Mexem Logo
Open Accountclose
CHOOSE YOUR MEXEM
ACCOUNT TYPE
Kérjük, a regisztráció során ne használjon ékezetes betűket!
Por favor, ingrese sus datos sin acentos, tildes ni caracteres especiales
Stocks & Shares
Junior ISA
Tax-free investing made simple – for you and your children
A Junior Individual Savings Account (JISA) is a tax-efficient way to save or invest for a child’s future. All returns, whether from cash savings, shares, bonds, or funds, are free from UK income tax and capital gains tax.
Eligible investments include:
Available for children under 18
Annual contribution limit: £9,000 (2025/26 tax year)
Funds are locked until the child turns 18
At 18, the JISA automatically becomes an adult ISA
*Eligible investments are determined by HMRC
*ISA contributions must be made in GBP only (HMRC requirement)
Who Can Open a JISA?
You can open and hold a Stocks & Shares ISA if you are:
Child eligibility
Must be under 18
Must be UK resident for tax purposes
Cannot already hold a Child Trust Fund (CTF) (unless transferring it into the JISA)
Who can open the account?
A parent or legal guardian with parental responsibility can open the JISA.
If the child is 16 or 17, they can open their own JISA.
Who can contribute?
Once opened, anyone,parents, grandparents, relatives, or friends, can contribute up to the annual limit.
Choose Mexem for your
Stocks & Shares JISA
Mexem’s platform is powerful enough for professional traders yet easy to navigate for retail Junior investors.
Global Access
Trade in 33 countries, on 150 market venues, and in 23 currencies, all from a single account.
Trading Platfrom
Start small and still invest in big-name companies, making it easier to diversify.
Unified Portfolio Reporting
View and manage your JISA alongside all your other accounts in one clear, real-time dashboard.
Trust & Support
Institutional grade execution with SmartRouting technology for best available prices.
For experienced investors
Advanced order types, portfolio analysis tools, real-time market data.
For new investors
Clean, intuitive interface, guided account setup, and educational resources.
Transparent Pricing
Mexem’s platform is powerful enough for professional traders yet easy to navigate for retail investors.
Platform Fee
FREE
0.25% (max £3.50 per month)
0.45% per annum (capped at £45/year)
£4.99 per month
US Stocks
FREE
£5 (or £3.50 if ≥10 trades last month)
£5.99 - £11.95 (lower tier for 20+ trades)
£3.99
EU Stocks
FREE
£5 (or £3.50 if ≥10 trades last month)
£5.99 - £11.95 (lower tier for 20+ trades)
£9.99 (or £5.99 on a plan)
UK Stocks
£2 per trade
£5 (or £3.50 if ≥10 trades last month)
£5.99 - £11.95 (lower tier for 20+ trades)
£3.99
Non-base stocks
FREE
£5 (or £3.50 if ≥10 trades last month)
£5.99 - £11.95 (lower tier for 20+ trades)
£9.99 (or £5.99 on a plan)
ETFs
FREE
£5 (or £3.50 if ≥10 trades last month)
£5.99 - £11.95 (lower tier for 20+ trades)
£3.99
FX Conversions
0.25%
(any trade value) * Third party fees apply
(any trade value) * Third party fees apply
0.75%
0.25%-1% (Depending on tade value 5k-20k+)
1.5% (on the first 25K)
Disclosure: Fee data shown in this comparison table reflects publicly available standard pricing for [AJBell, Hargreaves Lansdown, Interactive Investor)] as of [08/09/2025], excluding any promotional offers or temporary campaigns. Other charges, such as FX conversion, custody, inactivity, and withdrawal fees, may apply depending on the provider and account type. We recommend reviewing each provider's full fee schedule directly before making investment decisions.*For MEXEM ISA FX Conversions third party fees apply, capped at total commission of 0.35%
Transfer Your Existing JISA
If you already have an ISA or JISA elsewhere, you can move it to Mexem. We facilitate in-specie transfers, allowing you to move your portfolio without having to sell your current investments and with no transfer fees from us.
jisa FAQ
what is JISA?
A Junior ISA (JISA) is a tax-free savings and investment account designed to help you build a secure financial future for your child. Any money you invest grows free from Income Tax and Capital Gains Tax, making it one of the most efficient ways to save for their future.
There are two types of Junior ISAs available in the UK:
Junior Cash ISA – earns tax-free interest.
Junior Stocks & Shares ISA – lets you invest in a wide range of qualifying investments such as shares, ETFs, funds, and bonds.
At Mexem UK, we offer a Junior Stocks & Shares ISA that gives you access to 150+ global markets, 33 countries, and 23 currencies, all through our powerful trading platforms.
Who Manages the Account?
Parent or legal guardian: Opens the account and acts as the registered contact.
Ownership: All contributions belong to the child.
Access: Funds remain locked until the child turns 18, at which point the Junior ISA automatically converts into an adult Stocks & Shares ISA.
How Much Can I Contribute Each Year?
For the 2025/26 tax year, the Junior ISA annual allowance is £9,000.
This limit applies across all Junior ISAs your child may hold, including both cash and stocks & shares accounts.
What Can I Invest In?
With a Mexem UK Junior Stocks & Shares ISA, you can invest in a wide range of qualifying instruments approved by HMRC, including:
UK and international shares
Exchange-Traded Funds (ETFs)
UCITS and mutual funds
Bonds and fixed-income securities
Depository receipts
Can I transfer an existing Junior ISA to Mexem UK?
Yes. You can transfer your existing Junior Stocks & Shares ISA or Junior Cash ISA from another provider into a Mexem UK Junior Stocks & Shares ISA.
Important: Mexem UK does not currently accept Child Trust Fund (CTF) transfers. If your child has a CTF, you’ll need to transfer it to another provider that supports CTF conversions before moving it to Mexem UK.
Are there any fees for transferring a Junior ISA to Mexem UK?
Mexem UK does not charge any transfer-in fees.
However, your existing provider may charge an exit fee — check with them before submitting the request.
Open Your JUNIOR ISA Today
Take advantage of tax-free investing and global market access with a platform designed for clarity, control, and growth.