Why tax efficiency matters when saving for children

Saving for a child is a long game. Whether you are putting away £25 a month or a lump sum from grandparents, how you hold that money can make a real difference to what is available when it matters — for university, a first home, or simply a head start. Tax-efficient accounts and trusts reduce the drag of income tax, dividend tax and capital gains tax, so more of your money stays invested. But tax is only half the story. Access rules matter just as much. A product that is tax-free but locked until 18 may not suit every family, while a flexible option might leave the child able to spend the money earlier than you intended.

Junior ISAs: the tax-free wrapper built for children

A Junior ISA is a dedicated savings or investment account for a child under 18 who lives in the UK. There are two types: Junior Cash ISA and Junior Stocks and Shares ISA. You can open one of each and split contributions between them. The annual allowance is £9,000 for the 2025/26 tax year, and unused allowance cannot be carried forward. Anyone can contribute — parents, grandparents, friends — as long as the total stays within the limit.

Inside a Junior ISA, interest, dividends and capital gains are free of UK tax. The money belongs to the child, and it does not affect your own ISA allowance or tax position. The trade-off is access. The child can take control at 16, but cannot withdraw until 18. Before then, withdrawals are only allowed in very limited circumstances, such as terminal illness. If you want the money preserved for a milestone birthday, a Junior ISA is hard to beat.

• Best for: long-term growth with no tax drag.
• Watch out for: the £9,000 annual limit and the age 18 lock-in.
• Tax treatment: tax-free interest, dividends and gains.

Premium Bonds: tax-free prizes with a savings habit

Premium Bonds are a government-backed savings product where instead of interest you receive entries into a monthly prize draw. Each £1 bond is an entry, and prizes range from £25 to £1 million. Prizes are tax-free. The minimum purchase is £25, and each person can hold up to £50,000. A parent or guardian can buy Premium Bonds for a child under 16, and the child can take control at 16.

Unlike a Junior ISA, Premium Bonds have no fixed maturity date. The adult managing the bonds can cash them in before the child turns 16, and the child can cash them in from age 16. That makes them more flexible, but also easier to spend early. The prize fund rate is variable, and average returns may be lower than a savings account or investment portfolio. Premium Bonds work best as part of a mixed approach — perhaps for money you want accessible and tax-free, while a Junior ISA handles long-term growth.

• Best for: tax-free prizes and flexible access from age 16.
• Watch out for: variable returns and no guaranteed income.
• Tax treatment: prizes are tax-free and do not use your personal savings allowance.

Bare trusts: control and flexibility, but know the rules

A bare trust (also called an absolute trust) is a simple trust where the child has an absolute right to the assets and any income they produce. You can hold cash, investments, or property in a bare trust. The trustee manages the assets until the child reaches the age of majority — 18 in England and Wales, 16 in Scotland — at which point the child can take full control. Bare trusts are flexible because you can choose investments and decide when to sell or switch. They are useful if you want to put more than the Junior ISA allowance into a child's name without a discretionary trust.

The tax rules need care. Income and capital gains are taxed on the child, which can be efficient because children have their own personal allowance and capital gains tax exemption. But if a parent gives money to a bare trust for their own minor child, any income above £100 per year is taxed on the parent. That rule does not apply to gifts from grandparents or other relatives. Bare trusts are irrevocable: once you put assets in, you cannot take them back. The child is entitled to the assets at the age of majority.

Comparing access rules before you choose

Access is where these options differ most. A Junior ISA is locked until 18. Premium Bonds can be cashed in by the parent before 16, and by the child from 16. A bare trust gives the child legal control at 18 (or 16 in Scotland), although trustees can use income for the child's benefit before then. If you want to ensure the money is still there for a milestone birthday, the Junior ISA's lock-in is a feature, not a bug. If you value flexibility for emergencies or changing circumstances, Premium Bonds or a bare trust may suit better. Remember that money in a bare trust belongs to the child, and you cannot change your mind later.

Practical steps to get started

Start by clarifying your goal. Is this money for university, a house deposit, or general future security? That tells you how long you can lock it away. Next, check the child's existing accounts. You can open a Junior ISA even if the child has a Child Trust Fund, but you cannot pay into both in the same tax year. For Premium Bonds, you will need the child's details and a bank account for prizes. For a bare trust, professional advice can help with paperwork, especially for larger sums. Finally, review the plan each year. Allowances change, and circumstances change too. A mix of a Junior ISA for long-term growth and Premium Bonds for flexible, tax-free prizes is a common and sensible approach for many UK families.