Self Assessment Accountant UK | Tax Return Help & Filing
Need a Self Assessment accountant to prepare and file your UK tax return?
Accounting People supports sole traders, landlords, company directors, investors and individuals with preparing, reviewing and submitting Self Assessment returns to HMRC.
We can review your income and expenses, consider relevant allowances and reliefs, explain your tax calculation and, where authorised, submit the completed return to HMRC.
For the 2025/26 tax year, the normal online Self Assessment filing deadline is 31 January 2027.
• Preparation and HMRC submission where authorised
• Clear explanation of your tax position and deadlines
• Team includes ACCA-qualified accountants
We support sole traders, landlords, company directors and individuals who need help with Self Assessment accounting and tax return filing.
Late filing penalties can start with an initial £100 penalty, so it is important to understand your filing deadline.
Who We Help With Self Assessment Tax Returns
We help a wide range of individuals who need to complete a Self Assessment tax return, including sole traders, landlords, company directors, partners and people with untaxed or additional income.
HMRC says you must send a return in certain circumstances, including where you were self-employed as a sole trader with more than £1,000 of gross trading income, were a partner in a business partnership or had certain tax liabilities that must be reported through Self Assessment.
You may also need to file if you receive untaxed income from sources such as property, dividends, savings, foreign income, tips or commission.
Company directors do not automatically need to file a Self Assessment return simply because they are directors. A return may still be required where, for example, they receive dividends or other untaxed income, or where another Self Assessment requirement applies.
If you are unsure whether you need to file, we can review your circumstances and explain the next steps.
Why Use an Accountant for Self Assessment?
Self Assessment can involve several income sources, supplementary pages, allowable expenses, reliefs and tax calculations. Mistakes or missing information can result in an incorrect return or additional questions from HMRC.
An accountant can review the information you provide, prepare the relevant parts of the return and explain the resulting tax calculation before submission.
• Review before submission
• Relevant allowances and reliefs considered
• Clear explanation of tax due and payment deadlines
What Does a Self Assessment Accountant Do?
A Self Assessment accountant can help organise the information needed for your tax return, identify the relevant sections of the return, review allowable expenses and reliefs, calculate the tax position and prepare the return for submission.
Where you authorise us to act, Accounting People can submit the completed return to HMRC on your behalf.
We can also explain what tax is due, when it must be paid and what information you should retain for your records.
How Our Self Assessment Tax Services Work
We keep the Self Assessment process organised from the start. Whether you are completing a return for self-employment, property income, dividends or another relevant income source, we collect the information needed, prepare the return and explain the tax calculation before submission. You can also read our guide to the Self Assessment filing deadline.
Why Choose Accounting People for Your Self Assessment?
Choosing an accountant for Self Assessment is about more than meeting a deadline. Your return should reflect the information provided, relevant income sources and applicable allowances and reliefs, with the resulting tax calculation explained clearly.
Accounting People supports individuals, sole traders, landlords, company directors and other taxpayers across the UK with Self Assessment preparation and filing.
If you need support beyond your tax return, you can also explore our wider Tax Services for personal and business tax matters.
Team Includes ACCA-Qualified Accountants
Our team includes ACCA-qualified accountants alongside experienced accounting professionals who support clients with Self Assessment and other accounting and tax requirements.
Clear Scope and Pricing
You’ll know what’s included from the start, with no hidden charges or last-minute surprises.
HMRC Submission Where Authorised
Where we are authorised to act, we can submit your completed Self Assessment return to HMRC and explain the resulting filing and payment position.
Clear Explanations, No Jargon
We explain your tax calculation, relevant deadlines and next steps clearly, without unnecessary technical language.
What’s Included
What You Get With Our Self Assessment Service
What Our Clients Say
Helpful Self Assessment Guides
Explore practical guides covering Self Assessment registration, filing deadlines, HMRC online access and tax returns for sole traders.
New Self-Assessment Registration Service: What You Need to Know for 2025/26
HMRC has launched an improved online Self-Assessment registration service, designed
HMRC Personal Tax Account: Sign In, Login & What You Can Do
Your HMRC Personal Tax Account is the online service for
Tax Return Deadline UK 2026/27: Key Self Assessment Dates
The main UK Self Assessment tax return deadline for the
Self Assessment Tax Returns for Sole Traders
If you work for yourself as a sole trader, you
Get Help With Your Self Assessment Tax Return
Speak to our accounting team and understand your next steps.
Frequently Asked Questions
Whether you need to file depends on your circumstances. Common reasons include having more than £1,000 of gross sole-trader income, being a partner in a business partnership, having Capital Gains Tax to pay or receiving certain untaxed income such as property income, dividends, savings interest or foreign income. HMRC also has an online checker if you are unsure.
No. Being a company director does not by itself mean that you automatically need to file a Self Assessment tax return. A director may still need to file because of dividends, other untaxed income or another Self Assessment requirement.
For the 2025/26 tax year, HMRC must normally receive a paper tax return by 31 October 2026. The online filing deadline is 31 January 2027, and tax due through Self Assessment is generally payable by 31 January 2027. Different deadlines can apply in some circumstances.
The information required depends on your circumstances. It may include employment documents, self-employment income and expenses, property income records, dividend information, bank interest, pension contributions, Gift Aid information, foreign income and details of relevant gains or other taxable income.
For a full checklist, see our guide to the records you need for Self Assessment.
The cost depends on the complexity of your tax return, the number of income sources involved, the quality of your records and whether additional tax advice is required.
Accounting People provides clear scope and pricing before work begins, so you know what is included before proceeding.
Yes. Where you have authorised us to act and we have the information needed to complete the return, we can prepare the return for your approval and submit it to HMRC on your behalf.
An initial £100 late-filing penalty can apply if a required return is submitted after the deadline. Further penalties can arise if the return remains outstanding, and separate penalties and interest may apply where tax is paid late.
Get Help With Your Self Assessment Tax Return
Based in Stanmore and supporting Self Assessment clients across the UK.