Whether you're a sole trader, landlord, company director, or have multiple income streams, we prepare and file your self-assessment tax return accurately and on time — and make sure you're not paying a penny more than necessary.
Straightforward returns for employees with one income source. More complex returns priced based on your circumstances. No surprises.
Get a Quote| Date | What is due |
|---|---|
| 5 October | Register for Self Assessment if you have new untaxed income from the previous tax year |
| 31 October | Paper return deadline |
| 31 January | Online return deadline, balancing payment and first payment on account |
| 31 July | Second payment on account |
The 2025/26 return, which covers 6 April 2025 to 5 April 2026, is due online by 31 January 2027. Miss it and there is an automatic £100 penalty. After three months, £10 a day applies for up to 90 days. At six and twelve months there is a further penalty of the greater of 5% of the tax due or £300. Late payment adds interest and further 5% penalties at 30 days, six months and twelve months.
If your Self Assessment bill is over £1,000 and less than 80% of your income tax was collected at source, HMRC asks you to pay next year's bill in advance, in two equal instalments.
If your self-employment and property income combined is over £50,000, Making Tax Digital for Income Tax applies from April 2026. The threshold drops to £30,000 from April 2027 and £20,000 from April 2028. Quarterly updates then replace the single annual return, so it is worth planning early. See our guide to Making Tax Digital in plain English.
Sources: GOV.UK: Self Assessment tax returns, GOV.UK: Income Tax rates.
You need to file if you are self-employed, a company director, a landlord, earn over £100,000, have untaxed savings or investment income, or receive child benefit with income over £60,000.
The online self-assessment deadline is 31 January following the end of the tax year. The 2025/26 return is due 31 January 2027. Late filing incurs an automatic £100 penalty.
We charge a fixed fee agreed upfront, based on the complexity of your income. There are no hourly charges or surprise bills. Contact us for a personalised quote.
They are advance payments towards next year's tax bill, each equal to half of the previous year's Self Assessment liability. They are due on 31 January and 31 July, and apply when your bill is over £1,000 and less than 80% of your tax was collected at source.
An automatic £100 penalty applies the day after the deadline. After three months, £10 a day accrues for up to 90 days. At six and twelve months there is a further penalty of 5% of the tax due or £300, whichever is greater.
Sole traders and landlords with combined self-employment and property income over £50,000 join from April 2026, over £30,000 from April 2027 and over £20,000 from April 2028. Salary and dividends do not count towards the threshold.