Consistency rules explained: how prop firms limit your biggest day

A consistency rule is a prop firm’s way of asking whether your profit came from a repeatable process or from one unusually large day. It does not stop you trading. It decides whether a passed evaluation counts, or whether a payout request can go through, by comparing your largest day, your trade sizes or your number of winning days with the rest of your record.

These rules sit alongside the loss limits covered in our guide to drawdown rules, and they catch out traders who never came close to a loss limit. This guide covers the three common types, why firms use them, how they affect payouts, and how to do the arithmetic before a rule costs you a cycle.

The three common types

Firms word their rules differently, but nearly all of them fall into one of three groups:

• Largest-day share. No single day may make up more than a set percentage of your profit, for example 40% or 50%. This is the most common version.
• Minimum profitable days. You need a minimum number of winning days, often with a floor on what counts as a winning day, such as 0.5% of the starting balance.
• Lot-size consistency. Your position sizes must stay within a range around your own average, so one oversized trade cannot carry the account.

A few firms use variations on the same idea: a limit on the share of profit from a single trade rather than a single day, or a cap on how much profit per day counts toward the target.

Why firms use them

An evaluation is short. With a 10% target and a 10% loss limit, a trader who sizes up heavily on one news release can pass in a single lucky session, and the firm cannot tell that apart from skill without looking at the shape of the results. Consistency rules are the filter.

There is a business reason too. Most funded accounts are simulated, and the firm pays rewards from its own funds. A firm that paid out on every one-day spike would be paying for luck rather than for a trader it expects to keep profitable. Firms describe these rules as risk management. From the trader’s side, it helps to treat them as part of the price of the account, alongside the fee and the loss limits.

The rules also differ by stage. Among the firms we track, some apply a largest-day rule only in the evaluation, some only to funded payouts, and some to both. Instant-funding accounts tend to have the tightest limits, mostly between 15% and 30%, while evaluation and funded-account versions mostly sit between 30% and 50%. Our rules comparison and each firm’s profile show which applies where.

The largest-day rule

The basic test is one division: your largest daily profit divided by your total profit. If the result is above the firm’s limit, you have not met the rule yet.

Example: a 50% rule in an evaluation

Take a $100,000 evaluation with a 10% profit target ($10,000) and a rule that no day may exceed 50% of total profit. These are illustrative numbers.

Day	Result
1	+$6,000
2	+$1,500
3	+$1,000
4	+$1,500
Total	+$10,000

The target is reached on day 4, but the largest day is $6,000, which is 60% of $10,000. The account has not passed. To bring that day down to 50%, total profit has to reach $12,000 ($6,000 divided by 0.50). The trader needs another $2,000, and every losing day along the way raises that figure.

The required total is always the largest day divided by the limit, so the tighter the rule, the faster it grows:

Limit	Total profit needed with a $6,000 largest day	Profit needed beyond the $10,000 target
50%	$12,000	$2,000
40%	$15,000	$5,000
30%	$20,000	$10,000
20%	$30,000	$20,000

The profit is not lost. The account is simply not finished, and the extra trading needed keeps it exposed to the loss limits for longer.

Net profit or profitable days: the denominator matters

Firms do not all divide by the same number. Some use net profit, which includes losing days. Others use the sum of profitable days only, which ignores losses. The difference can decide a payout.

Example, a funded payout cycle with a 40% limit:

• Days: +$800, +$400, +$300, minus $200, +$500
• Net profit: $1,800, so the largest day is 44% of it
• Sum of profitable days: $2,000, so the largest day is exactly 40%

Under a net-profit rule this cycle fails. Under a profitable-days rule it passes if the wording is “no more than 40%” and fails if it is “under 40%”. Small words matter.

Firms also change the measure over time. FTMO, for example, applies a rule on its 1-Step that the largest day may not exceed 50% of total profit, in the Challenge and on the funded account, for orders created from 12 October 2026. Older accounts keep the earlier version, which measured against the profit of positive days only. Its Instant Account has a 30% limit that must be met before a reward can be paid.

When the rule is measured against the profit target

Some firms compare your largest day with the profit target rather than your total profit. Example: a $50,000 account with a $3,000 target and a rule that no day may exceed 50% of the target, which is $1,500. A $2,000 day breaks that. Depending on the firm, either the account cannot pass until the rule is met, or the target itself rises so the largest day fits, in this case to $4,000.

Topstep uses this structure in its Trading Combine: the largest day must stay at or below 55% of the profit target, or the target rises.

How many days a rule really requires

A largest-day limit also sets an unwritten minimum number of days. At “no more than 50%”, two equal days can pass. At 40%, you need at least three days, because with two days one of them must hold at least half the profit. At “under 30%”, you need at least four. Our firm data notes this for several futures programs, where a 40% evaluation rule means at least three trading days even though no minimum is stated.

Minimum profitable days

The second type counts winning days. A typical rule sets a number of days, each above a floor. Several firms we track define a profitable day as at least 0.5% of the starting balance.

Example: a $100,000 account that needs three profitable days of at least 0.5% ($500) each.

• Day 1: +$2,500 (counts)
• Day 2: +$450 (does not count, under $500)
• Day 3: +$900 (counts)
• Day 4: minus $300 (does not count)
• Day 5: +$1,200 (counts)

The trader reaches three qualifying days on day 5. The $450 day helps the balance but not the count.

Day counts often decide payout timing as well. Topstep’s funded accounts offer a choice, made when the account is activated, between a path that needs five winning days of $150 or more for each payout and a path that needs three traded days with the largest day at or below 40% of net profit. The two paths suit different styles, so it is worth deciding in advance which one fits yours.

Check how the firm defines a day. Most use the platform server’s day or a fixed time zone, and a trade closed after the cut-off counts toward the next day.

Lot-size consistency

The third type looks at position size. The rule usually says each trade must sit within a band around your average size. Bands vary between firms, so the numbers below are illustrative.

Example: a rule that every trade must be between half and double your average lot size. A trader opens four trades of 1.0 lot, then one of 3.0 lots. The average across all five trades is 1.4 lots, so the allowed maximum is 2.8 lots, and the 3.0-lot trade is out of range. The large trade raised the average itself, yet still failed the test.

Some firms write this more loosely, as a ban on position sizes or trade counts far out of line with your usual activity, which leaves the judgement to the firm’s risk team. FTMO’s risk rules include a clause of this kind. A loose rule is harder to plan around, so keep sizes steady where a firm uses one.

How consistency rules affect payouts

On funded accounts, consistency rules mostly act as a gate on payout requests. The request stays unavailable, or is declined, until the numbers line up. A few patterns show up across the firms we track:

• Faster payouts, stricter rules. Some firms offer a standard fixed cycle with no largest-day rule and an on-demand option that adds one, typically at 35% to 40%.
• Per cycle or per account. Most rules reset after each approved payout, so each cycle is judged on its own. A few count the largest day ever recorded on the account, which is far harder to dilute.
• Moving limits. Some accounts change the limit from one payout to the next.
• Stacked conditions. A consistency rule rarely works alone. It sits on top of minimum payout amounts, buffers and per-request caps, covered in our guide to profit split and payouts.

Because rules differ by stage, read the funded-account terms as closely as the evaluation terms. A firm with no consistency rule in the evaluation can still apply one to every payout.

Planning around the rule

You cannot choose which day the market hands you a large move, but you can do the arithmetic in advance:

1. Work out your ceiling per day. With a 40% rule and a $10,000 target, any day above $4,000 means you will need more total profit than the target.
2. If you have already had a large day, divide it by the limit to find your real target, then size the remaining days so a loss does not push it further away.
3. Count the days the rule implies, and plan for them on top of any stated minimum.
4. If your strategy depends on occasional large moves, look for programs where the rule is looser or absent at the stage you care about.

What to check before you buy

• Which stages the rule applies to: evaluation, funded payouts, or both.
• Whether it divides by net profit, profitable days or the profit target.
• Whether the limit is “under” or “no more than” the percentage.
• Whether it resets after each payout or tracks the whole account.
• What happens when it is not met: a blocked request, a higher target, removed profit or a closed account.
• How a trading day is defined and which time zone it uses.
• Whether the rule changed recently, and which version applies to your purchase date.

You can compare these terms across firms on the challenge comparison and on each firm’s profile. Most traders do not pass evaluations, and fees are usually not refunded, so a rule you did not plan for is an expensive surprise.