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SavingThe UK ISA cluster on one page. Provider comparisons for Cash, Stocks and Shares, and Lifetime ISAs; calculators; and the supporting guides covering allowances, tax treatment and provider choice.
Updated for the 2026/27 UK tax year.
The Individual Savings Account is the most powerful tax-free wrapper available to UK savers. The annual ISA allowance is £20,000 across all ISA types combined. Inside any ISA, interest, capital gains and dividends are free of UK tax. The choice between Cash, Stocks and Shares, and Lifetime ISAs is rarely either/or — most UK savers benefit from holding more than one type, allocating contributions based on time horizon and goals.
This hub brings together every ISA-related resource on the site: provider comparisons, calculators, explainers and supporting guides for first-time savers and experienced investors alike.
Cash ISAs hold cash and pay interest, like a tax-wrapped savings account. The right choice for money you will need within five years, for emergency funds once interest crosses the Personal Savings Allowance, and for first-home deposit saving where market exposure is inappropriate.
Stocks and Shares ISAs hold investments — funds, ETFs, shares — and shelter growth, dividends and interest from UK tax. The right wrapper for retirement-horizon money and long-term wealth building, where 10+ year time horizons let market volatility smooth out.
The Junior ISA shelters £9,000 a year of saving on behalf of a UK child under 18. The child takes ownership at 18, when it becomes a normal adult ISA.
The Lifetime ISA adds a 25% government bonus to contributions of up to £4,000 a year. Designed for first-home purchases up to £450,000 or retirement saving from age 60. The wrapper carries a 25% early-withdrawal penalty that effectively costs around 6.25% of your contribution — the maths is important to understand before opening one.
Three tools that cover most ISA decisions:
ISAs do not exist in isolation. For long-term retirement saving, see how the Stocks and Shares ISA compares to a SIPP — both shelter investment growth, but tax timing differs materially. For first-home buyers, the LISA dovetails with mortgage planning: see the Best Mortgage Brokers UK and Stamp Duty Calculator alongside how much house you can afford.
This is general information, not financial advice. Pennywise Finance is not authorised by the Financial Conduct Authority. For decisions involving significant sums, consult an FCA-authorised adviser or the free MoneyHelper service.
For platform-led comparison covering ISA, SIPP and JISA accounts in one place, see Best Investment Platforms UK.