Prop trading is trading a firm's capital rather than your own, keeping an agreed split of the profits - commonly 70-90% to the trader in the retail model. The firm supplies the account and the risk rules; you supply the decisions and wear the evaluation fee if you fail.
It matters because it reprices the trade-off every trader faces. Trading your own $5,000 account, a 10% year is $500. Passing a $100,000 evaluation and making the same 10% is $10,000 before the split - with the same personal loss capped at the fee you paid to enter.
Worked example: pass a 2-Step evaluation at $100,000, make 8% ($8,000) in the first cycle, and an 80% starting split returns $6,400 - rising as scaling plans lift the split. The entry fee, typically a few hundred dollars, is the maximum you can lose.
The mechanics differ by firm type: CFD firms charge one-time evaluation fees, futures firms run monthly combines, and instant-funding firms sell the account outright. The full prop trading guide covers the landscape, and how prop firms work explains what happens to your money at each stage.
Background on who regulates trading venues sits in the SEC investor centre.
Part of the beginner glossary cluster and the full prop firm glossary.