Prop Firm Consistency Rule Calculator
The consistency rule ends more funded challenges than a blown drawdown — traders hit the profit target, then fail because one big day was too large a share of it. Enter your target and your firm's cap to see the most you can earn in a single day, the minimum days you need, and whether your best day passes.
Every prop firm sets its own consistency number and measures it its own way — enter your firm's cap from its rulebook. This tool is educational and does not promise you will pass or get funded.
The maths: your best day must stay at or below the cap × the profit target. Spread evenly, the minimum number of qualifying days is 100% ÷ your cap, rounded up.
What the consistency rule allows
How to use the calculator
- Enter the profit target for your evaluation phase.
- Enter your firm's consistency cap — the maximum share of total profit one day may contribute (read it from the rulebook).
- Optionally add your best single day so far to check whether it already breaks the cap.
- Read the most you can bank in one day and the minimum qualifying days, then plan your risk so no single day exceeds the cap.
Why the consistency rule catches good traders
You brace for risk on red days. The consistency rule bites on green ones: you catch a runner, size up because it's working, bank an outsized day — and now every other day has to be big enough to make that day look normal. You made the rest of the challenge harder by winning too much at once.
The fix is the same discipline that keeps you inside the drawdown limits: a flat, small, pre-defined risk on every trade, a soft cap on daily gains as well as losses, and a plan to reach the target over several days. For the full rulebook, read Prop Firm Challenge Rules and our deep dive on the consistency rule, or prepare properly with the Funded Trader Track.
Frequently asked questions
What is the consistency rule in a prop firm challenge?
It caps how much of your total profit can come from your single best day (some firms measure it per trade). If the cap is 40% and your best day earns $1,500, your total profit must reach at least $3,750 before that day is allowed. It exists so a firm can tell a repeatable process apart from one lucky day.
How do you calculate the consistency rule?
Your best day must be at or below the cap times the profit target. Best-day maximum = cap × target (40% of a $3,000 target is $1,200). The minimum number of qualifying days, spread evenly, is 100% ÷ your cap rounded up — a 40% cap needs at least 3 days, a 25% cap at least 4, a 20% cap at least 5.
Can I fail a challenge even if I hit the profit target?
Yes. If one day contributed more than the cap allows, you can be over the consistency limit even with the account in profit. That is the most common way traders are surprised by it — they pass the target but fail the rule.
How do I pass the consistency rule?
Trade a flat, small, pre-defined risk on every trade, cap your daily gains as well as your losses, and plan to reach the target over several solid days rather than one big one. Consistent sizing makes an over-cap day almost impossible. Always confirm your firm's exact cap in its rulebook.
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The rules that fail most challenge-takers — max daily loss, static vs trailing drawdown, and the consistency rule — in plain English. Enter your email and we'll send the free Rulebook to your inbox.
Educational tool only — not financial advice, and no pass-rate or payout is promised. Every firm sets its own consistency rule; confirm the exact number in your firm's rulebook. Also see our trading blog.