How to check for Premium Bonds

Have you misplaced a savings product from NS&I? Here’s how to check for Premium Bonds and cash in any unclaimed prizes

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(Image credit: The Good Brigade)

National Savings and Investment’s Premium Bonds are one of the country’s most popular savings products, but how do you check for Premium Bonds that may have been forgotten about, and how do you go about retrieving any unclaimed prizes

How to check for Premium Bonds

Premium Bonds will always be valid until they are cashed in, so even if you think you may have some from decades ago, it is well worth trying to track them down.

Visit and look for the ‘Form to track down lost savings’. You can complete this form online or download and print a copy to complete by hand.

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If doing the latter, send your completed form to: Tracing service, NS&I, Sunderland SR43 2SB

You can also use This is a free service from UK Finance and the Building Societies Association that helps you track down lost accounts or savings. It’s not only for NS&I products, so it may be worth a visit if you have other lost accounts.

If you’re trying to track down Premium Bonds on behalf of someone else, then make sure you are legally entitled to act on their behalf, for example under a Power of Attorney or as an Executor. NS&I say to call them for advice on how to trace someone else’s accounts or investments. 

If you need more help or guidance, NS&I has a helpful list of contacts who may be able to steer you in the right direction.

How to check for Premium Bond prizes

There are a number of ways to check for prizes - both ones you know about and those you don’t.

NS&I website or app

The easiest way is through the prize checker or the official prize checker app, available on either Android or iOS. Both of these methods will show you the prizes on offer that month, any winnings you may have had over the past six draws as well as any unclaimed prizes.

You will need your Premium Bonds holder’s number to use the website and your NS&I number or holder’s number to check via the prize checker app - it has either 9 or 10 digits, or 8 digits followed by a letter.

If you don’t have your Premium Bonds number to hand, do not worry. Through the app you can use your NS&I number - it is 11 digits long and starts with an 11, 21, 31 or 41.

Use your Alexa

You can also use your Alexa-enabled device to check if you’ve won, so long as you have a supported device and have successfully set it up. Once given the command, Alexa will be able to tell you whether you have won a prize and how much it's worth, as well as details for any upcoming draws.

It can also tell you if you have any prizes yet to be redeemed - there is currently a £25 prize from July 1968 which remains unclaimed. Maybe it is yours!

To get it set up, you’ll need to activate the NS&I Premium Bonds prize checker skill on your Alexa app and enter your NS&I number. After that, you will be able to use your smart speaker to stay updated on all things Premium Bonds.

How to check for unclaimed prizes

It’s well worth checking to see if you have any unclaimed prizes, particularly if you haven’t been keeping on top of prize draws recently. 

According to the latest data from NS&I, there are more than two million unclaimed Premium Bonds worth £82,521,050 as of April 2024.

Beyond using the website, app or Alexa to check for prizes, NS&I have a few ways of finding out whether you have any cash waiting to be claimed.

If you’re registered for online or phone services, you can call NS&I for free on 08085 007 007.

If you aren’t registered, you can write to NS&I and ask if you have any unclaimed prizes. To help them track any potential prizes down for you, your letter must include:

  • Premium Bonds holder's number
  • Your current name
  • Any previous names
  • Your current address
  • Any previous addresses where Bonds may have been registered
  • Your signature

Send your letter to: NS&I, Sunderland SR43 2SB.

Any prizes will then be sent to your home address - they cannot be sent directly to your bank account.

Tom Higgins

Tom is a journalist and writer with an interest in sustainability, economic policy and pensions, looking into how personal finances can be used to make a positive impact. He graduated from Goldsmiths, University of London, with a BA in journalism before moving to a financial content agency. 

His work has appeared in titles Investment Week and Money Marketing, as well as social media copy for Reuters and Bloomberg in addition to corporate content for financial giants including Mercer, State Street Global Advisors and the PLSA. He has also written for the  Financial Times Group.

When not working out of the Future’s Cardiff office, Tom can be found exploring the hills and coasts of South Wales but is sometimes east of the border supporting Bristol Rovers.