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Automatically issued income tax assessments and individual income tax returns - IR3s

The tax year is from 1 April to 31 March.

After the end of each tax year we'll send you one of these:

  • An automatically issued income tax assessment telling you if you have a refund or tax to pay
  • Request for more information to automatically issue your income tax assessment
  • a message to complete your individual income tax return - IR3 in myIR, or a paper copy by post.

We work out if you’ve paid the right amount of tax each year using the information we hold about your income and the tax you’ve paid.

Once you receive automatic calculation you need to check it and tell us about any changes. If it's correct and you have no tax to pay then you do not need to do anything else.

Otherwise, you need to tell us about other income you received and any expenses you need to claim.

Automatically issued income tax assessments processing timeline

1 April to mid-May – Gathering information

We’ll be gathering income and tax information from your employer, bank and investment providers.

Mid-May to end of July - Automatic calculations sent

We send automatic calculations in batches between mid-May and the end of July, so not everyone will get theirs at the same time.

After the end of July

If you’re required to provide more information, or we’re waiting for other information before we can finalise your automatic calculation, you may receive yours after July.