What Is a Prop Firm Consistency Rule?
A consistency rule limits how much one profitable day can contribute to a measured profit total. This prop firm consistency calculator uses best day ÷ total net profit. It suits that specific method, with an inclusive boundary. Your firm may use different periods, denominators or payout conditions, so read its definition first.
Quick example: a $1,500 best day with $2,400 net profit is 62.5%—above a 40% limit.
How to Use the Prop Firm Consistency Calculator
- Enter total net profit for the assessment period, including losing days and relevant charges.
- Enter your highest profitable day from that same period, using the firm’s daily cutoff.
- Select 20%, 30%, 40%, 50% or a custom limit. Read your percentage, required total and additional profit.
A best day can exceed net profit after losses; the result may exceed 100%. Zero or negative net profit has no usable positive-profit ratio here. Verify your period before interpreting the result.
Prop Firm Consistency Rule Formula
Minimum total = best day ÷ (limit ÷ 100)
Additional profit = max(0, minimum total − current total)
| Calculation | Result |
|---|---|
| $1,500 ÷ $2,400 × 100 | 62.5% — above limit |
| $1,500 ÷ 0.40 | $3,750 minimum total |
| $3,750 − $2,400 | $1,350 additional net profit |
The target rounds up to a cent; status uses unrounded comparisons. This estimate assumes no new highest day. Losses increase the remaining amount, and a larger winning day raises the target.
20%, 30%, 40%, and 50% Consistency Rules Explained
| Limit | Best day’s maximum share | Required net profit |
|---|---|---|
| 20% | One fifth | $2,500.00 |
| 30% | Three tenths | $1,666.67 |
| 40% | Two fifths | $1,250.00 |
| 50% | One half | $1,000.00 |
These are mathematical examples, not a list of firms’ current rules. “At most 40%” permits equality; “below 40%” does not. This tool uses “at most”. Confirm the wording before relying on a boundary result.
What Happens If You Exceed the Consistency Rule?
Check your programme’s agreement. Exceeding a payout condition may mean waiting until the distribution qualifies; breaching an evaluation rule may have another consequence. E8’s programme-specific consistency guidance is an example of why one universal consequence would be misleading.
Do not increase risk to chase the displayed shortfall. Revisit common mistakes in funded trading accounts and use the position size calculator for a separate risk check.
Frequently Asked Questions
How do I calculate my prop firm consistency percentage?
For the method used here, divide your highest profitable trading day by total net profit for the same assessment period, then multiply by 100. A $1,500 best day divided by $2,400 net profit is 62.5%. Check whether your firm uses this denominator.
What is the 20% consistency rule in prop trading?
Under a best-day-to-net-profit method, a 20% limit means your largest profitable day can contribute at most one fifth of total net profit. A $500 best day needs at least $2,500 total net profit. Some firms define the calculation or boundary differently.
What happens if I break the consistency rule?
The consequence depends on your agreement. A firm may postpone payout eligibility until your profit distribution meets its rule, while another programme may impose a breach or other restriction. Read the exact assessment-period, reset and payout terms; this calculator cannot determine your account’s eligibility.