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18 Month Fixed Rate cash ISA


Enjoy the comfort of fixed term tax-free interest. Easily transfer in your existing ISAs with the choice of monthly or annual interest payments. You can start saving from £500 - £500,000.

Existing online customer exclusive​

Is this the best cash ISA for you?

  • Freedom to spread your tax-free ISA allowance across multiple ISAs with Paragon’s ISA Wallet
  • Quickly and easily transfer your existing ISAs
  • Manage your account easily online or by post
  • Early withdrawals or closure are subject to a penalty
  • Fixed interest rate for the term of your ISA
FSCS protected small logo
Your eligible deposits with Paragon Bank are protected up to a total of £85,000 by the Financial Services Compensation Scheme (FSCS), the UK's deposit guarantee scheme.

Account summary

Existing online customer exclusive.
Ready to apply?

If you're already an online Paragon customer, you can simply log in to apply for this account.

Power of attorney

If you are applying for this account as a power of attorney, you will need to call our customer services team on 0800 052 2222 to complete your application.

For further information about power of attorney please visit our frequently asked questions.

About your cash ISA


Make your deposit by electronic bank transfer, cheque, from an existing Paragon account or by transferring existing ISAs.

Transferring your ISAs

You can transfer your existing ISAs from other providers. Your current years ISA subscription must be held with one provider, so if you’ve opened and funded an ISA somewhere else this tax year, you’ll need to transfer this year’s allowance in full. However, you can transfer previous years ISA subscriptions freely.


There is a 120 days’ interest penalty for withdrawing from your ISA before the fixed term ends. So, if you close your ISA in the first 90 days, you may get back less than you invested. Please see your Product Terms and Conditions for details.

With Flexible ISAs and our ISA Wallet any amount you withdraw is added back to your annual ISA allowance for you to reinvest with us.

Nominated bank account

To help keep your savings safe, your Paragon accounts must be linked to a nominated bank account. This account must be a UK current account in your name, and we will only accept money from and send your savings to your nominated bank account.

Closing your account

If you change your mind, you have the right to close your ISA within 14 days of us receiving your opening deposit. If closed in this way it won’t count as an ISA subscription.

You can close your ISA by withdrawing all your savings, or it will be closed if it falls below the minimum required balance.

Paragon Bank PLC is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. Registered in England number 05390593. Registered office 51 Homer Road, Solihull, West Midlands B91 3QJ. Paragon Bank PLC is registered on the Financial Services Register under the firm reference number 604551