skip to main content
ISA Calculator /

ISA interest calculator

See how much your ISA could be worth.

Try our free ISA interest calculator

Click here for our free ISA Calculator »

Our free ISA interest calculator lets you see how much your ISA could be worth in future. This is intended to give you an idea of how much interest you could earn on your tax-free savings over the term of a particular ISA and how much you will end up with in total savings.

There are a wide range of different ISA providers and types of ISAs, including cash ISAs, stocks and shares ISAs and innovative finance ISAs. Our ISA calculator makes it easy to compare how much you might earn with different ISAs in just seconds.

ISA investment plan

Benefits of calculating your ISA interest

The ISA calculator allows you to look at how much growth you will see with different levels of investment, interest and lengths of savings terms.

This means you can work out how much you are likely to earn based on how much you can afford to save or you can see out how much you will need to save to hit a specific target.

The calculator makes it easy to compare how different ISAs will match your savings goals, by looking at how the different interest rates offered by various ISAs will impact the growth of your savings.

What you need to know when using our ISA calculator

The interest rates suggested for your ISA savings with this calculator are based on several assumptions, so should be taken as estimates only.

This figures offered by our ISA calculator assume:

  • You will deposit money into your account on a regular basis
  • There will be no withdrawals made
  • The market will stay broadly steady
  • Interest rates will remain productive
  • There will be no reduction in the ISA tax-free savings allowance during the term of your account

See how much interest you could earn with a tax-free ISA

Want to know how much you could earn in tax-free savings? Try out our free ISA calculator now.

Click here for our free ISA Calculator »

Cash ISAs

ISAs are a tax-advantageous way to save or invest, check out some of the ISA options below

ISAs Products

Fund ISAs

There are a range of types of fund ISA

Fund ISAs: 

Stocks & Shares ISAs

Types of Stocks and Shares ISA include: 

Stocks and Shares ISAs

Latest News

What is the best investment ISA?

20th June 2017

People often ask: “what is the best investment ISA?” The answer to this question is not a simple one, with the best investment ISA for you depending on a number of factors. 

Newsletter Signup

Sign up to our Newsletter to get exclusive news and offers direct to your inbox.

About us

ISA.co.uk is a trading style of Fair Investment Company.

We've been comparing and recommending ISAs for many years so you can trust you're in good hands.

About us

4.89 Average

35 Reviews

Paul

Very informative, find myself a good ISA account with best return in terms of interest.