Before you start
Investing works best once the first three steps of the route are in place:
- you have a budget that leaves money over each month
- you've cleared expensive debt and built a safety net
- you're getting your employer's full pension contribution.
Not sure where you stand? Find your starting point in under a minute.
What is investing?
When you invest, you buy something you expect to grow in value or pay you an income over time. The main types are:
- Shares: a small part of a company. If the company does well, its shares may rise in value, and some companies pay part of their profits to shareholders as dividends.
- Bonds: loans to governments or companies, which pay you interest.
- Funds: a pool of money from many investors, used to buy lots of shares or bonds at once. Funds are the simplest way for most beginners to spread their money widely.
Why time matters
When your investments grow, that growth can grow too. This is called compounding, and the longer you leave your money, the more powerful it becomes. Try different amounts and timeframes in our compound interest calculator.
Understanding risk
The value of investments goes down as well as up, and you could get back less than you put in. Prices can fall sharply over months or even years. That's why investing is best suited to money you won't need for at least five years, and why your safety net should stay in cash.
Spreading your money across many companies, industries and countries reduces the damage any single one can do. This is called diversification.
Where to invest
The type of account you use affects how your investments are taxed:
- Stocks and shares ISA: you don't pay tax on any growth or income. You can pay in up to £20,000 a year across all your ISAs in 2026/27.
- Pension: you get tax relief on what you pay in, but you usually can't take the money until age 55, rising to 57 from April 2028.
- Lifetime ISA: if you're 18 to 39, you can pay in up to £4,000 a year and the government adds a 25% bonus, up to £1,000 a year. It's designed for buying your first home or for later life, and there's a charge if you withdraw for other reasons. Check the latest rules on GOV.UK.
- General investment account: no tax benefits. Dividends above £500 a year and gains above £3,000 a year may be taxed.
Choosing what to invest in
Many beginners start with funds that spread their money widely, such as index funds. Whatever you consider, look at three things: how much it costs, how widely it spreads your money and how much risk you're comfortable with.
Choosing where to invest
You'll need an account with an investment platform or provider. When comparing them, look at:
- fees: platform fees, fund charges and any dealing fees all add up
- investment choice: whether it offers the kinds of investments you want
- regulation: check the firm is authorised on the FCA Register.
Pay yourself first
Set up a regular monthly payment that goes out on payday, before you have a chance to spend it. Investing a fixed amount each month also means you automatically buy more when prices are low and less when they're high.
Common mistakes to avoid
- Checking too often: daily ups and downs can tempt you into rash decisions.
- Selling when prices fall: this turns a temporary fall into a permanent loss.
- Following hype: tips on social media are no substitute for a long-term plan.
- Falling for scams: if an offer promises high returns with little risk, be very cautious. Check it on the FCA's ScamSmart website first.
Common questions
How much money do I need to start investing?
Not much. Many platforms let you start with small monthly amounts. Starting early with a small amount can matter more than waiting until you have a large sum.
Is investing the same as gambling?
No. Gambling is a bet on a single outcome. Long-term investing in a wide spread of companies is a share in their growth over time. There's still risk, but it's a very different kind of risk.
Should I invest a lump sum or a monthly amount?
Both are common. Investing monthly fits naturally with paying yourself first and smooths out the ups and downs. A lump sum has longer to grow but is more exposed to a fall soon after you invest.
Sources
We checked this guide against these sources on 8 October 2026. Rules and allowances can change, so always check the latest position on GOV.UK.
- GOV.UK: Individual Savings Accounts
- GOV.UK: Lifetime ISA
- GOV.UK: Tax on dividends
- GOV.UK: Capital Gains Tax allowances
- GOV.UK: Increasing the normal minimum pension age
- FCA Register
- FCA ScamSmart
This guide is general information, not personal financial advice. Read our full disclaimer.