🏡 UK Lifetime ISA (LISA) Calculator: 25% Bonus

The government adds £1 for every £4 you save. See what that becomes.

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Use about 4% for a cash LISA, 5–7% for a stocks and shares LISA.

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Fill in the details and click Calculate to see your results.

Formula at a glance

UK Lifetime ISA Calculator: Each year — (balance + deposit × 1.25) × (1 + growth). Example: £4,000 a year for 5 years for a first home → Value after 5 years: £28,165
How the UK Lifetime ISA Calculator works: Each year — (balance + deposit × 1.25) × (1 + growth)

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📘 About the UK Lifetime ISA

A Lifetime ISA lets people aged 18 to 39 open an account and save up to £4,000 a year until they turn 50. The government adds a 25% bonus — up to £1,000 a year. You can use the money to buy a first home costing up to £450,000, or take it out tax-free from age 60.

Taking money out for any other reason costs 25% of the amount withdrawn, which wipes out the bonus and some of your own money. The LISA counts towards your £20,000 yearly ISA allowance.

🧮 Formula

Each year
(balance + deposit × 1.25) × (1 + growth)
Bonus
25% of deposits, max £1,000 a year

✏️ Worked examples

£4,000 a year for 5 years for a first home

You enter
Your age25 years
Already in your LISA0 £
You pay in each year (max £4,000)4,000 £
Yearly growth (after fees)4%
Using it forBuying my first home
Years until you buy (home)5 years
You get
Value after 5 years£28,165
You pay in£20,000
Government bonus (25%)£5,000
Growth£3,165
If you withdraw for another reasonYou lose 25% of the amount — £7,041 here (more than the bonus)
Home ruleFirst home, price up to £450,000, account open at least 12 months

£28,165.

Age 25, saving for retirement at 7%

You enter
Your age25 years
Already in your LISA0 £
You pay in each year (max £4,000)4,000 £
Yearly growth (after fees)7%
Using it forRetirement at 60
Years until you buy (home)5 years
You get
Value at 60£665,649
You pay in£100,000
Government bonus (25%)£25,000
Growth£540,649
If you withdraw for another reasonYou lose 25% of the amount — £166,412 here (more than the bonus)

£665,649 at 60.

🧭 How to use this calculator

What you enter

  • Your age (years)
  • Already in your LISA (£)
  • You pay in each year (max £4,000) (£)
  • Yearly growth (after fees) (%)Use about 4% for a cash LISA, 5–7% for a stocks and shares LISA.
  • Using it for
  • Years until you buy (home) (years)

What you get

  • Value after 5 years
  • You pay in
  • Government bonus (25%)
  • Growth
  • If you withdraw for another reason
  • Home rule

❓ Frequently asked questions

How much bonus do you get on a Lifetime ISA?

25% of what you pay in, up to £1,000 a year on the £4,000 maximum. Bonuses are paid monthly.

What is the Lifetime ISA house price limit?

£450,000. Your account must have been open for at least 12 months before you use it to buy.

What happens if I withdraw from a Lifetime ISA early?

You pay a 25% charge on the amount withdrawn, so on £1,250 (your £1,000 plus £250 bonus) you get back £937.50.

Can I have a Lifetime ISA and a Help to Buy ISA?

You can hold both, but only use the bonus from one of them to buy your first home.