# Prop firm consistency rule, explained with numbers

> Best day, total profit, profit target: how the consistency rule is calculated, what it holds back, and how to trade with it day by day.

Published October 14, 2026 · By the fillprint desk

A consistency rule caps how much of your profit can come from a single day. The common form says your best day may not exceed a set percentage of your total profit, or of the profit target. It does not usually fail the account: it holds back the pass or the payout until your other days catch up. The arithmetic fits on one line: the total you need is your best day divided by the percentage.

## What the consistency rule measures

The consistency rule compares your single best trading day with the profit you have made overall. If one day carries too large a share, you are not compliant yet, even if the balance is above the target.

Firms write it in two main ways:

- **Best day vs total profit**: no single day may be more than X% of the total net profit on the account. This is the most common form. The bar moves as you trade.
- **Best day vs profit target**: no single day may be more than X% of the profit target. The bar is fixed before you place a trade, which makes it easier to plan around.

The percentage itself varies widely, and some firms set a different one in the evaluation and on the funded account. The exact wording matters too: "no more than 50%" and "less than 50%" are not the same thing when your best day lands exactly on the line. Read the firm's own rules page for the sentence they actually use.

## How the consistency rule is calculated

You divide your best day by your total profit and compare the result with the firm's percentage. Turned around, that gives the only formula you need:

`total profit needed = best day ÷ percentage`

### A worked example at 30% and 50%

Take a hypothetical 50K evaluation with a 3,000 dollar profit target. Over four days you make +300, +1,500, +400 and +800. Total profit: 3,000. Best day: 1,500. Your best day is 50% of your total.

- **With a 50% rule**: `1,500 ÷ 0.50 = 3,000`. You are exactly on the line. Under "no more than 50%" you are compliant. Under "less than 50%" you need one more green day, even a small one.
- **With a 30% rule**: `1,500 ÷ 0.30 = 5,000`. You need 5,000 of total profit, so 2,000 more on top of what you have. And none of the days that add it may go above 1,500, or the best day changes and the bar rises with it.

Now change one number. Same account, same 3,000 total, but the big day was 2,000 instead of 1,500. With a 50% rule you need `2,000 ÷ 0.50 = 4,000`: one more thousand. With a 30% rule you need `2,000 ÷ 0.30 = 6,667`: more than double the target. One outsized day quietly turned a 3,000 dollar target into a 6,667 dollar one.

### Best day vs total profit needed

The table reads the formula for a few best days. The total is net profit on the account; round up to stay safe.

| Best day | At 20% | At 30% | At 40% | At 50% |
|---|---|---|---|---|
| 500 | 2,500 | 1,667 | 1,250 | 1,000 |
| 1,000 | 5,000 | 3,334 | 2,500 | 2,000 |
| 1,500 | 7,500 | 5,000 | 3,750 | 3,000 |
| 2,000 | 10,000 | 6,667 | 5,000 | 4,000 |
| 3,000 | 15,000 | 10,000 | 7,500 | 6,000 |

> **A losing day makes it worse**
> Your best day never shrinks, but your total does. Say you are at 3,000 with a 1,500 best day under a 50% rule, then lose 500. Your total is 2,500, your ratio is 60%, and you need 500 back just to return to compliance. Under a consistency rule, a red day costs you twice.

## Consistency in the evaluation vs at payout

In the evaluation, the consistency rule decides when you pass. On a funded account, it decides when you can withdraw. The mechanics are the same; what they hold back is different.

**In the evaluation**, hitting the profit target is not enough if one day carries too much of it. Most firms simply keep the evaluation open until the ratio comes back in line: you keep trading, the target effectively rises, and the drawdown keeps applying the whole time.

**At payout**, the rule usually looks at the profit you are asking to withdraw, often the profit made since your last payout or within the current payout cycle. A big day on a funded account does not lose you the account at most firms, but it can delay the withdrawal until enough normal days follow. The window, the percentage and what resets after a payout all differ by firm, so check them before your first request. Payout rules have more moving parts than this one: we cover them in [prop firm payout rules explained](https://fillprint.io/en/journal/prop-firm-payout-rules-explained).

## Why prop firms use a consistency rule

Firms use a consistency rule to separate a repeatable method from one lucky or oversized day. Without it, the cheapest way to pass is to buy an evaluation, max out the contracts on a news release and hope.

For the firm, that pattern is a cost. A trader who passed on one day of outsized risk tends to trade the funded account the same way, and the funded account is where the firm pays out. The rule forces the profit to be spread over several sessions, which is closer to how a trader with an actual edge makes money. You can disagree with where a firm sets the bar, but the logic is not arbitrary.

It also explains why instant-funding accounts often carry one, and why many firms keep it at payout: that is where the firm has the most at stake.

## How it interacts with the profit target and minimum days

The consistency rule raises the profit target in practice, and it sets its own minimum number of winning days. Both can be stricter than the rules printed next to them.

**The target becomes a floor.** You need the target and the consistency ratio at the same time. If your best day divided by the percentage is above the target, that number is your real target.

**The percentage implies a minimum number of green days.** If no day may exceed 30% of the total, you need at least four winning days to get there, because three days of 30% only make 90%. The rule of thumb is one divided by the percentage, rounded up:

| Rule | Minimum winning days implied |
|---|---|
| 50% | 2 |
| 40% | 3 |
| 30% | 4 |
| 20% | 5 |

Those are winning days of equal size, with no losing day in between. Real trading needs more. If the firm also has a minimum number of trading days, the stricter of the two applies, and with a tight consistency rule it is usually the consistency rule. Our guide on [how to pass a futures prop firm evaluation](https://fillprint.io/en/journal/how-to-pass-a-futures-prop-firm-evaluation) puts all these rules into one plan.

## The consistency rule, firm by firm

The table below is read from the live board, on each firm's reference account. When the evaluation and the funded account use different percentages, both are shown.



A percentage alone does not tell you which form the firm uses (total profit or profit target) or which window it applies at payout. Open the firm's page from the table, then its own rules page, before you trade a single day.

## How to trade with a consistency rule

Trading with a consistency rule comes down to capping your good days, not just your bad ones. Three habits do most of the work.

**Cap your daily target.** Multiply the profit target by the percentage and stay under it with some margin. With a hypothetical 3,000 target and a 30% rule, the cap is 900: plan to stop around 700 or 800. If the rule is measured against total profit rather than the target, the same cap keeps you safe as long as you reach the target.

**Stop after a big day.** If a session runs well past your cap, the damage is done and more trading only makes it worse. Close the platform. The fix is several normal days, not a bigger one.

**Spread profits and size for it.** A strategy built on one large winner per week fits badly under a strict consistency rule. Smaller size and more ordinary days fit better, and they also protect the drawdown. Keep a running tally of best day and total after each session: the formula takes ten seconds, and it tells you exactly how much you still need.

None of this guarantees a pass. It just stops a rule you can calculate in advance from being the one that holds you back.

Before you choose an account, compare the percentage, the form and the window side by side on the [prop firm board](https://fillprint.io/en/prop-firms).

[Compare consistency rules on the board](https://fillprint.io/en/prop-firms)

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## Terms used in this article
- [Consistency rule](https://fillprint.io/en/glossary/consistency-rule)

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