Investing is a route to make your money work for you, with a different level of risk to something like a savings account. In this section we focus on the basics and how to get started.
An investment is an asset acquired with the goal of generating income or an increase in value over time.
In summary
You invest money and, instead of getting savings interest, if the investment increases in value that generates the profitable return for you (to then withdraw later at the higher value).
The most important thing to remember is that the value of your investment can go up and down. That’s what makes investing higher risk than a simple savings account.
Picture it like this: an investment’s value wanders up and down along the way
Goes up…and downRecovers over time
Illustration only, not real data or a forecast.
Some investment examples
Shares in a specific company
Stocks, UK or overseas
Funds
Bonds
Gilts
Disclaimer: if you decide to invest, your capital (i.e. money) is at risk. The value of your investment can go down as well as up and you may get back less than you invest.
A Stocks & Shares ISA is a tax-efficient investment account, so you don’t pay tax on anything you earn through the ISA (individual savings account).
Much like a cash ISA, there are lots of providers who offer one, and they’re often called a platform. Instead of holding cash, you hold investments within the ISA, and you’re not taxed on the income or increase in value they generate.
The annual allowance
There’s an annual ISA allowance of £20,000 across all your ISAs (correct for the 2026/27 tax year, which runs from 6 April 2026 to 5 April 2027). It has been frozen at this level for several years, and the government has said it will stay at £20,000 until April 2031. From 6 April 2027 the most you can put into a cash ISA falls to £12,000 for under-65s, but the overall £20,000 allowance stays the same. Always check the latest figures on GOV.UK before making decisions.
Annual allowance£20,000
−
Already in a cash ISA£1,000
=
Left for Stocks & Shares£19,000
£1k
£19,000 still available this tax year
Cash ISAStocks & Shares ISA
Setting one up
You usually apply online with some basic details:
Your nameand date of birth
Your addresswhere you live now
Bank detailsto fund the account
NI numberyour National Insurance number
Watch out for high platform charges. If a platform charges you 2% per annum but you only earn 2% on the investment, you’re no better off!
Investment return2%
−
Platform charge2%
=
What you keep0%
You can invest outside of a Stocks & Shares ISA, much like you can open a savings account outside of a Cash ISA. An ISA is just the more tax-efficient and simpler way to get started. Outside an ISA, gains above your annual allowance may be subject to Capital Gains Tax, and a pension is another tax-efficient home for long-term investing (see Pensions and how pensions affect your tax).
Useful links: Like you compare car insurance providers, you can compare platforms on sites like MoneySuperMarket.
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Choose your investments
Now you know your risk level and you’ve set up the mechanism to invest, you can choose what to invest in! You can buy shares in a specific company, stocks (UK or overseas), funds, bonds or gilts. See the glossary for the definition of each.
Your two options
DIY
Do the homework and research yourself.
Adviser
Engage a financial adviser to do that bit for you. Even they can only recommend and can’t guarantee the return on your investment.
Avoid the scams: check any investment against the FCA warning list. Past performance is not a reliable indicator of future performance, so if an investment sounds too good to be true, it probably is!
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