Self Assessment tax returns

Who must send a tax return

The tax year is from 6 April to 5 April the following year.

You must send a tax return if, in the last tax year, you were:

  • self-employed as a ‘sole trader’ and earned more than £1,000
  • a partner in a business partnership

You will not usually need to send a return if your only income is from your wages or pension. But you may need to send one if you have any other untaxed income, such as:

  • money from renting out a property
  • tips and commission
  • income from savings, investments and dividends
  • foreign income

Check if you need to send a tax return if you’re not sure.

Other reasons for sending a return

You can choose to fill in a tax return to:

  • claim some Income Tax reliefs
  • prove you’re self-employed, for example to claim Tax-Free Childcare or Maternity Allowance
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