Tax Credits Contact Number: 0345 300 3900

Phone the Tax Credits general enquiries helpline by calling HMRC on their local-rate contact number 0345 300 3900 to discuss an existing claim.

Tax Credits General Enquiries – 0345 300 3900

Contact a dedicated Tax Credits customer service advisor by calling their main phone number 0345 300 3900 (standard rate), or dial 0345 300 3909 if you are using a Textphone. You should call this helpline to report a change in your circumstances which will affect your tax credits, for example: a change in relationship status, a child leaves home or leaves education/training, working hours fall below 30 hours per week, or if your income goes up by more than £2500. For a full list of circumstances that will affect your tax credits, which you will therefore have to report to HMRC, please visit their official online help page You should also call 0345 300 3900 to get a new claims form or for any other general enquiry.

This helpline is open 8am-8pm Monday-Friday and 8am-4pm Saturdays, and is closed on Sundays, Christmas Day, Boxing Day and New Year’s Day. Calls to 0345 phone numbers are charged at standard UK local rates from BT landlines, therefore calls will cost up to 12p per minute plus an additional call access charge. Calls to the Tax Credits office made from mobiles are normally free provided you are using free inclusive minutes that are included in your tariff, if you aren’t using these minutes then calls will cost up to 45p per minute. Please check with your mobile network provider for full details about your particular tariff.

How to complain to HMRC about your Tax Credits

Contact HMRC on their 0345 300 3900 phone number in order to make a complaint about your tax credits. Customer service advisors on this helpline will help you to resolve your complaints about how much money you are receiving through tax credits, and your general complaints about the tax credit service. You can also write to the tax credits department to make a complaint by using this official post address:

HM Revenue and Customs – Tax Credit Office (COMPLAINTS),
PR1 4AT,
United Kingdom.

If you feel your tax office complaint is unresolved after phoning or writing to HMRC, or if your complaint is very serious and involved borderline criminal activity by a member of tax office staff, then write to HMRC’s serious complaints department here:

HM Revenue and Customs,
PO Box 64353,
United Kingdom.

Tax Credit Payments – 0345 302 1429

Contact the Tax Credits Payments customer service team by calling their dedicated phone number 0345 302 1429; this helpline is charged at local call rates. You can phone this number to answer any of your tax credit payment queries, to get information on how & when to make a tax credit payment, and to inform HMRC that you are finding it difficult to repay them. This helpline is available between 8am-8pm Monday-Friday and 8am-4pm Saturday.

To send a cheque and attached payslip to HMRC in order to make a tax credit payment, please use this official postal address:

BX5 5BD,
United Kingdom.

Tax Credit Agent/Third Party Helpline –  0345 300 3943

Phone 0345 300 3943 for assistance with a tax credit query if you are an authorised agent acting on behalf of a client or loved one. This number will cost 12p per minute to call, plus a standard call access fee, if you are phoning from a BT landline. Moreover calls to this helpline will cost up to 45p per minute from mobiles, however free minutes that are included in your mobile tariff will usually contribute toward the cost of these calls – please check with your network provider for full details.

Call the Tax Credits Office from abroad – +44 2890 538 192

Phone +44 2890 538 192 to contact HMRC Tax Credits advisors from an international phone number or from an overseas mobile. This helpline can be contacted between 8am to 8pm on weekdays (Mon-Fri) and 8am to 4pm on Saturdays (closed on Sundays). Please remember that calls made to this helpline will usually cost considerably more than standard calls made within the UK and that costs will vary depending on which country you are calling from.

Important Tax Credits Contact Numbers


Phone Number

Tax Credits General Enquiries & Complaints 0345 300 3900
Tax Credits Payments 0345 302 1429
Authorised Third-Party Agent Helpline 0345 300 3943
International Tax Credits Helpline +44 2890 538 192

Alternative Tax Credits Contact Options


You can tell the Tax Credits office about a change in your circumstances that will affect your tax credits, as well as find out when your tax credits will be paid to you, online by using their official web service which can be found here:

Post your Tax Credits Forms

The Tax Credits department of HMRC (Her Majesty’s Revenue & Customs) has two official postal addresses for your tax credits claims or renewal. If you are making a new tax credit claim please post your form to their address:

HM Revenue and Customs – Tax Credit Office,
L75 1AZ,
United Kingdom.

If you are renewing you existing tax credit claim write to HMRC using this address instead:

HM Revenue and Customs – Tax Credit Office,
Comben House,
Farriers Way,
L75 1AX,
United Kingdom.