How Do You Calculate a Prop Firm Consistency Rule?
How a prop firm consistency percentage is calculated, a worked example, and how to plan trading days so one big day doesn't block your payout.
What a consistency rule measures
Most consistency rules compare your best single day to your total profit. If your best day is too large a share of the total, you either can't pass or can't request a payout yet. The percentage and whether it applies to the evaluation, the funded account, or both depends on the firm.
Worked example with a 40% rule
Hypothetical: you've made $3,000 total and your best day was $1,500. That's 50% of your total — over a 40% limit. To get under 40%, your total needs to reach at least $3,750 ($1,500 ÷ 0.40) while the best day stays $1,500. So you need about $750 more spread over other days.
Worked example with a 30% rule
Same $1,500 best day under a 30% rule: $1,500 ÷ 0.30 = $5,000 total needed. Stricter rules mean a big day can force many more trading days, so the percentage matters a lot.
How to avoid the trap
Set a daily profit cap near your target share. If your goal is $3,000 under a 40% rule, stopping around $1,000–$1,200 per day keeps you safe without doing math later.
Check your firm's exact wording
Some firms count only winning days, some measure against the profit target instead of total profit. Read the official rule on the firm's card before relying on any example.
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