If your tax affairs are relatively straightforward - for example, you are only entitled to basic personal allowances - you can use the HMRC calculator to work out your Income tax, Class 4 National Insurance contributions, and any interest and penalties due for tax years ended 5 April 2010 to 5 April 2023 inclusively.
HMRC Income Tax, interest and penalty calculator >>
Do you need to file a tax return?
You must send a tax return if, in the last tax year, you were:
- self-employed and earned more than £1,000
- a partner in a business partnership
You may also need to file a tax return if you have other income, such as:
- money from renting out a property
- tips and commission
- income from savings, investments and dividends
- foreign income
Tax deadlines
For the tax year 6 April 2023 to 5 April 2024:
- paper tax returns 31 October 2024
- online tax returns 31 January 2025
- payment of tax owed 31 January 2025
