
Stay on track the easy way – use our ISA calculator.
The value of your investments and the income from them may go down as well as up, and you could get back less than you invested. Tax treatment depends on the individual circumstances of each client and may be subject to change in the future.
Please read about our ISA calculation assumptions before trying it out.
Please remember all calculations shown here are examples and not intended to forecast the value of your investments or any tax savings.
About our ISA calculations – we have assumed:
Invest how you want and keep your interest and returns tax-free with our low-cost, award-winning ISA. Named 'Best Buy ISA' at the 2024 Boring Money Best Buy Awards.

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Calculations for ISA investment returns depend on 3 factors:
Simple interest is earned on the original investment amount. Compound interest is earned on the original investment amount and the interest, and results in exponential growth.
Yes, if the value of the estate is more than £325,000. If the ISA is passed on to a husband, wife or civil partner they are usually exempt from inheritance tax calculations.