TAX GUIDE

Tax Filing Deadlines by Country 2026

Daniel · CountryTaxCalc Updated April 2026
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KEY INSIGHT
Key 2026 deadlines: USA April 15 (June 15 if abroad), UK January 31 (for 2024/25 tax year), Germany July 31 (Feb 28 with tax advisor), France May 22-June 5 (by department). Most countries offer extensions. US expats get automatic 2-month extension to June 15.
At a glance

Key Facts

USA
April 15, 2026 (June 15 for expats, Oct 15 with extension)
UK
January 31, 2026 (for 2024/25 tax year)
Germany
July 31, 2026 (Feb 28, 2027 with tax advisor)
Australia
October 31, 2026 (for 2025/26 year ending June 30)
Most Common
Calendar year (Jan-Dec), deadline 3-6 months after
Introduction

Missing tax filing deadlines triggers penalties, interest, and compliance problems. Different countries use different tax years and have varying deadline structures.

This guide lists 2026 tax filing deadlines for major countries, including extension options and expat considerations.

Section 01

North America

United States

DeadlineApplies ToNotes
April 15, 2026All US taxpayers2025 tax year
June 15, 2026US citizens/residents abroadAutomatic 2-month extension
October 15, 2026With Form 4868Extension to file (not pay)

Canada

DeadlineApplies To
April 30, 2026Employees
June 15, 2026Self-employed (but payment due April 30)
Section 02

United Kingdom & Ireland

United Kingdom

DeadlineTax YearType
October 31, 20252024/25Paper returns
January 31, 20262024/25Online returns
January 31, 20262024/25Payment due

Ireland

DeadlineApplies To
October 31, 2026Paper returns
November 14, 2026ROS online (extended)
Section 03

Western Europe

Germany

DeadlineApplies To
July 31, 2026Self-filed returns (2025 tax year)
February 28, 2027With registered tax advisor (Steuerberater)

France

Netherlands

Belgium

Switzerland

Section 04

Southern & Eastern Europe

Spain

Italy

Portugal

Poland

Czech Republic

Hungary

Romania

Section 05

Asia-Pacific

Australia

DeadlineApplies To
October 31, 2026Self-lodged returns (2025/26 year)
May 15, 2027With registered tax agent

New Zealand

Japan

Singapore

Hong Kong

UAE

Section 06

Expat & Multi-Country Situations

US Expats

UK Expats

Multi-Country Filing

Late Filing Tips

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FAQ

Frequently Asked Questions

What is the US tax filing deadline for 2026?

April 15, 2026 for 2025 tax year returns. US citizens and residents living abroad get automatic extension to June 15. File Form 4868 for extension to October 15. Payment is still due April 15—extensions are for filing, not payment.

When is the UK Self Assessment deadline?

January 31, 2026 for the 2024/25 tax year (ended April 5, 2025) if filing online. Paper returns are due October 31, 2025. Payment is also due January 31. Payments on Account for 2025/26 are due January 31 and July 31, 2026.

Do I get an extension as a US expat?

Yes. If you're living outside the US and your tax home is abroad on April 15, you automatically get until June 15 to file (attach statement explaining). For further extension to October 15, file Form 4868. Note: payment is still due April 15—interest accrues on late payments.

What happens if I miss the deadline?

Penalties vary by country. USA: 5% of unpaid tax per month for late filing (max 25%) plus interest. UK: £100 automatic penalty, increasing over time. Most countries: file anyway—late filing is better than no filing, and penalties are usually based on tax owed.

Which countries have calendar tax years?

Most countries use calendar years (January-December): USA, Canada, Germany, France, Spain, Italy, most of Europe, Japan, Singapore. Exceptions: UK (April-April), Australia (July-June), New Zealand (April-March), Hong Kong (April-March).
Disclaimer:Tax filing deadlines change and may shift when falling on weekends or holidays. This guide provides 2026 calendar deadlines—verify exact dates with official tax authorities. Extensions and exceptions may apply to specific circumstances.
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