Check Premium Bonds
Independent · private by default

Premium Bonds Prize Checker

If you have your Premium Bonds holder’s number, use it only with the NS&I Prize Checker for an account-level result. If you have individual bond numbers, you can download winning numbers data from NS&I, import it here and check those numbers locally in your browser.

Which number do you have?

I have a Holder’s Number

Use NS&I’s official Prize Checker to check your Premium Bonds account.

Check with NS&I ↗

Official NS&I service

This site has no Holder’s Number field. The number never enters this site.

I have individual Bond Numbers

Compare individual Bond numbers privately with an NS&I winning-number file.

Check Bond Numbers

Processed locally in your browser

The file and your numbers are checked on this device and are never uploaded.

Check Bond Numbers locally

Your bond numbers stay in this browser and are never uploaded to our server. Winning numbers data is downloaded from NS&I and imported by you.

How the local check works

  1. Get the winning-number file
  2. Drop the file here
  3. Enter your Bond Numbers
  4. Check

Open NS&I winning-number downloads ↗

Drop your NS&I winning-number file here

or

ZIP only, exactly as downloaded from NS&I. The file is read locally in this browser.

Preparing local import…

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No data imported yet. Drop a monthly winning-number ZIP above before entering bond numbers.