Junior Cash ISA | Child ISA

Q: What is a Junior Cash ISA?

A Junior Cash ISA is a tax-free savings account for children under the age of 18 who are resident in the UK. Parents or legal guardians can save up to £9,000 per tax year, and the money belongs to the child. Funds are locked until they turn 18, helping build a financial foundation for their future.

Q: Is my money protected?

Yes, CMC Invest is authorised and regulated by the Financial Conduct Authority (FCA) and we have regulatory permissions to hold and control client money. Learn more about how your money is protected.

Q: Can I transfer an existing Junior Cash ISA to CMC Invest?

Yes, you can. A child can only have one Junior Cash ISA (JISA). If you want to open a new account, you’ll need to transfer your existing JISA to CMC Invest. All you have to do is download the CMC Invest app, open a JISA, fill out our transfer form in the app, and we’ll work with your current provider to transfer your savings on your behalf. Learn more about our transfer process. However, if you’re transferring a fixed-rate ISA before maturity (when the fixed-rate ISA ends), you may incur an early closure charge or penalty from your current provider.

Q: Can I transfer a fixed-rate Junior Cash ISA?

Yes, you can. You can transfer a fixed-rate ISA before or after the maturity date (when the fixed-rate ISA ends). However, it's essential to be aware that transferring a fixed-rate ISA before its maturity may incur an early closure charge from your current provider.

Q: How do I open and manage the account?

If you're a parent or legal guardian, you can open and manage the account for a child under 18 years old who lives in the UK. A Junior Cash ISA can be opened from as little as £1, and has a £9,000 annual contribution limit across all Junior ISAs – including a Junior Stocks & Shares ISA. Transferring existing Junior Cash ISAs to CMC Invest can be initiated and managed all within the CMC Invest app. Learn more about our transfer process.

Q: How much money do I need to open a Junior Cash ISA?

With CMC Invest, the minimum amount you can deposit is £1. You can use your debit card to add funds, but you can’t deposit more than £9,000 across multiple Junior ISAs in the same tax year.

Q: Can I withdraw money?

No, you can't. Money can't be withdrawn from a Junior ISA until the child is 18. And any contributions to the Junior ISA can't be refunded and belong to the child. You can cancel the account free of charge within 14 days of opening. For special circumstance closures, view our terms and conditions.

Q: Do you offer a lifetime ISA?

Currently, we only offer a junior ISA, a flexible Cash ISA and a flexible Stocks & Shares ISA. If you’re interested in us adding other types of ISAs, please let us know using the ‘Send us your feedback’ banner on the home screen in the app.

Q: Does the Junior Cash ISA have any fees?

No, there are no fees to hold a Junior Cash ISA.

Q: Is CMC Invest regulated?

Yes, CMC Markets Investments Limited (registration number 948126) is fully authorised and regulated by the Financial Conduct Authority (FCA) in the UK. Retail client money is held in segregated client bank accounts, and money held on behalf of clients is distributed across a range of major banks, which are regularly assessed against our risk criteria.

CMC Markets is a multi-asset investment platform. The value of your investments may go up or down. When you invest, your capital is at risk.

Financial Conduct Authority regulated

Protected up to £120,000¹

FTSE 250 group

2024 WINNER

Best For Share Traders

Boring Money

2023 WINNER

Stocks & Shares ISA Innovation

Finder

2024 WINNER

Best For Low Cost ISA < £50K

Boring Money

Why save with CMC Invest?

3.75% AER* (variable) – earned daily, paid monthly

Save up to £9,000 for each child across all their ISAs each tax year. Interest earned on their money is 100% tax-free, accumulates daily and is paid monthly.

Open and manage the account in our app

No need for paperwork or branches – you can open, manage and track your account all online via our app. Simply download the CMC Invest app and follow the steps to open a Junior Cash ISA.

Low minimum deposit

Open a Junior Cash ISA and fund it with a minimum of £1.

Transfer Junior ISAs from other providers

Transfer existing Junior ISAs and/or Child Trust Funds in just a few taps in the app. Learn more about our transfer process.

Over 2 million global customers*

We’re part of the CMC Markets plc group, a FTSE 250 index financial services group of companies serving over 2 million customers* globally.

*Based on over 2 million unique user logins across CMC's trading and investing platforms, including partners, as at November 2025.

What is a Junior Cash ISA?

A Junior Cash ISA is a savings account for children that lets you earn interest on their savings tax-free. That means no UK income tax is payable on the interest earned within the ISA.

The account allows parents or guardians to deposit up to £9,000 per tax year across all Junior ISAs on behalf of the child. Withdrawals are not permitted until the child turns 18, at which point the Junior Cash ISA automatically converts into an adult ISA. The savings remain in the child’s name throughout, helping build a financial foundation for their future.

Tax treatment depends on individual circumstances and may change in the future.

Straightforward price plans

Choose from one of our plans that suits what you need. No hidden fees, no nasty surprises, just straightforward and transparent pricing. FX fees and UK government charges may apply.

Core plan

For savers & new investors. Start with a flexible Cash ISA, Junior Cash ISA and GIA, with no monthly fee.

£0
/month

Get started with Core

popular

Plus plan

For growing investors. Get a Stocks & Shares ISA, lower FX fees & more investment options.

£6.99
/month

Get started with Plus

Premium plan

For long-term planners. Manage your ISA, GIA & SIPP in one app with our top rates & tools.

£10.99
/month

Get started with Premium

Equities

Invest in more than 16,000 shares and ETFs across global stock markets.

£0
/month

Learn more

When you invest, your capital is at risk.
For the full list of platform benefits, compare our price plans.

See what our customers say about CMC Invest

I like it because it’s easy to trade or…I like it because it’s easy to trade or make deposit or withdraw and quick login and logout and no extra charges Afsin,8 hours ago

Enjoying the demo facilityEnjoying the demo facility. Allows you to experiment with strategies.Gavin Hatchett,yesterday

Intuitive to get started and useIntuitive to get started and use, Carl F,3 days ago

trading system is okaytrading system is okayCindy,3 days ago

Everything worksEverything works, professional-looking interface which is intuitive and easy to use. Andrej Močan,4 days ago

I’ve had a very positive experience…I’ve had a very positive experience with CMC Markets. The platform is straightforward and easy to use, with useful trading tools and clear pricing. I’ve also found the customer service team to be helpful and responsive. Overall, I’m very happy with the service and would recommend CMC Markets.Yin Liu,5 days ago

Great platformGreat platformJames Taylor,6 days ago

Quick response and reported price…Quick response and reported price actions , easy on the eye on the phone darren stewart,6 days ago

MGMJLook like my money going over there.Fashion Nova,14 October

GoodIt was greatFarzad,14 October

Dive deeper

Best ways to save money for your kids in 2026

Time is one of the biggest advantages when saving for children. A children’s savings account is the simplest way to start for their future.

Kids saving strategy explained

What is a Junior ISA? A guide to JISAs

A Junior Individual Savings Account (Junior ISA or JISA) is a tax-free savings account for children under 18 who live in the UK

Junior ISA guide

FAQs

New to a Junior ISA?

What is a Junior Cash ISA?

Is my money protected?

Can I transfer an existing Junior Cash ISA to CMC Invest?

Can I transfer a fixed-rate Junior Cash ISA?

How do I open and manage the account?

How much money do I need to open a Junior Cash ISA?

Can I withdraw money?

Do you offer a lifetime ISA?

Does the Junior Cash ISA have any fees?

New to CMC Invest?

Is CMC Invest regulated?

Is CMC Invest covered by the FSCS?

How does CMC Invest segregate client money?

Do I pay tax on my investments?

How do I contact customer support?

¹FSCS is an independent body that offers protection to customers of financial services firms that have failed. The compensation amount may be up to £120,000 per eligible person, per firm. Eligibility conditions apply. Please contact the FSCS for more information.

3.75% AER*
Junior Cash ISA

Why save with CMC Invest?

What is a Junior Cash ISA?

Straightforward price plans

£0
/month

£6.99
/month

£10.99
/month

£0
/month

See what our customers say about CMC Invest

Dive deeper

Best ways to save money for your kids in 2026

What is a Junior ISA? A guide to JISAs

FAQs

Ready to get started?

3.75% AER*
Junior Cash ISA

What is a Junior Cash ISA?

Straightforward price plans

£0
/month

£6.99
/month

£10.99
/month

£0
/month

See what our customers say about CMC Invest

Dive deeper

Best ways to save money for your kids in 2026

What is a Junior ISA? A guide to JISAs

FAQs

Ready to get started?

3.75% AER*Junior Cash ISA

Why save with CMC Invest?

What is a Junior Cash ISA?

Straightforward price plans

£0/month

£6.99/month

£10.99/month

£0/month

See what our customers say about CMC Invest

Dive deeper

Best ways to save money for your kids in 2026

What is a Junior ISA? A guide to JISAs

FAQs

Ready to get started?

3.75% AER*Junior Cash ISA

What is a Junior Cash ISA?

Straightforward price plans

£0/month

£6.99/month

£10.99/month

£0/month

See what our customers say about CMC Invest

Dive deeper

Best ways to save money for your kids in 2026

What is a Junior ISA? A guide to JISAs

FAQs

Ready to get started?

3.75% AER*
Junior Cash ISA

£0
/month

£6.99
/month

£10.99
/month

£0
/month

3.75% AER*
Junior Cash ISA

£0
/month

£6.99
/month

£10.99
/month

£0
/month