Start investing in the UK
A plain-English guide in six steps, from your first pound to owning a share of the world's best businesses. It's general education, not personal advice: if you're unsure what's right for you, a regulated financial adviser can help.
1Get the foundations in place first
Investing is for money you won't need for at least five years. Before you start:
- Build an emergency fund of about 3–6 months of essential spending in an easy-access savings account. It stops you being forced to sell investments at a bad time.
- Pay off expensive debt. Clearing a credit card charging 25% is a guaranteed 25% return. No investment reliably beats that.
- Take any free money from your employer. If your workplace pension matches extra contributions, that's an instant return before any growth.
2Choose the right account (the wrapper)
The account you invest through decides how much tax you pay. The investments inside can be the same. Figures are for the 2026/27 tax year.
| Account | Yearly limit | Tax | Good for |
|---|---|---|---|
| Stocks & Shares ISA | £20,000 across all your ISAs | No tax on gains or dividends, ever | Most people's first choice. You can take money out any time. |
| Lifetime ISA | £4,000 (counts towards the £20,000) | Government adds 25%: up to £1,000 a year | Ages 18–39 saving for a first home (up to £450,000) or for later life. Withdrawing for anything else costs a 25% charge. |
| Pension / SIPP | Up to £60,000 or your earnings, if lower | Tax relief going in; 25% tax-free coming out, the rest taxed as income | Long-term retirement saving. Locked until age 57 from 2028 (55 now). |
| General investment account | No limit | Gains over £3,000 a year taxed at 18% or 24%; dividends over £500 taxed at 10.75%, 35.75% or 39.35% | Money above your ISA allowance. |
From 6 April 2027, people under 65 can put at most £12,000 a year into a cash ISA; the full £20,000 can still go into stocks and shares. Tax rules can change at each Budget.
3Decide what to buy: funds, shares, or both
A global index fund buys a slice of thousands of companies at once for a fee of around 0.1–0.2% a year. You get the market's return with no stock picking, and most professional fund managers fail to beat it after fees over long periods. For most beginners it's the sensible core.
Individual shares let you own businesses you understand and believe in, but one company can fall a long way. If you pick shares, keep any single company to a modest share of your money and write down why you own it.
Fees compound against you. An extra 1% a year in fees on £10,000 growing at 7% costs about £6,600 over 20 years. Compare popular UK index funds and their fees →
4Invest regularly, and leave it alone
A monthly direct debit removes the hardest decision: when to buy. You buy more units when prices are low and fewer when they're high (pound-cost averaging), and you never have to guess the market.
Missing just a handful of the best days in the market can halve your long-term return, and the best days often come straight after the worst. See time in the market vs timing the market →
5Expect big falls. They're the price of the return
Stock markets have fallen 20% or more every few years, and occasionally 50%. Each time, it felt like it might never recover, and each time a diversified market eventually did. The people who did worst were those who sold near the bottom.
6If you choose individual companies, do the homework
Before buying a share, you should be able to answer:
- What does it do, and how does it make money? (two sentences)
- Is it a good business: growing, profitable, earning well on its capital, not drowning in debt?
- Is the price reasonable compared with its own history and its prospects?
- What would make you sell, and what will you do if it falls 30%?
Every company page on PlanMyWealth answers the first three with official figures and shows the working. Try one: this week's stock of the week, or ready-made lists of dividend growers and quality companies.
Six common mistakes
Short-term moves are mostly noise. Checking often makes people trade more and earn less.
Turning a temporary fall into a permanent loss is the most expensive mistake there is.
By the time something is in the headlines, much of the gain has usually happened.
Even great companies can fall 70%. Spread your risk.
A 1% difference in yearly costs can eat more than a quarter of your gains over 30 years.
Nobody can reliably time the market. Starting matters more than timing.
Track it all in one place
A free account gives you a watchlist, research on hundreds of companies, a practice portfolio to learn without risking money, and short lessons that build your confidence.
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