If you are self-employed, a landlord, a company director, or earn income not taxed at source in Surrey, you are likely required to complete a self-assessment tax return for 2025/26. With the online filing deadline of 31 January 2027 approaching, now is the time to get organised.
Do you need to file a self-assessment return?
You need to register if, in 2025/26, you:
- Were self-employed and earned more than £1,000 before expenses
- Were a company director
- Had untaxed income — rental income, investment income or tips
- Earned more than £150,000 in the year
- Received Child Benefit and either you or your partner earned above £60,000
Key dates for 2025/26
- 5 October 2026: deadline to register if new to self-assessment
- 31 October 2026: deadline for paper returns
- 31 January 2027: deadline for online returns and payment of tax owed
- 31 July 2027: second payment on account (if applicable)
What information do you need?
- Your Unique Taxpayer Reference (UTR)
- Records of all self-employment income and allowable expenses
- Rental income figures and associated expenses
- P60 and P11D forms if you were also employed
- Details of any capital gains and pension contributions
Common mistakes to avoid
- Missing the registration deadline (5 October) if filing for the first time
- Forgetting payments on account — these can come as an unwelcome surprise
- Not claiming all allowable expenses
- Failing to declare all sources of income
Getting help
Many Surrey residents find that working with an accountant takes the process completely off their plate — and often results in a lower tax bill than they would have calculated themselves.
Talk to us about your situation
Our chartered accountants work with small businesses, landlords and contractors across Surrey, Kent and Sussex. Get in touch for a free initial consultation.
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