Can I transfer a Cash ISA to a Stocks and shares ISA?

Yes, you absolutely can transfer a Cash ISA to Stocks and shares ISA, and it’s more straightforward than you might think. You can ask to move your entire Cash ISA balance to an AJ Bell Stocks and shares ISA without losing your valuable tax-free wrapper or affecting your annual ISA allowance.

The transfer process is designed to be simple. Rather than withdrawing your money and risking your tax benefits, transferring keeps everything protected under ISA rules while you move from cash savings to investing.

How do ISA transfers work?

When you transfer a Cash ISA to a Stocks and shares ISA, you’re essentially moving your money from one ISA provider to another whilst changing the type of ISA you hold.

The crucial bit? You must do this through an official ISA transfer process, not by withdrawing the money yourself. If you take the cash out yourself, it loses its ISA status, and you’d need to use your current year’s allowance to put it into your new ISA.

The ISA transfer process maintains the tax-efficient status of your savings. This means all the money you’ve contributed in previous years stays protected from income tax and capital gains tax, even after moving to a Stocks and shares ISA.

You can transfer some or all of your Cash ISA holdings from previous years or the current tax year, but each ISA provider can accept partial transfers at their own discretion.

Eligibility

Most people with an existing Cash ISA can transfer to a Stocks and shares ISA without any issues. You need to be a UK resident aged 18 or over to open an AJ Bell Stocks and shares ISA.

How to transfer a Cash ISA to a Stocks and shares ISA

1. Choose a Stocks and shares ISA provider

First, you’ll need to decide where you want your money to go. A Stocks and shares ISA with AJ Bell offers access to thousands of funds, shares, and investment trusts. You can manage everything through our online platform or mobile app, with clear pricing that starts from £1.50 per deal.

2. Start the transfer

The transfer process begins with your new provider, not the one you're moving from. Once you’ve opened your new account, you can tell us which ISA(s) you want to transfer.

Transfer to AJ Bell

We’ll then contact your current ISA provider on your behalf to request the transfer. This is why you should never withdraw the money yourself – we handle all the communication between providers. Read our how to transfer an ISA guide for more information on the process.

3. Gather the information you’ll need

You’ll need some basic information to hand when completing the transfer request. This includes details of your current ISA provider, your account number with them, and how much you want to transfer. If you’re transferring your entire Cash ISA, just indicate that – you don’t need to know the exact amount down to the penny.

Make sure the name and account numbers on your current ISA match exactly what you’re putting on the transfer request. Any discrepancies can slow things down.

4. Wait for it to complete

Cash ISA transfers usually complete in around two weeks. But it does depend on how long it takes your current provider to respond to our request and release the funds.

You’ll receive confirmation once the transfer arrives in your AJ Bell Stocks and shares ISA. At that point, the cash sits in your account ready to invest. It doesn’t automatically get invested – you’ll need to decide which funds, shares, or other investments you want to buy.

What are the benefits and drawbacks of transferring a Cash ISA?

Moving from cash to investments opens up potential for better long-term growth, particularly if cash interest rates begin to fall. Here’s what to consider:

•   Potential for higher returns: Historically, stock market investments have outperformed cash over longer periods, though past performance isn’t a guarantee
•   Inflation protection: Investments have a better chance of beating inflation compared to cash savings, especially in current economic conditions
•   Diversification: You can spread your money across different assets, sectors, and geographies through funds and investment trusts
•   Flexibility: AJ Bell’s platform lets you hold both cash and investments in the same ISA, so you don’t have to invest everything immediately

But keep in mind that unlike Cash ISAs, Stocks and shares ISAs don’t offer guaranteed returns. Your investments can go down in value as well as up, and you might get back less than you put in. There are also investment charges to consider. Read more about the differences between a Cash ISA and a Stocks and shares ISA. 

Tax implications

When you follow the proper ISA transfer process, your money retains its ISA status, meaning: 

•   The transfer doesn’t count towards your annual ISA allowance of £20,000 (for the current tax year)
•   You preserve all those previous years’ contributions outside your current allowance, meaning you can potentially shelter even more money from tax by adding new contributions on top

The tax benefits continue after the transfer is complete. Any growth in your Stocks and shares ISA remains tax-free, whether that’s from share price increases, fund growth, or income. Learn more about what a Stocks and shares ISA is and how it works.