Online Bonus 5 Access Cash ISA

Our Online Bonus 5 Access Cash ISA may be right for you if you want to manage your account online, save when it suits you and prefer the comfort of knowing you can take money out up to five times each tax year.

  Interest rate Balance Gross* each year AER†
Variable - without bonus £1 - £20,000 3.55% 3.55%
Variable - with bonus £1 - £20,000 5.00% 5.00%
  • Open this ISA online.
  • Pay in from £1 to £20,000 in the current tax year.
  • You can only pay your ISA Allowance into one Principality Cash ISA in the current tax year.
  • Transfer in existing ISAs
  • Interest is paid each year on 6th April.
  • You can take money out five times in every tax year
  • Enjoy the benefit of this being a flexible ISA.
  • You can close or transfer this ISA at any time.
  • We can stop accepting applications at any time.



Summary box

Please read the summary box below 

  Summary Box
What is the interest rate? Interest rate without bonus 3.55% Tax-free^ each year / AER† (Variable)

Interest rate with bonus (variable bonus rate of 1.45% included for the first 12 months) 5.00% Tax-free^/AER† (Variable) each year (See the meanings of 'Tax-free' and 'AER' at the bottom of this page)

Interest is calculated each day on the money in the account and paid on 6th April every year.

The interest rate you receive will be the rate with bonus for the first 12 months. After 12 months the rate will change to the rate without bonus. We will notify you before this happens.
Can Principality change the interest rates?
  • Yes, both the interest and bonus rates can go up or down.
  • If you have £100 or more in the account, we will give notice of any reduction in interest or bonus rates at least 14 days before the change takes effect.
  • When the rate changes to the rate without bonus, we will send you a reminder 14 days before this happens, no matter how much money you have in the account.
  • For more information, see the section Changes to interest rates in our Savings Terms and Conditions.
What would the estimated balance be after 12 months based on a £1,000 deposit? Estimated balance after 12 months (interest rate of 5.00% AER, includes variable bonus rate of 1.45% tax-free for 12 months)

Estimated balance after 24 months (only the underlying interest rate of 3.55% AER is paid for months 13 to 24)

This is based on no further money being put in or taken out of the account and no change to the interest rate or bonus rate.
How do I open and manage my account?
  • You must be a UK resident and satisfy the minimum age requirements to open a cash ISA (see your Online Bonus 5 Access Cash ISA account terms).
  • You must open your ISA online.
  • You have to link your Online Bonus 5 Access Cash ISA to a current account in your name with another UK bank or building society in order to move money when you need it.
  • You can't have more than one of this issue number of the Online Bonus 5 Access Cash ISA in your name.
  • You must keep at least £1 (the minimum balance) in the account.
  • You cannot pay in more than the ISA Allowance each tax year. The ISA Allowance for the current tax year (2024/2025) is £20,000. You can only pay your ISA Allowance into one Principality cash ISA in the current tax year.
  • You can transfer unlimited amounts from ISAs from previous tax years (subject to the maximum balance), as these are not part of your current year’s ISA allowance.
  • If your ISA reaches £1,000,000, you cannot pay any more money in.
  • If we do not receive the first payment within five business days of the account opening, we may close it.
  • You must manage the account using the online service Your Account at
    Can I withdraw money?
    • Yes, you can make five withdrawals from the account every tax year or close your ISA at any time using your linked account.
    • You can close or transfer your ISA at any time.
    • This is a flexible ISA. This means you’ll be able to take money out of it and replace that money before the end of the same tax year, without the replacement contributing to your annual ISA allowance.
    Additional information
    • Service charges and costs may apply to the account. These are set out in our Tariff of Charges.
    • In certain circumstances we may refuse an instruction for using an account. These circumstances are set out in our Savings Terms and Conditions.
    • The tax treatment of your savings depends on your individual circumstances and may change in the future. This is set by HM Revenue and Customs (HMRC). Further information can be found at
    • The interest rates quoted above were correct on 04/07/2024.
    Calculate your savings

    Savings calculator

    Please enter amount

    Amount must be less than 1000000

    Please enter amount

    Amount must be less than 1000000

    Please choose a duration

    Please choose a duration


    1. The results displayed were dependent on the information you provided and are for illustrative purposes only and are by no means an indication of being suitable for your individual circumstances.
    2. The calculations assume interest is paid gross* of income tax on the entire balance on an annual basis
    3. It has been assumed that no withdrawals or additional deposits would be made from the account during the saving duration, and that the interest rate also remains the same during this time (note that interest rates on variable rate savings account are subject to change, and when fixed rate deals end, there is no guarantee that the same rate will be available in the future). 

    Before you apply, please read the Online Bonus 5 Access Cash ISA Terms & Conditions

    As you will be bound by the Account Terms and your information is held in accordance with our privacy policy, you should read, print and save the below documents for your records. If you have any queries relating to them please contact us for further information.

    Please also read the following:

    ^Tax-free means UK Income Tax and Capital Gains Tax is not deducted from the interest you earn. This depends on your individual circumstances, and may change in future.

    †AER stands for Annual Equivalent Rate and illustrates what the interest rate would be if interest were paid once each year on the whole balance, including previous interest payments.