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Covered Call Profit/Loss Calculator

Covered call profit or loss equals stock price minus stock basis plus premium received minus the maximum of stock price minus strike price or zero, times 100 shares times number of contracts.

Expiration scenarios

Solution

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Educational estimate only, not financial advice. Results exclude commissions, taxes, slippage, dividends, assignment risk, margin, and broker-specific rules. Verify before trading options.

Share:

Covered Call Formula

S

Stock price at expiration.

B

Stock cost basis per share.

K

Strike price of the short call.

P

Premium received per share.

  • Break-even price = stock cost basis - premium received.
  • Maximum P/L above the strike = strike - stock cost basis + premium, multiplied by shares.
  • Downside risk remains substantial because the long stock can still fall toward zero.

Worked Examples

Load one of these covered call examples to compare called-away, sideways, and downside cases.

INCOME TRADE

How much can a covered call earn if shares are called away?

An investor owns 100 shares at $52 and sells 1 covered call with a $57.50 strike for $1.80. The stock closes at $60 on expiration day.

  • Premium income = $1.80 × 100 = $180.
  • Stock gain up to assignment = ($57.50 - $52) × 100 = $550.
  • The short call offsets gains above $57.50, so the final P/L is $550 + $180 = $730.
  • Break-even = $52 - $1.80 = $50.20.

Result: the position earns $730.00 and is capped once the stock is above the $57.50 strike.

The investor gives up stock upside above the strike in exchange for premium income.

SIDEWAYS STOCK

What if the call expires worthless?

A trader owns 200 shares at $38 and sells 2 calls with a $42 strike for $1.25 each. The stock closes at $39.50 at expiration.

  • Premium income = $1.25 × 200 = $250.
  • Stock gain = ($39.50 - $38) × 200 = $300.
  • Short call obligation = $0 because the stock is below the $42 strike.
  • Net P/L = $300 + $250 = $550.

Result: the calls expire worthless and the covered call position shows a $550.00 profit.

The trader still owns the shares after expiration in this scenario, so future stock movement remains relevant.

DOWNSIDE TEST

How much protection does the premium provide?

An investor owns 100 shares at $80 and sells 1 covered call with an $85 strike for $2.75. The stock drops to $74 at expiration.

  • Premium income = $2.75 × 100 = $275.
  • Stock loss = ($74 - $80) × 100 = -$600.
  • Short call obligation = $0 because the call expires out of the money.
  • Net P/L = -$600 + $275 = -$325.

Result: the premium cushions the decline, but the position still loses $325.00.

Covered calls reduce downside by the premium amount only; they do not behave like full protection.

How It Works

A covered call combines long stock with a short call option written against those shares. The stock position creates upside and downside exposure, while the premium received from selling the call lowers the break-even price. At expiration, gains are capped above the strike because the short call offsets any additional stock upside beyond that level.

Example Problem

You own 100 shares at a $100 cost basis and sell 1 covered call with a $110 strike for a $4 premium. The stock closes at $112 on expiration day. What is the profit, break-even price, and maximum covered call outcome?

  1. Identify the known values: stock cost B = $100, call strike K = $110, premium P = $4, expiration stock price S = $112, and contracts N = 1.
  2. Write the covered call formula: P/L = (S - B) × 100 × N + P × 100 × N - max(S - K, 0) × 100 × N.
  3. Calculate premium income: $4 × 100 × 1 = $400.
  4. Calculate stock gain: ($112 - $100) × 100 = $1,200.
  5. Calculate short call obligation: max($112 - $110, 0) × 100 = $200.
  6. Combine the legs: $1,200 + $400 - $200 = $1,400 profit.
  7. Compute break-even: $100 - $4 = $96.

The same $1,400 maximum P/L applies for any expiration stock price at or above the $110 strike, before commissions and taxes.

Key Concepts

The stock cost basis is the reference price for measuring total position profit or loss. Premium received is collected up front and cushions downside by that amount per share. The strike price sets the assignment level and caps the upside during the option's life. If the stock finishes above the strike, the covered call payoff stops improving because each extra dollar of stock gain is offset by the short call.

Applications

  • Estimating income from selling calls against shares you already own.
  • Comparing different strikes by capped upside, break-even price, and downside cushion.
  • Planning an exit price where you would be willing to have shares called away.
  • Stress-testing how much downside remains after collecting option premium.

Common Mistakes

  • Counting premium as free income while ignoring that the call caps future stock upside.
  • Forgetting that one listed equity option contract usually represents 100 shares.
  • Using current stock price instead of cost basis when measuring total position P/L.
  • Assuming covered calls remove downside risk; the stock can still fall sharply.
  • Ignoring early assignment, dividends, commissions, taxes, and bid-ask spreads in live trades.

Frequently Asked Questions

What is a covered call?

A covered call is a long stock position paired with a short call option on the same shares. The option premium creates income and lowers break-even, but the short call caps upside above the strike price.

How do you calculate covered call profit at expiration?

Covered call P/L equals stock P/L plus premium received minus the short call's intrinsic value at expiration: (S - B) × 100 × contracts + premium × 100 × contracts - max(S - K, 0) × 100 × contracts.

What is the break-even price for a covered call?

Break-even equals stock cost basis minus premium received per share. If you own shares at $100 and sell a call for $4, the expiration break-even is $96 before commissions and taxes.

What is the maximum profit on a covered call?

If the strike is above your stock cost basis, maximum profit is strike price minus stock cost plus premium received, multiplied by shares controlled. The payoff is capped once the stock reaches the short call strike.

Can a covered call lose money?

Yes. The premium reduces downside, but it does not eliminate stock risk. If the stock falls below the break-even price, the combined covered call position has a loss.

What happens if the stock closes above the strike?

At expiration, a short call that is in the money is generally assigned, so the stock is effectively sold at the strike price. The calculator models that capped assignment outcome.

Should I use this calculator before expiration?

Use it for expiration payoff planning. Before expiration, option value also depends on time value, implied volatility, dividends, interest rates, and early assignment risk.

Reference:

Options Industry Council, covered call strategy guide, maximum gain/loss and break-even definitions. https://www.optionseducation.org/

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