What Should You Do With A £10,000 Windfall?

£10,000 could give a serious boost to your long-term financial health, if you use it well!

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

Do you ever watch those TV game shows where the winner takes away a cash prize and the host asks them what they’re going to spend it on? I’m waiting for someone to say “I’m going to beef up this year’s ISA with it, grabbing myself a few tasty looking blue-chip dividends“. But no, they’re always going to learn to play the tuba, or repaint the dog, or something.

I can understand how tempting it is. After all, a £10,000 windfall would buy you a very nice round-the-world holiday, or a decent car to replace your clapped-out old banger. Or 714 Wicked Variety Buckets from KFC (and please don’t ask me what they are — the name alone makes them sound too horrible to contemplate).

How much are you paying?

But wouldn’t it be great to hear “I’ll pay off my credit card bill with it“? Carrying credit card debt is one of the biggest financial mistakes you can make, and it’s where any spare cash should go before you think of anything else. Even a number of the established credit card companies are charging annual interest rates at around the 30% mark, and that adds an awful lot of cash onto the price of whatever it is you’re buying.

So before you think of spending a penny of any windfall on anything else, you owe it to yourself to get those credit card debts down — and you should really get rid of all debts other than your mortgage before you think about investing.

Next up should be some cash to cover emergencies, but how much? Conventional wisdom is that you should keep the equivalent of around three months’ expenditure in a quick access savings account, and that’s probably about right.

ISA time!

Once you’ve got your debts sorted and you’ve accumulated a sufficient rainy-day fund, you’re getting into serious investing territory. It’s then time to turn to an ISA — and I mean a shares ISA and not a cash ISA. An ISA currently allows you to invest up to £15,240 a year and have most of the returns protected from tax — so if you buy shares today and they’re much higher in value in 10 or 20 years time, or whenever you retire, you won’t pay a penny in tax on the gain.

Why shares and not cash? Well, for the past century and more, money invested in shares has beaten cash hands down. Today, you might get 2-3% interest per year from your bank if you’re lucky, but there are top FTSE 100 shares out there offering 5 to 6% and more in dividend income alone — we’re talking of companies like GlaxoSmithKline which paid 5.8% in 2015, Legal & General on a prospective yield of 5.4%, and SSE on a forecast 5.8%, and these aren’t high-risk outfits that are going to go bust tomorrow.

Shares will trash cash

The difference is a big one. If you could get 3% from cash savings, you’d turn your £10,000 into £18,000 in 20 years. But a dividend income of 5% per year would turn the same money into £26,500, and that’s before any share price gains. If you achieve a very modest 3% gain per year in share prices in addition, you’ll be sitting on £46,600 after two decades — and even an extra 1% above that would take you up to £56,000.

And £56,000 of future cash is a lot to sacrifice on a short-term treat (unless you’re already a successful investor and your future comfort is already secured, in which case go blow the cash and have fun!)

Alan Oscroft has no position in any shares mentioned. The Motley Fool UK has recommended GlaxoSmithKline. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Investing Articles

These British dividend stocks have been flying in 2026. I think there could be more to come!

If you think dividend stocks are boring, think again. Paul Summers looks at three FTSE 100 giants whose share prices…

Read more »

Investing Articles

Down 50%! 1 beaten-down FTSE 100 growth share to consider buying instead of Rolls-Royce

Harvey Jones highlights a growth share that has had a very bumpy five years but may finally be pointing in…

Read more »

Young Woman Drives Car With Dog in Back Seat
Investing Articles

How much is needed in an ISA to earn a £750 monthly passive income?

Christopher Ruane explains the timeline, approach and some risks of using the annual ISA contribution limit to build passive income…

Read more »

Investing Articles

Down 50% with a P/E of just 6.6! Should I buy even more of this stupidly cheap value stock?

Harvey Jones reckons this value stock has more recovery potential than any other blue-chip. So why isn't it flying with…

Read more »

Young female hand showing five fingers.
Investing Articles

Diageo: 5 reasons why a FTSE 100 turnaround is still possible

Diageo gave investors an all-too-familiar fright this week. So, why does this writer think things could improve in future for…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

With a P/E of 13 and 4.3% dividend yield, should I consider buying Greggs shares now?

Paul Summers takes a fresh look at the battered FTSE 250 baker. Is now the time to finally load up…

Read more »

Tesla building with tesla logo and two teslas in front
Investing Articles

After making a fortune on Tesla, Scottish Mortgage manager Baillie Gifford is piling into this ‘mini-SpaceX’ growth stock

Ben McPoland was intrigued to learn this well-known institutional investor has been loading up on a little-known growth stock recently.

Read more »

A handsome mature bald bearded black man in a sunglasses and a fashionable blue or teal costume with a tie is standing in front of a wall made of striped wooden timbers and fastening a suit button
Investing Articles

Here’s how I’m aiming for a million in my Stocks and Shares ISA

The best way to aim for a million in a Stocks and Shares ISA is by slow and steady progress…

Read more »