£100/month is more than enough to start building real wealth. Here's exactly how to do it, step by step — using a tax-free Stocks & Shares ISA.
Pick an FCA-regulated investment platform with a Stocks & Shares ISA. For £100/month, Trading 212 is the top choice — zero commission, £1 minimum, and a free ISA. Vanguard is another solid option if you want access to their popular low-cost index funds.
Sign up and select "Stocks & Shares ISA" as your account type. You'll need your National Insurance number and a form of ID. The process takes 5–10 minutes. The ISA wrapper means all your gains are completely tax-free — no capital gains tax, no dividend tax. The annual allowance is £20,000.
Transfer £100 from your bank account. Most platforms accept bank transfer or debit card. On Trading 212, deposits are instant with a debit card. You don't need to invest it all at once — but getting started quickly matters more than timing.
For beginners, a single global index fund is the simplest and most effective choice. Look for the Vanguard FTSE Global All Cap Index Fund or an S&P 500 ETF (like VUSA). These give you instant diversification across hundreds of the world's largest companies in one investment.
The most important step. Set up a standing order or direct debit for £100/month so investing happens automatically. This removes emotion from the process and ensures you invest consistently — which matters far more than trying to time the market.
After 10 years
~£17,400
You put in £12,000
After 20 years
~£52,000
You put in £24,000
After 25 years
~£81,000+
You put in £30,000
Based on 7% average annual returns (typical for a global equity index fund). Figures assume growth inside a Stocks & Shares ISA (tax-free). Past performance does not guarantee future results. Capital at risk.
Want to see your own numbers? Try our free calculator with £100/month pre-filled.
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Capital at risk. This is not financial advice.