Junior ISAs: Tax-Free Savings for Your Child's Future

A Junior ISA (JISA) is a tax-free savings account for children under 18. You can contribute up to £9,000 per child per year, and the money grows free of income tax and capital gains tax. The child takes control of the account at 18.

JISAs are one of the simplest ways to build a pot for your child's future, whether for university, a first car, a house deposit, or just a financial head start.

#The Basics

The £9,000 limit is per child, not per account or per contributor. If grandparents contribute £5,000 and parents contribute £4,000, that's the full allowance used.

#Cash vs Stocks & Shares

You can open one of each type per child, but the combined contribution across both can't exceed £9,000 per year.

#Cash Junior ISA

• Works like a savings account
• Capital is protected (no market risk)
• Interest rates vary (currently around 4-5% for the best accounts)
• Suitable for shorter time horizons or risk-averse savers

#Stocks & Shares Junior ISA

• Invested in funds, shares, bonds, or a mix
• Capital is at risk (value can go down)
• Historically higher long-term returns than cash
• Suitable for longer time horizons (10+ years)

#Which to Choose?

For a newborn, stocks & shares makes sense. You have 18 years of investment horizon. Even accounting for market crashes, equities have historically outperformed cash over periods this long.

For a 16-year-old, cash might be more appropriate. Two years isn't long enough to recover from a market downturn.

For ages in between, consider a blend: stocks & shares JISA for long-term growth, moving to cash as they approach 18 if you want to lock in gains.

#Opening a Junior ISA

Who can open one: Only a parent or legal guardian with parental responsibility can open a JISA. This is the "registered contact" who manages the account.

Documents needed: Child's birth certificate or passport, your ID, proof of address.

Where to open: Banks, building societies, and investment platforms offer JISAs. For cash JISAs, compare interest rates. For stocks & shares JISAs, compare fees and investment options.

#Child Trust Funds

If your child was born between 1 September 2002 and 2 January 2011, they might have a Child Trust Fund (CTF) instead. CTFs were the predecessor to JISAs.

You can transfer a CTF to a JISA, which usually offers better rates or lower fees. The transfer is straightforward—the JISA provider handles the paperwork.

#Who Can Contribute

Anyone can pay into a child's JISA:

• Parents
• Grandparents
• Other relatives
• Family friends
• The child themselves (if they have money)

This makes JISAs useful for birthday and Christmas gifts. Instead of more toys, relatives can contribute to the child's future.

Some platforms let you share a contribution link so relatives can pay in directly without needing account access.

#Tax Treatment

#No Tax on Growth

Interest, dividends, and capital gains within a JISA are completely tax-free. There's no need to declare JISA income on tax returns.

This matters more for stocks & shares JISAs, where growth can be substantial. A JISA started at birth with £9,000/year contributions, growing at 7% annually, would be worth around £350,000 at 18—none of it taxable.

#Inheritance Tax

Money you contribute to a JISA is a gift. If you die within 7 years of making the gift, it might count towards your estate for inheritance tax purposes. This rarely matters for normal JISA contributions but could be relevant for grandparents making large gifts.

#No Impact on Your ISA Allowance

JISA contributions don't count towards your own £20,000 adult ISA allowance. They're completely separate.

#What Happens at 18

On the child's 18th birthday, the JISA automatically converts to an adult ISA. The child gains full control.

They can:

• Withdraw all the money
• Keep it invested in the ISA
• Transfer to a different provider
• Continue contributing (now counting towards their adult £20,000 allowance)

You cannot:

• Prevent them accessing the money
• Add conditions on how they use it
• Delay their access beyond 18

This is the main risk of JISAs: you're giving money to a child who becomes a legal adult with full control. A financially immature 18-year-old could withdraw everything and spend it unwisely.

#Managing the Transition

At 16, the child becomes the registered contact and can manage the account (though they still can't withdraw until 18). Use this period to:

• Discuss the account and its purpose
• Talk about financial responsibility
• Help them understand investment or saving decisions

Some parents have frank conversations: "This is for university/a house deposit. We hope you'll use it wisely." Others accept that once it's theirs, it's theirs.

#JISAs vs Other Options

#vs Regular Savings Account

A regular children's savings account has no annual limit but offers no tax advantage. Interest is taxable (though children have their own Personal Allowance, so small amounts of interest are tax-free anyway).

For significant sums, a JISA is better. For small amounts or money the child might need before 18, a regular account offers more flexibility.

#vs Pensions (Junior SIPP)

You can contribute up to £2,880/year (net) to a Junior SIPP, which becomes £3,600 after basic rate tax relief. The money grows tax-free but can't be accessed until the child reaches pension age (currently 57, rising to 58).

JISAs: Accessible at 18, no tax relief on contributions Junior SIPPs: Accessible at 57+, 20% tax relief on contributions

For a child born today, a Junior SIPP wouldn't be accessible until around 2082. That's an extremely long time horizon. JISAs offer a more practical middle ground.

#vs Bare Trusts

A bare trust holds assets for a child without the annual contribution limit of a JISA. But income above £100/year from parental gifts is taxed at the parent's rate (the "parental settlement" rules).

Bare trusts make more sense for grandparent gifts or when you want to give more than £9,000/year and accept the tax implications.

#vs Saving in Your Own Name

Some parents save for their children in their own accounts to retain control. This works but has drawbacks:

• Growth is taxed at your rate
• The money is part of your estate
• The money counts as yours for means-testing

JISAs are more tax-efficient if you're comfortable with the child taking control at 18.

#Investment Options for Stocks & Shares JISAs

If you open a stocks & shares JISA, you'll need to choose investments. Common options:

#Index Funds

Low-cost funds that track a market index (like the FTSE 100 or global stock market). Fees are typically 0.1-0.3% per year. Simple, diversified, and historically effective for long-term growth.

#Managed Funds

Actively managed funds where a fund manager picks investments. Higher fees (often 0.5-1.5% per year). Performance varies—some beat the index, many don't.

#Multi-Asset Funds

Funds that hold a mix of shares, bonds, and other assets. Lower volatility than pure equity funds but typically lower long-term returns too.

#Individual Shares

Some platforms let you hold individual company shares in a JISA. More complex and concentrated risk. Generally not recommended unless you have specific expertise.

For most parents, a low-cost global index fund is a sensible default. You get diversification across thousands of companies worldwide with minimal fees.

#Fees to Watch

#Platform Fees

The provider charges for holding your JISA. This might be:

• A flat fee (e.g., £5/month)
• A percentage of your holdings (e.g., 0.25%/year)
• Free (some providers, especially for cash JISAs)

Flat fees hurt small pots; percentage fees hurt large pots. A £10,000 JISA paying 0.25% costs £25/year. A £100,000 JISA costs £250/year.

#Fund Fees

If you hold funds, they have their own fees (the "ongoing charges figure" or OCF). These are in addition to platform fees. A fund with 0.2% OCF on a platform charging 0.25% means total fees of 0.45%.

#Transaction Fees

Some platforms charge to buy or sell investments. If you're making regular monthly contributions, these add up. Look for platforms with free regular investing.

#Making Regular Contributions

Setting up a monthly standing order or direct debit into the JISA is the easiest way to contribute consistently.

Pound-cost averaging: By investing regularly, you buy more units when prices are low and fewer when prices are high. This smooths out market volatility over time.

Example: £250/month reaches the £9,000 limit in 3 years. Or contribute £750/month for the full year. Whatever fits your budget.

Grandparents can set up standing orders too, or contribute annually (e.g., at Christmas).

#Frequently Asked Questions

#Can I withdraw money from my child's JISA?

No. Once money is in a JISA, only the child can access it, and only after they turn 18. There's no early access, even in emergencies.

#What if I contribute more than £9,000?

The excess contribution is invalid and must be returned. Most providers have systems to prevent over-contribution, but it's your responsibility to track total contributions across all JISAs and any CTF.

#Can my child have multiple JISAs?

One cash JISA and one stocks & shares JISA. No more. You can transfer between providers but can't hold multiple of the same type.

#What happens if my child dies?

The JISA loses its tax-free status and becomes part of the child's estate. Any gains up to the date of death remain tax-free.

#Can I open a JISA for my grandchild?

Only a parent or guardian can open the account. But once open, grandparents can contribute as much as they like (up to the £9,000 annual limit across all contributors).

#Is a JISA better than paying off my mortgage?

Different purposes. Mortgage payoff saves interest at your mortgage rate. JISA grows (hopefully) at investment returns. If your mortgage rate is 5% and you expect JISA investments to return 7%, the JISA wins mathematically—but the mortgage payoff is guaranteed while investment returns aren't.

#What if my child is non-resident?

The child must be UK resident to open or contribute to a JISA. If you move abroad, you can keep the existing JISA but can't add new money until you return.