Free tool
Is your best day going to cost you the payout?
Most funded programmes cap how much of your total profit can come from a single day. The useful question is not what percentage your best day is — it is how much more you need to make before that day stops blocking a withdrawal. This works that out.
Consistency rule calculator
Total profit is the net figure across the whole account, not the sum of your winning days. The limit is whatever your own firm's rulebook says — 30% and 40% are common, but yours is the only one that matters.
There is no list of firms here on purpose. Consistency thresholds change without a changelog, and a page that tells you a firm's number as of some past date is a page that eventually costs somebody a payout. Read your own rulebook and put that number in.
What the rule is actually for
It is not there to make life difficult. A firm funds accounts on the assumption that a passing trader has a repeatable process, and one enormous day inside an otherwise flat month is the signature of a trader who got lucky — or who took a single oversized position that happened to work.
From the firm's side those two are indistinguishable from the one they want to avoid: someone who will eventually take the same oversized position and be wrong. The consistency rule filters for a profit curve built out of many ordinary days rather than one exceptional one.
Which is why the fix is never "trade smaller from now on" alone. The rule looks at the ratio, so it improves either by growing the total or by not having produced the outlier in the first place.
The arithmetic
Three lines, and the third is the one worth knowing:
best day share = best day ÷ total profit
compliant if = share ≤ limit%
profit required = best day ÷ limit%
still to make = profit required − total profitA $2,400 day against a 30% limit needs $8,000 of total profit to be compliant. At $6,000 total you are at 40% and short by $2,000 — and no amount of trading smaller changes that figure, only more profit does.
Keeping days consistent when you run several accounts
The rule is per account, which is where copying trades across funded accounts gets interesting. Accounts of different sizes running the same trade at the same contract count will produce very different profit distributions, and the smallest one is where an outlier day appears first.
Per-account sizing is what keeps the shape of the curve similar across accounts: each account takes the trade at a multiple appropriate to its own balance, so one good day is proportionally similar everywhere rather than enormous on the small account.
Muting an account does the same job on the downside. An account that sits out a bad session does not produce the outlier day in the other direction — and a large losing day is what makes the following recovery day look like an outlier.
Both are in Copy Trader, applied before the order is sent. Whether copying is permitted at all is your firm's decision — see copy trading and prop firms.
Common questions
What is a prop firm consistency rule?
A cap on how much of your total profit may come from a single trading day. If your best day is more than the firm's threshold — commonly around 30% or 40% — of total profit, a payout can be delayed or refused until the ratio improves.
How do I calculate the consistency rule?
Divide your best single day's profit by your total profit. If that percentage is above your firm's limit you are outside the rule. The total profit you need is your best day divided by the limit — a $2,400 day at a 30% limit needs $8,000 total.
How do I fix a consistency rule violation?
Keep trading and grow the total. The rule reads a ratio, so once the large day exists the only lever left is more ordinary profitable days to shrink its share. Trading smaller from now on does not by itself change a ratio that a past day is already in.
When is the consistency rule checked?
Almost always at the point you request a payout rather than continuously. That is why it is worth checking the number before you ask — a request that gets refused is a slower path than a few more sessions first.
What consistency limit do prop firms use?
It varies by firm and often by account type, with figures around 30% to 40% being common. This calculator asks for your limit rather than listing firms, because those thresholds change without notice and a stale number here would cost somebody a payout.
Is my data sent anywhere?
No. The calculator runs entirely in your browser. Nothing you type is transmitted, stored or logged, and the page makes no network request while you use it.
More on free tools
Start on a simulated account.
Connect a sim or evaluation account and run the whole product against it before you point anything at live money. Nothing about the setup changes when you do.