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💸 Fee/Commission Calculator
Commission is one of four charges, and the only one you can read off a schedule before you trade. Lesson 10 prices all four on a single trade.
💡 Fee Impact
Every trade starts in a hole. Calculate break-even BEFORE entering to understand true cost of trading.
Why Fees Kill Scalpers (And Everyone Else)
Every trade you make, you start in a hole. Before the price moves at all, you owe commissions, fees, spreads, and slippage.
⚠️ The Scalper's Death Spiral
Scalper taking 20 trades/day at $10/roundtrip = $200/day in fees = $4,000/month = $48,000/year just to BREAK EVEN.
Most retail traders don't calculate this until they've lost a year wondering why they're "winning trades but losing money."
The Harsh Math
Example: The Hidden Cost
On a $10,000 position:
- Commission: $10 (round-trip)
- SEC/Exchange fees: $20 (0.2% roundtrip)
- Slippage estimate: $10
- Total cost: $40
You need +0.4% move just to break even.
If you scalp 0.3% moves? You're slowly going broke.
The Fee Hierarchy (Best to Worst)
| Strategy | Frequency | Fees as % of Returns | Verdict |
|---|---|---|---|
| Long-term Investing | Monthly+ | 0.01-0.1% | Sustainable |
| Swing Trading | Weekly | 1-2% | Viable |
| Day Trading | Daily | 10-20% | Challenging |
| Scalping | Minutes | 30-60% | Nearly Impossible |
📊 Real Trader Example
Trader scalps 10 trades/day:
- Position size: $5,000 each
- Gross profit/trade: $25 (0.5% avg)
- Fees/trade: $15 (commission + fees)
- Net profit/trade: $10
Daily gross: $250
Daily fees: $150
Daily net: $100
Fees ate 60% of profits. After 6 months, trader made $12k but "should have" made $30k.
Cost Structure Detail
Calculate Break-Even BEFORE Entry
Most traders enter first, then realize they need +0.3-0.5% just to break even.
Formula: Break-even = Entry + (Total Fees / Position Size)
If break-even requires more than 0.3% move, you're either overtrading or using wrong strategy.
Why Market Makers Win
They have structural advantages:
- Earn the spread (you PAY the spread)
- Pay lower commissions (volume discounts)
- Get rebates for adding liquidity (you PAY to take liquidity)
Result: They start with 0.5% advantage on every trade.
Only Tracking Commissions
Commissions are the smallest part of trading costs.
Full cost breakdown:
- Commission: $5-10
- Spread: $10-50 (varies by liquidity)
- Slippage: $5-20 (varies by volatility)
- SEC/Exchange fees: $5-15
🎯 Optimal Trade Frequency
There's a sweet spot for trade frequency:
- Too few trades: Miss opportunities, under-utilize capital
- Too many trades: Death by fees, overtrading
- Sweet spot: 2-10 trades per week for most retail traders
Each trade should offer enough profit potential to justify fee burden (minimum 2:1 R:R after fees).