Child Benefit Calculator
Calculate your Child Benefit entitlement for 2025/26, see how the High Income Child Benefit Charge affects your family, and decide whether to claim or opt out.
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How to Use This Calculator
Benefit Amount tab
The default tab. Enter your number of children and their ages. The calculator shows your weekly Child Benefit rate, monthly equivalent, annual total, and a projection of total benefit until each child reaches age 16, 18, or 20. Enable Guardian's Allowance in "More options" if applicable.
HICBC (High Income Child Benefit Charge) tab
Enter the higher earner's income from all sources — employment, self-employment, rental, dividends, and pension. See the exact HICBC percentage, tax charge, and net benefit after clawback. Expand "More options" to add pension contributions and salary sacrifice that reduce your adjusted net income.
Opt Out or Claim? tab
The decision tab. Enter your income, number of children, and whether your partner works. See a side-by-side comparison of claiming and paying HICBC vs opting out entirely vs claiming but opting out of payments. The calculator recommends the best option for your family, factoring in NI credits for State Pension.
Share your result
Every input is encoded in the URL. Click Share to send your exact scenario to a partner, accountant, or financial adviser.
The Formula
Child Benefit rates for 2025/26 (from April 2025):
Annual Benefit = £1,354.60 (eldest) + £897.00 × (additional children)
HICBC applies if higher earner's adjusted net income > £60,000:
HICBC % = (Income − £60,000) ÷ £200 (capped at 100%)
HICBC Charge = Annual Benefit × HICBC %
Net Benefit = Annual Benefit − HICBC Charge
The HICBC threshold was raised from £50,000 to £60,000 in April 2024, and the taper was halved from 1% per £100 to 1% per £200. This means the full clawback point moved from £60,000 to £80,000 — benefiting around 170,000 families.
Adjusted net income is your total taxable income minus pension contributions (relief at source) and Gift Aid donations. Salary sacrifice pension contributions reduce your gross income directly, making them especially powerful for avoiding HICBC.
Example
Sophie — Marketing Manager, 2 children, income £68,000
Sophie earns £68,000 from her employer. Her partner James works part-time earning £18,000. They have two children aged 4 and 7. Sophie makes no additional pension contributions beyond her workplace auto-enrolment (which is via salary sacrifice at £0 extra beyond default).
Benefit Amount tab
HICBC tab
Sophie still keeps £1,351 per year after HICBC. If she increased pension contributions by £8,000/year, her adjusted net income drops to £60,000, eliminating HICBC entirely — saving £900/year in tax while building her pension.