How to Calculate Prop Firm Drawdown: Formulas and Examples

To calculate prop firm drawdown, find the floor your account cannot close or trade below, then subtract it from your current account value. The floor depends on the rule: static rules anchor it to your starting balance, end-of-day (EOD) trailing rules anchor it to your highest closing balance, and intraday trailing rules anchor it to the highest level reached at any moment. The gap between your account value and that floor is your buffer.

Below you get each formula, worked examples with real numbers, the checks to run before you trust any calculator, and how daily loss limits differ from maximum drawdown.

TL;DR

• Floor = reference point − drawdown amount. The reference point is what changes between static, EOD trailing and intraday trailing rules.
• Buffer = current breach-test value − current floor. Always check whether the firm tests balance or equity.
• A percentage alone does not define the rule. Read what it is anchored to, when the floor updates, and whether it locks or caps.
• Profirms charges a one-time fee (no subscription, no activation fee), and its max-loss floor never trails intraday. Evaluation and funded accounts are simulated.

Table of Contents

• Two different things called drawdown
• The three formulas
• Worked example: one account, three rules
• Calculate your remaining buffer
• What to check before you trust any calculator
• Maximum drawdown vs daily loss limit
• Why recovery gets harder as drawdown grows
• How Profirms calculates it
• Choose an account size with your buffer in mind
• Common calculation mistakes
• FAQ
• Sources

Two different things called drawdown

Traders use "drawdown" for two separate ideas, and mixing them up causes most calculation mistakes.

Performance drawdown measures how far an account fell from a peak. The standard formula is (peak value − trough value) ÷ peak value × 100. A $20,000 peak that falls to $18,000 is a 10% drawdown, as the standard definition shows. Maximum drawdown is the largest such peak-to-trough decline before a new peak is reached, measured as (trough − peak) ÷ peak.

Rule drawdown is the loss limit a prop firm sets. It is a dollar floor. Touch it and the account is closed. This is the number that decides whether you keep your account, so it is the one the rest of this guide calculates.

The two connect through simple arithmetic. The drawdown amount in dollars is usually the account size times the maximum-drawdown percentage, or a stated dollar figure. Here is what a 10% limit looks like at common account sizes, using a published example table:

Many futures accounts use a smaller share of account size than 10%, so always take the dollar figure from the rulebook, not from memory.

The three formulas

Every drawdown rule fits one pattern: floor = reference point − drawdown amount. What counts as the reference point defines the rule. The three common versions are:

1. Static: floor = starting balance − drawdown. The floor never moves.
2. End-of-day trailing: floor = highest end-of-day balance − drawdown. It can rise only when a day closes at a new high.
3. Intraday trailing: floor = highest level reached during the day − drawdown. Some firms measure this on equity, so open profit can lift the floor.

Some firms add a lock or cap. A locking variant is a trailing floor that never rises above the starting balance. Once the cap is reached, the rule behaves like a static rule from then on.

Static drawdown

On a $100,000 account with a $10,000 limit, the floor is $90,000. It does not rise when the account profits. If you grow the account to $108,000, your buffer is $18,000. Static is the easiest rule to calculate because you do the subtraction once.

End-of-day trailing drawdown

The reference point is the highest completed day-end balance, with the starting balance as a minimum. The floor can rise only at the specified day-end update. EOD is a timing rule, not a synonym for static: the floor may sit still all session and still climb between sessions.

Example: you hold a $10,000 allowance and your highest qualifying close is $106,000. The floor is $96,000, and a losing close normally does not move it down.

Intraday trailing drawdown

Here the high-water mark is the highest balance at any moment, including open profit. That is the rule that surprises people. A trade that runs $1,500 in your favor and comes back to breakeven still leaves the floor $1,500 higher than it was that morning.

For a closer look at how this changes your risk in practice, read our breakdown of how a 5% EOD limit can feel like 10% intraday.

Worked example: one account, three rules

Take a $50,000 account with a $2,000 drawdown. Over three sessions the closed results are +$1,000, +$1,500 and −$800. The closing balances are $51,000, $52,500 and $51,700.

Now apply each rule at the end of day three:

Same trades, three different answers. The EOD floor comes from the best close ($52,500) minus $2,000. The capped version stops the floor at $50,000, the starting balance.

Notice what the losing day did. It cost $800 of balance, but under EOD trailing the floor stayed at $50,500. Your buffer shrank from $2,000 to $1,200 in one session. That is the math trap in trailing rules: profit makes the floor rise, and a pullback then eats the cushion you thought you had. Our guide to the math traps that catch funded traders goes deeper on this pattern.

A hypothetical intraday version

Add one assumption to the same account: on day two the balance touched $53,000 intraday before closing at $52,500. On an intraday trailing rule, the floor is $53,000 − $2,000 = $51,000, even though the close was lower. Your closing balance of $51,700 on day three leaves only $700. This figure is our own illustration, not a published case, but it shows why the same history can leave you $1,200 or $700 from the line.

Calculate your remaining buffer

The buffer formula is simple: current breach-test value − current active floor. With $50,600 of equity and a $48,500 floor, you have $2,100 of headroom.

The important phrase is "breach-test value". Firms differ on what they test:

• Balance counts only closed trades.
• Equity is balance plus open profit or loss, minus applicable trading costs.

If the rule tests equity, an open losing trade shrinks your buffer in real time, even though your balance has not changed. If open profit counts, a later reversal can consume buffer while the balance sits still. Commissions and fees count too when equity is the test.

A quick routine before each session:

1. Write down the dollar floor from your dashboard or rulebook.
2. Write down your current balance or equity, whichever the rule tests.
3. Subtract. That is the most you can lose before the account closes.
4. Divide by your risk per trade or your per-contract stop to see how many full losses you can absorb.

That last step matters most. A $1,200 buffer with a $400 average loss means three losers. Treat that count, not the dollar figure, as your real limit.

What to check before you trust any calculator

Online calculators only compute what you type. A percentage alone does not define the formula: a firm may anchor the floor to starting balance, daily balance, highest close or live equity. Before you enter numbers, confirm these items in the rulebook:

• Starting reference: starting balance, daily balance, highest close or live equity.
• Static or trailing: and if trailing, what raises it.
• Balance or equity: which one sets the high-water mark, and which one is tested.
• Open profit: does it count toward the high-water mark?
• Update time: when the EOD floor recalculates.
• Lock or cap: does the trail stop at the starting balance?
• Costs: are commissions and fees included in equity?
• Touch rule: what happens when the threshold is hit, and whether touching it counts as a breach.

This checklist follows the items a drawdown guide recommends confirming. Save the answers next to your calculation. If a firm changes its rulebook, you will know which number went stale.

See how static and trailing rules compare over a full evaluation in our piece on trailing vs static drawdown.

Maximum drawdown vs daily loss limit

These are two separate controls, and a firm may use one, the other or both.

• Maximum drawdown (overall max loss) caps total decline from a reference point across the life of the account. Breaching it ends the account.
• Daily loss limit caps how much you can lose in a single trading day. Depending on the firm, hitting it either pauses trading until the next session or counts as a breach. The rulebook tells you which.

To calculate a daily limit, take the daily allowance, then subtract what the account is already down today. What remains is your daily buffer. Your effective limit each day is whichever is closer: the daily buffer or the overall buffer.

Example: your overall buffer is $1,200 and your daily limit has $1,000 left. The daily limit binds first. If the overall buffer were $600, it binds first. Run both numbers every session. For the difference in consequences, see why daily loss limits pause trading but drawdown can end an account.

Why recovery gets harder as drawdown grows

Percent drawdown is asymmetric. A 10% loss needs an 11.1% gain to recover. A 20% loss needs 25%. A 50% loss needs 100%. The arithmetic is (peak ÷ current) − 1.

Size is only part of the picture. Recovery time also matters when you judge risk. On a funded account the lesson is practical: a trailing floor leaves you little room to dig out, so small losses are far easier to repair than large ones.

Our drawdown-first plan for evaluations turns this into position-sizing rules. For a broader view of the controls that trip traders, see the five core prop firm risk controls.

How Profirms calculates it

We built our rules so the calculation stays short.

• End-of-day drawdown, never trailing intraday. The loss threshold locks at the previous day's close. The max-loss floor does not move while you trade, so open profit cannot lift it and a reversal cannot catch you out. You can recover losses within a single session.
• No consistency rule and no minimum trading days. Nothing else to calculate.
• One-time fee. Profirms charges a one-time fee, never a subscription or an activation fee.
• 90% of every payout is yours from the first payout.
• Simulated accounts. Evaluation and funded accounts are simulated. Trading carries risk, and we do not promise profits.

Because the floor is set at the prior close, your starting-point math each morning is one subtraction: today's account value minus the locked floor. You can check it against the free EOD drawdown tracker, and read how end-of-day drawdown measures your distance to the threshold.

Choose an account size with your buffer in mind

A bigger account gives a bigger dollar allowance, but the better question is how many full losses your risk per trade can absorb. Current one-time prices for our futures accounts, as published:

CFD and crypto accounts are also available, with their own rules on the CFD rules and crypto rules pages. Every order is fully refundable until its login is delivered, and logins are emailed as each account is set up. Compare the options at Profirms pricing, then check the payout details under payouts.

Common calculation mistakes

• Using starting balance for a trailing rule. After a profitable week your floor is higher than the starting balance minus drawdown.
• Ignoring open profit. On intraday equity-based rules, an unrealized spike raises the floor.
• Forgetting costs. Commissions reduce equity and therefore your buffer.
• Mixing up daily and overall limits. Check both every session.
• Trusting a status label. A calculator cannot certify your account. The firm's own dashboard and rulebook decide.

FAQ

What is the formula for calculating drawdown?

For performance, drawdown % = (peak − trough) ÷ peak × 100. A fall from $20,000 to $18,000 is 10%. For a prop firm limit, use floor = reference point − drawdown amount, then buffer = current account value − floor.

How do I calculate maximum drawdown on a funded account?

Multiply the account size by the maximum-drawdown percentage, or use the dollar figure in the rulebook. Then set the reference point: starting balance for static rules, highest close for EOD trailing, highest intraday level for intraday trailing. Subtract the drawdown from that reference to get your floor.

Does open profit raise my drawdown floor?

It depends on the rule. On intraday trailing rules that measure equity, open profit can raise the high-water mark. On EOD rules, only the closing balance counts at the update. Check the rulebook for which value the firm uses.

What is the difference between a daily loss limit and max drawdown?

A daily loss limit caps losses within one session, while maximum drawdown caps total decline over the life of the account. Your real limit each day is whichever buffer is smaller. Read the rulebook to see whether each one pauses trading or closes the account.

Sources

• Drawdown definition and percentage formula
• Maximum drawdown definition
• Static, trailing and daily loss drawdown guide
• Static, trailing and EOD drawdown formulas
• Static vs trailing drawdown explained
• Static, trailing and locking calculator with worked example
• Maximum drawdown example table and locking floors

Recommended

• Trailing vs Static Drawdown: The $90,000 Line That Ends Prop Accounts
• Trailing Drawdown: The Math Traps That Catch Funded Traders
• Pass a Prop Firm Challenge: Risk Math for 3 Drawdown Types
• Risk Management for Evaluations: A Drawdown-First Plan

Risk disclosure: Trading involves substantial risk of loss and is not suitable for every investor. Profirms runs simulated evaluation and funded trading programs, is not a broker-dealer or futures commission merchant and does not provide investment advice. Hypothetical or simulated performance results have inherent limitations, and no representation is made that any account will achieve profits or losses similar to those shown. Past performance is not indicative of future results.