Are Premium Bonds a sensible place for retirement savings?
Premium Bonds pay no interest. They enter a monthly prize draw whose advertised rate is an average across the whole fund, and the distribution is skewed by a small number of very large prizes — so the typical holder receives less than the headline rate, and a small holding frequently receives nothing at all.
- No interest: returns come from a prize draw, not from a rate paid on the balance.
- The advertised rate: an average across the fund, skewed upward by the large prizes.
- The security: 100% backed by HM Treasury, above the £85,000 FSCS limit.
- The limit: £50,000 per person, with a minimum holding to enter the draw.
01 How the return works
Each £1 bond is a separate entry in a monthly draw. The advertised prize fund rate describes the total prize pot as a percentage of the total amount invested across all holders — it is an average over the whole fund, not a rate paid to you.
Because the prize distribution includes a small number of very large prizes, the average is pulled well above the median. A holder with a small balance can go many months without a prize, and a run of nothing is the normal experience rather than bad luck.
The larger the holding, the more the actual return converges on the advertised rate, which is why the product suits someone at or near the £50,000 limit far better than someone with £2,000 in it.
Shows: the expected annual return on a holding at the advertised prize rate, against a taxed savings account. Ignores: the skew in the prize distribution, which means a typical holder receives less than the average.
On the defaults above, the worked example shows £1,080 a year. That beats £756 net from the savings account — but it is an average, and the median holder receives less.
Source: Premium Bonds
02 The genuine advantages
Prizes are free of Income Tax and Capital Gains Tax, so a higher-rate or additional-rate taxpayer with savings interest already exceeding the personal savings allowance keeps the whole return.
The security is absolute. NS&I is backed by HM Treasury rather than by the Financial Services Compensation Scheme, so the full £50,000 is protected rather than only the first £85,000 across a banking group. For someone holding large cash balances that is a real structural advantage.
And the money is accessible within days, with no notice period and no penalty. As a place to hold a cash reserve that must be safe and available, the product does its job.
03 Why they are not retirement savings
The expected return is close to a competitive savings rate before tax and below it for a basic-rate taxpayer whose interest fits inside the personal savings allowance. After inflation it is a small negative real return in most years, which is what cash does.
Retirement money that will not be spent for a decade should not be in cash of any kind. The comparison for Premium Bonds is against a savings account, not against a portfolio, and treating a large holding as a retirement plan converts a long horizon into a short one.
The reasonable use is the cash portion of a plan: an emergency reserve, or a drawdown buffer for someone who wants it outside a wrapper and above FSCS limits.
Source: Bank Rate and how it works
The advertised rate is an average across everyone, and averages are the wrong statistic for a lottery. A small holding will often return nothing for months, because the pot is skewed by prizes almost nobody wins. Where Premium Bonds genuinely earn their place is for a higher-rate taxpayer holding a large cash reserve: tax free, backed by the Treasury rather than capped at £85,000, and available in days. That is a good cash product. It is not a place to keep money you will not need for ten years, because none of it is invested in anything.
FAQ
Is the prize rate what I will earn?
No. It is the total prize pot as a percentage of the total invested across all holders, and the distribution is skewed upward by a small number of very large prizes. The typical holder receives less, and a small holding often receives nothing for months.
Are prizes taxed?
No. Prizes are free of Income Tax and Capital Gains Tax, which makes them relatively more attractive for a higher-rate taxpayer whose savings interest already exceeds the personal savings allowance.
Are Premium Bonds safe?
Yes. NS&I is backed by HM Treasury rather than by the FSCS deposit scheme, so the full holding is protected rather than only the first £85,000 — a genuine advantage for anyone holding large cash balances.
Sources
Regulator references
- Premium Bonds · NS&I · 2026The issuer's own terms: the prize fund rate, the holding limit and how prizes are drawn.Last verified: 2026-09-07
- Tax-free allowances on savings interest · GOV.UK · 2025The personal savings allowance and starting rate for savings.Last verified: 2026-09-07
- Bank Rate and how it works · Bank of England · 2025The policy rate that drives the mortgage and cash comparisons here.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
Run this rule against your situation
See what this rule does to your own projection — month by month, to age 90.
Join the Waitlist
Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.