ISA Guide

An Individual Savings Account (ISA) lets you save or invest money without paying tax on the interest, dividends, or growth. Every UK adult gets an annual ISA allowance — and any unused allowance can't be carried forward.

2024/25 ISA allowance: £20,000 per person. You can split this across different ISA types in the same tax year (6 April to 5 April).

Types of ISA

Cash ISA

Works like a regular savings account but interest is always tax-free. Best for short-term savings or an emergency fund.

Good for: Emergency funds, short-term saving (under 5 years), anyone who pays tax on savings interest
Maximum: £20,000/year (shared with other ISAs)

Stocks and Shares ISA

Your money is invested in funds, shares, or bonds. Higher potential returns than cash but with risk — your investment can go down as well as up. Best held for 5+ years.

Good for: Long-term wealth building, retirement saving alongside a pension
Providers: Vanguard, Hargreaves Lansdown, Moneybox, InvestEngine

Lifetime ISA (LISA)

Designed for buying your first home or saving for retirement (after age 60). The government adds a 25% bonus — free money.

	Detail
Who can open one	Age 18–39
Annual contribution limit	£4,000 (counts toward your £20,000 ISA allowance)
Government bonus	25% (max £1,000/year)
Maximum bonus over lifetime	£33,000
First home price limit	£450,000
Early withdrawal penalty	25% (you lose your bonus AND some of your own money)

LISA trap: The 25% withdrawal penalty means you get back less than you put in if you access it for anything other than a first home or retirement. Only open one if you're confident about the purpose.

Junior ISA (JISA)

Tax-free savings for children under 18. Annual limit: £9,000 (separate from adult ISA allowance). The money belongs to the child and can only be accessed at 18.

ISA vs. Regular Savings Account

Basic-rate taxpayers have a Personal Savings Allowance (PSA) of £1,000/year in interest before paying tax. Higher-rate taxpayers get £500. If your savings interest is below your PSA, a regular account may offer better rates — an ISA becomes more valuable once you exceed it.

FSCS Protection

Cash ISAs with FCA-regulated banks are protected up to £85,000 per institution by the Financial Services Compensation Scheme.

How to Open an ISA

Decide which type suits your goal — cash for short-term, S&S for long-term, LISA for first home or retirement.

Compare providers — look at rates for cash ISAs, fees and fund range for S&S ISAs.

Apply online — takes around 10 minutes. You'll need your National Insurance number and bank details.

Set up a regular contribution if you can — even £25/month adds up significantly over time.

MoneyHelper: ISAs

Government-backed guide to all ISA types.

MoneySavingExpert: Best ISA Rates

Up-to-date best buy tables.

GOV.UK: ISA Rules

Official rules, limits, and transferring ISAs.