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Lifetime ISA Calculator
Project your LISA to age 60 or a first home, watch the 25% bonus build up, and see exactly what an early withdrawal would cost.
The Rule Most Calculators Skip
A 25% Charge Undoes More Than a 25% Bonus
Bonus (25%) = £1,000 → pot £5,000
Charge (25% of £5,000) = £1,250
You receive £3,750 — down £250
The bonus is 25% of what you paid in; the charge is 25% of a bigger number. Take money out for anything other than a first home, age 60 or terminal illness and you lose roughly 6.25% of your own savings on top of the entire bonus.
The Age Cliffs
Three ages decide what a Lifetime ISA is worth to you. You must make your first payment before 40. You can keep paying in, and keep earning the bonus, until 50. You can withdraw without charge from 60. Opening one at 39 with a single pound is a common move — it keeps the option open for the following eleven years of bonuses.
Where It Fits Alongside a Pension
Taxed at Opposite Ends
A Lifetime ISA is bonused on the way in and tax-free on the way out. A pension is relieved at your marginal rate on the way in and taxed on the way out. For a higher-rate taxpayer — and for anyone with an employer match — the pension usually wins the arithmetic. Run both sides with the pension calculator and the contribution optimiser.
It Is Still a Portfolio
A stocks-and-shares Lifetime ISA holds real funds, with real allocation and real risk. The bonus does not change that. Once the pot is meaningful, look at what is actually inside it with the portfolio calculator, and keep it on target with the rebalancing calculator.
See your ISA next to everything else
This calculator projects one wrapper in isolation. ARIA imports your actual holdings from AJ Bell, Interactive Investor and Interactive Brokers, then shows your allocation and risk across every account at once — ISA, SIPP and general investment account together.
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