Self Assessment Tax Return Accountants in the UK

Let us complete and file your Self Assessment tax return with HMRC. We work out every allowance and expense you can claim, tell you what you owe before you pay it, and file well ahead of the 31 January deadline.

Who we help

• Sole traders and freelancers
• Landlords with one or more rental properties
• Company directors taking dividends
• People with foreign income or capital gains
• Non-residents with UK property or income
• Anyone earning over £50,000 who now falls under Making Tax Digital for Income Tax

What is included

• Registration with HMRC and your UTR, if you are new to Self Assessment
• Full SA100 return with the right supplementary pages
• Allowable expenses and capital allowances reviewed
• Clear summary of tax due and payments on account
• Online filing and HMRC correspondence on your behalf
• Quarterly updates under Making Tax Digital for Income Tax, where required

Key Self Assessment deadlines

• 5 October: register for Self Assessment if you are new
• 31 October: paper return deadline
• 31 January: online return and balancing payment due
• 31 July: second payment on account due

Miss the online deadline and HMRC charges an automatic £100 penalty, even if you owe no tax. Further daily penalties apply after three months.

Frequently asked questions

How much does a Self Assessment accountant cost?

Fees depend on how many income sources you have, for example self-employment, rental properties or foreign income. Use our fee calculator for an estimate, or book a free call for a fixed fee.

Do I need to file a Self Assessment tax return?

You usually need to file if you are self-employed with income over £1,000, a landlord, a company director with untaxed income such as dividends, or have untaxed income such as foreign income or capital gains.

What is Making Tax Digital for Income Tax?

From April 2026, sole traders and landlords with qualifying income over £50,000 must keep digital records and send quarterly updates to HMRC. The threshold falls to £30,000 from April 2027. We set up the software and file the updates for you.

I missed the deadline. Can you help?

Yes. We can file late returns, work out what you owe and help you appeal penalties where you have a reasonable excuse.