If you've got spare cash sitting in a savings account earning a modest return, National Savings and Investments has just made premium bonds a more tempting option. The government-backed savings provider has raised its prize fund rate for the second time in as many months, meaning 22 million bond holders now have genuinely better odds of winning something.
From September, the prize fund rate climbs to 4.35% annually, up from 3.8% in July. That might sound like a small shift, but it translates into roughly 308,000 additional prizes each month and a prize pot swelling by around £63m. More significantly, NS&I has reshuffled the prize structure to favour bigger wins. The number of £100,000 prizes is rising from 83 to an estimated 95, while £50,000 payouts will increase from 165 to 192. Meanwhile, the number of smaller £25 prizes is being trimmed.
For homeowners juggling savings alongside mortgage repayments, this change arrives at an interesting moment. With the Bank of England base rate holding at 3.75% and average five-year fixed mortgage rates sitting at 4.79%, the savings landscape feels increasingly squeezed. Easy-access savings accounts currently offer up to 5% interest, but that return is taxable for most people. Premium bonds offer something genuinely different: completely tax-free winnings.
Why tax-free matters more than you'd think
This tax advantage becomes substantial once you consider who holds these bonds. Higher-rate taxpayers already facing pressure on household finances benefit most obviously. But even basic-rate taxpayers who've exhausted their £1,000 personal savings allowance find premium bonds attractive. If you held the maximum £50,000 in bonds and won the full prize fund rate equivalent of 4.35%, that amounts to £2,175 entirely tax-free. Compare that to the same amount in a taxable savings account, where a basic-rate taxpayer would owe roughly £435 in tax.
For someone saving towards property improvements, an extension, or padding out a deposit for a future move, that tax efficiency adds real value over time.
The realistic odds and the inflation gamble
Let's be honest about the maths. Your odds of winning anything with each £1 bond number have improved to 21,000-1 from 22,000-1. Those are still long odds. Research from AJ Bell revealed that nearly two-thirds of premium bond holders have never won a prize, and that was before the latest changes. You could hold bonds for years and see nothing.
More concerning for property owners is what premium bonds don't offer: guaranteed returns. Unlike a savings account paying 5%, you get no interest at all. With inflation currently running at 2.9%, that means your bond holdings gradually lose purchasing power unless you win. That's particularly painful if you're saving for a specific property goal.
Savers who need certainty should stick with ordinary savings accounts. Those targeting specific timescales for house purchases shouldn't gamble on bond luck either.
Who should actually consider them?
Premium bonds make more sense for three types of people. First, higher-rate taxpayers who'd otherwise face substantial tax bills on savings interest. Second, those who've already maxed out their Isa allowance and are genuinely looking for tax-free alternatives. Third, people with surplus cash who can afford to tie it up without needing guaranteed access to interest.
Property owners in this third group often have equity they could release through remortgaging or home equity loans if they need funds urgently. For them, premium bonds can sit comfortably alongside a mortgage, providing a chance of meaningful winnings without the tax hit.
The improvement in higher-value prizes is worth noting too. With more £50,000 and £100,000 prizes in circulation each month, the potential reward for lucky winners has genuinely increased. If you're naturally optimistic about odds and can afford to hold the bonds long-term, that shift makes premium bonds worth a second look.
The practical takeaway
NS&I's decision to raise prize funds twice in two months suggests confidence in property and housing markets, even as UK house prices grow at just 2.0% annually. For homeowners with excess savings and a reasonable risk appetite, premium bonds now offer a more competitive proposition than they did six months ago.
But they shouldn't replace core savings or emergency funds. Build your savings buffer in an easy-access account first, use your Isa allowance, then consider premium bonds for additional surplus cash. The tax efficiency and improving odds make them worth a place in your overall savings strategy, even if winning the top prize remains firmly in the realm of fantasy.