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The most important HMRC contact numbers

We've updated this guide on 12th February 2021

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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