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Income tax assessments

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 income tax assessment
  • a request for more information – 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 your income tax assessment 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.

Income tax assessment 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 - Income tax assessments sent

We send assessments 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 income tax assessment, you may receive yours after July.