TopStep Position Size Calculator
Calculate the maximum position size you can take on TopStep without breaching your daily loss limit. Enter your stop loss distance, pip value, and risk percentage to get your safe lot size. TopStep uses trailing eod (floor moves up at end of day) with a 2% daily loss limit and 3% max drawdown. This calculator is based on the rule set reviewed on 2026-03-21.
TopStep enforces a 2% daily loss limit on all accounts. Oversizing a single position is the fastest way to breach this limit. Use this calculator to find the right position size before every trade.
Who should use this calculator
Best for traders who size every entry from a predefined stop loss and need to stay well inside TopStep's trailing eod (floor moves up at end of day).
Where this tool can mislead you
This tool will not save you from slippage, spread expansion, correlated positions, or moving your stop after entry. Treat the output as a ceiling, not a target.
Rule inputs preloaded into this calculator
- •Account sizes reflected: $50,000, $100,000, $150,000
- •Primary drawdown model: Trailing EOD
- •Daily loss rule: 2%
- •Max drawdown rule: 3%
- •Profit split range: 90% to 90%
- •Largest configured account in this calculator: $150,000
Account Size
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Frequently Asked Questions
What is TopStep's daily loss limit?
TopStep's daily loss limit is 2% of your account balance. For the $50,000 account, the daily limit is $1,000.
What drawdown type does TopStep use?
TopStep uses trailing eod (floor moves up at end of day). The floor moves up at end-of-day when your closing balance exceeds the previous peak.
How do I calculate position size for TopStep?
Divide your maximum risk per trade (a fraction of your daily loss limit) by your stop loss distance in pips multiplied by the pip value. For example, on a $50,000 account with a $1,000 daily limit, risking 1% of that limit gives you $10 risk per trade.
What is the safest position size for TopStep?
Most successful prop firm traders risk 0.5-1% of their daily loss limit per trade. On TopStep's $50,000 account, that means risking $5 to $10 per trade. This allows multiple trades per day without approaching the daily limit.
Reviewed | Rules verified against official firm websites
Data source: TopStep (https://www.topstep.com). Current rule set reflected here was reviewed 2026-03-21.
Drawdown type: Trailing EOD (floor moves up at end of day) | Daily limit: 2% | Profit split: 90-90%
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