It’s preferable to start investing at a young age: the younger, the better. If you are fortunate, your parents or legal guardians might have decided to start investing on your behalf when you were a child. It’s a great way to start investing without even knowing it.
If you’re lucky enough to have parents who set up an investment portfolio for you when you were young, the best “beginner’s guide” they could give you is to involve you in it – showing you how the account is doing over time and sparking your interest in how investing works.
If you weren’t one of the lucky ones, it’s never too early to get started. From the age of 18 you can invest on your own. Investing as a beginner in the UK can feel daunting at first – there’s risk to think about, and working out how and where to start can seem complicated.
Why investing early matters
The main advantage younger investors hold is time. The longer your money is invested, the more chance markets have to recover from dips and benefit from periods of growth. Even modest monthly contributions can grow substantially over 20 or 30 years. A longer time frame means you can sit through market ups and downs and potentially benefit from compounding, where growth builds on top of previous growth. Even if you’re only able to invest a relatively small amount each month, decades of compounding can turn it into something much larger.
Compounding means you earn returns not just on the money you put in, but also on the returns you’ve already made. For example, say you invest £200 per month over 30 years and achieve a hypothetical 5% annual return. Your £72,000 in contributions could grow to more than £160,000. This is just an illustration, not a guarantee, but it highlights the power of staying invested over time.
Before investing: build up your financial foundations
If you’re in your 20s or 30s, you’re probably balancing a lot: rent or a mortgage, a still-growing salary, travel plans, maybe starting a family, plus the odd emergency. A good way to approach investing is to get your foundations in place:
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Put together a cash buffer of 3–6 months’ essential costs in an easy access account✓
Pay off expensive debts like credit cards before you invest✓
Start small and regularly, rather than waiting until you’ve saved a big lump sum
Laying this groundwork helps you focus on long-term investing without worrying about day-to-day stability.
Understanding compound interest
The first thing to get your head around is what is compound interest and the power it holds. What do we mean by that? We are talking about compound interest. It is the type of interest that earns interest on itself.
The interest made in one year is added to the initial investment, and after that, it gets added to the ongoing annual total on which it makes more interest. You can try our compound interest calculator to see how this works in practice.
As far as long-term investment options go, compound interest gives substantial growth. Opening an account that offers this type of interest is one of the top financial planning tips for young adults.
Another top tip for beginner investors is to focus on long-term investments. We’ve already linked them to compound interest, but the benefits aren’t just about growth – investing for the long term can also help manage risk.
It’s all about the relationship between volatility and time. The longer your money is invested, the more likely your investment can weather any downward market trends. Over extended periods, long-term investing tends to smooth out some of the bumps, making it generally less risky than trying to invest over very short timeframes.
How to start financial planning
Investing can be a great step for beginners, but it’s not something you should rush into. A better approach is to take the time to understand your own finances and learn the basics of financial planning before you start.
People want to invest in the hope of achieving financial security, and personal financial planning for young adults is the key aim.
To get off on the right foot, young wannabe investors need to identify their short, medium, and long-term financial goals. If you fail to set these targets, you are likely to spend more than you should, which could mean you will come up short when money is needed.
Financial planning matters for students too, even though no one can fully predict what might affect their finances, as the COVID-19 pandemic showed. Thinking ahead at least encourages you to consider different possibilities and prepare as best you can. And this isn’t just for people thinking about investing for the first time; it’s something every investor should keep doing throughout their life.