NS&I has issued an important reminder for Premium Bonds holders to review their accounts as the new year begins. The provider encourages customers to ensure their contact and bank details are up to date, and to check for any unclaimed prizes.
As of October 2025, there were 2.6 million unclaimed prizes worth nearly £110 million. An NS&I spokesperson said: 'The new year is a great time to do some financial housekeeping including checking that NS&I has up to date contact and bank details for you.'
Holders can check for prizes using the NS&I app or the prize checker tool on the NS&I website. The app allows users to view balances and prizes from the past six months, while the website's prize checker shows current and previous six months' prizes, as well as older unclaimed ones.
To use the prize checker, holders need their holder's number, which can be found on their Bond record or by logging into their account. The number is either 9 or 10 digits, or 8 digits followed by a letter.
NS&I also advises that customers can set up automatic reinvestment of prizes into new Bonds, which become eligible for the next month's draw. The prize fund rate has been cut several times in 2025, from 4% in January to 3.6% currently.
