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ISA Guide

Individual Savings Accounts (ISAs) are tax-efficient wrappers that allow UK residents aged 18 and over to save and invest without paying Income Tax or Capital Gains Tax on returns. For the 2025/26 tax year, the overall ISA subscription limit is £20,000. You can split this allowance across different types of ISA, but you cannot subscribe more than £20,000 in total across all your ISAs in a single tax year. ISAs run from 6 April to 5 April, and unused allowances do not carry forward.

Cash ISA

A Cash ISA works like a standard savings account but interest is paid tax-free. You can hold cash in easy-access accounts, fixed-rate bonds, or notice accounts. Cash ISAs are offered by banks, building societies, and some fintech providers. Interest rates vary, so it pays to shop around. Unlike a standard savings account, the interest you earn in a Cash ISA does not count towards your Personal Savings Allowance — there is simply no tax to pay. You can transfer your Cash ISA to a different provider at any time without losing its tax-free status.

Stocks & Shares ISA

A Stocks & Shares ISA lets you invest in shares, funds, investment trusts, ETFs, gilts, and bonds. All capital gains and income within the wrapper are free from CGT and Dividend Tax. This makes it the most powerful tool for long-term investing for most people. You can choose a platform (e.g. Hargreaves Lansdown, Vanguard, AJ Bell, Fidelity) and build your own portfolio, or choose a ready-made managed portfolio. The annual platform fee and fund charges reduce your returns but are not separately tax-deductible. For the 2025/26 tax year, the dividend allowance outside an ISA has fallen to just £500, making the ISA even more attractive for income-focused investors.

Lifetime ISA

The Lifetime ISA (LISA) is available to those aged 18 to 39. You can contribute up to £4,000 per tax year (which counts towards your overall £20,000 ISA allowance) and the government adds a 25% bonus — up to £1,000 per year. The money can be used to buy your first home (worth up to £450,000) or withdrawn from age 60. Withdrawals for any other purpose incur a 25% charge (effectively clawing back the bonus plus a small penalty). The LISA is particularly attractive for first-time buyers who are confident they will buy within the price cap. It is also a useful retirement savings vehicle alongside a pension, especially for basic-rate taxpayers who have maximised their employer pension match.

Innovative Finance ISA

The Innovative Finance ISA (IFISA) allows you to lend money through peer-to-peer lending platforms, crowdfunding, and other alternative finance arrangements. Returns are tax-free. IFISAs are higher risk than Cash ISAs — your capital is at risk, and you may not have access to your money when you need it. The IFISA market has contracted since the FCA introduced tighter regulations, but several platforms still offer them. Investments are typically not covered by the Financial Services Compensation Scheme (FSCS).

Junior ISA

A Junior ISA (JISA) is for children under 18. The annual subscription limit is £9,000 for the 2025/26 tax year. Anyone can contribute — parents, grandparents, friends — but the child controls the account from age 16 and can withdraw from age 18. JISAs come in Cash and Stocks & Shares variants. Unlike a Child Trust Fund (CTF), any child born after 2 January 2011 who does not have a CTF can open a JISA. CTFs can be transferred into a JISA to benefit from lower fees and a wider investment choice.

ISA Transfers

You can transfer your ISA from one provider to another at any time. If you want to subscribe to a new ISA in the same tax year, you must transfer the current year's subscription — you cannot simply withdraw and re-subscribe (this would count as a new subscription and potentially breach your allowance). Most providers handle transfers through a formal transfer process that preserves tax benefits. Cash ISA transfers typically take 7–15 working days; Stocks & Shares ISA transfers can take longer, especially if the new provider does not offer the same investments and assets must be sold.

Flexible ISAs

Some ISAs are "flexible" — they allow you to withdraw money and replace it within the same tax year without affecting your annual allowance. For example, if you have subscribed £10,000 and withdraw £4,000, you can pay the £4,000 back in later and still have £10,000 of your allowance remaining. Not all ISAs offer flexibility, so check the terms before opening an account. The government introduced flexibility to make ISAs more suitable for short-term saving as well as long-term investing.