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The most important HMRC contact numbers

  • 1 min read
  • Last updated 30 May 2022

HMRC has over 130 phone lines, but most of them are not relevant for everyday taxpayers.

This is a list of the most important ones.

For questions about your Self Assessment:

  • Inside UK: 0300 200 3310
  • Outside UK: +44 161 931 9070

You’ll need your National Insurance and UTR numbers.

For questions about Income Tax, Capital Gains Tax, and most tax reliefs

  • Inside UK: 0300 200 3300
  • Outside UK: +44 135 535 9022

You’ll probably need your National Insurance and UTR numbers.

For questions about CIS registration and rebates

  • Inside UK: 0300 200 3210
  • Outside UK: +44 161 930 8706

If you’re not sure if you’re employed or self-employed

  • Only from inside the UK: 0300 123 2326

For questions about National Insurance

  • Inside UK: 0300 200 3500
  • Outside UK: + 44 191 203 7010

If you need HMRC online technical support

  • Inside UK: 0300 200 3600
  • Outside UK: +44 161 930 8445

For other situations

For all other special situations (for example, child benefit, tax credits, non-resident landlord taxes, etc.), check this complete (130!) list of phone numbers on HMRC’s website.

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