Building Wealth · UK

ISAs in 2026: Which of the Four Types Should You Use?

An ISA is the UK's simplest tax shelter: everything inside grows and pays out completely free of income tax and capital gains tax, with no paperwork at withdrawal. The catch is the annual allowance — and choosing the right wrapper for the job. Here's how the four types compare under the 2026/27 rules.

The four ISAs at a glance (2026/27)

Type	Annual limit	Best for
Cash ISA	Within the £20,000 overall allowance	Emergency fund, money needed within ~5 years
Stocks & Shares ISA	Within £20,000	Long-term investing (5+ years)
Lifetime ISA (LISA)	£4,000 (counts toward the £20,000)	First home up to £450,000, or retirement from 60
Junior ISA	£9,000 per child (separate allowance)	Money locked to the child until 18

The £20,000 allowance resets every 6 April and is use-it-or-lose-it — unused allowance doesn't carry forward. Since 2024 you can pay into multiple ISAs of the same type in one year (except LISAs), which makes rate-chasing on cash easier.

The LISA's 25% bonus — and its trap

• Open between 18 and 39; pay in up to £4,000/year until 50 and the government adds 25% — up to £1,000/year free.
• Penalty-free withdrawals only for a first home up to £450,000 or from age 60.
• Withdraw for anything else and the 25% charge claws back the bonus plus ~6.25% of your own money. It's a commitment device, not a savings account.
• Buying above £450,000 (common in London)? The cap hasn't moved since 2017 — check expected purchase price before locking money in.

A sensible filling order for most people

• 1. Workplace pension to the full employer match — unmatched ISA savings can't beat free employer money.
• 2. LISA £4,000 if you're saving for a qualifying first home — the 25% bonus is unbeatable for that goal.
• 3. Cash ISA for your emergency fund — 3–6 months of essential spending, instant access.
• 4. Stocks & Shares ISA for everything long-term beyond that, up to the £20,000 ceiling.

Sources

• GOV.UK — Individual Savings Accounts: how ISAs work (£20,000 allowance)
• GOV.UK — Lifetime ISA (£4,000 limit, 25% bonus, £450,000 property cap, withdrawal charge)
• GOV.UK — Junior ISA (£9,000 allowance); Personal Savings Allowance

Figures as of June 2026 (2026/27 tax year). Allowances and rules can change at any Budget — verify on GOV.UK. This is general information, not regulated financial advice (FCA).