Continue your plan
Useful next calculations
Rates & sources2026/27
Lifetime ISA contribution and government-bonus rules. The projected return, if any, is entered by you and is not a rate forecast.
| Band / figure | Rate |
|---|---|
| Annual LISA contribution cap | £4,000 |
| Government bonus | 25% of eligible contributions |
| Maximum annual bonus | £1,000 |
| First-home price limit | £450,000 |
Source: GOV.UK — Lifetime ISA — source checked for 2026/27.
When to use this calculator
- Before choosing between saving, investing or changing a contribution.
- When you want to compare cautious, base and optimistic return assumptions.
- When you need a projection before making a longer-term decision.
- When you want to see whether starting earlier or contributing more changes the outcome more.
A realistic UK planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
| Input | Value |
|---|---|
| Planned LISA contribution each tax year (£) | £250 per month |
| Contribution horizon (years) | £250 per month |
| Current LISA balance (£, optional) | £1,400 |
| Assumed annual return (%) | 0 |
After entering these figures, review lisa contributions modelled, government bonus and projected balance together rather than in isolation. Then rerun the tool with one input adjusted.
How to read your results
LISA Contributions Modelled
The figure produced by this output for the inputs you entered. Change one variable at a time if you want to see what drives it.
Government Bonus
The figure produced by this output for the inputs you entered. Change one variable at a time if you want to see what drives it.
Projected Balance
The figure produced by this output for the inputs you entered. Change one variable at a time if you want to see what drives it.
Above Annual LISA Limit
The figure produced by this output for the inputs you entered. Change one variable at a time if you want to see what drives it.
Method & assumptionsAuthoritative sources
This UK-only planner applies the published 25% Lifetime ISA government bonus to the first £4,000 entered for each modelled tax year. It can also apply an annual return you choose, but that return is only an assumption: investments can fall as well as rise and provider charges are not modelled.
It does not decide whether you can open, contribute to, use or withdraw from a Lifetime ISA. GOV.UK sets conditions including opening the account before age 40, contribution and bonus eligibility until age 50, a £450,000 first-home limit and a 12-month holding period for a qualifying first-home purchase. Check the current rules, your provider and a conveyancer or regulated adviser where appropriate.
Official references
Common mistakes
- !Assuming a constant return without checking a more conservative growth rate.
- !Forgetting ongoing contributions, fees or tax wrappers where relevant.
- !Focusing only on the final balance instead of the path required to reach it.
- !Ignoring the drag of charges over a long period.
What to do next
- Test a cautious, expected and optimistic growth rate.
- Compare this result with related savings or retirement tools before committing more money.
- Consider charges and any tax wrapper that applies.
- If the projected balance falls short, increase the contribution until the result meets your goal.
Frequently asked
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