The most important HMRC contact numbers

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.