UK parents can now backdate Child Benefit claims by up to three months, with new rules expanding eligibility for those earning under £80,000.

UK parents can backdate Child Benefit claims by up to three months, HMRC and expert Martin Lewis confirm. Since April 2024, the High Income Child Benefit Charge no longer applies to those earning under £80,000—up from £50,000—allowing many previously ineligible families to claim. Even those earning between £60,000 and £80,000 may benefit after tax repayments, as the claimant receives National Insurance credits toward their State Pension. Only one parent can claim per child, and it’s typically best for the lower-earning or less likely-to-work parent to apply. Applications are online via HMRC, but prompt action is essential due to the short backdating window.