There is no minimum amount to start investing in ETFs. Many UK platforms let you begin with as little as £1. The amount matters less than the habit: starting small and investing regularly is a proven approach. That said, before investing anything, make sure you have an emergency fund and no high-interest debt.
What should I do before investing?
Investing is important, but it's not the first financial priority. Before putting money into ETFs, make sure you have:
- An emergency fund: 3-6 months of essential expenses in an easy-access savings account. This is your safety net if you lose your job, your car breaks down, or life throws something unexpected at you
- High-interest debt paid off: If you owe money on credit cards (typically 20-30% interest), paying that off gives you a guaranteed "return" that beats any investment
- Your pension sorted: If your employer offers pension matching, make sure you're contributing enough to get the full match. It's free money
Once those boxes are ticked, you're in a good position to start investing.
How much can you afford?
The honest answer: whatever you can comfortably spare after covering your essential expenses and savings goals.
A common framework is the 50/30/20 rule:
- 50% of your income goes to needs (rent, bills, food, transport)
- 30% goes to wants (entertainment, eating out, hobbies)
- 20% goes to savings and investments
That 20% includes your emergency fund, pension contributions, and any investing. If you're already putting 10% into your pension and 5% into emergency savings, you might have 5% left for investing.
But these are guidelines, not rules. If you can only manage £50 a month, that's a perfectly good starting point.
What is the minimum to start investing?
Many platforms let you invest from as little as £1. You don't need thousands of pounds to begin. Starting with £50 or £100 a month is a great way to:
- Build the habit of investing regularly
- Get comfortable with how markets move
- Learn without putting too much at risk
You can always increase the amount later as your income grows or your confidence builds.
Lump sum vs regular contributions
If you have a larger sum to invest (inheritance, bonus, savings), you have a choice between investing it all at once or spreading it out over several months. We cover this in detail in our article on lump sum vs regular investing.
For money from your regular income, monthly investing is the most practical approach. Set up a standing order and let it run. The consistency matters more than the amount.
Should I use an ISA?
In the UK, you can invest up to £20,000 per tax year in an ISA (Individual Savings Account). Any gains or income inside an ISA are completely tax-free.
If you're just starting out, a Stocks and Shares ISA is the most sensible wrapper for your ETF investments. You won't pay tax on any growth, dividends, or profits.
Most beginners won't come close to the £20,000 limit, and that's fine. Even £100 a month in an ISA adds up over time.
Only invest what you can leave alone
The money you invest should be money you don't need for at least 5 years, ideally longer. Markets go up and down in the short term, and you don't want to be forced to sell during a dip because you need the cash.
If there's any chance you'll need the money within the next few years, keep it in savings instead.
The bottom line
Start with what you can afford. Increase it when you can. The most important thing is getting started and being consistent. A small amount invested regularly will almost always beat a large amount invested "someday."