SELF ASSESSMENT TAX RETURNS
Self Assessment tax return from £199 + VAT
Employed with side income, shares, savings or a gain to report? We prepare and file your personal return and make sure you claim everything you are due.
- Fixed fee confirmed before we start
- PAYE from up to 3 jobs and UK dividends included
- Reliefs and allowances checked
- Filed with HMRC and confirmed in writing
Get your free quote
Tell us a little about your income and we confirm your fixed fee before any work starts.
Quick answer
What is a Self Assessment tax return?
Self Assessment is how HMRC collects Income Tax on income that is not taxed at source. You report your income on the SA100 tax return and pay what you owe by 31 January. We prepare and file Self Assessment returns for individuals from £199 + VAT.
What is included
- Registration for Self Assessment and your UTR
- SA100 and the supplementary pages you need
- Employment, self-employment, property, savings and dividends included
- Reliefs such as pension contributions and Gift Aid claimed
- High Income Child Benefit Charge calculated
- Your tax bill and payments on account explained
Who needs one
- Self-employed people and sole traders
- Landlords with rental income
- Company directors with dividend income
- Anyone earning over £100,000
- Child Benefit claimants with income over £60,000
- People with untaxed income of £2,500 or more
Plan ahead
Key dates, documents and mistakes to avoid
Key dates
- 5 October: register for Self Assessment if you started trading or earning untaxed income in the previous tax year
- 31 October: paper return deadline
- 31 January: online return deadline and balancing payment
- 31 January and 31 July: payments on account
Documents we need
- UTR, National Insurance number and Government Gateway details
- P60, P45 or P11D forms
- Interest and dividend statements
- Pension and Gift Aid details
- Self-employment and rental records
- Child Benefit details
Common mistakes
- Missing the 5 October registration deadline
- Not declaring all income
- Forgetting reliefs such as Gift Aid and pension contributions
- Overlooking the High Income Child Benefit Charge
- Entering figures on the wrong pages
Available UK-wide
Your Self Assessment tax return, handled online wherever you are
We prepare and file every Self Assessment tax return online, so you can work with us from anywhere in the UK without visiting an office. Cheap Tax Returns is part of Accotax, a London firm of qualified accountants on the ICAEW approved employers list.
- 100% online, no office visits
- Fixed fee confirmed before we start
- Prepared by qualified accountants (ICAEW, ACCA and AAT)
Popular locations
Clients in these cities and across England, Scotland, Wales and Northern Ireland trust us with their returns.
Related reading and tools
Reviewed by qualified accountants in October 2026. Deadlines, rates and allowances are checked against GOV.UK each tax year.
Authorised and regulated
Is Cheap Tax Returns authorised and regulated? Yes.
Your return is prepared by qualified UK accountants holding qualifications from the leading accountancy bodies: ICAEW, ACCA and AAT. We are also on the ICAEW approved employers list, so you can file with confidence.
Regulated by the professional bodies. Reviewed by qualified accountants. Part of Accotax.
WHO FILES
Who needs a Self Assessment return
Employees with extra income
A salary plus side income, tips or untaxed earnings that PAYE does not cover.
Investors
Dividends, savings interest above your allowances, or income from overseas.
People with gains
Selling shares, crypto or other assets at a profit that must be reported.
High earners
Higher incomes can trigger a return or charges such as the High Income Child Benefit Charge.
WHY CHOOSE US
What your fixed fee covers
A clear price for the complete personal return.
- Preparation of your full Self Assessment return
- Review of every relief and allowance
- PAYE income from up to 3 jobs included
- UK dividends included; foreign dividends £30 + VAT
- Filing with HMRC and confirmation
- Support afterwards for HMRC queries
PART OF ACCOTAX
Reviewed by real Accotax clients
Cheap Tax Returns is part of Accotax, so these are the Google reviews left for the accountants who prepare your return.
QUESTIONS
Self Assessment questions
People with income HMRC cannot collect through PAYE, such as self-employed profits, rental income, some dividends and savings, and gains from selling assets. If in doubt, ask us.
If you are new to Self Assessment, you must register with HMRC by 5 October after the end of the tax year. Your UTR then usually arrives by post in around 10 working days.
The paper deadline is 31 October and the online deadline is 31 January, which is also when your balancing payment is due. The 2025/26 online deadline is 31 January 2027.
Yes. You can generally amend a return within 12 months of the 31 January filing deadline. We can prepare the correction for you.
A £100 penalty applies straight away, even if you owe no tax, and further penalties build up the longer the return is late. Interest is also charged on unpaid tax.
You usually must file if you are self-employed with income over £1,000, have rental income, have untaxed income of £2,500 or more, earn over £100,000, or have to pay the High Income Child Benefit Charge.
A Unique Taxpayer Reference is a 10-digit number HMRC issues when you register for Self Assessment. It normally arrives by post within about 10 working days.
Register by 5 October. File a paper return by 31 October or an online return by 31 January. Your tax is due by 31 January, with a second payment on account on 31 July.
Pay online, by bank transfer or by Direct Debit, using your UTR as the payment reference. Payment is due by 31 January.
At least five years after the 31 January filing deadline if you are self-employed or let property, and at least 22 months after the end of the tax year otherwise.
From 6 April 2026, self-employed people and landlords with qualifying income over £50,000 must keep digital records and send quarterly updates. The threshold falls to £30,000 from April 2027 and £20,000 from April 2028.
Get your Self Assessment fee today
Tell us about your income and we will confirm your fixed price before any work starts.