How to start investing in the UK: a beginner's guide (2026)
A step-by-step guide to start investing in the UK: what to sort out first, which account to use, what to invest in, how much you need and the mistakes to avoid. Written in plain English.
In this guideShowHide
I started investing in my early twenties at university, and I still put money away every month. The habit matters far more than the amount. Small, regular investments left alone for decades can grow into something life-changing.
This guide is general information, not personal advice. When you invest your capital is at risk and you may get back less than you put in.
What is investing?
Investing means buying assets, like shares in companies or funds that hold lots of companies, in the hope they grow in value or pay you an income over time. Unlike savings, the value goes up and down, sometimes a lot. In return, over long periods, shares have historically grown faster than cash.
Investing vs trading
Investing is buying and holding for years. Trading is buying and selling over days or minutes to profit from short-term moves. I do both, and trading took me many years to get consistent at. Most people who trade lose money. For almost everyone, investing is the better route to building wealth.
Before you invest: three checks
- Emergency fund: three to six months of essentials in an easy-access savings account. Then you are never forced to sell investments at a bad time. Our emergency fund calculator works out your number.
- Expensive debt: pay off credit cards and overdrafts first. Clearing a 25% interest card is a guaranteed return no investment can match.
- Time: only invest money you will not need for at least five years.
Step 1: choose your account
| Account | Tax treatment | Best for |
|---|---|---|
| Stocks and shares ISA | No income tax or capital gains tax on growth. Up to £20,000 a year across all your ISAs | Most people, most goals |
| Workplace pension | Tax relief plus your employer's contributions | Retirement. Make sure you get the full employer match |
| SIPP (personal pension) | Tax relief on contributions, locked until pension age | Extra retirement saving, the self-employed |
| Lifetime ISA | 25% government bonus on up to £4,000 a year. Ages 18 to 39 to open | A first home under £450,000, or retirement. A new First Time Buyer ISA replaces it for new savers from April 2029. Existing accounts carry on |
| General investment account | Taxable above allowances | After your ISA is full |
The October 2026 Budget scrapped the planned £12,000 cash ISA limit, so you can still split your £20,000 between cash and investments however you like. The ISA allowance checker shows how much you have left this tax year.
Step 2: choose a platform
Fees matter more than features. On a small pot, a platform with no account fee is usually cheapest. On a larger pot, a flat fee can beat a percentage. See our comparison of UK investing apps.
Step 3: choose what to invest in
| Option | What it is | Risk |
|---|---|---|
| Global index fund or ETF | Thousands of companies worldwide in one fund, at low cost | Medium to high, but spread out |
| Multi-asset fund | A ready-made mix of shares and bonds | Varies with the share of equities |
| Bonds | Loans to governments or companies that pay interest | Lower than shares |
| Individual shares | Owning part of one company | High: one company can fail |
| Crypto | Digital currencies | Very high and unregulated in many areas |
For most beginners, a low-cost global index fund, or a multi-asset fund matching how much risk you can take, is a sensible core. It gives instant diversification without having to pick winners.
Step 4: invest regularly
Set up a monthly payment the day after payday. Investing the same amount every month means you buy more when prices are low and less when they are high, and it takes emotion out of it.
Step 5: leave it alone
Markets fall sometimes, occasionally by a lot. Selling in a panic turns a temporary fall into a real loss. Check in once or twice a year, not every day.
How much do I need to start?
Very little. Many platforms accept regular investments from £1 to £25 a month. What matters is starting early and keeping going.
To see what regular investing can do over time, imagine £100 a month for 30 years with growth of 5% a year after fees: that grows to around £81,500, from £36,000 paid in. Real returns will be higher or lower, and are not guaranteed.
Common mistakes
- Waiting for the perfect time. Time in the market usually beats timing the market.
- Chasing tips and hot shares from social media.
- Paying too much in fees. A 1% difference a year can cost tens of thousands over a lifetime.
- Not using your ISA allowance, then paying tax you did not need to.
- Stopping during a fall, which is when regular investing does its best work.
When to get advice
If you have a large sum, a complicated tax position or a big decision like using a pension, a regulated financial adviser can help. You can check any adviser on the FCA register, and MoneyHelper has free, impartial guidance.
Common questions
Is investing better than saving?
For goals more than five years away, investing has historically beaten cash, though with ups and downs. For short-term goals and emergencies, cash savings are better.
Can I lose all my money?
With a single company or crypto, yes. With a diversified global fund it is very unlikely, but values can still fall significantly for a time.
How do I start investing with £100?
Open a stocks and shares ISA with a low-cost platform, put the £100 into a diversified global fund, and add to it monthly if you can.
This is general information, not personal tax or financial advice. Tax rules change and depend on your circumstances, so check GOV.UK or speak to an accountant before acting.