Earning £100,001? Stop! You Just Lost £5,000 in Childcare Benefits. The 'Pension Hack' to Get It Back

📉 The Most Expensive £1 Raise in History

It is January 2026. Congratulations! Your boss just gave you a raise. Your salary went from £99,000 to £101,000.
You celebrate with champagne.

But then you log into your HMRC Childcare Account. "Eligibility Lost."
Because you crossed the £100,000 threshold, you just lost:
1. Tax-Free Childcare (worth up to £2,000 per child).
2. 30 Hours Free Childcare (Now covering ages 9 months to 4 years, worth £6,000 to £15,000+ per year in 2026).
3. Your Personal Allowance starts tapering (creating a 60% effective tax rate).

That £2,000 raise actually cost you over £10,000 in lost value. You are significantly poorer than before. This is the notorious £100k Cliff.

The rule is strict. If either parent has an "Adjusted Net Income" over £100,000, the family loses these benefits instantly.
It doesn't matter if the other parent earns £0.

Earning £100,001? Stop!

What is "Adjusted Net Income"?

It is NOT just your salary.
It is: Total Taxable Income (Salary + Bonus + Dividends + Interest) - Pension Contributions - Gift Aid Donations.

The "Salary Sacrifice" Hack

You don't have to refuse the raise. You just have to divert it.

💰 The Magic Calculation

Scenario: You earn £105,000 in the 2025/26 tax year.
Action: Contribute £5,001 into your workplace pension (Salary Sacrifice) or a private SIPP.

Result:
• Your Adjusted Net Income drops to £99,999.
• You are now "under" the limit.
• You instantly regain £2,000+ in Tax-Free Childcare + the massive 30 Hours Free funding.
• You save 40-42% tax (and NI) on the pension contribution itself.

Gift Aid (Charity)

If you don't want to lock money in a pension, donating to charity works too.
Donating £4,000 to charity (via Gift Aid) reduces your Adjusted Net Income by £5,000 (due to the "grossing up" rule).
This is a great way to support a cause AND save your family's childcare funding.

The "Personal Allowance" Bonus

Don't forget the 60% Tax Trap.
Between £100k and £125,140, you lose £1 of tax-free Personal Allowance for every £2 you earn.
By reducing your income below £100k, you restore your full £12,570 Personal Allowance, saving you another £5,000+ in pure income tax. It's a double win.

🛡️ Chief Editor’s Verdict

Timing is everything.

1. Deadline Alert (April 5th): This calculation is strictly based on the UK Tax Year (April 6 to April 5). You must make the pension contribution or donation before April 5, 2026, to lower your income for that year.
2. Cycle Schemes Count: Buying an e-bike through a "Cycle to Work" salary sacrifice scheme also lowers your adjusted net income effectively.

Be smart. Don't let a pay rise make you poorer.

UK Jurisdiction Warning: This article applies specifically to UK Tax Residents governed by HMRC. US Readers: This strategy does not apply to US tax returns. The figures and thresholds mentioned are based on the 2025/2026 UK tax year rules. This is for educational purposes only and does not constitute financial advice. Please consult a qualified Accountant or IFA.