When is a Child’s Income Taxable on Their Parent?

As a parent, you might think your child’s pocket money or weekend job earnings are entirely their responsibility. The reality, however, is more nuanced. Under UK tax law, certain types of children’s income can actually be taxed as the parent’s income—not the child’s. This can catch families off guard, particularly when grandparents are generous or children start earning from their own efforts. Understanding when this applies could save you a significant tax bill.

The Gilded Youth Rules: Investment Income from Parents

The most important rule to understand is what HMRC calls the “Gilded Youth Rules” (technically, Section 629 of the Income Tax Act 2007). If a child receives investment income—such as interest, dividends, or rental income—from assets gifted by a parent, that income is taxed as the parent’s income, not the child’s.

This applies if:

• A parent has gifted money or assets to their child
• The child receives investment income from those assets
• The child is under 18 (or under 16 if it’s income from a settlement made before age 18)

For example, if you gift £5,000 to your child and they invest it in a savings account earning interest, that interest is treated as your income for tax purposes. This prevents parents from using their children’s personal allowances to shelter investment income.

Important caveat: The rule does not apply to income from gifts made by grandparents, aunts, uncles, or other relatives—only parents. Grandparents’ gifts are treated normally under the child’s own allowances.

The Personal Allowance Threshold

Every UK resident has a personal allowance (2024/25 tax year: £12,570). Children benefit from this too. Their earned income—wages from a job, for instance—is typically tax-free up to this threshold.

However, many children don’t earn anywhere near this amount. A child working part-time on weekends or during holidays might earn only £2,000–£3,000 per year, well within their allowance. In these cases, no tax is due.

The problem arises when you layer investment income on top. If your child earns £1,500 from a Saturday job and receives £2,000 in interest from a parental gift (counted as your income), their earned income remains untaxed, but your tax position is affected. You’ll need to declare that investment income on your Self Assessment return.

Income from a Child’s Own Efforts

Income a child generates from their own work—a paper round, babysitting, tutoring, or a part-time job—is taxed as the child’s income. This is separate from the Gilded Youth Rules.

If your child earns under their personal allowance, no tax is due, and they don’t need to file a Self Assessment return. If they earn above it, they may need to register for Self Assessment, although HMRC often waives this requirement for simple cases.

There’s also something called “earned income” relief, which can be useful. If a child has investment income but also earned income, their personal allowance covers earned income first, potentially allowing investment income to fall within the allowance as well.

Trading and Self-Employment

If your child is self-employed—running a small business or freelancing—the income is theirs, not yours. However, you may be entitled to claim gift relief if you’ve funded their business through gifts. This becomes complicated quickly and depends on the nature of the business and the structure of the gift.

For children under 16, there are additional restrictions on what kinds of work they can do legally, and employment law protections apply. Make sure any work complies with the Children and Young Persons Act 1933.

What You Should Do

If your child receives income from parental gifts, keep clear records of:

• What you gifted and when
• How much investment income it generated each year
• Whether the child earned any income themselves

When completing your Self Assessment return, declare the investment income as yours. If you’re unsure whether the Gilded Youth Rules apply to your situation, it’s worth asking—the distinction between “investment income from a parental gift” and “income from a gift by someone else” is important.

Conclusion

The UK tax system has specific rules about children’s income, and they’re not always straightforward. Whilst earned income from a child’s own work is generally tax-free up to their personal allowance, investment income from parental gifts is taxed differently. Getting this wrong could result in an unexpected tax bill or a misplaced Self Assessment return.

For tailored advice on your family’s tax situation, contact Severn Accounting—we’re here to help.