Covered Call Calculator
A covered call is one of the most popular and conservative options strategies. When you own 100 shares of a stock and sell (write) a call option against those shares, you receive an immediate cash premium from the option buyer. In exchange, you agree to sell your shares at the strike price if the option is exercised. This strategy generates income in flat or slowly rising markets and provides modest downside protection equal to the premium received. This calculator helps you evaluate any covered call trade by showing maximum profit, break-even price, annualised return on investment, and the effective stock sale price if assigned. Enter the details of your stock position and the call option you are considering selling.
Covered call formulas
Max Profit = (Strike - Stock Price + Premium) x 100 x Contracts
Break-Even = Stock Price - Premium
Return if Called = (Strike - Stock Price + Premium) / Stock Price
Annualised Return = Return if Called x (365 / Days to Expiration)
Key covered call metrics
- The premium received immediately reduces your effective cost basis in the stock.
- Break-even is lower than the stock purchase price by the amount of premium received.
- Maximum return is capped at the strike price plus premium (upside is limited).
- If the stock falls significantly below break-even, the covered call does not fully protect against loss.
- Rolling the call (buying back the expiring option and selling a new one) can extend income generation.
Covered calls: frequently asked questions
What is a covered call?
A covered call is an options strategy where you own at least 100 shares of a stock (the 'cover') and sell a call option against those shares. You receive the option premium immediately. If the stock stays below the strike price at expiration, the option expires worthless and you keep the premium. If the stock rises above the strike, your shares may be called away at the strike price.
What is the maximum profit on a covered call?
Maximum profit = (Strike Price - Purchase Price + Premium) x 100 x Contracts. This is achieved when the stock price is at or above the strike at expiration and the shares are called away at the strike price. You keep the premium regardless.
What is the downside protection from a covered call?
The premium received provides a small buffer against stock price declines. If you paid $50 for the stock and received $2 in premium, your effective cost basis is $48. You lose money only if the stock falls below $48. The premium cannot protect against large stock declines.
When is a covered call strategy most appropriate?
Covered calls work best when you have a neutral to mildly bullish outlook on the stock and are comfortable selling shares at the strike price. They are commonly used by income-focused investors who already own shares and want to generate additional cash flow without selling their position outright.
What happens if the stock rises far above the strike?
You give up the upside above the strike price. If you own shares at $50, sold a $55 call for $2, and the stock rises to $70, you still only receive $55 per share (plus the $2 premium). You miss the gain from $57 to $70. This opportunity cost is the main risk of covered calls in strongly rising markets.
Official sources
- OCC (Options Clearing Corporation): Covered Calls Education.
- CBOE: Options Strategy Guides.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.