Institutions
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Frequently asked questions

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What does ISA stand for and how does it work?

An ISA (Individual Savings Account) is a tax-efficient account that allows you to save or invest money each tax year without paying tax on the interest on cash, income or capital gains you earn.
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There are 4 types of adult ISA accounts available:
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- Stocks and Shares ISA
- Cash ISA
- Innovative Finance ISA
- Lifetime ISA
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A stocks and shares ISA lets you invest in “qualifying instruments” such as stocks and shares, funds, bonds,  etc. It is not an investment in its own right, but rather a tax efficient ‘wrapper’ which protects your eligible investments from Income Tax and Capital Gains Tax.
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With a MEXEM UK stocks and Shares ISA, you have access to the global market, and are able to choose from a range of investments to invest in.
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When choosing the right ISA for your needs, it's important to consider your financial goals, risk appetite, and personal circumstances. MEXEM UK offers a Stocks and Shares ISA and a Junior Stocks and Shares ISA.  
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Please note, tax treatments depend on your individual circumstances and may change in the future. This information is based on HMRC guidance.

How much can I contribute to an ISA each tax year? / what is the ISA allowance?

The ISA allowance is the maximum amount you are allowed to contribute across all your ISAs during a single tax year. The UK tax year runs from 6 April to 5 April of the following year.
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For the 2026/27 tax year, the ISA allowance is £20,000 per person. You can divide this allowance across different types of ISAs, as long as you subscribe to only one of each type within the same tax year.
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Any unused allowance does not carry over to the next tax year.
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Important Information:
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If you already subscribed to a Stocks and Shares ISA with another provider during the current tax year, you cannot also subscribe to a MEXEM UK Stocks and Shares ISA in that same year.

To view how much you have contributed to your MEXEM UK Stocks and Shares ISA and the remaining allowance available you can check this in your Client portal Transfer & Pay > Deposit page . Note, this assumes you havent subscribed to any ISAs elsewhere.
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For more information, visit the HMRC ISA allowance guidance

Can I transfer my existing investments or cash to MEXEM?

Yes. You can easily transfer both cash and existing investment positions from another broker to MEXEM UK.
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Stock & ETF transfers: Most UK and international listed securities can be transferred in-kind.
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Cash transfers: Supported in GBP, EUR, and other major currencies, credited directly to your MEXEM UK account.

ISA and Junior ISA deposits must be made in GBP.
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ISA transfers: We accept Stocks & Shares ISA transfers from other ISA managers, with no exit or entry fees from our side.

Can I upgrade from a GIA Retail classfication to a Professional classication?

Yes. Eligible clients can apply to be classified as an Elective or Per Se Professional Client under FCA COBS 3.5.
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This provides access to greater leverage, subject to FCA suitability criteria.

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How long do deposits and withdrawals take?

Domestic GBP transfers usually appear within 1 business day, while international transfers can take 2–3 business days depending on your bank.


Withdrawals are processed securely to your verified account through the Client Portal

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Secure & Regulated Trading

Mexem Financial Services UK Ltd is authorised and regulated by the Financial Conduct Authority (FCA), Firm Reference Number 1009371. We act as a fully disclosed introducing broker to Interactive Brokers (UK) Ltd (IBUK), a globally regulated custodian and execution venue. We provide secure access to global markets under UK regulatory protections.
FCA regulated
MEXEM UK is authorised and regulated by the Financial Conduct Authority (FCA), ensuring adherence to strict capital, conduct, and client asset protection rules.
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FSCS protected
Eligible client deposits and investments are protected by the Financial Services Compensation Scheme (FSCS) up to £85,000, providing an additional layer of security in unlikely events.
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Powered by Interactive Brokers
Our robust infrastructure leverages the global strength and advanced security protocols of our partner, Interactive Brokers (IBKR), a world-leading broker.
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Segregated client accounts
Your funds are held in segregated accounts, entirely separate from MEXEM's operational capital, ensuring your money is protected and easily identifiable.
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