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Self Assessment

HMRC may require you to complete a self assessment tax return for various reasons, from being self employed to having job expenses when you are employed under PAYE.

On this page you will find information about:

HMRC Self Assessment Helpline Phone Numbers

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Self Assessment Payment Helpline Phone Numbers

The Self Assessment payment helpline is specifically for people who cannot pay their tax bill on time.

  • Self Assessment Payment Helpline:
    0845 366 1204

  • Outside the UK:
    +44 12 7420 4880

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HMRC Self Assessment Office Opening Times

  • Office opening times are:

    Monday to Friday, 8.00 am to 8.00 pm
    Saturday, 8.00 am to 4.00 pm
    Sunday, Closed
    Closed Christmas Day, Boxing Day and New Year’s Day and Bank Holidays.

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HMRC Self Assessment Office Address

  • The HMRC Self Assessment main postal address is:

    HM Revenue & Customs
    Self Assessment
    PO Box 4000
    Cardiff
    CF14 8HR

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For further Tax Contacts, please follow the links below:

More Info

Tax Refunds

If you are new to self assessment and need to register for online services or have completed a tax return for many years and have a query, you can find the phone numbers you need to contact HMRC here.