Tool

Daily Loss Limit Calculator (Prop Firms)

Last updated: April 9, 2026

See the shutdown line, measure how much daily-loss room is left, and switch between realized-only versus realized-plus-unrealized rule logic. This is built for the kinds of prop-firm daily limits that cause confusion during live trading.

Back to all tools Read the daily-loss guide

Rule definitions vary
Some firms monitor realized-only loss, some use net liquidation, and some use different reset windows. The calculator handles the common interpretations, but you still need the written rulebook.

Calculator

Daily Loss Limit Calculator

Plug in the start-of-day value, the daily-loss rule, and today's P&L. The calculator shows the shutdown line, monitored P&L, and how much rule room is left.

Start-of-day account value

Use the value the firm uses for the daily-loss reset point.

Daily loss limit

Enter the maximum daily loss allowed before you should stop.

Realized P&L today

Negative values mean loss used. Positive values increase room left.

Unrealized P&L right now

Only affects the rule if you choose a mode that includes open P&L.

Rule interpretation

Switch this to match the way your firm monitors daily-loss usage.

StatusNeeds input

Rule mode—

Monitored P&L—

Loss used—

Room left—

Shutdown line—

Current account value—

Loss-limit usage—

Enter the day-start value, rule, and today's P&L to calculate.

Pasteable explanation

This is useful when you want to explain whether you should keep trading or stop for the day under a specific rule interpretation.

How to use it

Enter the start-of-day value the firm uses for the daily rule.
Enter the daily-loss amount in dollars.
Enter today's realized P&L exactly as it stands.
Add current open P&L if your firm includes unrealized loss in the rule.
Use the result as a stop-trading decision aid, not as permission to push right up to the line.

Rule differences to verify

Common pattern
Shutdown line = Start-of-day account value − Daily loss limit

Realized-only rules: usually ignore open P&L until the trade is closed, but some firms still force flattening if the account goes too far underwater.
Realized + unrealized rules: monitor open loss immediately, so your status can change tick by tick while the trade is still open.
Reset windows: some firms reset at a session boundary, some at a local midnight, and some around exchange-specific times.

FAQ

Why can room left be bigger than the original daily limit?

If you are green on the day, you have the original rule buffer plus the profits you would need to give back before reaching the shutdown line.

Should I keep trading if the tool says I still have room?

Not automatically. The output only tells you whether the current rule is breached. It does not decide whether continuing to trade is smart.

What if the firm's dashboard does not match the calculator?

Trust the written policy and the firm's dashboard first. Then check whether the difference is due to reset timing, unrealized P&L treatment, or a different starting value.