Official Child Benefit contact numbers
According to the GOV.UK Child Benefit contact page, the main HM Revenue and Customs helpline is 0300 200 3100. Use it for questions about an existing claim, missing payments, personal-detail changes or a decision you do not understand.
| How you are contacting HMRC | Official contact route | When to use it |
|---|---|---|
| Calling from the UK | 0300 200 3100 | General Child Benefit enquiries and existing claims |
| Calling from outside the UK | +44 161 210 3086 | When you cannot use the UK 0300 number |
| Relay UK | Dial 18001, followed by 0300 200 3100 | Telephone relay support for people who are deaf, hard of hearing or speech impaired |
The numbers and Relay UK instructions above are listed by GOV.UK for HMRC Child Benefit enquiries. The current GOV.UK contact page does not list the historic textphone number 0300 200 3103; use Relay UK instead.
Warning: Obtain contact details from GOV.UK rather than an advert, social-media post or unsolicited message. Never disclose an HMRC security code, bank password or full card PIN to an unexpected caller.
When to call and when to use an online service
HMRC’s online Child Benefit service may let you report a change, view proof of entitlement, update payment details or manage aspects of a claim without waiting on the telephone. GOV.UK directs claimants to the available online service before contacting the helpline.
Call if the online route does not cover your problem, you cannot access your account, a payment appears to be missing or you need HMRC to explain a claim decision. If your wider household income has changed, check whether other support could be affected through SupportFund’s benefits calculator guide.
- New claim: follow the GOV.UK Child Benefit claim process, including the HMRC app or online service where available.
- Change of circumstances: report changes promptly through the route specified by GOV.UK.
- Payment problem: check your bank statement and payment reference before calling.
- Tax question: Child Benefit and the High Income Child Benefit Charge are related but administered through different HMRC processes.
HMRC publishes current helpline availability on GOV.UK. Check the official contact page before calling because operating hours and closures can change.
What to have ready before speaking to HMRC
HMRC will normally need to confirm your identity before discussing a Child Benefit record. Preparing the relevant information can reduce the risk of an unsuccessful security check or a second call.
- Your National Insurance number.
- Your Child Benefit reference, if you have it.
- Your child’s full name and date of birth.
- Your current address and any previous address linked to the claim.
- Relevant payment dates and the bank statement reference.
- Copies of letters or notices connected with your enquiry.
Do not send original certificates or identity documents unless HMRC specifically instructs you to do so through an official channel. If a delayed payment has left you unable to cover essentials, see emergency help available to UK households while HMRC investigates.
Practical tip: Write down the date of the call, the adviser’s guidance and any action or deadline given. Keep this note with the relevant HMRC correspondence in case you need to follow up.
Writing to the Child Benefit Office
If HMRC asks you to write, GOV.UK lists the postal address as Child Benefit Office, HM Revenue and Customs, BX9 1BU, United Kingdom. Include enough information to identify the claim, but do not put bank cards, cash or unnecessary original documents in the post.
Keep a copy of your letter and any supporting evidence. Consider obtaining proof of posting where the correspondence concerns a deadline, dispute or significant change.
Postal communication is less suitable for an urgent payment problem. Use the official Child Benefit contact number where immediate clarification is needed, unless GOV.UK or an HMRC letter directs you to another team.
Check connected support, not just Child Benefit
A Child Benefit enquiry can reveal a wider household-income problem. Child Benefit is separate from Universal Credit, Council Tax Reduction and locally administered emergency help, so contacting HMRC does not automatically update those organisations.
Report relevant changes separately to each authority or department. For means-tested help, review Universal Credit eligibility and reporting rules and contact your council about Council Tax Reduction or local crisis support.
SupportFund.co.uk helps households identify emergency assistance, benefit checks and practical ways to reduce essential bills. Confirm all current benefit rates, thresholds and claim rules on GOV.UK before acting, as official guidance can change after this article’s review date.