tradedesk.rbtrading.site / tools / prop firm drawdown calculator

How much can I still lose on a prop firm account?

Take the tighter of two floors: the daily floor (today’s starting balance less the daily limit) and the maximum floor (the starting balance less the maximum limit, or your highest balance less it if the drawdown trails). What you can still lose is your equity now minus that floor. On a $100,000 account with a 5% daily and 10% maximum loss, starting the day at $101,000 with equity at $100,200, the daily floor is $96,000, so $4,200 is left today.

By RB Trading · Updated 20 Oct 2026 · Educational analysis, not financial advice
Prop firm drawdown calculator
$4,200 you can still lose today
Daily floor$96,000$4,200 left
Maximum floor$90,000$10,200 left

The tighter of the two is the daily floor. Open trades count at their floating loss, and so do swaps and commission at most firms.

At 0.50% a trade ($500.00), that is 8 full losses before the daily limit. Each trade uses 10% of the daily limit.

The formulas

daily floor = today’s start − daily % × base  ·  max floor = start (or high) − max % × account

Firms word the daily limit two ways: a percentage of the original account size, or a percentage of the balance (sometimes the equity) at the start of the day. The maximum limit is either static, a fixed floor below the starting balance, or trailing, a floor that rises with your highest balance and usually stops rising once it reaches the starting balance. Open trades count at their floating loss, and at most firms so do swaps and commission. This calculator assumes no firm’s figures: enter the ones your firm’s rules page states.

Worked example

A $100,000 account, 5% daily and 10% maximum, both static and measured from the account size. The day started at $101,000 and equity is $100,200. Daily floor: 101,000 − 5,000 = $96,000, so $4,200 is left today. Maximum floor: 100,000 − 10,000 = $90,000, so $10,200 is left overall. The daily floor is the tighter, so $4,200 is the most you can still lose today. At 0.5% a trade ($500) that is eight full losses.

Make the same account trail from a high of $102,500 and the maximum floor becomes 102,500 − 10,000 = $92,500: still looser than today’s daily floor, but $2,500 tighter than the static one.

Other rules that can end a day

Consistency rules cap how much of your profit can come from one day before a payout. These are the ones read on each firm’s own page:

FirmBest day capApplies toChecked
FunderPro40% of profitOne-Phase 40%, Pro 45%, Classic none, funded none16 Oct 2026
Fintokei40% of profitProTrader and SwiftTrader16 Oct 2026
FTMO50% of profit1-Step 50%, Instant 30%, 2-Step none16 Oct 2026
Audacity Capitalnonethe firm says it does not apply a consistency rule16 Oct 2026
Lark Fundingnoneno consistency rule; a $10k daily and per-trade gain limit instead16 Oct 2026
From each firm’s own help pages, as of the date shown. Rules change; the firm’s page always wins. Firms whose rule could not be read on their own page are left out.

For how a swing trader handles weekends, news windows and copy-trading rules on a challenge, read swing trading a prop firm challenge.

This week’s setups are already mapped

Every Sunday before the open: analysed swing setups across stocks, forex, gold and crypto with the exact entry, stop and target, an alert when one triggers, the live dashboard and the paid Substack letters.

Get this week’s setups
$29/mo · or $199/yr, 20% off the annual · paid Substack letters included · cancel anytime
Or open the free section first: email only, no card

FAQ

How is the daily drawdown calculated on a prop firm account?

As a cash amount below a reference balance: either the original account size or the balance at the start of the day, depending on the firm. Equity, including open trades, must stay above that floor all day.

What is the difference between static and trailing drawdown?

A static floor stays a fixed amount below the starting balance. A trailing floor follows your highest balance up, so profits raise it; most firms stop it once it reaches the starting balance.

Do open trades count toward the daily loss limit?

At most firms, yes: the limit is checked on equity, so a floating loss counts before the trade is closed. Swaps and commission usually count too.

How much should I risk per trade on a prop challenge?

Little enough that several full losses fit inside the daily limit. With a 5% daily limit, 0.5% a trade leaves room for ten losses; 1% leaves five.

Keep readingRisk per trade calculator · Position size calculator · Losing streak odds calculator · Swing trading a prop firm challenge · All calculators