Self-Assessment Tax Return Service UK: Professional Filing from £300 inc VAT

Self-assessment tax returns from £300 inc VAT

Need help completing your UK self-assessment tax return? Accountant Search can match you with an experienced accountant who can prepare and file your return for a clear price of £300 including VAT per return.

Whether you are self-employed, a company director, a landlord, an investor or an individual with additional income, a professional self-assessment accountant in the UK can help you report your income correctly, claim eligible expenses and meet HMRC deadlines.

Our service is designed to be simple and reassuring. You provide the relevant information, your matched accountant reviews it, prepares your return and submits it online to HMRC with your approval.

Ready to get matched with a self-assessment accountant?

Complete our SA registration form to request help with your £300 inc VAT return. Tick the Self-Assessment option so we can match you with an accountant who handles tax returns like yours.

You can also find an accountant or learn more about our self-assessment accountant service.

What does self-assessment mean?

Self Assessment is HMRC’s process for collecting Income Tax that is not automatically deducted through PAYE.

Most employees only pay tax through their payroll. However, you may need to complete a tax return if you receive income from self-employment, property, investments or other sources that are not fully taxed at source.

A self-assessment tax return covers the tax year from 6 April to the following 5 April. It tells HMRC about your income, allowable expenses, tax reliefs and other information needed to calculate your tax bill.

You may be able to complete the return yourself, but the rules can become difficult when you have several income sources, business expenses, dividends, property income or payments on account to consider.

Who needs to submit a self-assessment tax return?

You may need to submit a return if you:

• Are self-employed and your gross trading income is more than £1,000 in a tax year

• Are a partner in a business partnership

• Receive income from letting property

• Receive dividends or other income that is not fully taxed at source

• Have foreign income or overseas investments

• Have capital gains that need to be reported

• Receive a high-income Child Benefit charge

• Are a company director who has income or benefits that need to be declared

• Have taxable savings or investment income

• Need to claim certain tax reliefs

• Have been asked by HMRC to complete a return

Being a director of a limited company does not automatically mean that you need to file a personal tax return. However, you may need to report dividends, benefits, property income or other personal income separately from your company’s accounts and Corporation Tax return.

If you are unsure whether you need to file, it is safer to get advice early. HMRC may issue penalties if a return is required but is not submitted on time.

Need help working out if you should file?

If you think you may need to submit a return, complete the SA form here and tick Self-Assessment. We will use your details to match you with an accountant who can confirm what is required and quote the standard £300 inc VAT fee for a typical return.

Key self-assessment deadlines

The deadlines below apply in most standard cases. Your accountant can confirm the dates that apply to your circumstances.

5 October: register for Self Assessment

If you need to submit a tax return for the first time, you generally need to tell HMRC by 5 October after the end of the relevant tax year.

For example, if you first needed to file for the 2025–26 tax year, you would normally need to register by 5 October 2026.

If you are unsure about registration, complete the SA registration form and tick Self-Assessment so we can match you with an accountant who can discuss the registration steps with you.

31 October: paper tax return deadline

Paper tax returns usually need to reach HMRC by 31 October following the end of the tax year.

Most people choose to file online because the online deadline is later and the calculation is completed through HMRC’s system. However, filing online does not remove the need to pay tax by the payment deadline.

31 January: online filing and payment deadline

The main deadline is 31 January.

By this date, HMRC must usually have received:

• Your online self-assessment tax return

• Any tax owed for the previous tax year

• Your first payment on account for the following tax year, if payments on account apply

For the 2025–26 tax year, which ended on 5 April 2026, the online filing and payment deadline is normally 31 January 2027.

You can check the latest dates on the GOV.UK Self Assessment deadlines page.

31 July: second payment on account

If you make payments on account, your second instalment is normally due on 31 July.

Payments on account are advance payments towards your next tax bill. They are commonly required when your previous tax bill is above a certain level and most of your tax was not already collected at source.

The amount can be surprising if you have not planned for it. Your accountant can explain how payments on account work and help you budget for both January and July.

What is included in our £300 tax return service?

Our self-assessment tax return service costs £300 inc VAT per return.

The service generally includes:

1. Reviewing your information

Your accountant will ask for the information needed to prepare your return. This may include details of:

• Employment income

• Self-employed income and expenses

• Dividends

• Property income

• Pension contributions

• Bank interest

• Capital gains

• Benefits and other taxable income

• Tax already paid

2. Checking allowable expenses

If you are self-employed or run a growing business, your accountant can review your costs and identify expenses that may be allowable for tax purposes.

This could include relevant business insurance, professional subscriptions, software, equipment, travel and certain home-working costs. Expenses must be genuine, business-related and supported by appropriate records.

3. Calculating your tax position

Your accountant will calculate the information needed for your return and explain the likely tax due. They can also highlight whether payments on account may apply.

The calculation is based on the information you provide. It is important to give complete and accurate records, including income that may not seem significant.

4. Preparing and filing your return

Your accountant will prepare the return for your review and approval before filing it online with HMRC.

This provides a useful opportunity to ask questions and correct missing or inaccurate information before submission.

5. Explaining what happens next

After filing, your accountant can explain the payment deadline, your tax calculation and any future actions you need to take.

The £300 service covers preparation and filing of one standard return. More complex work, such as tax investigations, detailed capital gains calculations, complicated property structures or extensive historic corrections, may require a separate quote.

Get started with the SA form

If you want to move forward, complete the SA registration form and select Self-Assessment. This is the quickest way to send us your details and get matched with an accountant for your £300 inc VAT return.

Can an accountant submit your self-assessment online?

Yes. With your permission and the appropriate HMRC authorisation, an accountant can prepare and submit your self-assessment online on your behalf.

This does not remove your responsibility to provide accurate information or pay the tax due. It does mean that a professional can manage the preparation process, check the figures and help you avoid common filing mistakes.

If you are searching for a tax return service UK customers can use remotely, Accountant Search can help match you with an accountant suited to your situation.

Submit the SA form to get matched

If you are ready to proceed, complete the SA form and tick the Self-Assessment option. We will use your enquiry to connect you with an accountant who can handle your return for £300 inc VAT, subject to it being a standard return.

Making Tax Digital for Income Tax Self Assessment

Making Tax Digital (MTD) is changing how some sole traders and landlords report income to HMRC.

From 6 April 2026, MTD for Income Tax Self Assessment applies to many sole traders and landlords with qualifying income above £50,000, subject to the relevant rules and exemptions.

Those affected may need to:

• Keep digital records

• Use MTD-compatible software

• Send quarterly updates of income and expenses

• Complete a final declaration after the end of the tax year

The first quarterly update for many people covers 6 April to 5 July 2026 and is due by 7 August 2026.

MTD does not remove the need to plan for the traditional tax payment dates. 31 January and 31 July remain important payment dates, particularly where payments on account apply.

MTD rules can be difficult to assess if you have both business and property income, or if you operate through more than one business. An accountant can help you understand whether the rules apply and what systems you need.

How to get started

Getting help with your tax return is straightforward:

1. Complete the SA registration form.

2. Tick the new Self-Assessment option and tell us about your income sources and filing requirements.

3. We match you with an accountant who can provide the relevant service.

4. Your accountant confirms the information required and the £300 inc VAT fee.

5. You provide your records securely.

6. The accountant prepares the return for your approval and files it online.

You do not need to understand every HMRC form before asking for help. Start with the information you have, such as payslips, invoices, bank statements, dividend vouchers, rental records and details of tax already paid.

The earlier you begin, the more time there is to find missing records, understand your tax bill and plan for the payment deadline.

Complete the SA form today

To get matched quickly, complete the SA form here and choose Self-Assessment. It is the main route for requesting help with a £300 inc VAT return through Accountant Search.

Get professional self-assessment help

A self-assessment tax return does not have to be stressful. For £300 including VAT per return, you can work with a professional accountant who can review your information, prepare your return and submit it online with your approval.

This service is suitable for individuals, company directors, self-employed professionals, landlords and growing SME owners with personal tax reporting obligations.

Start your self-assessment enquiry

Complete the Self-Assessment form and tick the Self-Assessment option to get matched with an accountant for your £300 inc VAT return.

You can also find an accountant today, or visit our self-assessment accountant page to get started.

Author: Richard Last reviewed: 13 August 2026