MaximISA Calculator

Most ISA providers only let you open one cash ISA each tax year, which can restrict your options. With our MaximISA, you can spread your annual £20,000 ISA allowance across our Cash ISA products in the best way to meet your needs. Our easy to use calculator shows you how.

Simply tell us how much you want to deposit for this tax year, plus how much you want to transfer from other ISA providers from previous tax years. Then split your deposits across our Cash ISA products by selecting them from the dropdowns below. You'll be able to see instantly how much interest you'll earn with Aldermore and the average interest rate you'll receive in the first 12 months. 

This calculator is designed for illustrative purposes only. Use of the calculator does not guarantee the opening of an account. The products and interest rates available can change at any time.                                                                                                  

Interest is calculated on the product Annual Rate as shown in the calculator. The calculations assume that no further deposits or withdrawals are made during the product term for the 1, 2 & 3 Year Fixed Rate Cash ISAs and in the first 12 months for the 30 Day Notice Cash ISA. For the 2 & 3 Year Fixed Rate Cash ISAs, the calculations also assume that interest is paid and compounded to the account once each year.

For the Help to Buy: ISA, you can select an initial investment of up to £1000, plus 12 regular monthly subscriptions from £1 to £200. The calculations assume that all deposits are made at the start of each month and that no withdrawals are made in the first 12 months. Where the Help to Buy: ISA is selected along with other accounts and regular monthly subscriptions are to be made, the initial average interest rate shown is calculated on the total  amount saved in each product in the first year, and does not take into account that the amount saved in the Help to Buy: ISA will not be the total amount initially but will increase as each monthly subscription is made.  

 Please make sure that your have read the product summary boxes and the Terms and Conditions before you proceed with opening an account. Once you’ve read all of the information and decided how you want to split your allowance, simply:

  - Follow the online account opening process for one of your chosen accounts. We’ll write to you, usually within five business days, to confirm that your first account is open and to give you your Customer ID

  - Log into your new account online and open your other chosen accounts by clicking on the ‘Open an account’ link and following the on-screen instructions. As an existing customer, we’ll already have your details so you can usually open other accounts in just a couple of minutes.