What is a Stocks and Shares ISA?

Full answer

A Stocks and Shares ISA (also called an Investment ISA) is a wrapper that shelters your investments from UK tax. Any capital growth, dividends, or interest generated inside the ISA is completely free from Income Tax, Capital Gains Tax and the Dividend Tax — you never need to report ISA gains or income on a tax return. **Key features for 2026/27:** - **Annual allowance:** £20,000 (shared across all ISA types you hold). - **Eligible investments:** UK and overseas shares, investment trusts, OEICs, unit trusts, ETFs, gilts, corporate bonds, and some AIM-listed shares. - **Providers:** Banks, stockbrokers, investment platforms (Hargreaves Lansdown, AJ Bell, Vanguard, Freetrade etc.). - **FSCS protection:** Up to £85,000 per FSCS-authorised provider for cash balances; share holdings are segregated client assets (not covered by the £85,000 FSCS limit in the same way, but protected if a firm goes insolvent). **Transfers:** You can transfer a Stocks and Shares ISA to another provider at any time without losing ISA status. Never withdraw and reinvest — you permanently lose the ISA allowance already used. **ISA vs GIA (General Investment Account):** Outside an ISA, gains above the £3,000 CGT Annual Exempt Amount are taxed at 18% (basic) or 24% (higher rate); dividends above £500 at 8.75%/33.75%. Inside an ISA, these taxes never arise. **ISA vs SIPP:** A SIPP gives upfront tax relief on contributions but income is taxed in retirement. An ISA gives no upfront relief but all withdrawals are tax-free. For most basic-rate taxpayers both are worth using; higher-rate taxpayers may prefer to maximise SIPP contributions first. **Best suited to:** Investors with a 5+ year horizon who want to avoid tax drag on compound growth.

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Related guides

• Isa Types Explained
• Uk Tax On Savings And Investments 2026