Enjoy the freedom of spreading out your tax-free savings allowance

With CustomISA you can spread your annual tax-free allowance across as many Newcastle Building Society ISAs as you like, to meet your individual savings goals.

How does CustomISA benefit me?

  • CustomISA helps you to make the most of your cash ISA allowance by creating a package of accounts to suit your needs.

  • It's ideal for those who would like a savings plan that is more tailored, based on the length of a product or access.

How does CustomISA work?

Each year you're allowed to save a certain amount of money into an ISA (Individual Savings Account) without having to pay any tax on the interest you earn. The allowance for the tax year 2026/2027 is £20,000.

CustomISA lets you spread your allowance across several tax-free accounts ranging from easy access and fixed term accounts to meet your individual savings goals.

Create your own CustomISA

In order to help you choose what ISAs suit your needs we have developed our CustomISA calculator.

The CustomISA calculator allows you to compare and adjust the amounts you put into each account to help you find the perfect CustomISA for you.

With the CustomISA calculator, you can:

  • View and select from our range of ISAs
  • See the average interest rate that can be achieved over your choice of ISAs
  • Email / print a copy for your records

Ready to apply? 

Once you’ve created the perfect CustomISA package you can apply for your ISAs in a number of ways:

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