Self Assessment tax returns
A Self Assessment tax return reports income HMRC does not already tax at source: self-employment, rental income, dividends, capital gains and foreign income. The deadline is 31 January following the end of the tax year. We prepare and file yours for a fixed fee from £149, and tell you what you owe well before it is due.
Most people do not need a tax return to be complicated. They need it done properly, on time, by someone who will spot the reliefs they are missing and tell them what they owe early enough to plan for it. That is what this service is.
What is included
Full return preparation
Every page and supplementary schedule you need: self-employment, property, capital gains, dividends, foreign income, pensions.
A relief and expense review
We go looking for what you have missed. Working-from-home, mileage, pension relief, marriage allowance, gift aid, prior-year losses.
Filed with HMRC
Submitted electronically with a confirmation receipt, long before the 31 January deadline.
Your tax position explained
A plain-English summary of what you owe, when, and whether your payments on account need adjusting.
HMRC correspondence handled
We are your registered agent, so HMRC deals with us.
Read more about self assessment
Self Assessment: your questions answered
How much does an accountant charge for a Self Assessment tax return?
Our Self Assessment returns start at £149 for a straightforward return. More involved returns, multiple properties, capital gains, foreign income, are quoted individually, always as a fixed fee agreed in writing first.
What is the Self Assessment deadline?
Online returns and payment are both due by 31 January following the end of the tax year. Paper returns are due by 31 October. The 2026/27 tax year return is due by 31 January 2028.
What is the penalty for filing late?
An automatic £100 the day you miss the deadline, even if you owe nothing. After three months it is £10 a day up to £900, then further penalties at six and twelve months, plus interest on unpaid tax.
Do I need to file a tax return?
Generally yes if you were self-employed and earned over £1,000, had untaxed income such as rent or dividends, earned over £150,000, had capital gains above the allowance, or claimed child benefit while earning over £60,000.
How long does it take?
Once we have everything, usually five working days. If you come to us in January we will still get it done, but earlier is cheaper for your nerves.