Ten thousand pounds sitting in a current account earning nothing is a decision in itself. Move it somewhere for twelve months and you have two obvious candidates: Premium Bonds, or a one-year fixed-rate savings bond. Both protect your capital. Neither is automatically the better home for the money.
The right answer comes down to three things you already know about yourself: how much tax you pay on savings interest, whether you can genuinely leave the cash alone for a year, and how you feel about a guaranteed £440 versus a possible £25,000.
Premium Bonds are not a savings account. There is no interest rate attached to your holding. Instead, your £10,000 buys 10,000 £1 bonds, and each bond gets one entry into a monthly prize draw. Prizes run from £25 up to £1m, and every penny is tax-free.
Your capital is safe. NS&I is backed by HM Treasury, so the £10,000 cannot be lost, and you can cash bonds in whenever you like. What is not guaranteed is the return.
A one-year fixed-rate bond works the opposite way. You agree to leave the money with a bank or building society for twelve months, and in return you get a set rate of interest. The rate is contractual. That protection extends to the provider itself, up to £85,000 per person per institution under the Financial Services Compensation Scheme.
NS&I sets a prize fund rate, and it moves. That figure is the average payout across every eligible bond in the country. It is not the rate you personally receive.
Your £10,000 generates 120,000 bond entries over a year. At the odds that have applied in recent years — roughly one prize per 21,000 bond entries per draw — that works out at five or six prizes a year. The overwhelming majority of prizes are £25. A £50 or £100 turns up now and then. Anything larger is a genuine stroke of luck.
So a very ordinary year looks like this: five or six prizes, mostly £25, adding up to £125 or £150 on £10,000. That is a return of around 1.3%. The average across all Premium Bond holders is higher — closer to the headline prize fund rate — because a small number of people win £1,000, £10,000 or the £1m jackpot, and those wins pull the average up. The typical holder does not get the average. That skew is what catches people out.
With Premium Bonds you are buying the chance of an average return, not a promise of one.
One-year fixed rates move constantly, so check current deals rather than relying on last year's figure. Say you find 4.4%: £10,000 earns £440, guaranteed, in twelve months' time.
Now add tax. Premium Bond prizes are free of income tax and never need to be declared. Savings interest is not, though most people have a Personal Savings Allowance to use first: £1,000 for basic-rate taxpayers, £500 for higher-rate, nothing for additional-rate.
If you are a higher-rate taxpayer and that allowance is already used up by other savings, £440 of interest becomes £264 after 40% tax. A basic-rate taxpayer in the same position pays 20% and keeps £352. An additional-rate taxpayer pays 45% and keeps £242. Compare that with Premium Bonds, where the entire prize pot — whatever you win — stays with you.
Even if your allowance covers the interest, the gap narrows but does not vanish. A basic-rate taxpayer with £1,000 of unused allowance pays no tax on the £440, so the fixed bond pays £440. The Premium Bond holder with an average year gets £125 to £150. The fixed bond still wins on certainty, but the Premium Bond holder had a shot at much more.
Fixed-rate bonds lock your money away. If an emergency forces you to withdraw early, you will usually pay a penalty — often 90 or 180 days' interest — which can wipe out a chunk of the return. Some providers allow access but reduce the rate. Either way, the money is not truly available.
Premium Bonds are different. You can cash them in at any time, and the money typically arrives within a few working days. There is no penalty and no notice period. For an emergency fund, that flexibility is worth something. But if you are confident the £10,000 will not be needed for twelve months, the fixed bond's higher guaranteed return becomes more attractive.
Over a single year, the difference between the two options is likely to be modest — a few hundred pounds at most. The bigger risk is leaving the money in a current account doing nothing at all. Pick the one that matches your tax situation, your need for access, and your tolerance for uncertainty. Then leave it alone for twelve months and let the clock do the rest.
