On Incorrect Tax Code?

If you believe your tax code is wrong you should contact HMRC who will issue your employer with a revised tax code as required. This can be done by phone – 0300 200 3300 – or on-line . ... Under Real Time PAYE Information (RTI) employers report pay and tax details to HMRC each time you are paid.

Will I get a refund if my tax code is wrong?

If you think your tax code is incorrect, you should contact HMRC during the tax year. HMRC may then be able to issue a revised tax code to your employer. Once the revised code is received, your employer can then refund to you any tax overpaid.

Can I update my tax code online?

Change tax code online

You may need to contact HMRC or change your tax code online if you think it is wrong. Visit the Income Tax: General Enquiries page or inform them of any changes using the Income Tax checking tool.