Get Ahead of Your 2025/26 Self-Assessment Tax Return before the January 2027 Deadline

The deadline for submitting your online 2025/26 Self-Assessment tax return is 31 January 2027. While that may still feel some way off, September is the ideal time to start gathering your information and sending it to your accountant.

Self-Assessment applies to many self-employed individuals, company directors, landlords and taxpayers with additional sources of income.

Every year, many taxpayers leave their tax return until the final weeks, or even days, before the deadline. This can create unnecessary pressure and leave little time to resolve missing information or plan for the amount of tax due.

Providing your records early makes the process smoother and gives you greater certainty over your tax position and cash flow.

Why provide your information early?

1. More time to prepare

Gathering your records now means there is plenty of time to identify and obtain anything that may be missing. It also gives us time to review your information carefully and address any queries without the pressure of a rapidly approaching deadline.

2. Better financial planning

Completing your return early means you will know your tax liability sooner, helping you budget and manage your cash flow effectively.

Importantly, submitting your return early does not mean you have to pay your tax early. Any tax due for the 2025/26 tax year will generally still be payable by 31 January 2027.

3. Fewer last-minute surprises

Your final tax bill may be higher or lower than expected, particularly if your income or circumstances changed during the year. Knowing the amount in advance gives you more time to prepare and consider your options.

4. Reduced risk of penalties

Missing the filing deadline can result in an initial £100 late-filing penalty, with further penalties applying if the return remains outstanding. Providing your information early helps ensure there is sufficient time to prepare and submit your return before the deadline.

5. Greater peace of mind

January is often a busy month, both personally and professionally. Dealing with your Self-Assessment tax return now means one less task hanging over you as the deadline approaches.

Send us your information now

Although the filing deadline is not until 31 January 2027, there is no need to wait. The sooner we receive your complete records, the sooner we can prepare your return, confirm your tax position and help you plan for any payment due.

If you would like support with preparing your 2025/26 Self-Assessment tax return, contact our team today. We’ll help you understand your tax position and avoid last-minute stress. Please contact us at enquiries@teamjs.co.uk.