Child Benefit feels like one of the few simple things the UK system offers. You have children, you register, the money lands in your account every four weeks. No means test, no annual renewal, no catch.

But there is a catch, and it has a name: the High Income Child Benefit Charge (HICBC).

The reality is that once the higher earner in your household has an adjusted net income over £60,000, HMRC starts taking the Child Benefit back through a tax charge. By £80,000, it is gone entirely. What most parents miss is that the threshold does not look at your gross salary. It looks at your adjusted net income, and that is a number you have real control over.

Control it, and you can reclaim the benefit and top up your pension in the same move.

How the High Income Child Benefit Charge actually works

The charge is deliberately gradual. For every £200 of adjusted net income above £60,000, you repay 1% of your Child Benefit through a tax charge. Do the arithmetic and it lands cleanly: £20,000 of income between £60,000 and £80,000, divided into £200 slices, is 100 slices, so at £80,000 the charge equals 100% of the benefit. Above £80,000 there is nothing left to reclaim.

The threshold was £50,000 for years. It was raised to £60,000 in April 2024, and the full clawback point moved from £60,000 to £80,000 at the same time, which widened the band and softened the cliff-edge.

To put a figure on what is at stake: in 2026/27, Child Benefit is worth roughly £27 a week for your eldest child and about £18 for each additional child. For two children, that is around £2,350 a year of tax-free money. That is the sum the charge is chipping away at.

One useful change worth knowing: since 2025, you can pay the HICBC through your PAYE tax code rather than being forced into a Self Assessment return every year. It does not reduce the charge, but it removes a paperwork burden that pushed a lot of families into giving up their Child Benefit altogether.

The quirk: it is one person's income, not the household's

Here is where the charge surprises people. It is assessed on the highest individual earner, not on combined household income.

So two parents each earning £55,000, a household pulling in £110,000, keep every penny of their Child Benefit. Meanwhile a single-earner household on £85,000, with the other parent at home on nothing, loses all of it. Same childcare, very different outcome, purely because of how one person's income sits against the line.

It is an odd rule. But it is the rule, and it means the planning question is always about one specific person's number.

The lever most people miss: adjusted net income

The charge is not assessed on your salary. It is assessed on your adjusted net income, which is your total taxable income minus a few specific reliefs. The two big ones are gross pension contributions and Gift Aid donations. Both reduce your adjusted net income pound for pound.

That is the whole game.

If your adjusted net income is £68,000, a gross pension contribution of £8,000 pulls it back to £60,000, and the charge disappears. Crucially, the money is not spent. It has moved into your pension, where it also picks up tax relief. You reclaim the Child Benefit and get relief on the way in. One contribution, two wins.

And it works proportionally. You do not have to clear the whole £60,000 line in one go. Every £200 of adjusted net income you shed reclaims another 1% of the benefit, so even a partial contribution claws back part of the charge.

A worked example

Consider Sarah, 42, in England. Two children, and an adjusted net income of about £68,000 after a recent pay rise pushed her over the line. Her Child Benefit for two children is worth roughly £2,350 a year.

At £68,000, she is £8,000 over the threshold. That is 40 slices of £200, so the charge reclaims 40% of her Child Benefit: about £940. She keeps the rest, but she is handing back nearly a thousand pounds of a tax-free benefit.

Now suppose she makes an £8,000 gross pension contribution into her SIPP (Self-Invested Personal Pension). Into a personal pension, she pays £6,400 from her take-home pay and basic-rate relief of £1,600 is added automatically, making £8,000 gross. That £8,000 reduces her adjusted net income to £60,000.

Follow the money for Sarah. She puts £6,400 of take-home pay into the pension. She claims about £1,600 of higher-rate relief back through her tax return or tax code. And by dropping under £60,000, she avoids the £940 charge she would otherwise have paid. Net, roughly £3,860 of her own money has become £8,000 sitting in her pension, and her family keeps every penny of its Child Benefit.

That is not a guaranteed result, and it is not advice to contribute any particular amount. It is the mechanics, on stated assumptions, for one illustrative profile. Income tax rates differ in Scotland, so the relief side of the sum shifts there, though the Child Benefit charge itself is UK-wide. And a pension contribution locks money away until at least age 55 (57 from April 2028), so it is a retirement decision, not just a tax one.

The same lever runs the 60% trap, too

If the adjusted-net-income mechanic feels familiar, it should. It is the exact same lever that governs the Personal Allowance taper, where every £1 of income between £100,000 and £125,140 costs you 60p once you count the tax and the allowance you lose. Same adjusted net income, same pension solution, different and higher band.

Which is where it stops being a single sum on the back of an envelope. A higher earner with children can be threading two needles at once: the £60,000 to £80,000 Child Benefit band and the £100,000 to £125,140 Personal Allowance band. How much to route into a pension to manage both, without over-contributing or derailing the retirement you are actually saving for, is a genuinely fiddly optimisation.

This is exactly the kind of decision Optiml UK is being built to model. When it launches, the plan is to let you see, on your own numbers, how a pension contribution moves your adjusted net income, what it reclaims in Child Benefit and Personal Allowance, what it earns in tax relief, and what it means for your retirement pot decades out. Not a rule of thumb. Your figures, sequenced.

Optiml proved this approach in Canada, and we are now rebuilding the engine around UK pensions, ISAs, the State Pension, and HMRC rules. It is not live here yet. The waitlist is where you get launch news first, and founding-member pricing.

Because the £60,000 line is not really a ceiling on what you can earn.

It is a decision about where your next £8,000 goes.