Jasmine Birtles
Your money-making expert. Financial journalist, TV and radio personality.
Can You Lose All Your Money Investing? What the Real Risks Are
Moneymagpie Team
2nd Nov 2026
It is the question almost every beginner quietly asks before putting in their first £50, what if it all just disappears? The honest answer is that yes, it is possible to lose everything you put into a single investment, but it is very unlikely if you invest in a broad, diversified way.
Let’s unpack what that actually means, where the real dangers lie, and how to protect yourself.
Investing always carries risk, and the value of your investments can go down as well as up. You could get back less than you put in. But “some risk” and “losing everything” are very different things. Which one applies depends on what you invest in and how you invest.
The Financial Conduct Authority (FCA), the UK regulator, puts it simply in its golden rules of investing: the greater the potential returns, the higher the level of risk. And with high-risk investments, you should be prepared to lose all of your money.
When you can lose all your money
1. Putting everything into one company
A single company can go bust. When that happens, shareholders are paid last, so the shares often end up worthless. UK construction giant Carillion collapsed in 2018, and shareholders were left with almost nothing. Plenty of famous companies have fallen from grace, which is why putting all your money in one share is a risky game, however confident you feel.
2. High-risk investments
The FCA says high-risk investments include things like cryptoassets, mini-bonds, land banking and contracts for difference (CFDs). Its guidance on high-risk investments warns you could lose all the money you invested, and with some products you could even end up owing more. It suggests keeping them to a small share of your total net assets, about 10% at most, and only investing money you can afford to lose entirely.
3. Scams
If an “investment” promises guaranteed returns, pressure to act fast, or tips from a stranger on social media, treat it as a red flag. The FCA is clear that if it sounds too good to be true, it could be a scam. Money lost to a scam is rarely recoverable, which is a different risk from normal market ups and downs.
4. Borrowing to invest
Using borrowed money, or “leveraged” products, magnifies losses as well as gains. This is how some people lose more than they started with. As a beginner, it is best avoided.
Can you lose everything in a diversified fund?
For a fund that holds hundreds or thousands of companies, such as a global index fund, losing 100% would mean practically every company in it going to zero at the same time. That is extremely unlikely. But “unlikely to hit zero” doesn’t mean “safe from big drops”. Funds can and do fall sharply during market downturns, and recovery can take years.
A simple example shows why losses hurt more than they look. If your £1,000 falls 20%, you are left with £800. To get back to £1,000, that £800 needs to grow by 25%, not 20%. (This is an illustration only, not a forecast.)
Our guide to how to invest in index funds explains how these funds spread your risk.
Paper losses vs real losses
When markets dip and your balance falls, that is a “paper loss”. It only becomes a real loss if you sell at the lower price. Time in the market is why the FCA suggests thinking about a period of at least five years, so you have room to ride out short-term dips, and why trying to time the market increases your risk of buying or selling at the wrong time. Remember: if you need the money within a few years, it probably shouldn’t be in the stock market at all.
What if your investment platform goes bust?
This is different from your investments falling in value. Regulated UK platforms must keep your money and investments separate from their own. If an FCA-authorised firm fails and your assets go missing, the Financial Services Compensation Scheme (FSCS) may step in, with a limit of £85,000 per eligible person, per firm at the time of writing.
Crucially, the FSCS says it cannot cover investment losses from market falls or poor performance, because investment values can go down as well as up. See the FSCS investment protection page for current rules.
How to reduce your risk of big losses
- Diversify. Spread your money across many companies, sectors and countries. Funds make this easy.
- Invest regularly. Putting in a set amount each month smooths out the ups and downs.
- Keep a long-term view. Aim for at least five years, and keep emergency savings in cash.
- Only invest what you can afford to leave alone. If you would panic at a 20% fall, invest less or choose lower-risk options.
- Be sceptical. Check that firms are FCA-authorised and ignore promises of guaranteed returns.
What to do next
- Build a safety net first. Make sure you have emergency cash set aside before investing. Our 5-minute investing starter checklist is a handy place to start.
- Decide how much you can invest. You don’t need much. See how much money you need to start investing in the UK.
- Start with a diversified fund rather than a single risky share.
- Learn the basics at your own pace. Our guide to stock investing for complete beginners walks you through it.
- Start small, be patient. Confidence comes with time.
Disclaimer: This article is for informational and educational purposes only and is not regulated financial advice. Investing involves risk, and the value of your investments can go down as well as up, so you could get back less than you put in, or lose all of it. Examples and calculations are illustrations, not forecasts. Rules such as FSCS limits can change, so check official sources. Do your own research or speak to a regulated financial adviser before investing.
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