How the Lifetime ISA Works
The Lifetime ISA is one of the most generous savings schemes the UK government has ever offered — but it comes with strict rules. Save up to £4,000 per tax year and the government adds a 25% bonus on top, paid monthly. The money grows tax-free, and you can withdraw it penalty-free after age 60 for any purpose, or before 60 to buy your first home. Withdraw for any other reason before 60 and you pay a 25% government charge on the amount withdrawn, which is more than the 25% bonus you received — because the charge applies to the full withdrawal, not just the bonus portion.
What Is a Lifetime ISA (LISA)?
A Lifetime ISA is a UK government savings scheme introduced in 2017 to help 18–39 year-olds save for a first home or for retirement. You can open one through any LISA provider — a bank, building society, investment platform, or stockbroker — and choose whether to hold cash or investments. The choice of underlying asset is yours; the wrapper provides the tax benefits. You can hold a LISA alongside a regular Cash ISA or Stocks & Shares ISA, but your £4,000 LISA contributions count towards your overall £20,000 annual ISA allowance.
Who Can Open a Lifetime ISA?
Anyone aged 18 to 39 inclusive can open a Lifetime ISA. Once open, you can keep paying in and earning the 25% bonus until your 50th birthday — contributions must stop at 50, but the money continues to grow tax-free until you withdraw it. The account stays open after 50; you simply cannot add more. If you open one young and max it out every year from 18 to 50, you will have contributed £128,000 of your own money and received £32,000 in government bonuses, before any investment growth. The calculator shows your projected balance at 60 across your chosen horizon.
When Can I Withdraw Money From a LISA Without Penalty?
There are three penalty-free withdrawal routes. First, at any time after age 60, for any purpose — that is the retirement use case. Second, before age 60, to buy your first home, provided the property is in the UK, costs no more than £450,000, is bought with a mortgage, and the conveyancer handles the LISA withdrawal as part of the purchase. Third, in cases of terminal illness or death (in which case the LISA closes and the balance forms part of your estate). Any other withdrawal before 60 triggers a 25% government charge, calculated on the full amount withdrawn — which is more than the 25% bonus you received, because you got 25% on the contribution but pay 25% on the (now larger) balance.
How Much Does the LISA Bonus Add Up To?
The bonus is 25% of your contributions, capped at £1,000 per tax year (because the contribution cap is £4,000). The bonus is paid monthly, so if you save £333 per month you receive £83 per month in bonus — £4,000 contributions and £1,000 bonus across the year. Over a 32-year contribution window (age 18 to 50), maxing out the LISA every year would generate £32,000 in government bonuses alone. Combined with tax-free investment growth over the same period, the LISA can become a substantial pot for retirement or a first-home deposit — the calculator shows the projected outcome for your specific scenario.
LISA vs Pension — Which Should I Prioritise?
The two serve different purposes and most working adults should have both. A workplace pension with employer matching is almost always the better first call — the employer contribution is free money that dwarfs the LISA bonus. Once you are maximising employer pension matching, the LISA becomes attractive for additional retirement saving because it offers tax-free growth and the 25% bonus, with no income-tax relief clawback at withdrawal (unlike a pension, where 75% of withdrawals are taxed as income). The LISA is also uniquely useful for first-home buyers under 50, since the bonus effectively boosts the deposit. Use this calculator alongside our pension calculator and regular ISA calculator to plan the right split.
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Disclaimer: Finance Atlas is not regulated by the FCA. Estimates only, not financial advice. Always consult a qualified, FCA-regulated adviser for your personal circumstances.