Online tax calculator

HMRC-recognised tax calculator

Calculate and submit your income tax bill online

New tax calculator for the 2015-2016 tax year

We're working with SimpleTax to bring you a new online calculator allowing Which? members to calculate their tax bill and submit it directly to HMRC at no extra cost - £18 for non-members.

  • Easy to use and jargon-free personal tax calculator
  • Safe and secure - protected by 256-bit encryption
  • A simple and quick way to calculate your tax bill
  • Officially recognised by HMRC
  • Submit your tax return directly to HMRC as part of your Which? membership package - £18 for non-members

Already a Which? member?

If you're an existing Which? member, or have just signed up for a trial, you can now calculate your tax bill and submit to HMRC as part of your membership package.

Use the calculator now

If you're not a Which? member, you can still use the tool, but you'll need to pay a charge of £18 if you want to submit your completed tax return to HMRC.

Access the tool as a non Which? member

Do I need to complete a self-assessment tax return?

If HMRC has asked you to complete a self-assessment return for 2015-2016, you must complete it before 31 January 2017 or face a £100 fine. Some people (those who are self-employed, for example) need to complete a tax return every year; others are sent one because they have untaxed income (often from property). If your affairs are complex, you may want to consider receiving independent specialist advice in respect of your tax submission. On some occasions, HMRC may require a paper submission of your tax return - it’s your responsibility to find out if this is the case.

Disclaimer

Use of the service is governed by the terms and conditions of SimpleTax. Although the publisher endeavours to make sure the information in this calculator is accurate and up-to-date, nothing in it constitutes taxation advice by Which? and should never be construed as such. You should consult a qualified tax adviser if taxation advice is required. Which? Limited does not accept any liability for any loss or damage suffered as a consequence of relying on any information contained in this guide. Which? will receive a referral fee for any user that pays the £18 fee to submit a tax return using the SimpleTax calculator. You can calculate and submit your tax return for free on the HMRC website. Limited information will be shared between Which? And SimpleTax in accordance with the respective privacy policies.

Old tax calculator

Our old tax calculator is being phased out. If you've previously registered for and used the old tax calculator, you can still access your account, retrieve and amend your information, but no new accounts can be created. The calculator is no longer updated and will be permanently removed in March 2017. Access your old account.