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HMRC Authorised Tax Agent

Self Assessment
Done Right.

ACCA-qualified accountants prepare and submit your Self Assessment tax return to HMRC — accurately, on time, and with every allowable deduction claimed.

SA100Tax Return
SA103Self-Employment
SA102Employment
SA108Capital Gains
Who this is for
Sole traders & freelancers
Self-employed with trading income to declare
Company directors
Drawing salary and dividends from a limited company
High earners
PAYE employees earning over £100,000 per year
Individuals with rental income
Landlords with property income above £1,000
First-time filers
Never filed Self Assessment before and unsure where to start
Overview

What is Self Assessment and do you need to file?

Self Assessment is HMRC's system for collecting Income Tax from people whose tax isn't automatically deducted from their earnings. If you're self-employed, a company director, a landlord, or you earn over £100,000 per year, you almost certainly need to complete a Self Assessment tax return each year.

Who needs to file a Self Assessment return?

You must register for Self Assessment if you are self-employed as a sole trader and earned more than £1,000, a partner in a business partnership, a company director, earned over £100,000 in the tax year, have untaxed income such as rental income or savings interest above the Personal Savings Allowance, or received Child Benefit and either you or your partner earned over £60,000.

Key deadlines you must know

The tax year runs from 6 April to 5 April the following year. Paper returns must be filed by 31 October following the end of the tax year. Online returns must be filed by 31 January. Any tax owed must also be paid by 31 January. Missing these deadlines results in automatic penalties starting at £100, rising significantly the longer you delay.

Why use taxvista rather than filing yourself?

Self Assessment returns appear straightforward but contain many opportunities to legitimately reduce your tax bill that most people miss — allowable business expenses, pension contributions, trading allowances, loss relief, and more. An ACCA-qualified accountant will identify every relief available to your specific circumstances and ensure your return is filed correctly, avoiding costly HMRC enquiries.

What's Included

Everything handled
by a qualified accountant

SA100 Preparation
Full preparation of your Self Assessment tax return including all supplementary pages relevant to your income sources.
HMRC Submission
Electronic submission directly to HMRC on your behalf as your authorised agent. You receive confirmation of receipt.
Tax Calculation
Precise calculation of your tax liability for the year, including Income Tax, Class 4 National Insurance, and any payments on account.
Expense Review
Thorough review of all allowable expenses and deductions to ensure your tax bill is as low as legally possible.
Dedicated Accountant
Your own named ACCA-qualified accountant who handles your return personally and answers your questions.
HMRC Correspondence
If HMRC writes to you with questions about your return, we handle the response on your behalf.
Common Questions

Frequently asked

Our pricing depends on the complexity of your return — the number of income sources, whether you're self-employed, have rental income, capital gains, and so on. Contact us for a fixed-fee quote. There are no hourly rates and no hidden charges.
We'll send you a tailored document checklist once you get in touch. Typically this includes P60 or P45 from employers, self-employment income and expense records, rental income and mortgage statements, bank interest statements, and pension contribution records.
For online returns, the deadline is 31 January following the end of the tax year. So for the 2024–25 tax year (ending 5 April 2025), the deadline is 31 January 2026. Paper returns have an earlier deadline of 31 October. We recommend filing well before the deadline to avoid interest on late payments.
Yes. We can prepare and file returns for prior tax years. HMRC may charge interest and late filing penalties, but filing late is always better than not filing at all. We'll handle all the correspondence with HMRC.
If this is your first Self Assessment return, you need to register with HMRC before you can file. We can guide you through this process. You must register by 5 October following the end of the tax year in which you first need to file.
HMRC enquiries do happen, even on correctly filed returns. As your authorised agent, we handle all correspondence with HMRC on your behalf if your return is selected for review. This is included in our service.

Ready to get your
Self Assessment filed?

Get a fixed-fee quote from an ACCA-qualified accountant within 24 hours. No obligation.

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