Lifetime ISA Calculator

The government adds 25% free to your LISA savings — up to £1,000 a year. Here's what you'd build, and the rules that catch people out.

Tembo research: only ~17% of first-time buyers use a LISA, missing thousands in free money

Your details

Open between 18–39, contribute until 50

Your saving

Monthly contribution £333
£0£167£333 (max)
Maximum £4,000/year = £333.33/month for the full £1,000 bonus. Type 333.33 here for the exact max (the slider rounds to whole pounds).
Years until you buy / withdraw 5 years
1yr10yr20yr

Growth

Cash LISA headline rates are around 4–5.8% (often including a one-year bonus; the ongoing rate is lower, ~2.8–4%). Stocks & shares LISA varies — your assumption. Growth is on top of contributions and bonus.
LISA can only be used for first homes up to £450,000
LISA value after 5 years
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Free government money
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Bonus you'd never get in a normal savings account
Where the money comes from
Your contributions—
Government bonus (25%)—
Interest / growth—
Total LISA value—
Your LISA growing
Contributions, bonus and growth stacked over time
What this means Enter your details above.
The withdrawal trap If you take money out for anything other than a first home (under £450,000) or retirement after 60, you pay a 25% charge on the whole pot. That doesn't just remove the bonus — it takes 6.25% of your own money too. On £10,000 saved you'd lose £625 of your own cash.
Rules worth knowing • Must be open 12 months before you can buy with it
• Property cap is £450,000 — frozen since 2017, even in London
• You can contribute until age 50; growth and withdrawals are tax-free
• Being replaced by a First-Time Buyer ISA in April 2028, but existing holders can keep contributing
• The replacement is under government consultation (opened June 2026). Early plans suggest it would pay the 25% bonus as a lump sum at purchase rather than monthly — so opening a LISA now captures monthly compounding the new product may not offer
For illustrative purposes only. Not financial advice.
LISA rules per HMRC, 2026/27. The £450,000 cap and 25% bonus are current; the replacement product is under consultation (June 2026) and rules may change.
Growth assumes contributions spread evenly across each year. Real returns vary, especially for stocks & shares LISAs.