Child Benefit & High Income Charge Calculator

The High Income Child Benefit Charge is assessed on one person's income, not your household's combined income. That means two parents each earning £59,999, a household on almost £120,000, keep every penny of their Child Benefit. A single earner on £80,000, with a partner earning nothing, loses essentially all of it. Same number of children, less than two-thirds of the household income, and a dramatically worse outcome. It has never made much sense, and it's been pointed out for years.

A government consultation floated moving to a household-income basis, targeted for April 2026. It didn't happen. The plan was dropped after the 2024 general election brought in a new government, and the charge remains exactly as individually-assessed as it's always been. If you've seen old articles predicting a household-basis system, they're describing a reform that was cancelled, not the current rules.

Put in real numbers, for a two-child family: the two-earner household on £119,998 keeps the full £2,337.40 a year. The single-earner household on £80,000 keeps roughly 40p. The charge is calculated on Child Benefit rounded down to the nearest pound, so a few pence always survive even at full clawback, but that's all that's left. Over £2,300 a year, gone, purely because of how the same total income happens to be arranged between two people.

Because the charge depends on “adjusted net income” rather than salary, pension contributions are a genuine, legitimate way to bring it down, not a loophole, just how the definition works. For every £1 you contribute through a relief-at-source pension (the type where your pension provider claims basic-rate tax relief and adds it to your pot), £1.25 comes off your adjusted net income, because that's the actual amount ending up invested once the relief is added. Salary sacrifice works differently. It reduces your salary before tax is even calculated, so it's already reflected in a lower income figure rather than needing this grossing-up step.

The detail that trips people up: only the higher earner's pension contribution affects the charge, because the charge only ever looks at the higher earner's income. If your partner earns far less and isn't anywhere near the threshold, them contributing more to their own pension does nothing for this particular charge. It's a good idea for entirely separate reasons, just not this one. If you're the higher earner and you're a few thousand pounds over £60,000, a modest increase in your own contribution can eliminate the charge completely, which is usually a far better use of that money than losing it to a tax charge with nothing to show for it.

HMRC's actual method isn't a smooth taper. It's 1 percentage point of the charge for every complete £200 of income above £60,000, capped at 100% once you reach £80,000. That means £70,000 and £70,199 are treated identically (both 50%); it takes crossing £70,200 to move to 51%. It's a small thing, but it means a £1 pay rise can occasionally cost you more in charge than it's worth, right at the edge of a £200 band, worth knowing if you're negotiating a salary close to one of these boundaries.

If the higher earner is at or above £80,000, the charge cancels out almost the entire benefit. You're left with pennies, and the process of receiving it and then paying most of it back (via Self Assessment, or since October 2025, optionally through a PAYE tax code adjustment instead) is genuinely more admin than it's worth for some people. A common approach is to still submit the Child Benefit claim, which is what protects National Insurance credits for whichever parent isn't working (credits that count towards the State Pension), but tick the option not to actually receive the payments, sidestepping the charge process entirely. It's worth doing the claim either way, even at £0 net benefit, purely for those NI credits.

The same adjusted net income figure, and the same pension lever, also determines whether you keep your 30 hours of funded childcare and Tax-Free Childcare once you cross £100,000, a much harder cliff edge than this one. If that's on the horizon too, it's worth checking the childcare cost calculator alongside this one. The same pension contribution can be doing two jobs at once.