Covered Call Calculator: Profit, Return and Break-Even

Stock plus short call strategy

Covered Call Calculator

Calculate covered-call profit, premium income, break-even, maximum gain, downside risk and simple annualized return.

Formatting only; no exchange-rate conversion is performed.
Use the price paid when entering the covered-call position.
The stock may be assigned at this price when it finishes above strike.
Enter the credit received, not the quoted total for all contracts.
Whole contracts from 1 to 100,000.
US equity options normally represent 100 shares.
Scenario price used to calculate the strategy result.
Optional total opening and closing costs for the full position.
Used only for simple annualized premium and maximum-return estimates.

This models shares purchased at the entered price plus one short call for each covered block of shares. It assumes the option is held to expiration and ignores early assignment, dividends, taxes, margin interest and volatility changes.

Covered call profit formula

Shares covered = contracts × shares per contract

Short call P&L = [premium − max(expiration price − strike, 0)] × shares

Net strategy P&L = (expiration price − purchase price) × shares + short call P&L − fees

Break-even = purchase price − premium + fees ÷ shares

Maximum net profit = (strike − purchase price + premium) × shares − fees

Maximum loss = (purchase price − premium) × shares + fees

The upside becomes capped at the strike because gains on the shares above that price are offset by losses on the short call. The premium lowers break-even and cushions part of a stock decline, but the position still carries most of the downside risk of owning the shares.

Verified examples

Stock finishes below the strike

Buy 100 shares at $100, sell one $110 call for $3, pay $2 in total fees and use a $105 expiration price. The option expires worthless. Stock profit is $500, call profit is $300 and net strategy profit is $798. Break-even is $97.02.

Stock finishes above the strike

With the same position and a $120 expiration price, assignment caps net profit at $1,298. Maximum return on the $10,000 stock cost is 12.98%. The effective assigned sale price after premium and fees is $112.98 per share.

Stock declines

At a $90 expiration price, the stock loses $1,000, premium contributes $300 and the net covered-call loss is $702 after fees. The premium reduces the loss but does not eliminate downside exposure.

How to interpret covered call returns

  • Net premium yield divides premium after fees by the original stock cost.
  • Maximum return assumes the stock finishes at or above the strike and is assigned.
  • Simple annualized values multiply the period return by 365 ÷ days. They do not assume compounding or guarantee repeatable trades.
  • Return on stock cost uses the purchase price of the covered shares as its denominator.

Limits and assumptions

  • The calculator models a fully covered short call held to expiration. It does not model naked calls, cash-secured puts, spreads, rolling or poor man’s covered calls.
  • It assumes one call contract covers the entered number of shares and that every contract has the same strike, premium and expiration.
  • It excludes dividends, taxes, bid-ask spreads beyond the entered fees, margin interest, early exercise, early assignment and changes before expiration.
  • The premium cannot exceed the entered stock purchase price. This preserves a nonnegative modeled loss when the stock falls to zero.
  • Contracts and shares per contract must be whole numbers. Days are limited to 3,650 and monetary prices to 100,000,000.

Risk note: A covered call limits upside but retains substantial stock downside. The results are scenario estimates, not a recommendation or guarantee of execution, assignment or return.

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