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Fixed and Variable Cash ISA

Earn a consistently competitive rate of interest and see your savings grow. Existing customers can benefit from loyalty rates.

Earn 4.93% AER*/Tax-Free/Fixed Rate on a one-year Fixed Rate ISA term.

This is a Fixed Rate ISA where your investment and interest is fixed for a period of time and early closure is subject to 180 days loss of interest. The Variable Rate ISA will automatically open to facilitate your account opening and transfer at maturity.

(If you are looking for more flexibility in accessing your money, you may find our more suitable.)

Why choose Cynergy Bank's Fixed and Variable Cash ISA?


Cynergy Bank was highly commended in the category of ‘Best Notice Account Provider’ at the Savings Champion Awards 2024. Read more

4.93% AER* Tax-free / Fixed Rate

Earn 4.93% AER* Tax-free on the one year Fixed Rate ISA term. Scroll down for other terms and rates, including loyalty rates for existing customers.

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Watch your money grow on our new mobile banking app for personal customers.

Is this account suitable for you?

The Fixed and Variable Rate ISA is suitable if you want a long-term investment, with a guaranteed return at the end of the term.

This ISA is suitable if you pay tax on your savings and you are a UK resident for tax.

The Fixed and Variable Rate ISA is not suitable if you want instant access to your savings.

This account may not be suitable if you're concerned about interest rates changing.

Things to consider before you apply

  • You must provide a National Insurance Number to apply.

  • If you apply for a fixed rate term, we’ll also open a variable rate ISA for you but you don’t need to use it.

  • Early closure of a fixed rate term is subject to 180 days loss of interest.

  • You can make withdrawals from the variable rate ISA at any time, without notice or charge. The variable rate ISA has an interest rate of 1.00%.

  • To access your account online you will need to use an authentication device.

  • You can only open one Cash ISA a year, but it is possible to transfer to another Cash ISA or a Stocks and Shares ISA with another provider during the tax year.

  • Any funds withdrawn from the account cannot be replaced in the same tax year.

Apply in minutes

Before applying

Please read the  along with the and the Summary Box before applying, to ensure you understand the features and conditions of the account.

To open an account online, you need to be:

  • A personal banking customer;

  • 18 years old or over; and

  • A UK resident for tax purposes.

You will need:

  • National Insurance Number

  • Your mobile phone number and email address

  • Between £500 and £20,000 for a new investment, or £500 and upwards for a transfer.

Existing customers

If you're already a Cynergy Bank customer you can open an Online ISA using our quick and easy Fast Track Apply in Online Banking. Take me to Online Banking

Please read the important information below before applying:

Please note that information in the Summary Box is a summary of the key features of the account and is not intended to be a substitute for reading the Terms and Conditions.

Apply for Fixed Rate and Variable Rate ISA

Fixed Rate and Variable Rate ISA terms and conditions

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Start your Fixed Rate and Variable ISA application

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Summary Box for Fixed and Variable Rate Cash ISA

Notes and definitions

* AER stands for Annual Equivalent Rate and illustrates what the interest rate would be if interest was paid and compounded once each year.

Ways you can contact us

Phone us

0345 850 5555 (or +44 (0) 20 3375 6422 if you're calling from outside the UK)

Email us

using our online form.

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