Prop Firm Consistency Rule, Explained (With Calculator)

What the consistency rule is

Prop firms want to fund traders who make money repeatedly, not traders who pass with one oversized trade. The consistency rule enforces that by limiting how much of your profit can come from one day. It usually applies when you pass an evaluation or when you request a payout.

The rule is written as a percentage: “no single day may exceed 40% of total profit”. Some firms measure the best day against the profit target instead of total profit, and some apply the rule only on the funded account. The number matters less than when and how it is measured, so read the exact wording for your account.

How it is calculated

Consistency = best day profit ÷ total profit. If that share is above the cap, the fix is more profit, not less: required total profit = best day ÷ cap.

Example: on a $100,000 account with an 8% target ($8,000) and a 40% rule, suppose your best day made $5,000. 5,000 ÷ 8,000 = 62.5%, above the cap. You need total profit of 5,000 ÷ 0.40 = $12,500, so $4,500 more than the target, without breaching any loss limit on the way.

Consistency rule calculator

The calculator uses total profit as the base. If your firm measures against the profit target, enter the target as the total in your own check.

The most common limits

Across the 1,487 accounts in our data where the rule is stated, 65% have a consistency rule and 35% explicitly have none. Where a percentage is listed, the distribution looks like this:

How to live with a consistency rule

• Cap your daily profit, not just your daily loss. With a 40% rule, stop for the day once you are up 40% of the target.
• Keep position size constant. Consistency problems usually start with one day of doubled size.
• Check whether the rule applies to the evaluation, the funded account or both; the answer changes how you trade phase one.
• If your strategy relies on rare big days (breakouts, news), choose from the firms without a consistency rule.

Next steps

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