Premium Bonds Change of Address: How to Update with NS&I (2026)

To change your Premium Bonds address with NS&I, log in at nsandi.com, go to Your profile, select Your details, then select Change next to your address. If you are not registered for an online account, you can update your Premium Bonds address using an online form without creating an account. You can also call 08085 007 007 or post the change of details form available at nsandi.com. One NS&I number updates all your NS&I accounts simultaneously. You can also use Moveinout to notify NS&I alongside over 9,000 other providers in one process.

Why does updating your NS&I address matter when you move?

NS&I hold your registered address for all correspondence including prize notifications, account statements, maturity notices and any letters about your holdings. With over 24 million customers and a monthly prize draw, the address NS&I holds for you is the address any prize winner notifications, cheques or bank transfer confirmations are sent to.

An outdated address means important NS&I correspondence goes to your old property. If you win a prize and NS&I cannot reach you at your registered address, the prize is held until you are traced. For the monthly draws, NS&I contact prize winners by post. An incorrect address means you might not receive that notification.

There are also over 4.5 million unclaimed prizes held by NS&I at any given time, largely because holders have not kept their address up to date. Updating your address is the simplest way to ensure you receive any prizes you are owed and stay connected to your holdings. Keeping your NS&I address current alongside the rest of your moving day list is one of the most financially important updates you can make.

How do you change your NS&I address online if you have an account?

If you are registered for NS&I's online and phone service, updating your address takes around two minutes. The following steps are verified from nsandi.com/help/manage-your-details/change-personal-details.

How do you change your Premium Bonds address without an NS&I account?

NS&I confirm that Premium Bonds holders can change their address online without needing to create an account or send any paper. This is one of the most useful features for people who have held Premium Bonds for many years but have never registered for the online service.

Go to nsandi.com/help/manage-your-details/change-personal-details and use the Change of Premium Bonds details online form. You will need:

• Your Premium Bonds holder's number
• Your previous address
• Your new address

How do you change your NS&I address by phone?

NS&I's phone line is free to call from within the UK and is available seven days a week. If you are registered for the online and phone service, you can update your address by phone using your NS&I number and password.

• Call 08085 007 007, free from UK
• Open 8am to 8pm Monday to Friday
• Open 8am to 6pm Saturday and Sunday
• From outside the UK: +44 1772 329 880
• Textphone: dial 18001 then 08085 007 007

A virtual assistant is available 24/7 for general queries. For account-specific changes such as your address, you will need to speak with a member of the team during the hours above. Have your NS&I number and new address ready before you call.

How do you change your NS&I address by post?

If you prefer to update by post, download the change of details form from nsandi.com/downloads-and-forms. NS&I give the following guidance for completing the form:

• Write in BLACK CAPITAL letters inside the boxes, this helps NS&I process the form faster
• Include your NS&I number or account holder's number in section 1, one number is sufficient to update all your accounts
• Complete sections 1, 2 and 3 as appropriate, and sign in section 4
• If the bonds or account are held in more than one name, each holder must complete a separate form

NS&I do not publish a specific postal address on the change of details form, the address to use is printed on the form itself when you download it from nsandi.com.

Does one NS&I update cover all your NS&I accounts?

Yes. NS&I confirm that one NS&I number is sufficient to update all of your accounts. A single address change covers your Premium Bonds, Direct Saver, Direct ISA, British Savings Bonds, and any other NS&I products held in your name simultaneously.

On the paper change of details form, NS&I state explicitly: "If you have an account or holder's number, please write it here. We only need one number as we can use it to update all of your accounts." This means you do not need to complete separate updates for each NS&I product you hold.

How do you update a child's Premium Bonds address?

The process for updating a child's address depends on their age:

• Child under 16: The parent or guardian completes and signs the address update form or online process. Use the child's holder's number in section 1.
• Child over 16 who has taken control of the Bonds: The child should provide their own NS&I number if they have one, and the account number for the Bonds or account in section 1. They sign the form in section 4 themselves.

What if NS&I have recently asked for identity evidence?

If NS&I have recently asked you to provide evidence of your identity, for example as part of a security check or account verification process, you will not be able to update your details until that process has been completed. NS&I state this directly on their help page: "If we've asked for evidence of your identity recently, you won't be able to update your details until this has been processed."

If you try to update your address and find you cannot proceed, check whether you have any outstanding identity verification requests from NS&I. Once the identity evidence has been processed and NS&I have confirmed this, you will be able to complete your address update.

Notifying NS&I alongside all your other providers

Updating NS&I is one task on a long moving day list. Your council, HMRC, the DVLA, your bank, your energy supplier, your GP and dozens more all need your new address. None of them share information with each other or with NS&I.

Moveinout is a UK change of address notification service covering over 9,000 organisations across 24 provider categories. You enter your details once, select who needs to know, and Moveinout dispatches notifications to each provider on your behalf. A dashboard shows which providers have been notified so you can track progress throughout your move.

What happens if you do not update your NS&I address?

• Missed prize notifications: NS&I notify prize winners by post. If your address is out of date, prize notifications go to your old property. Prizes are held until you are traced, but you may not know you have won.
• Unclaimed prizes: NS&I hold over 4.5 million unclaimed prizes at any time. The most common reason prizes go unclaimed is an outdated address on the holder's record. Your prizes accumulate and can be reclaimed at any time, but only once NS&I can match you to your current address.
• Missed account correspondence: Maturity notices, account statements, interest rate changes and any security notifications from NS&I all go to your registered address.
• Identity and fraud risk: NS&I correspondence arriving at a former address containing your name, NS&I number and account details contributes to the previous occupier fraud risk that affects home movers.