Your self-assessment tax return. Done.

No headaches, no hassle, just peace of mind that your personal tax return is being handled by us.

From £110 + VAT per year

Candice Chandler Tax Manager

Life’s too short to worry about your HMRC self-assessment tax return

Engage Boox to prepare and file your HMRC self-assessment tax return. You’ll benefit from the wealth of accounting experience and expertise of our personal tax team. No matter how simple or complex your tax affairs, we’ll help and advise you so that you meet your HMRC self-assessment tax deadlines and avoid unnecessary mistakes and penalties. Get in touch with our self-assessment tax return team today.

Do I need to do a self-assessment?

  • Director of a limited company
  • Self-employed
  • Employed and earning more than £100,000
  • Earning more than £50,000 and receiving child benefit
  • Receiving property income
  • Earning income that hasn’t been taxed
Get an instant estimate

File your return earlier and save

The eariler you ask us to deal with your self-assessment, the less you’ll pay.

Every year thousands of taxpayers leave filing their tax return to the last minute which is why our pricing for this service is staggered throughout the tax year.

April - August

from £110 + VAT

September - November

from £130 + VAT


from £145 + VAT


from £165 + VAT

Don’t bury your
head in the sand

We are currently completing self-assessments for tax year April 6th 2016 to April 5th 2017. The deadline for your online tax return and for payment of tax is January 31st 2018.

HMRC’s penalty for late filing starts at £100 as soon as your self-assessment is overdue. This soon mounts up – the longer it takes to resolve a late submission, the more you will owe.

If you are already in difficulties with HMRC over your personal tax we’ll go the extra mile to give you the help and advice you need to get back on track.

Get started

Our streamlined process

You need to complete a simple questionnaire and engagement form.
Download forms
Our personal tax team will get back to you with a quote, depending on the complexities of your tax affairs.
We’ll prepare your self-assessment return, then send it to you for review and approval.
We’ll file your self-assessment online directly with HMRC. HMRC will then inform you of any tax owed or rebate due.
Get started

Frequently asked questions

What is a self-assessment tax return?

Income tax is usually deducted automatically from wages, pensions and savings. Self-assessment is the system used by HMRC to collect tax from individuals and businesses with other means of income, via an online or paper tax return.

Do I need to complete a self-assessment?

You will need to complete a self-assessment if you are a director of a limited company, employed and earning over £100,000, earning over £50,000 and receiving child benefit, receiving property income or earning income that hasn’t been taxed. If you are still unsure, you can check your status using the HMRC self assessment tool. Click here

How long does the process take?

Once you submit your self-assessment questionnaire and pay the appropriate fee we will prepare your return and send it to you to review what we have done. Once you are happy we will file it directly with HMRC on your behalf. This whole process is usually completed within 14 days.

What are the self-assessment deadlines?

We are currently preparing self-assessments for tax year April 6th 2016 to April 5th 2017. This year’s deadlines are October 31st 2017 for paper submissions and January 31st 2018 for online submissions and to pay any tax due.

What are the penalties for filing a self-assessment late

As soon as your self-assessment becomes overdue you will be charged a late filing penalty of £100. The longer it takes you to resolve your late submission, the more you will be charged. Late penalties are rarely waived by HMRC, regardless of whether tax is due. Our tax team will help you to avoid these costly and unnecessary penalties.

Got a question?

Get in touch with our friendly
self-assessment tax team
today to find out how we can help
with your HMRC tax return.

Call our friendly team on 0808 168 0422 or

Request a call back

(Open 8.30am to 5.30pm Monday to Friday)

Bonnie Ewin Accounts Assistant
Bonnie Ewin Accounts Assistant

We’ll call you…

(and we mean it!)

Whether you are a freelancer, contractor, locum, sole trader, a small limited company, or a business growing at lightening speeds, Boox has a full range of accountancy solutions to suit your business needs.

Please complete the form below or call our friendly team on 0808 168 0422.

(Open 8.30am to 5.30pm Monday to Friday)

Where to find us

  • Boox
  • 2nd Floor, The Port House,
  • Port Solent Marina,
  • Portsmouth, Hampshire,
  • PO6 4TH

Open 8:30am to 5:30pm Mondays to Fridays.

Boox is a trading division of The App Accounting Group Limited, Registered in England No. 07483229.