Ask five people how much you need to start investing and you'll get five numbers, all wrong. Here is the honest one — and why the amount matters less than the order.
Zero dollars: the learning phase
Everything that makes you a good investor is free. Vocabulary, the simulator, calculators, the habit of writing down why you bought something — none of it needs money. If you cannot explain what an index fund is, adding cash would not have helped anyway.
Practising with $10,000 of fake money teaches the same lessons as real money, without the tuition fee of losing your own.
The real minimum is smaller than you think
When you and a parent decide you're ready, most brokerages let you buy fractions of a share. One slice of a big index fund can cost a few dollars — less than the pizza you ate last weekend.
If you are under 18, the account is usually a custodial account a parent or guardian opens with you. Check our under-18 platform list for what applies in your country.
Small amounts are fine — fees are what you should watch, not the starting number.
A $5 fee on a $20 investment is 25% gone before the market does anything.
The habit beats the amount
Someone who invests $10 every month from 16 will, over decades, usually end up far ahead of someone who dropped in $500 once at 25 — not because of the total, but because of the years of compounding and the habit itself.
You cannot control what the market does next year. You fully control whether the habit exists.
The takeaway
Start learning today for $0. When real money comes later, start small, watch fees, and protect the habit — that combination is worth more than any lump sum.