corporate income tax: the YA 2026 Corporate Income Tax Return (Form C-S / C-S (Lite) / C) is due by 30 November 2026 for e-Filing, with ECI due within three months of your financial year-end.
• Budget 2026 measures: the YA 2026 Corporate Income Tax Rebate (50%, capped at $40,000) and other reliefs may affect your final position – see our Singapore Budget 2026 overview.
• GST InvoiceNow (e-invoicing): GST-registered businesses should factor in Singapore's phased adoption of InvoiceNow – see our guide to the GST InvoiceNow requirement.
• Weekend and public-holiday dates: where a due date falls on a weekend or public holiday, check IRAS for the applicable arrangement before assuming an extension.

Looking for last year's dates? See Singapore Tax Filing Deadlines 2025.

Importance of Staying Tax Compliant

Singapore's tax system is strictly regulated by IRAS. Failure to meet deadlines can result in:

• Financial penalties for late submissions.
• Interest charges on overdue taxes.
• Compliance risks affecting financial planning and operations.

How to Stay on Top of Your Tax Deadlines

• Set Calendar Alerts: Keep track of key tax deadlines.
• Automate Tax Processes: Use accounting software to streamline filings.
• Engage Tax Professionals: Work with advisors to ensure compliance.
• Conduct Regular Tax Reviews: Monitor and adjust tax strategies periodically.

Plan for a Hassle-Free Tax Filing Process in 2026

Proactive tax planning is essential for seamless compliance. Automate filings, stay informed, and seek expert guidance to avoid penalties and ensure smooth operations.

Save this guide and share it with your network! For personalized tax assistance, reach out to Apexia Corporate Advisory for expert support in managing your tax obligations.

Frequently Asked Questions: 2026 Tax Deadlines

When is the corporate income tax filing deadline for 2026?

The Corporate Income Tax Return (Form C-S / C-S (Lite) / C) for YA 2026 is due by 30 November 2026 for e-Filing. Estimated Chargeable Income (ECI) is generally due within three months of your company's financial year-end.

When must individuals file their income tax in 2026?

File by 15 April 2026 for paper returns or 18 April 2026 for e-Filing. Filing early helps avoid last-minute issues.

What are the 2026 GST return deadlines?

GST returns are due one month after the end of each accounting period. For quarterly filers, that means 31 January, 30 April, 31 July and 31 October 2026 for the Dec 2025, Mar, Jun and Sep 2026 periods respectively.

What happens if I miss a tax deadline in Singapore?

IRAS may impose late-filing penalties and interest charges, and continued non-compliance can lead to enforcement action. If you have missed a deadline, act promptly and seek professional advice where needed.