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Compare Cash ISAs /

Cash ISA Calculator

Use our cash ISA calculator to see what your ISA could be worth in the future.

3 Year Fixed Rate Cash ISA

from Ford Money

Interest Rate (AER) 2.00%
  • Term: 3 Years
  • Minimum deposit £500
  • Interest can be paid monthly or annually
  • Unlimited deposits in the first 14 days from application
  • ISA transfers in allowed
  • 14 day cooling off period where you’re free to cancel without charge
  • FSCS Protected
  • Must be UK resident and aged 16 or older
  •  Early withdrawals subject to 270 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

5 Year Fixed Rate Cash ISA

from Leeds Building Society

Interest Rate (AER) 2.00%
  • Term: 5 Years
  • Interest paid annually
  • ISA transfers also allowed in
  • Open online, in branch or by post
  • FSCS Protected
  • Must be UK resident and be aged 18 or older
  • Withdrawals permitted subject to 365 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

2 Year Fixed Rate Cash ISA

from Ford Money

Interest Rate (AER) 1.90%
  • Term: 2 Years
  • Minimum deposit £500
  • Interest can be paid monthly or annually
  • Unlimited deposits in the first 14 days from application
  • 14 day cooling off period where you’re free to cancel without charge
  • ISA transfers in allowed
  • FSCS Protected
  • Must be 16 or over to apply
  •  Early withdrawals subject to 180 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

3 Year Fixed Rate Cash ISA

from Leeds Building Society

Interest Rate (AER) 1.85%
  • Term: 3 Years
  • Interest paid annually
  • ISA transfers also allowed in
  • Open online, in branch or by post
  • FSCS Protected
  • Must be UK resident and be aged 18 or older
  • Withdrawals permitted subject to 240 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

2 Year Fixed Rate Cash ISA

from Leeds Building Society

Interest Rate (AER) 1.75%
  • Term: 2 Years
  • Interest paid annually
  • ISA transfers also allowed in
  • Open online, in branch or by post
  • FSCS Protected
  • Must be UK resident and be aged 18 or older
  • Withdrawals permitted subject to 150 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

1 Year Fixed Rate Cash ISA

from Leeds Building Society

Interest Rate (AER) 1.50%
  • Term: 1 Year
  • Interest paid annually
  • ISA transfers also allowed in
  • Open online, in branch or by post
  • FSCS Protected
  • Must be UK resident and be aged 18 or older
  • Withdrawals permitted subject to 60 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

1 Year Fixed Rate Cash ISA

from Ford Money

Interest Rate (AER) 1.40%
  • Term: 1 Year
  • Minimum deposit £500
  • Interest can be paid monthly or annually
  • Unlimited deposits in the first 14 days from application
  • 14 day cooling off period where you’re free to cancel without charge
  • ISA transfers in allowed
  • FSCS Protected
  • Must be 16 or over to apply
  •  Early withdrawals subject to 90 days lost interest

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

1 Year Triple Access Cash ISA

from Nationwide

Interest Rate (AER) 1.00%
  • Term: 1 Year, with option to make three free withdrawals
  • Make up to three withdrawals during the 12-month term of this account
  • Open with £1 or transfer in existing ISA funds
  • Manage your account online
  • Interest paid at maturity
  • FSCS Protected
  • Must be UK resident and aged 16 or older
  • Make more than three withdrawals and the rate drops to 0.01% AER/gross p.a. (variable)
  • Not available in branch

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

Flexible Cash ISA

from Ford Money

Interest Rate (AER) 0.85%
  • Term: Easy Access
  • Minimum deposit £1
  • Interest can be paid monthly or annually
  • Flexible ISA - you can replace any cash you withdraw from your ISA within the same tax year without it counting towards your annual ISA allowance
  • Unlimited deposits and withdrawals permitted
  • ISA transfers in allowed
  • FSCS Protected
  • Must be 16 or over to apply

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

Online Easy Access Cash ISA

from Leeds Building Society

Interest Rate (AER) 0.71%
  • Term: Easy Access
  • Interest paid annually
  • Unlimited deposits and withdrawals
  • ISA transfers also allowed in
  • Open and manage online
  • FSCS Protected
  • Must be UK resident and be aged 18 or older

Calculate your interest with this plan

Your savings:
£
You could gain:
£0.00 (per tax year)

Cash ISA Calculator

Click here for ISA Calculator »

A cash Individual Savings Calculator is a program, mostly online, that helps you determine how much interest you could gain as interest on an ISA investment. While these tools only give a projection of the amount, they give valuable insight as to whether a certain interest rate is favorable and how much should be invested into the ISA regularly to give the best interest gains. A cash ISA calculator should not be used as the final determinant or decision maker when it comes to committing to a cash ISA. This is because it operates on assumptions to calculate a possible outcome on investment. That investment may gain more or less than estimated and is not an accurate measure.

Investment ISA Idea

Assumptions made on calculation

One of the assumptions made is that the individual will deposit money into the account on a regular basis. Cash ISAs give a lot of leeway when it comes to withdrawals and deposits. For that reason, it is not always necessary that an individual deposit money into the account on a regular basis in as long as the final tally on deposits does not exceed the cash ISA allowance limit.

Another assumption is that the market will be steady and the rates will be productive. Capital markets fluctuate all the time throughout the tax year. The market may grow or stunt considerably affecting the economical rates on conversion for the currency. Due to such changes therefore, the interest gained tends to fluctuate.

Another assumption made is that there shall be fixed tax rules throughout the duration of the tax year. The current tax allowance for ISAs exempts them from having to be taxed on interest made. However, the rules might change and in such a scenario, the tax rate could affect the projected figures.

It is also an assumption that there shall be no withdrawals made on the account. Most of the calculators work under the premise of compound interest. A withdrawal, which in reality will happen at one point or the other, has significant impact on interest.

Benefits of a cash ISA calculator

One of the benefits of using a cash ISA calculator is that it helps you predict your annual growth on a certain interest rate. From this prediction, you can then determine whether the interest rate offered is sufficient for your goals or whether you need to find a different rate elsewhere.

An ISA calculator also helps in determining how much money you should deposit on a regular basis, and at what time interval, to make it to the allowance limit, without having to compromise your financial situation.

Click here for ISA Calculator »

James Caldwell
Edited by James Caldwell - ISA.co.uk