Covered Call Return Calculator
A covered call strategy involves holding shares of stock and simultaneously selling a call option against those shares to collect premium income. The premium provides immediate income and a degree of downside protection. In exchange, the investor caps their upside at the strike price: if the stock rises above the strike, the shares are assigned (sold) at the strike and the investor misses any further gains. This calculator computes the maximum return (achieved if the stock is at or above the strike at expiration), the premium-only return (if the stock stays below the strike and the call expires worthless), and the annualized yield based on days to expiration. Enter the cost basis per share (your purchase price), the call option's strike price, the premium received per share, and the number of days until expiration.
Covered call return formula
Capped gain = max(0, strike - cost basis)
Max return = (premium + capped gain) / cost basis
Premium-only return = premium / cost basis
Annualized max return = (1 + max return)^(365/days) - 1
Breakeven = cost basis - premium
The maximum return is realized when the stock is at or above the strike at expiration and shares are called away. The premium-only return is realized when the stock stays below the strike and the call expires worthless.
Key covered call concepts
- Covered calls are income strategies: the primary goal is premium collection rather than stock appreciation.
- Selling calls at or near the current stock price (at-the-money) maximizes premium but limits upside gain.
- Out-of-the-money calls leave room for capital appreciation up to the strike before shares are called away.
- The strategy is suitable in flat to moderately bullish markets where large moves are not expected.
- Standard contracts cover 100 shares: multiply per-share figures by 100 for total dollar amounts.
Frequently asked questions
What is a covered call?
A covered call is an options strategy where an investor who owns shares sells a call option against those shares. The call premium is received immediately as income, but the shares may be called away (sold) at the strike price if the stock rises above the strike at expiration.
How is covered call return calculated?
Return = (premium received + capped capital gain) / cost basis. The capped capital gain is max(0, strike - cost basis). If the stock stays below the strike, the investor keeps the premium and the shares. If the stock rises above the strike, shares are sold at the strike.
What is the maximum return on a covered call?
The maximum return is (premium + strike - cost basis) / cost basis, achieved when the stock trades at or above the strike at expiration. Upside beyond the strike is forfeited because the shares are called away.
How is the annualized return calculated?
Annualized return = ((1 + return per period)^(365/days) - 1) * 100. This compounds the period return to an annual basis. Annualizing is important for comparing covered calls with different expiration periods.
What is the downside protection from a covered call?
The premium received provides a cushion against stock price declines. If the stock falls, the loss is reduced by the premium amount. The breakeven is cost basis minus premium. Below that level, losses accumulate dollar-for-dollar with the stock.
Official sources
- Options Clearing Corporation: theocc.com.
- CBOE Options Institute: cboe.com/education.
- SEC Investor Education: sec.gov/investor.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.