No. And not as a pep talk — as arithmetic.
At 40 you have 27 years until the UK state pension age of 67. Invest £300 a month into a low-cost index fund over those years and, at the S&P 500's long-run average of about 10% a year, you end up with roughly £494,000. You'd have paid in £97,200. The rest is compounding, doing what it does when you give it a quarter of a century to work.
Averages aren't promises — at a more cautious 7% the same £300 a month still comes to about £287,000. Markets fall along the way, sometimes hard. But every 27-year stretch of the S&P 500 has contained crashes, and every one of them has ended a great deal higher than it started.
You don't need the years you've missed. You need the 27 you have left.
What can 27 years actually do?
At the same 10% average, from age 40 to 67:
You put in | Total paid | Roughly worth at 67 |
|---|---|---|
£300 a month | £97,200 | £494,000 |
£500 a month | £162,000 | £823,000 |
£10,000 lump sum | £10,000 | £131,000 |
£20,000 lump sum | £20,000 | £262,000 |
Notice what the lump sum rows say: money you already have — sitting in a Cash ISA, for instance — works even harder than the monthly amounts, because all of it gets the full 27 years.
“But I should have started at 25”
Yes, you should. Started at 25, that £300 a month would be heading past £2 million by 67. I'm not going to pretend otherwise, because you already know it, and the people who wave it away aren't being straight with you.
But that comparison is with a person who no longer exists. The only version of you that's real is the one deciding, today, between starting now and starting at 45 instead — and that five-year delay would cost you roughly £208,000 of the £494,000. The gap between 25-you and 40-you is gone. The gap between 40-you and 45-you is the one still open, and it's enormous.
Regret is the reason most people your age stay frozen. It's also the most expensive emotion in finance.
What should I actually do at 40?
Three things, in order.
First, find your workplace pension statement. You're almost certainly already an investor — your pension has been in the market for years without you watching it, which is worth a moment's thought next time investing feels too risky. Check what you're contributing and whether your employer will match more if you raise it. Matched contributions are free money and beat everything else on this page.
Second, open a stocks and shares ISA and set up a monthly direct debit — whatever's sustainable, even if it starts at £100. The habit matters more than the starting amount.
Third, put it in one low-cost index fund and leave it alone. No stock picking, no watching the news, no apps on your phone. Boring is what winning looks like over 27 years.
That's the entire plan. It takes an afternoon to set up, and the version of you at 67 is the only person whose opinion of it matters.
This is what I write about every week — managing your own money in plain English, without paying someone 1–2% a year to do it worse. The letter is free.
I am not a financial adviser. Nothing here is personal financial advice. This is my own experience and opinion, shared for information and education. The figures above are illustrations at assumed growth rates, not forecasts. Investing involves risk and you can lose money. Please do your own research before acting.