What happens if I exceed the maximum annual Cash ISA subscription allowance?

We monitor the total level of deposits made during any tax year and if we receive a payment that takes your account above the maximum annual ISA allowance, we will return the whole amount of that individual payment.

In 2024, ISA regulations changed so you can contribute to more than one cash ISA in a year if you choose.
We only allow you to operate one ISA in any tax year, but if you choose to take another ISA with another provider, you will be responsible for making sure your total ISA contributions are within the ISA threshold.
The ISA allowance for the 2024/25 tax year is £20,000.

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