Every result on the calculator comes from the same simulation. This is what it does, what it leaves out, and where the rules it applies come from.
Each run is a full evaluation attempt, traded day by day until the account passes every phase or breaches a rule.
+risk × R or −risk, drawn against your win rate. With trading costs switched on, a fixed cost per trade is taken off both: +risk × (R − cost) or −risk × (1 + cost). The three levels are 0.03R (swing), 0.07R (day trading) and 0.15R (scalping). Leave costs off if your R:R already has them taken out.Trades are treated as independent and identically distributed. Real trading has streaks, correlated positions and news gaps, so treat these as upper bounds rather than forecasts. Spread, commission and slippage are either inside your R:R figure or, with trading costs switched on, a fixed amount per trade; in reality they vary from trade to trade. Swap is not modelled. Payout terms, profit splits, fee refunds, challenge rewards and scaling plans are not scored, and consistency rules are only modelled where a firm publishes one. Trailing drawdowns are modelled without locking at the initial balance, which is the stricter reading.
Prop firm rules change more often than any other number on this page. Every plan here was checked against the firm's own checkout, rules page or help centre, not against review sites, which were wrong on prices or rules for every firm we checked. Each plan's rules, under View rules in the ranking, carry the month they were verified. Read the firm's own rules page before you pay for anything.
This is a probability tool, not financial advice. A high pass probability is a statement about a rule set, not about whether a given firm pays out or stays solvent.