An old address, missing holder’s number or expired cheque can leave a prize unpaid, even when you have won. Premium Bonds offer tax-free prizes rather than guaranteed interest, so the prize fund rate is not a personal return when comparing them with a Cash ISA.
New bonds wait one full month before a draw
Bonds bought in one calendar month normally enter their first draw in the month after the next: bonds bought in January are usually eligible for the March draw because they must be held for a full calendar month.
A purchase made on 1 January and one made on 31 January usually follow the same pattern: both need February as their full holding month, then join the March draw.
The monthly timeline in plain English
The cycle is purchase, a full calendar-month wait, draw eligibility, results at the start of the following month and payment; bank payments are normally made within the first seven working days, although failed transfers need separate action.
The largest prizes are only part of the draw
ERNIE selects eligible bond numbers monthly, with prizes ranging from £25 upwards and the number in each band changing when NS&I updates its prize structure.
The prize fund rate is not personal interest
The prize fund rate estimates the value of all prizes paid across eligible Premium Bonds over a year; it is not a promised rate on your money. A person may win several prizes or hold Premium Bonds for years without winning, so check current odds and rates on the NS&I website before buying.
A £50,000 holding gives 50,000 entries in every eligible draw, but it does not guarantee monthly or annual income because the published rate is an average across the prize pool.
Cash ISA versus premium bonds
Both products can provide tax-free returns, but a Cash ISA usually offers a stated rate that is easier to plan around for a fixed goal, while Premium Bonds offer uncertain prizes.
| Decision point | Premium Bonds | Cash ISA |
|---|
| Return | Random tax-free prizes | Stated tax-free interest rate |
| Known income | No, even with £50,000 held | Yes, subject to account terms |
| Maximum subscription | £50,000 total holding | Uses annual ISA allowance |
| Capital backing | Backed by HM Treasury | FSCS rules apply to eligible deposits |
From buying a bond to receiving a prize
1. Buy
£25 to £50,000 total
2. Wait
One full calendar month
3. Draw
ERNIE selects bond numbers
4. Receive
Bank, reinvestment or cheque
Each eligible £1 Premium Bond is a separate entry in the monthly ERNIE prize draw, so a £25 holding has 25 chances in a draw and a £50,000 holding has 50,000. The published winning odds for Premium Bonds describe the chance of one £1 bond winning any prize in one monthly draw; they can change when NS&I changes the prize structure. NS&I sets the total monthly prize fund from the prize fund rate, then allocates that fund across prize bands, from the £25 prizes to the highest prizes.
That is why the prize fund rate is an average across all eligible Premium Bonds, not the return any individual saver should expect. Premium Bond eligibility also depends on the bond having completed its full calendar-month holding period.
Check and claim prizes with the right record
The official prize checker needs a holder’s number or NS&I number, not just a name; check online, in the app, through an online account, with Alexa or by post if digital access is impractical.
Choose the route that matches your details
| Checking route | Details normally needed | Best for |
|---|
| NS&I prize checker | Holder’s or NS&I number | Recent and unclaimed prizes |
| NS&I online account | NS&I number and login | Prize history and payment instructions |
| Premium Bonds app or Alexa | Holder’s or NS&I number | Quick result checks |
| Post to NS&I | Identity and known holding details | Old, lost or complex records |
Old bonds and missing numbers need proof
For historic or inherited holdings, contact NS&I with known names, former addresses and approximate purchase dates; it may require ID, name-change evidence or probate documents. Check prize history before requesting payment, as prizes may have been reinvested, sent to a closed account or issued by cheque.
This guide does not replace a return comparison for new savings. If you need predictable interest, planned access to cash, or are choosing between a Cash ISA and Premium Bonds for a fixed goal, compare the available ISA rate, your ISA allowance, the time until you need the money, and your ability to accept no prize at all.
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A simple paper record can help when you are tracing old bond details or checking whether payment instructions changed. It is most useful for noting holder numbers, old addresses and the date you contacted NS&I.
- Keeps a holder’s number separate from individual bond numbers
- Records old addresses that may help NS&I trace historic holdings
- Creates a dated record of prize checks and payment updates
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If a Premium Bond prize payment has not arrived, start by checking the prize history and the payment instruction recorded in your NS&I account. For a missing Premium Bond prize payment by bank transfer, confirm that the account is still open and that its sort code and account number are correct; a rejected payment can require NS&I to update the instruction before it is sent again. If a Premium Bond cheque is delayed, allow for post and check whether it was sent to an old address.
Do not try to cash an expired cheque: contact NS&I to ask how it can be cancelled and reissued after your identity and current address have been confirmed. An unclaimed Premium Bond prize does not disappear simply because it is old, but NS&I must first match it to the correct holding.
Premium Bonds bought in 1959, 1970 or more than 50 years ago can still be traced even if the original paperwork and holder’s number have been lost. Give NS&I every detail available: the holder’s full name at the time, any former names, each old address, approximate purchase year and value, and whether the bonds may have been bought for a child. A marriage certificate, deed poll or other name-change evidence may help link records held under an earlier name.
For a deceased holder, the executor or personal representative should be prepared to provide probate or other estate documents. NS&I cannot perform a public name-only prize search, but this information can help it investigate historic records and any unclaimed Premium Bond prizes.
Questions & answers
Can I check Premium Bonds by name?
No, NS&I does not offer a public name-only search. Use a holder’s or NS&I number, or contact NS&I with evidence for an old or lost record.
How long before new Premium Bonds enter a draw?
New Premium Bonds need one full calendar month before becoming eligible. Bonds bought in January normally first enter the March draw.
What should I do if my prize payment is missing?
Check prize history, your registered bank account and payment choice. NS&I can investigate failed transfers, uncashed cheques or outdated details.
Can I claim unclaimed prizes from old bonds?
Yes, old bonds can still have unclaimed prizes. NS&I needs enough information to locate the record and may request ID or probate evidence.
Are Premium Bonds prizes taxed in the UK?
No, prizes are tax-free for UK tax purposes. They are prizes, not savings interest, so the prize fund rate is not guaranteed.
What happens when reinvestment reaches £50,000?
Automatic reinvestment stops if it would take holdings above £50,000. NS&I then uses the alternative payment instruction on the record.
Keep your prize record ready
Review your address, bank details and prize option at least yearly and after a move, name change or bereavement. Premium Bonds can suit savers who accept uncertain returns, but compare a Cash ISA rate when money has a fixed purpose in the next two to five years.
Further reading
If you want to learn more about this topic, these sources may interest you:
