Promise Saver

An account for whatever you’re promising to save for. The Promise Saver gives you an annual or monthly rate for your savings as well as promising you an annual fixed bonus if you don’t make more than two withdrawals a year.

Without conditional bonus

  Balance Gross* p.a. AER†
Annual interest £500 - £2,000,000 0.40% 0.40%
Monthly interest £500 - £2,000,000 0.40% 0.40%

With conditional bonus

  Balance Gross* p.a. AER†
Annual interest £500 - £2,000,000 0.90% 0.90%
Monthly interest £500 - £2,000,000 0.90% 0.90%
  • Open in branch
  • Save from £500 to £2 million
  • Interest is calculated on your daily balance and paid annually or monthly
  • Enjoy a bonus every year if you don't make more than 2 withdrawals per calendar year
  • Withdraw your money at 30 days notice or immediately with a loss of 30 days gross* interest
  • Closure permitted (and counted as a withdrawal)
Summary box
  Summary Box
Account name Promise Saver Issue 10
What is the interest rate?
Gross* p.a.
Variable interest rate without bonus
Variable interest rate with bonus

Interest is calculated on your daily balance and paid annually on 1 January every year or monthly on the first business day of each calendar month, depending on what you choose. The bonus is paid annually on the 1 January.
Can Principality change the interest rate? Yes, variable account rates could increase or decrease.

Customers will be given personal notification of any material reduction in interest rates a minimum of 14 days before the change takes effect.

To understand why rates may be reduced please refer to page 14 and 15 of the Savings Terms and Conditions.
What would the estimated balance be after 12 months based on a £1,000 deposit? Based on the assumption that no further deposits or withdrawals are made during the 12 months.
Without bonus
With bonus
How do I open and manage my account?
  • You must be aged 16 or over and a UK resident for tax purposes to open and operate this account.
  • Open your account in branch or agency.
  • Minimum balance is £500, maximum balance is £2,000,000. You need to keep the minimum balance in your account for it to remain open.
  • Manage your account in branch, agency, post or online via secure message (subject to Your Account eligibility criteria, available when you click “Register Now” at
Can I withdraw money?
  • Yes, all withdrawals from your account are subject to 30 days’ prior notice or loss of 30 days’ Gross* interest on the amount you withdraw, if you do not give 30 days' prior notice.
  • Closure permitted and this counts as a withdrawal.
  • The account offers a fixed bonus of 0.50% Gross* as long as you don't make more than two withdrawals per calendar year.
Additional information
  • Service charges and costs may apply to your account. These are outlined in our Tariff of Charges.
  • If the total amount of interest you earn exceeds your Personal Savings Allowance then you may have to pay tax directly to HMRC. For more information visit and search ‘Personal Savings Allowance’.
  • In certain circumstances we may refuse an instruction to operate an account. These circumstances are outlined on page 6 of the Savings Terms and Conditions.
  • Rates correct as at 07/08/17.
Calculate your savings

Savings calculator

Please enter amount

Amount must be less than 2000000

Please enter amount

Amount must be less than 2000000

Please choose a duration

Please choose a duration


  1. The results displayed were dependent on the information you provided and are for illustrative purposes only and are by no means an indication of being suitable for your individual circumstances.
  2. The calculations assume interest is paid gross* of income tax on the entire balance on an annual basis
  3. It has been assumed that no withdrawals or additional deposits would be made from the account during the saving duration, and that the interest rate also remains the same during this time (note that interest rates on variable rate savings account are subject to change, and when fixed rate deals end, there is no guarantee that the same rate will be available in the future). 

Before you apply below, please read the Promise Saver Issue 10 Terms & Conditions

As you will be bound by the Account Terms of the account, you must read them. If you do not understand any of the terms and conditions please contact us for further information.

We recommend that you print and keep a copy of these terms and conditions for your records.
Please also read the following:

* Gross is the contractual rate of interest payable before the deduction of income tax at the rate specified by law.

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

Product previously viewed

Promise Saver Issue 10

  • 6th largest UK building society
  • A mutual building society, owned by and run for the benefit of our 500,000 members
  • Over 150 years experience
  • Taking care of over £9 billion of our customers' assets
  • Members can access a Member Rewards page featuring competitions, discounts and more.

We are covered by the FSCS

Find out more about what it means for you.