Consistency rule calculator: how much does your best day count?

A daily-profit consistency rule limits how much of a defined profit total can come from one trading day. If the rule is 50% and your best qualifying day produced $1,200, the profit counted in the denominator must be at least $2,400 for that day to represent no more than half. The account’s advertised size is not the denominator.

This guide covers best-day concentration rules, not every policy a prop firm might call “consistency”. Some programmes assess other behaviour or use additional objectives. A low best-day percentage does not prove a strategy is profitable, low-risk or repeatable; it describes the distribution of the results included in one calculation.

Start with your exact account terms. There is no universal 30%, 40%, 50% or 55% rule, and a firm can apply different versions to different programmes or purchase dates.

Consistency percentage = best qualifying day ÷ qualifying profit × 100. “Qualifying profit” means the denominator your rule specifies. When that amount is positive, compare the unrounded result with the stated limit. A display rounded to 50.00% can hide a value slightly above 50%.

Required qualifying profit = best day ÷ limit expressed as a decimal. For a 50% limit, divide by 0.50, not by 50. Estimated gap = the larger of zero or required qualifying profit minus current qualifying profit. If the result falls between currency increments, the minimum usable amount must be rounded upward, not downward.

The gap is conditional arithmetic. It assumes the current best day remains the best day and that added results count in the same window. It is not an amount you can reliably earn, an instruction to increase risk, or a promise that another trade will unlock a withdrawal.

Use the fictional daily results below: +$1,200, +$500, −$300, +$600 and $0. Compare net profit with the sum of profitable days, change the percentage limit and test an additional, separately counted day. The best day and the denominator are recalculated together.

Each row represents a completed trading day under an assumed common cutoff. Amounts are daily results after the trading costs included in this example. The model does not import an account, decide a firm’s eligibility rules, classify trades by session or simulate future returns. The figures are teaching data, not a trading record or forecast. The model treats equality with the selected percentage limit as meeting that condition; use your account’s exact comparison rule.

Add all five daily results: $1,200 + $500 − $300 + $600 + $0 = $2,000 net profit. The best day is $1,200, so its share is $1,200 ÷ $2,000 = 60%. Under a hypothetical limit of 50%, that result is above the threshold.

Keeping the best day fixed gives a required denominator of $1,200 ÷ 0.50 = $2,400. The difference from the current $2,000 is $400. A separate new day of +$400 would bring net profit to $2,400 without replacing the $1,200 best day, giving exactly 50%.

Neither $2,400 nor $400 is the withdrawable amount. The first is a mathematical denominator threshold; the second is a hypothetical change in that denominator. Profit splits, withdrawal caps, minimum days and other conditions require a separate check.

Net profit includes both winning and losing daily results. In the same example, adding only the positive days gives $1,200 + $500 + $600 = $2,300. The −$300 day does not enter that denominator. The best day is still $1,200, so its share becomes about 52.17%, rather than 60%.

At a hypothetical 50% limit, the profitable-days definition also requires a denominator of $2,400, but the difference is now $100. This does not mean the account has recovered its loss. Its net result remains $2,000; only the rule’s calculation basis changed.

Do not substitute gross winning trades for profitable days. If a day contains $700 of gains and $500 of losses, its daily result is $200 before any further costs. A profitable-days total would use the eligible positive daily result, not simply add every winning trade.

Return to the original $2,000 net profit and $1,200 best day. Add a separate new day of +$2,500. Net profit becomes $4,500, but the new best day is also $2,500. The percentage is now $2,500 ÷ $4,500, or about 55.56%.

At 50%, the recalculated required denominator is $5,000. Subtracting the old $400 gap from the new day’s result would miss this change in the numerator. The earlier estimate only applied while the best day stayed at $1,200.

More trades during the current session may also be aggregated into the same day. A second winning trade is not automatically a new day for the formula. This is why the calculator’s additional-day scenario must not be read as a model of adding another trade to today’s unfinished session.

An additional losing day reduces a net-profit denominator while leaving an earlier completed best day unchanged. Its percentage therefore rises while the denominator remains positive. Under a profitable-days-only definition, a separate losing day does not add to that denominator. These are different calculations, not two ways to erase the same loss.

A percentage above 100% can be mathematically valid. For example, a $1,200 best day against $800 of positive net profit gives 150% because other days offset part of that gain. Do not force the result into a 0–100% scale or replace it with zero.

With zero or negative qualifying profit, there is no meaningful positive-profit share to approve. A non-positive total cannot establish that this percentage condition is met; the calculator leaves the share undefined. Deliberately creating losses is not a reliable way to meet a rule and can breach separate loss limits.

The following is a dated comparison of selected rules checked on 12 October 2026, not a complete account assessment. Open the linked policy and your account dashboard before choosing a calculation basis.

FTMO’s objectives distinguish the two 1-Step bases. Its 8 October transition notice sets the new-order boundary at 12 October 2026, 09:00 in MetaTrader platform time, GMT+3. It also moves 1-Step accounts merged on or after 12 October to the new rule. Earlier orders keep the legacy rule through passing, reward withdrawal and subsequent accounts, unless the stated merge rule applies.

Topstep’s consistency policy specifies the Trading Combine’s 55% target. The XFA parameters distinguish its Standard and Consistency paths; the 40% condition belongs to Consistency. Do not apply a selected row to FTMO Instant, FTMO 2-Step, Topstep Standard or a live account without checking that product’s own terms.

Before summing a statement, establish when a trading day starts and ends in the programme’s time zone. A calendar date on your laptop may not match the provider’s session. Also establish whether a daily result is already final, which costs are included and how trades held across the boundary are attributed.

Use one consistent window for both the best day and the denominator. A remaining account balance after a withdrawal is not necessarily profit for the next consistency period. Topstep’s policy, for example, starts the next XFA Consistency window on the trading day after the payout request and excludes that request day from the new window.

Do not silently combine data from a previous challenge, reset account, merged account or earlier payout cycle. Keep the account identifier, period and rule version with your calculation. If the dashboard and your statement disagree, compare those definitions before assuming the arithmetic is wrong.

The consistency result answers how concentrated the counted profit is. It does not answer how much may be paid out, whether an account passed evaluation or whether every trading restriction was respected. Topstep’s payout policy, for example, has conditions and limits beyond the percentage itself.

Loss rules are a separate calculation. An account could meet a consistency percentage and still cross its daily or total loss threshold. Our trailing drawdown guide explains why a threshold can move with an account’s high-water mark. Do not treat room under one metric as permission to exceed another.

Keep any decision to trade separate from the displayed gap. A position-size calculation explores exposure under assumptions; it cannot make the needed future profit certain. Execution costs and slippage can also make a realised daily result differ from a planned one.

• Identify the exact programme, stage, payout path and version that apply to this account.
• Copy the percentage and the denominator definition from the applicable rule; keep the source date.
• Export the relevant daily results and reconcile trading costs, time zone and session boundaries.
• Use the same calculation window for the best day and profit total; check any reset or merge.
• Compare the unrounded percentage, then check minimum days, loss limits and the separate payout policy.

For a discrepancy, send support the account identifier, applicable rule, calculation period, daily results and your arithmetic. Ask which row or definition differs from the dashboard. You do not need to place a new trade to investigate an accounting or eligibility question.

How do I calculate a consistency rule percentage?

Divide the best qualifying day by the positive profit total specified in the rule, then multiply by 100. Use daily results from the same window and confirm whether losing days belong in the denominator.

How much profit is needed for a 30% rule?

If the best day is $1,200 and stays unchanged, the required denominator is $1,200 ÷ 0.30 = $4,000. That is a mathematical threshold, not a promised return or a payout amount. Other account conditions still apply.

Can a losing day fix my consistency percentage?

A separate losing day normally worsens a net-profit ratio while the earlier best day stays fixed. It does not lower a profitable-days-only ratio. Do not deliberately take losses to manipulate a metric; loss limits remain separate.

Does reaching 50% mean I can request a payout?

Only if 50% is the applicable threshold and all other conditions are satisfied. Minimum days, payout windows, account restrictions and withdrawal limits are separate. The calculator cannot grant eligibility.

Does a new best day change the estimated profit gap?

Yes. Recalculate both the numerator and the denominator. A larger best day can increase the required total even though cumulative profit also rose. The old gap was conditional on keeping the best day fixed.

Why is the calculator different from my dashboard?

Check the programme version, net versus positive-day basis, costs, day cutoff and payout window. Also compare unrounded values. This teaching calculator does not import or reproduce a provider’s complete account logic.