Saving & Investing
See how a Lifetime ISA bonus could help your savings grow.
Estimate your Lifetime ISA value for a first home or later life, including the current government bonus and the years you remain eligible to contribute.
Lifetime ISA Calculator
Model contributions, government bonuses and potential growth.
Compare your contributions, government bonuses and estimated growth.
How your Lifetime ISA could grow
Illustrative year-by-year projection using your contribution window, bonuses and assumed rate.
Try changing your contribution, age, timeframe, assumed rate or Lifetime ISA type.
What determines how your Lifetime ISA could grow?
The projected balance is mainly shaped by how much you contribute, the government bonus added under the rules and the time available for interest or investment growth.
Your contributions
The amount you put into the Lifetime ISA determines the starting point for the bonus and any subsequent growth.
Government bonus
Eligible contributions can receive a government bonus, increasing the amount held before interest or investment growth is considered.
Time and growth
The longer money remains saved or invested, the more opportunity there is for interest or investment growth to build.
How the Lifetime ISA bonus changes the balance
A Lifetime ISA has an extra step that an ordinary savings account or investment account does not: eligible contributions can attract a government bonus under the rules in force.
You contribute
Money is added to the Lifetime ISA, subject to the eligibility and contribution rules that apply at the time.
The government bonus is added
Eligible contributions can receive an additional government bonus under the Lifetime ISA rules.
The combined balance can grow
Contributions and bonuses can then earn savings interest or participate in investment growth, depending on the account.
Growth can continue over time
Future interest or investment returns apply to the money already held within the Lifetime ISA.
The government bonus increases the amount inside the Lifetime ISA, but the eventual value still depends on contributions, time and the interest or investment return achieved.
Contributions, bonuses and growth are different
Your projected balance can contain three different sources of value. Separating them makes the calculator result easier to understand.
Lifetime ISA Explained →Contributions
Money you personally put into the Lifetime ISA.
Government bonus
Additional money added under the Lifetime ISA rules on eligible contributions.
Growth
Interest or investment returns generated by the money already held in the account.
Lifetime ISA rules affect when the money can be used
A Lifetime ISA has eligibility, contribution, bonus and withdrawal rules. The calculator can model the numbers, but the rules determine whether a particular use qualifies.
Eligibility rules apply
Who can open or contribute to a Lifetime ISA depends on the current rules, so eligibility should be checked before relying on a projection.
Contribution and bonus rules apply
The amount that can be contributed and the way bonuses are added are governed by the Lifetime ISA rules in force at the time.
Withdrawal conditions matter
Accessing money outside qualifying circumstances can have financial consequences under the applicable Lifetime ISA rules.
Current limits, ages and other rule values should be treated as live regulatory data rather than fixed permanently in this component.
A government bonus does not remove every limitation
The bonus can increase the amount held inside a Lifetime ISA, but it does not guarantee investment growth or remove the account rules.
The bonus does not guarantee growth
Where investments are held, their value can rise or fall. The government bonus does not remove investment risk.
Access rules matter
Lifetime ISAs are designed around particular qualifying uses, and accessing money outside those circumstances can have consequences under the rules.
The calculator is illustrative
It models the contribution, bonus and growth assumptions entered rather than predicting the exact value you will receive.
Use the calculator as an illustration of Lifetime ISA assumptions, not as a recommendation to open, fund or invest through a Lifetime ISA.
Explore your next question
Once you have modelled a Lifetime ISA, the next useful step is to understand the account rules, the wider ISA allowance and how it fits alongside other ISAs.
Go deeper
These guides explain the Lifetime ISA itself and the wider ISA rules that sit around the calculator.
Lifetime ISA Explained
Understand the purpose of a Lifetime ISA, how the government bonus works and the rules that affect contributions and withdrawals.
Read the guide →Common questions about Lifetime ISAs
These answers cover common questions that arise after modelling contributions, government bonuses and growth in a Lifetime ISA.
What does the Lifetime ISA Calculator show?
It illustrates how contributions, government bonuses and assumed savings or investment growth could combine over time under the assumptions entered.
How does the government bonus affect the balance?
Eligible contributions can attract a government bonus under the Lifetime ISA rules, increasing the amount held inside the account before future growth is considered.
Does the bonus itself earn interest or investment growth?
Once bonus money is added to the Lifetime ISA, it forms part of the account balance and can participate in the interest or investment growth generated by the underlying account.
Is a Lifetime ISA the same as a normal ISA?
No. A Lifetime ISA is a specific type of ISA with additional eligibility, contribution, bonus and withdrawal rules.
Can a Lifetime ISA hold cash or investments?
Lifetime ISAs can be structured around cash or investments, depending on the product. The source of growth and the risks therefore differ.
Does Lifetime ISA growth count towards the contribution limit?
Growth generated inside the account is different from contributions. The applicable contribution limits are governed by the current Lifetime ISA and wider ISA rules.
Can the value of a Stocks & Shares Lifetime ISA fall?
Yes. Investments can rise or fall in value, and the government bonus does not remove investment risk.
Are there restrictions on withdrawing money?
Yes. Lifetime ISA withdrawals are subject to specific qualifying-use and access rules, so the current rules should be checked before withdrawing.
Can Lifetime ISA rules change?
Yes. Eligibility, limits, bonuses and withdrawal rules can change, which is why current government rules should be checked rather than relying on old figures.
Is the Lifetime ISA Calculator financial advice?
No. It is an educational illustration based on the assumptions entered and does not recommend opening, contributing to or investing through a Lifetime ISA.