Prop Firm Consistency Rule Calculator
Enter the consistency percentage your firm uses and your daily results to see whether your best day is within the rule, how much more profit you need if it is not, and the largest single day that keeps you inside it.
How a consistency rule works
Most consistency rules compare your best trading day with your total profit. With a 40% rule, no single day may make up more than 40% of the profit you have made. The rule stops one large day from carrying an evaluation or a payout, and firms apply it at different stages: some during the evaluation, some only before a payout, and some not at all.
Worked example
A trader has made $1,200, $850, a loss of $300, $2,400 and $600 over five days. Total profit is $4,750 and the best day, $2,400, is 50.5% of it. Under a 40% rule the total must reach $2,400 divided by 0.4, which is $6,000, so another $1,250 of profit is needed on days smaller than $2,400.
Once inside the rule, the largest next day follows from the same sum. If total profit is $6,000, a new day of up to $4,000 keeps the best day at 40% of the new total of $10,000.
What to check in your firm’s rule
- Whether the rule applies to the evaluation, the funded account or only to payout requests.
- Whether a breach fails the account or only delays a payout until the ratio recovers.
- Whether the firm measures closed profit per day or includes open trades at the day’s end.
- Whether the best day resets after each payout or carries over.
Read prop firm consistency rules for how firms differ, and see the best prop firms for firms without one.
Frequently Asked Questions
What is a consistency rule at a prop firm?
A consistency rule limits how much of your total profit can come from a single day. A 40% rule means your best day may be at most 40% of all the profit on the account. Firms use it to reward steady results rather than one large win, and each firm sets its own percentage and the stage it applies to.
What happens if my best day is too large?
At most firms that use the rule, you keep trading and add profit on smaller days until the best day falls within the limit. Some firms only check the rule when you request a payout, so the request waits until the ratio is met. A few treat it as a breach, so read the exact wording in your firm’s terms.
Do losing days count towards the total?
The total is usually your net profit, so losing days reduce it and make the best day a larger share. That is why a loss after a big day can push an account over the limit even though the best day has not changed. The calculator uses net profit across all the days you enter.
Do all prop firms have a consistency rule?
No. Many firms have no consistency rule on at least one of their programs, and others apply it only on funded accounts or only to certain account types. Compare the rule alongside drawdown and payout terms, because a firm without one may set tighter limits elsewhere.