Stocks and Shares ISA Guide

What Is a Stocks and Shares ISA?

An ISA (Individual Savings Account) is a tax wrapper. Any investments held inside it grow completely tax-free. You pay no capital gains tax when you sell at a profit, no tax on dividends, and no income tax on interest from bonds.

The annual ISA allowance for 2025/26 is £20,000. This is shared across all ISA types (Cash ISA, Stocks and Shares ISA, Lifetime ISA, Innovative Finance ISA). You can split it however you like, but the total cannot exceed £20,000.

ISA vs General Account: The Tax Difference

The tax savings compound over time. The earlier you start using your ISA allowance, the more you save. Even if you can only invest £100/month, put it in an ISA.

What Can You Hold in an ISA?

• •UK and international shares (individual stocks)
• •Exchange-traded funds (ETFs)
• •Investment trusts
• •OEIC/unit trust funds
• •Government and corporate bonds

You cannot hold: cryptocurrency, CFDs, spread bets, options, or futures in an ISA.

Best Stocks and Shares ISA Providers

• 1.Vanguard — 0.15% platform fee, free trades on Vanguard funds. Best for passive investors.
• 2.Trading 212 — free ISA, no commissions, fractional shares. Best for beginners.
• 3.InvestEngine — free managed portfolios, 0% platform fee on DIY. Best for hands-off investors.
• 4.AJ Bell — 0.25% platform fee, wide selection. Best for experienced investors.

ISA Rules to Know

• •You can only pay into one Stocks and Shares ISA per tax year (April to April)
• •Unused allowance does not roll over — use it or lose it
• •You can transfer previous years' ISAs between providers without affecting your allowance
• •Withdrawals from a flexible ISA can be replaced in the same tax year without using allowance
• •ISAs are not subject to inheritance tax if left to a spouse (via APS)