Plan around your profit target first, your minimum trading days second. See the exact split to hit target on time, the minimum EOD reduction if a day breaks the consistency rule, and the max profit allowed per day once you're past the minimum.
| Day | Net P&L |
|---|
The math behind the pass/fail check, explained plainly.
A prop firm typically requires several things to be successful, including: hit a profit target, don't hit the maximum drawdown, trade at least a minimum number of days and obey the consistency rule. The consistency rule (sometimes called a "best day" or "max day" rule) means no single trading day can represent more than a set percentage of your total profit.
If your best day is too large a share of the total, the firm treats the pass as unreliable — it may have come from one lucky trade rather than a repeatable process — and can deny the evaluation or the payout, even after the target and day-count requirements were technically met.
The two most common formulas:
Both versions produce the same practical constraint once you've hit target: your biggest day must stay at or under the limit times your final total profit. This calculator solves for that final total directly, so it works whichever way your firm phrases the rule.
Gross or net? Whether the rule uses gross P&L or net P&L (after commissions and fees) also varies by firm and isn't always spelled out clearly in the rulebook. When in doubt, log net P&L — it's the more conservative number and the one most firms actually use at payout review.
After Day 2, the best day ($2,000) is 85% of the $2,354 total — well over the 50% limit. But the rule is checked against the final total, not this running number, so nothing has failed yet. To fix it before the evaluation ends, either dilute Day 2 with enough additional profit (at least $4,000 total, so $2,000 is exactly 50%), or reduce Day 2 itself before end of day if it's still open. This calculator runs that exact math automatically as you log each day — including which fix applies and the precise dollar amount.
Firm rules change over time and vary by account type and phase — always confirm the current published rule directly with your firm before relying on any third-party summary, including this one. That said, the mechanics generally cluster into a few patterns seen across the industry:
| Pattern | How it typically works | Where it's commonly applied |
|---|---|---|
| % of total profit | Best single day can't exceed a set % of total profit at evaluation completion or payout request. | Common in evaluation/Test phases across many futures prop firms. |
| % of profit target | Best single day is compared against the fixed profit target dollar amount rather than the running total. | Used by some firms as a simpler, fixed-denominator version of the rule. |
| "Best day" payout rule | Applied specifically at payout time — your largest profitable day can't represent more than a set share of total payout profit. | Common on funded/live accounts, not just the evaluation phase. |
| Tier- or phase-limited | Some firms only apply the consistency check on certain account tiers or only during the evaluation ("Test") stage, not on funded accounts. | Varies significantly firm to firm — check which phase your rule applies to. |
Enter your firm's current account size, profit target percentage, consistency limit percentage, and minimum trading days in Step 1. Log each trading day's net P&L in Step 2 as you go. The Recommended Plan updates automatically and will tell you one of three things: how to split your remaining profit evenly across remaining minimum days, the exact dollar reduction needed before end of day if today's P&L breaks the limit, or the maximum (and minimum) P&L allowed per day once you've already met the minimum trading days.
This tool is educational only and is not affiliated with any prop firm. It models common consistency rule mechanics but cannot account for every firm's exact fine print. Always confirm your specific firm's current rule before making trading decisions based on it.