The tax year is from 6 April to 5 April the following year.
You’ll need to send a tax return if, in the last tax year:
- you were self-employed
- your untaxed income was £2,500 or more, eg from rent or investments - contact the helpline if your untaxed income is less
- your work expenses were £2,500 or more
- your savings or investment income was £10,000 or more before tax
- you made profits from selling things like shares, a second home or other chargeable assets and need to pay Capital Gains Tax
- you were a company director (unless it’s for a non-profit organisation, eg a charity, and you don’t get any pay or benefits, like travel expenses or a company car)
- your income was over £50,000 and you or your partner got Child Benefit
- you had income from abroad that you need to pay tax on
- you lived abroad and had a UK income
- your income was over £100,000
There are other reasons you may need to send a return - you can check whether you need to. You usually won’t need to send a return if your only income is from your wages or pension.
If you get a letter from HMRC telling you send a return, you must send it - even if you don’t have any tax to pay.
Registering for Self Assessment
You need to register if you didn’t send a tax return last year. How you do this depends on whether:
If you’re new to Self Assessment, you’ll need to keep records (eg bank statements or receipts) so you can fill in your tax return correctly.