Use this Lifetime ISA calculator to estimate your savings growth, government bonus, and
whether your plan fits current LISA rules for first-home or retirement use.
Estimated balance
£0
Based on your age, contributions, growth rate, and time period
Lifetime ISA projection
Government bonus
£0
Your contributions
£0
Growth
£0
Age at end
0
Withdrawal charge
£0
Lifetime ISA balance over time
Yearly breakdown
Year
Contributions
Bonus
Growth
Closing balance
Assumptions
Estimates use current Lifetime ISA rules, assume a fixed growth rate, and do not include
provider fees, inflation, or policy changes. For annual caps, this calculator assumes your
plan starts at the beginning of a tax year.
How a Lifetime ISA works
A Lifetime ISA, often shortened to LISA, is a UK savings or investment account designed for
two main goals: buying a first home or saving for later life. Eligible contributions receive
a 25% government bonus, which can make the account especially useful for long-term saving.
This calculator models a Lifetime ISA month by month so you can see how your own
contributions, the government bonus, and growth combine over time. It is built for planning
rather than product comparison, so the aim is to show clear trade-offs rather than overwhelm
you with detail.
Lifetime ISA bonus explained
The standard Lifetime ISA bonus is 25% of eligible contributions, up to a maximum bonus of
£1,000 per tax year. Because the annual LISA contribution limit is £4,000, that is the most
you can normally put in each tax year while still receiving the full bonus.
If your planned saving would go above that annual cap, this calculator shows the
excess clearly and only counts the eligible part within the projection. That keeps the final
balance aligned with the rules people actually need to plan around.
Lifetime ISA age limits
You can usually open a Lifetime ISA between ages 18 and 39 inclusive. If you already have an
account, you can normally continue contributing and receiving the bonus until age 50. After
that point, the balance can stay invested or continue earning interest, but new LISA
contributions and bonus payments stop.
This matters when you are projecting over a long time period. A plan that starts before 50
may keep growing long after contributions have stopped, simply because the existing balance
continues to compound.
Using a Lifetime ISA for a first home
A Lifetime ISA can usually be used penalty-free for a qualifying first-home purchase, but the
account normally needs to have been open for at least 12 months and the property price must
be £450,000 or less. This calculator checks those headline rules when you choose first-home
use.
The calculator assumes you are a first-time buyer and that the purchase otherwise meets the
standard scheme conditions. It does not try to model detailed conveyancing or provider timing
differences, because those are better handled later in the buying process.
Lifetime ISA rules summary
The main rules to keep in mind are straightforward: you can usually open a Lifetime ISA
between ages 18 and 39, contribute up to £4,000 per tax year, and receive a 25% government
bonus on eligible contributions. Those contributions also count towards your overall annual
ISA allowance.
For a first-home purchase, the account normally needs to have been open for at least 12
months and the property must cost £450,000 or less. For retirement use, penalty-free access
normally starts from age 60, while non-qualifying withdrawals usually face a 25% charge.
What happens if you withdraw money early
If the withdrawal does not qualify for a first-home purchase, retirement from age 60, or
terminal illness, a 25% withdrawal charge usually applies to the amount taken out. That is
why an early withdrawal can cost more than just the government bonus.
This page estimates the charge on the projected balance when you choose other or early
withdrawal. That gives you a practical sense of what could be lost if the money is needed for
a non-qualifying reason.
What this calculator assumes
Estimates use current Lifetime ISA rules, a fixed annual growth rate, and equal regular
contributions. The model does not include fees, inflation, provider-specific bonus timing,
policy changes, or more complex scenarios such as joint buyers or Help to Buy ISA
interaction.
Because there is no start-month input in this version, annual contribution checks assume the
plan begins at the start of a tax year. The results are designed as a planning aid, not
regulated financial advice.
Frequently Asked Questions
A Lifetime ISA adds a 25% government bonus to eligible contributions, up to a maximum
bonus of £1,000 per tax year. That means you can contribute up to £4,000 per tax year and
receive up to £1,000 in bonus.
No. Under current standard rules, you can only open a new Lifetime ISA if you are aged 18
to 39 inclusive. If you already have one, you can usually keep contributing until age 50.
Usually yes, if you are a qualifying first-time buyer, the property costs £450,000 or
less, and the account has been open for at least 12 months. Other scheme conditions may
still apply.
Non-qualifying withdrawals usually face a 25% charge on the amount withdrawn. That charge
can take back the government bonus and part of your own money as well.
Yes. Lifetime ISA contributions count towards your overall annual ISA allowance. For the
2026/27 tax year, that wider ISA allowance is £20,000.
More UK Financial Calculators
Saving for a deposit? Try our savings goal calculator. Want to compare bonus-led saving with
general savings growth? Use the interest calculator too. If you are comparing a Lifetime ISA
with retirement saving, our pension tax relief calculator is a useful side-by-side check. If
you want to compare LISA growth with a tax-free cash wrapper, the Cash ISA calculator is a
useful counterpart. Saving for a child as well? The Junior ISA calculator can help with that
side of your plan too. If you are buying soon, you may also want to estimate your stamp duty
and mortgage costs alongside your LISA plan.