Savings and investment information is for educational purposes only. The value of investments can go down as well as up. Cash savings up to £85,000 per person per institution are protected by the FSCS.
Contents
Premium Bonds are the UK’s most popular savings product, but are they a smart financial choice? Here’s what you need to know.
If you want the wider route through cash savings, easy access accounts, Premium Bonds, NS&I, and emergency-fund storage, use the Savings Accounts hub.
What Are Premium Bonds?
The Basics
Feature
Details
Issuer
NS&I (backed by government)
How they work
Monthly prize draw instead of interest
Minimum holding
£25
Maximum holding
£50,000
Prizes
£25 to £1 million
Tax
All prizes tax-free
How It Works
Step
What Happens
Buy bonds
£25 minimum (then £1 units)
Wait
Bonds eligible after 1 full calendar month
Monthly draw
ERNIE picks winning bond numbers
Prize payment
Direct to bank or reinvested
Prize Structure
Prize Breakdown 2026
Prize
Odds (per £1 bond)
Approximate Prizes/Month
£1,000,000
1 in 59 billion
2
£100,000
1 in 14.8 billion
8
£50,000
1 in 7.4 billion
16
£25,000
1 in 3.7 billion
32
£10,000
1 in 3.7 billion
32
£5,000
1 in 1.8 billion
65
£1,000
1 in 675 million
1,750
£500
1 in 203 million
5,830
£100
1 in 6.1 million
193,700
£50
1 in 2.4 million
484,300
£25
1 in 21,000
~5.6 million
Overall Odds
Metric
Value
Odds per £1 bond/month
1 in 21,000
Prize fund rate
~4.5%
Median prize
£25
Expected Returns
What “Prize Fund Rate” Means
Concept
Explanation
Prize fund rate
Total prizes ÷ total bonds
Not your return
It’s an average across ALL bondholders
Reality
You could win more or less
Statistical Expected Returns
Holding
Expected Annual Prize Value*
£1,000
£45
£5,000
£225
£10,000
£450
£25,000
£1,125
£50,000
£2,250
*At 4.5% prize rate. Actual winnings vary enormously.
What You’re Likely to Win
Holding
Probability of £0 in a Year
Probability of Any Prize
£1,000
~40%
~60%
£5,000
~5%
~95%
£10,000
~0.3%
~99.7%
£50,000
~0.000001%
~100%
With small holdings, you may win nothing for extended periods.
Premium Bonds vs Savings Accounts
Rate Comparison
Product
Return Type
Effective Rate
Guarantee
Premium Bonds
Prize fund rate
~4.5%
None (variable)
Easy access savings
Fixed interest
4-5%
Guaranteed
Notice account
Fixed interest
4.5-5%
Guaranteed
Fixed rate bond
Fixed interest
4.5-5.5%
Guaranteed
Tax Considerations
Saver Type
Savings Account
Premium Bonds
Basic rate taxpayer
First £1,000 interest tax-free
All prizes tax-free
Higher rate taxpayer
First £500 interest tax-free
All prizes tax-free
Additional rate
No allowance
All prizes tax-free
When Premium Bonds Win
Situation
Premium Bonds Advantage
Higher/additional rate taxpayer
Tax-free prizes valuable
Already using PSA + ISA
Additional tax shelter
Like the “lottery” element
Psychological benefit
Risk-averse
Government-backed
When Savings Accounts Win
Situation
Savings Account Advantage
Basic rate taxpayer
PSA usually sufficient
Want certainty
Guaranteed returns
Smaller sums
Bad odds with small holdings
Need predictable income
Interest is reliable
Should You Buy Premium Bonds?
Good Fit If:
Criteria
Why
Higher/additional rate taxpayer
Tax-free matters
Already maxed ISA
£20k ISA first
Already using PSA
£1,000/500 allowance used
Like the excitement
Valid if you enjoy it
Want 100% security
Government guarantee
Holding £5,000+
Better odds
Not Ideal If:
Criteria
Why
Basic rate taxpayer
PSA usually covers you
Small amount to save
Poor odds
Need predictable returns
Too variable
Haven’t maxed ISA
ISA should be first
How to Buy and Manage
Buying Premium Bonds
Method
Details
Online
nsandi.com
Phone
08085 007 007
Post
Application form
Standing order
Regular purchases
Key Features
Feature
Details
Minimum purchase
£25
Purchase increments
£1 after first £25
Maximum holding
£50,000
Access
Withdrawal any time
Time to cash out
~3 working days
Prize Collection
Method
How It Works
Direct to bank
Automatic, same day
Reinvest
Buy more bonds
Warrant (cheque)
Outdated, avoid
Checking Prizes
Methods
How
Where
NS&I website/app
Check your holding
Prize checker
Online tool
Prize email
Sign up for alerts
Alexa
“Ask NS&I if I’ve won”
Unclaimed Prizes
Fact
Detail
Amount unclaimed
~£80 million+
Main cause
Lost track of bonds
How to check
NS&I prize checker with holder ID
Historical Prize Rates
Prize Rate History
Period
Prize Rate
2020
1.0%
2021
1.0%
2022
1.4%
2023
3.3%
2024
4.65%
2025
4.5%
Prize rate changes with Bank of England rate/NS&I competitiveness.
Strategies
Maximise Your Odds
Strategy
Impact
Hold near £50,000
Maximum odds
Hold minimum 3+ years
Luck evens out
Reinvest prizes
Compound effect
Check prizes regularly
Don’t lose out
Minimum Sensible Holding
Amount
Reasoning
£5,000+
Reasonable chance of regular wins
£10,000+
Luck evens out better
£1,000-4,999
Expect dry spells
Under £1,000
May win nothing for years
Key Takeaways
Not guaranteed returns — you might win nothing
Tax-free — valuable for higher earners
Max ISA first — Premium Bonds are second tier
Hold £5,000+ — for decent odds
100% safe — government guaranteed
Consider the fun — some enjoy the prize draw aspect