Lifetime ISA Calculator UK
Work out how much your Lifetime ISA (LISA) could be worth, including the 25% government bonus of up to £1,000 a year. Project your pot for a first home or retirement and see the bonus, growth and early-withdrawal charge.
Calculator
What this means
A Lifetime ISA lets 18–39 year-olds save up to £4,000 a year towards a first home or retirement, and the government adds a 25% bonus — up to £1,000 each tax year. You can pay in until age 50. Withdraw for a first home worth up to £450,000 or from age 60 and it's tax-free; take money out for any other reason and a 25% charge applies, which can leave you with less than you paid in.
How to use this calculator
- Enter how much you plan to pay into your Lifetime ISA.
- See the 25% government bonus added.
- Project the total over several years.
Worked example
You pay in the full £4,000 in a tax year.
- The government adds a 25% bonus.
- £4,000 × 25% = £1,000 bonus.
You'd have £5,000 added to your LISA that year before any growth.
Who this is for
- First-time buyers saving for a deposit.
- Younger savers building a retirement pot.
- Anyone aged 18–39 considering opening a LISA.
How the Lifetime ISA works
You can pay up to £4,000 a year into a Lifetime ISA (within your £20,000 ISA allowance) and the government adds a 25% bonus — up to £1,000 a year. You must be 18–39 to open one and can pay in until age 50.
Use it to buy a first home worth up to £450,000, or withdraw from age 60 for retirement. Other withdrawals usually face a 25% charge, which can return less than you paid in.
Frequently asked questions
The government adds 25% on top of what you pay in, up to £1,000 a year. Pay in the full £4,000 annual limit and you get the maximum £1,000 bonus, paid monthly.
You can open a Lifetime ISA if you're aged 18 to 39. Once open, you can keep paying in and earning the bonus until the day before you turn 50. The £4,000 you save counts towards your overall £20,000 ISA allowance.
If you withdraw before age 60 for anything other than buying your first home (up to £450,000), you pay a 25% government charge on the amount taken out. Because the charge applies to your bonus and contributions, you can get back less than you originally paid in.
It must be your first home, cost £450,000 or less, be bought with a mortgage, and the account must have been open for at least 12 months. Both first-time buyers in a couple can each use their own LISA towards the same property.
If you withdraw for anything other than a first home (up to £450,000) or retirement from age 60, a 25% charge applies — which can leave you with less than you contributed.
Yes. The £4,000 LISA limit sits within your overall £20,000 ISA allowance, so you can split the rest across cash or stocks and shares ISAs.
Disclaimer
This calculator provides estimates for guidance only. It is not financial, legal or tax advice. Always check official sources or speak to a qualified professional before making decisions.
Related tools
ISA Allowance Calculator UK
See how much of your annual ISA allowance remains.
Open calculator →Savings Goal Calculator UK
Work out how much to save each month to hit a target amount.
Open calculator →Compound Interest Calculator UK
See how savings and investments grow with compound interest.
Open calculator →Mortgage Affordability Calculator UK
Estimate how much you could borrow and the property price you can afford.
Open calculator →