How the charge is worked out
For 2025/26, Child Benefit is £26.05 a week for the eldest child and £17.25 a week for each other child. The charge is 1% of the year's Child Benefit for every £200 of adjusted net income over £60,000, up to 100% at £80,000.
Worked example
Tom earns £70,000 and his partner claims Child Benefit for their two children: £2,251.60 for the year. Tom is £10,000 over the threshold, so the charge is 50%: £1,125.80. If Tom paid an extra £10,000 gross into his pension, his adjusted net income would drop to £60,000 and there would be no charge, plus he'd get higher rate tax relief on the contribution.
What counts as adjusted net income
- Add up salary, self-employed profit, rental profit, pensions, savings interest and dividends.
- Take off gross pension contributions paid through relief at source (your payment plus the basic rate top-up) and gross Gift Aid.
- Salary sacrifice and workplace pension deductions taken before tax are already left out of your salary figure.
Reporting it
If the charge applies and you don't pay it through your tax code, you need to register for Self Assessment by 5 October after the tax year and file a return. Here's how to register. TaxGo works out the charge for you as part of your return.