A Stocks and Shares ISA is a tax-free investment account available to UK residents aged 18 and over. Any growth, dividends, or income earned inside the account is completely free from UK income tax and capital gains tax. You can invest up to £20,000 per tax year — the same as the overall ISA allowance for 2026/27.
How does a Stocks and Shares ISA work?
You open an account with an investment platform, deposit money up to the annual limit, and choose what to invest in — funds, ETFs, shares, bonds, or investment trusts. All returns generated inside the ISA wrapper are tax-free. You can withdraw money at any time without losing the tax protection on what remains in the account.
Unlike a pension, there is no minimum access age — you can withdraw from a Stocks and Shares ISA at any time. This makes it useful for both long-term goals like retirement and medium-term goals like buying a home.
What can I invest in?
Depending on the platform, a Stocks and Shares ISA can hold:
- Funds and ETFs — including index funds tracking global markets. The most popular choice for beginners
- Individual shares — buying stock in specific companies listed on UK and international exchanges
- Investment trusts — listed companies that invest in a portfolio of assets
- Bonds — government or corporate debt that pays regular interest
Most beginners start with a low-cost global index fund. See our guide to what is an index fund for more detail on this approach.
Stocks and Shares ISA vs Cash ISA
Both are tax-free — but they work differently. A Cash ISA holds money in savings accounts and earns interest. A Stocks and Shares ISA invests in markets and has the potential for higher returns over the long term — but also the risk of losing money. The right choice depends on your time horizon and risk tolerance. Most financial planners suggest using a Cash ISA for money you might need within five years and a Stocks and Shares ISA for longer-term goals.
How do I choose a platform?
Platform charges vary significantly and have a major impact on long-term returns. Key things to compare:
- Annual platform fee — typically charged as a percentage of your portfolio or a flat monthly fee
- Fund dealing charges — some platforms charge per transaction, others don’t
- Fund range — check your chosen funds are available
- Minimum investment — some platforms require a minimum lump sum or monthly direct debit
Percentage-based fees favour smaller portfolios; flat fees become more cost-effective as your portfolio grows. Always check the full fee structure before opening an account.
Why is a Stocks and Shares ISA more important from April 2027?
From April 2027, the Cash ISA allowance for under-65s reduces from £20,000 to £12,000. The overall ISA allowance stays at £20,000 — meaning the remaining £8,000 can only go into a Stocks and Shares ISA, Lifetime ISA, or Innovative Finance ISA. This means more savers will need to engage with investment ISAs whether they planned to or not. For full details, see our guide to the Cash ISA allowance cut 2027.
Frequently asked questions
Can I lose money in a Stocks and Shares ISA?
Yes. Unlike a Cash ISA, the value of a Stocks and Shares ISA can fall as well as rise. You could get back less than you invested. This is why it’s best suited to money you can leave invested for at least five years.
Can I have both a Cash ISA and a Stocks and Shares ISA?
Yes — you can contribute to both in the same tax year, as long as your combined contributions don’t exceed £20,000.
Can I withdraw from a Stocks and Shares ISA?
Yes — you can withdraw at any time. Unlike a pension, there is no minimum access age. Withdrawals are tax-free and do not count toward your annual ISA allowance (unless it’s a flexible ISA).
How much does a Stocks and Shares ISA cost?
You pay the platform’s annual fee plus the ongoing charges of your chosen funds. A typical low-cost setup might cost 0.25–0.45% per year in total. Always compare platforms before opening an account.