For Tax-Free Childcare, adjusted net income is your total taxable income minus grossed-up pension contributions, Gift Aid donations, and a few smaller items. If that figure sits at or below £100,000 for each parent, you qualify. Go a single pound over and you lose the scheme entirely, which is why the calculation matters so much for anyone earning near the cap.
Why £100,000 Is the Number That Matters
The £100,000 threshold applies per person, not per household. A couple earning £90,000 each qualifies. A couple where one parent earns £60,000 and the other earns £105,000 does not.1GOV.UK. Free Childcare for Working Parents – Check If You’re Eligible
Crossing the line costs more than Tax-Free Childcare. The same £100,000 figure controls access to the 30 hours of free childcare for three and four-year-olds in England, and it is also where your personal allowance begins to taper: for every £2 above £100,000, you lose £1 of the £12,570 allowance, which disappears entirely by £125,140.3GOV.UK. Personal Allowances – Adjusted Net Income
What Goes Into Total Taxable Income
The starting point is your total taxable income before personal allowances. HMRC’s guidance pulls in a wide range of sources:2GOV.UK. Personal Allowances – Adjusted Net Income
- Employment income, including salary, wages, bonuses, commissions, and taxable benefits such as company cars or private medical insurance
- Self-employment profits, including income from selling services through apps or platforms
- Bank interest, dividends, and income from trusts
- Rental profits from property you let out
- The State Pension, workplace pensions, and private pension income
- Taxable state benefits such as Jobseeker’s Allowance
- Foreign income, which counts even if it was already taxed abroad4Best Start in Life. Eligibility for Tax-Free Childcare
Your P60 shows employment pay and tax, a P11D captures taxable benefits from your employer, and annual statements from banks and investment platforms confirm interest and dividends. If you file Self Assessment, your return already brings these together.
What You Can Deduct
Once you have total taxable income, specific deductions bring the number down. For parents near the threshold, these are where eligibility is won or lost.
Pension Contributions
The rule depends entirely on what kind of pension you pay into, and mixing them up is the most common mistake at this level.
Relief-at-source pensions (most personal and stakeholder schemes) take contributions from after-tax money, and the provider claims basic-rate tax relief from HMRC. You deduct the grossed-up amount: for every £1 paid in, subtract £1.25. A £4,000 contribution becomes a £5,000 deduction.5GOV.UK. Personal Allowances – Adjusted Net Income
Salary sacrifice and net pay arrangement contributions work differently. They have already been taken off your pay before it hits your P60, so they have already reduced your taxable income at source. You do not deduct them again. Doing so understates your adjusted net income and can trigger penalties.
Employer contributions paid directly, not out of your salary, are not part of your taxable income to begin with and play no role in this calculation.
Gift Aid Donations
Charitable donations made through Gift Aid also come off, using the same grossing-up rule as relief-at-source pensions. Every £1 donated is a £1.25 deduction. Give £800 to charity through Gift Aid, deduct £1,000.6HM Revenue & Customs. HS342 Charitable Giving Keep receipts or acknowledgement letters; HMRC can ask for evidence where Gift Aid meaningfully reduces the final figure.
Trading Losses, Gross Pension Payments, and Trade Union Relief
Trading losses from self-employment and gross pension payments (where no tax relief was given at source) come off at the net income stage, before Gift Aid and grossed-up personal pension contributions.5GOV.UK. Personal Allowances – Adjusted Net Income One item runs the other way: if you claimed tax relief for payments to a trade union or police organisation, up to £100, that amount is added back after the other deductions.
A Worked Example Near the Cap
Suppose your total taxable income across employment, savings, rental, and foreign sources is £108,000. During the year, you paid £4,000 into a relief-at-source personal pension and gave £1,600 to charity through Gift Aid.
- Step 1, net income: start at £108,000. Subtract any trading losses or gross pension payments. None here, so the figure stays at £108,000.
- Step 2, Gift Aid: £1,600 × 1.25 = £2,000. £108,000 − £2,000 = £106,000.
- Step 3, pension: £4,000 × 1.25 = £5,000. £106,000 − £5,000 = £101,000.
- Step 4, trade union add-back: none, so the figure stays at £101,000.
At £101,000, this parent is over the line and does not qualify. Another £800 of Gift Aid, or £1,000 more (grossed up) into the pension, would bring the figure to exactly £100,000 and restore eligibility.
Planning Before the Tax Year Ends
If your projected adjusted net income is close to £100,000, the last weeks of the tax year are the moment to act. Extra pension contributions or Gift Aid donations, once grossed up, can pull the figure back under the cap. The benefit of doing so can far exceed the cost: up to £2,000 per child in annual top-ups, plus 30 free hours, plus recovered personal allowance.
Foreign income is the item that most often catches people out. It counts in full, regardless of where it was earned or whether it has already been taxed abroad. Include it in your projection before deciding how much extra to contribute.
Reconfirming Every Three Months
Tax-Free Childcare is not a one-time approval. You must confirm your details every three months, and HMRC uses your expected income for the current tax year, not last year’s figures.7GOV.UK. Apply for Tax-Free Childcare A mid-year pay rise, bonus, or new income source that pushes your expected adjusted net income above £100,000 has to be declared at the next reconfirmation. Miss the deadline and top-ups stop until you confirm again.
Penalties for Inaccurate Declarations
HMRC can penalise inaccurate eligibility declarations. The amounts are a percentage of the maximum top-up for the three-month entitlement period, which is £500 per child:8HM Revenue & Customs. Tax-Free Childcare Technical Manual – TFC60200
- Careless inaccuracy: 25% of the maximum top-up, so £125 per period
- Deliberate inaccuracy: 50% of the maximum top-up, so £250 per period
Penalties apply per period, so repeated inaccurate declarations stack. Over a full year of deliberate inaccuracies, the total could reach £1,000 per child, and HMRC will also recover any top-ups you were not entitled to. If your income is volatile and you cannot be sure you will stay under £100,000, use a conservative estimate at declaration and adjust at reconfirmation rather than guessing on the optimistic side.