When Is the Tax Return Due January 2026? 📅💼| Accountants In Essex

If you're planning ahead or filing your Self Assessment tax return UK, you’ll want to know when the deadline is for the 2024/25 tax year.

Tax Return Deadline: January 2026 🗓️

For the 2024/25 UK tax year (which runs from 6 April 2024 to 5 April 2025), the online tax return deadline is:31 January 2026 — that’s the date by which you must file your tax return online and pay any tax you owe to HMRC.

How Do HMRC Dates Work?

• 6 April 2024 – Start of 2024/25 tax year

• 5 April 2025 – End of 2024/25 tax year

• 31 October 2025 – Deadline for submitting paper tax return forms UK

• 31 January 2026 – Online filing deadline & payment due date

Missing this deadline? Watch out for late filing penalties and interest charges, even if you don’t owe tax.

Who Must File by 31 January 2026?

You need to submit your tax return and pay by the deadline if any of the following apply:

✅ You're self-employed, running a side hustle, or a sole trader

✅ You're a company director or have a limited company

✅ You have rental income or receive investment income or dividends

✅ You want to claim tax reliefs, such as working from home, mileage, or professional expenses

✅ You earned over £100,000, or received income not taxed by PAYE

✅ You’re submitting a tax return with P60 to claim overpaid tax

Want to avoid mistakes? Consider a tax return estimate earlier in the process or talk with trusted accountants in Essex for serious peace of mind.

What Happens If You Miss It?

Penalties from HMRC for missing the January 2026 deadline include:

❌ £100 immediate penalty after midnight if you file late

❌ Daily penalties if still not filed after 3 months

❌ Interest on outstanding tax

❌ Higher penalties if filing is more than 6 or 12 months late

Want to File Early? ✅

Yes! You can submit your tax return as soon as the return window opens on 6 April 2025. Advantage: you’ll get your tax return estimate early and avoid January stress.

Need Help With Your Tax Return or Taxes? | Accountants In Essex

It’s a lot to manage on your own. As trusted accountants in Essex, I support individuals, self-employed professionals, and large businesses across the UK with expert Self Assessment, tax filing, VAT, bookkeeping, and more.

📩 Contact us today to make your January 2026 deadline effortless—accurate filing, full compliance, and no penalties.

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