How to Calculate Options P&L

Why P&L Math Matters

Knowing your max profit, max loss, and breakeven before entering a trade is non-negotiable. If you cannot calculate these numbers, you should not be placing the trade. This guide covers the formulas for every common options position.

Step 1: Single Long Call

Bought a call:

• Cost: Premium paid x 100 (per contract)
• Breakeven: Strike + premium paid
• Max loss: Premium paid x 100
• P&L at expiration: (Stock price - strike - premium) x 100 (if stock is above strike, otherwise you lose the premium)

Example: Buy the $100 call for $3.00. Stock goes to $108.

• P&L: ($108 - $100 - $3) x 100 = $500 profit

Step 2: Single Long Put

Bought a put:

• Cost: Premium paid x 100
• Breakeven: Strike - premium paid
• Max loss: Premium paid x 100
• P&L at expiration: (Strike - stock price - premium) x 100 (if stock is below strike)

Example: Buy the $100 put for $2.50. Stock drops to $93.

• P&L: ($100 - $93 - $2.50) x 100 = $450 profit

Step 3: Selling Options (Short Call or Put)

When you sell an option, the premium received is your starting profit. If the option expires worthless, you keep it all.

• Max profit: Premium received x 100
• P&L: Premium received - current option value (x100)

Example: Sell a $105 call for $2.00. Stock stays at $102.

• The call expires worthless. P&L: $2.00 x 100 = $200 profit

If the stock goes to $110: the call is worth $5. P&L: ($2.00 - $5.00) x 100 = -$300 loss

Step 4: Vertical Spreads (Bull Call, Bear Put, etc.)

Debit spreads (you pay to enter):

• Max profit: (Strike width - net debit) x 100
• Max loss: Net debit x 100
• Breakeven: Long strike + net debit (for bull call) or long strike - net debit (for bear put)

Example: Bull call spread: buy $100 call for $4, sell $105 call for $2. Net debit = $2.

• Max profit: ($5 - $2) x 100 = $300
• Max loss: $2 x 100 = $200

Credit spreads (you collect to enter):

• Max profit: Net credit x 100
• Max loss: (Strike width - net credit) x 100
• Breakeven: Short strike - net credit (for bull put) or short strike + net credit (for bear call)

Example: Bull put spread: sell $95 put for $2, buy $90 put for $0.80. Net credit = $1.20.

• Max profit: $1.20 x 100 = $120
• Max loss: ($5 - $1.20) x 100 = $380

Step 5: Iron Condors

An iron condor is two credit spreads. Add the credits from both sides:

• Max profit: Total net credit x 100
• Max loss: (Wider spread width - total credit) x 100
• Breakeven: Short put - credit (downside) and short call + credit (upside)

Step 6: Straddles and Strangles

Long straddle/strangle:

• Total cost: Call premium + put premium
• Breakeven: Strike(s) +/- total premium
• P&L: Value of winning leg - total premium paid

Step 7: Account for Commissions

Most brokers charge $0.50-$0.65 per contract. On a 4-leg iron condor, that is $2-$2.60 to open and the same to close. Factor this into your P&L calculations, especially on small trades.

Quick P&L Cheat Sheet

Summary

Always calculate your max profit, max loss, and breakeven before entering any trade. Use the formulas above for each strategy type. Account for commissions on smaller trades. If you cannot quickly calculate these numbers, practice on paper until they become second nature.