2024/25 Self-Assessment Tax Return: Key Deadlines and Practical Tips

Sandy Gaywood
3 days ago
2 min read

Every year, the period from October to January is crucial time for UK Self-Assessment tax returns. If you’re self-employed, rent out property, or receive investment income, this is the time to get your paperwork in order and stay ahead of the deadlines.

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1️⃣ Key Dates for the 2024/25 Tax Year

5 October 2025 – Deadline to register for Self-Assessment (if you haven’t filed before).
31 October 2025 – Deadline for submitting a paper tax return.
31 January 2026 – Final deadline for online filing and payment.

While missing the registration date rarely leads to penalties, late filing or late payment definitely will, so it’s worth getting everything sorted well before the end of January.

2️⃣ Overseas Landlords

If you’re a non-resident landlord, don’t worry if you miss the paper filing deadline on 31 October. You can still submit your return online, which automatically gives you until 31 January 2026 to file.

3️⃣ Filing Your Return Yourself

If you’re confident with the Self-Assessment process, you can absolutely file your own return. Most individuals do this either through their HMRC Personal Tax Account, or by using HMRC approved third-party software. You’ll find a full list on the HMRC website by searching “Self-Assessment software”.

4️⃣ Who Needs to File a Self-Assessment Tax Return

You’ll normally need to file a return for the 2024/25 tax year (6 April 2024 – 5 April 2025) if any of the following apply:

You earned over £1,000 from self-employment.
You received rental income of more than £2,500 (net) or £10,000 (gross).
You earned savings or investment income (such as dividends) above £10,000.
You had other untaxed income exceeding £2,500 (for example, freelance work or commissions).
You’re subject to the High Income Child Benefit Charge.
You made capital gains over £3,000, or sold assets worth more than £50,000 in total.

5️⃣ Final Thoughts

Submitting your return early helps you avoid last-minute stress, and possible penalties. For overseas landlords, remember that online filing extends your deadline automatically. And if you’re comfortable with the process, self-filing via your tax account or third-party software is often the most cost-effective option.

If your tax affairs are more complex or you’d prefer professional assistance, feel free to get in touch. We’re always happy to help!