Lifetime ISA Calculator
Estimate how much your Lifetime ISA could grow based on your starting balance, yearly contributions, investment growth rate and years to save.
Overview
Use this Lifetime ISA Calculator to estimate how much your account could be worth over time. Enter your starting balance, annual contribution, expected growth rate, annual charges and years to save to see the projected final balance, total government bonus and estimated growth.
How it works
The calculator adds your yearly contribution and the 25% government bonus, then applies a net annual growth rate based on your expected return minus annual charges. Your starting balance is compounded over the full period, and yearly additions are projected using compound growth as a series of regular annual deposits. The result is an estimate of your future Lifetime ISA value under steady assumptions.
How to use this calculator
- 1Enter your current Lifetime ISA balance.
- 2Add the amount you expect to contribute each tax year.
- 3Enter your expected annual growth rate.
- 4Include estimated annual charges.
- 5Choose how many years you plan to save.
- 6Review the projected balance, bonus total and estimated growth.
Example Calculation
Starting balance
$5,000
Annual contribution
$4,000
Annual growth rate
4%
Annual charges
1%
Years to save
10
Projected final balance
$65,710
With a £5,000 starting balance, £4,000 added each year, a 25% bonus, 4% annual growth and 0.5% annual charges over 10 years, the projected Lifetime ISA balance is about £61,600.
Frequently asked questions
What does this Lifetime ISA Calculator estimate?
It estimates the future value of a Lifetime ISA based on your starting balance, annual contributions, government bonus, expected growth rate and annual charges.
Does the calculator include the Lifetime ISA government bonus?
Yes. It assumes a 25% bonus on your annual contributions, based on current standard Lifetime ISA rules.
Does it account for investment growth and charges?
Yes. You can enter an expected annual growth rate and annual charges, and the calculator uses the difference as a net annual rate.
Are contributions assumed monthly or yearly?
This version assumes contributions and the related bonus are added once per year, which keeps the estimate simple and consistent.
Does this calculator include withdrawal penalties?
No. It focuses on projected growth while saving and does not subtract any withdrawal charge or penalty.
Can I use this for a cash Lifetime ISA and a stocks and shares Lifetime ISA?
Yes. For a cash Lifetime ISA, you can use an interest-style growth rate. For a stocks and shares Lifetime ISA, you can use an estimated investment return rate.
Explore Related Calculators
Assumptions and warnings
Assumptions
- This calculator assumes a 25% government bonus on eligible contributions.
- Annual contributions are assumed to stay the same each year.
- Growth and charges are applied using a constant annual rate for the full period.
- Contributions and bonuses are treated as being added once per year for estimation purposes.
- Results are estimates and do not include withdrawal charges, tax rule changes or provider-specific features.
Warnings
- This calculator provides an estimate only and is not financial advice.
- Investment returns are not guaranteed and the value of investments can go down as well as up.
- Lifetime ISA rules, limits and eligibility can change, so check current official guidance before acting.