Covered Call Calculator (US)
This covered call calculator works out max profit, breakeven, premium income, and static and if-called returns, plus the annualized return.
What it does
The Covered Call Calculator estimates the profit, breakeven, and returns of a covered call: owning shares and selling a call option against them for a premium.
Data sources & parameters
This calculator uses standard financial formulas and runs entirely in your browser. It needs no external rate data — your result is computed only from the values you enter above.
We always strive to use the latest data for every variable so our results and reports are as accurate as possible. Even so, errors are possible — you should not rely on this tool or its report alone, and we accept no liability for any decision made based on it.
The formula
Max profit = (strike − cost basis + premium) × 100; breakeven = cost basis − premium
How it works
It applies standard options math on a 100-share contract to find max profit if the stock is called away, your breakeven, and the static and if-called returns.
Where it is used
- Evaluating a covered call before you sell it
- Comparing static and if-called returns across strikes
- Estimating the annualized yield of an option position
Worked example
Owning shares at $50.00 and selling the $55.00 call for $2.00 yields … of premium, a breakeven of …, and a … return if the stock is called away.
What the covered call calculator does
The covered call calculator works out the numbers behind a common options strategy for stock investors: you own shares and sell a call option against them to collect a premium. Enter your share cost basis, the call strike and the premium, and it returns the maximum profit, breakeven price, premium income and the returns under different outcomes.
It applies the standard 100-share contract multiplier for US equity options and reports results per position, so you can compare strikes and expirations before you trade.
How a covered call works
A covered call combines a long stock position with a short call. Owning the shares is what makes the call covered rather than naked. You sell someone the right to buy your shares at the strike price before expiration, and you receive the premium up front, which you keep whatever happens.
If the stock finishes below the strike, the call expires worthless, you keep the shares and the premium, and you can sell another call. If it finishes at or above the strike, your shares are called away at the strike and your profit is capped. You give up gains above the strike in exchange for income and a small cushion against a decline.
The key numbers
- Max profit: the most you can make, when the stock is called away at the strike. It equals the strike minus your cost basis plus the premium, times the number of shares.
- Breakeven: cost basis minus the premium received, the stock price at which you neither gain nor lose.
- Premium income: the per-share premium times the number of shares.
- Static return: the return if the stock is unchanged at expiration and the option expires worthless, measured against your cost basis.
- If-called return: the return if the stock reaches the strike and your shares are sold, including the premium and any gain up to the strike.
- Annualized return: the if-called return scaled to a full year using the days to expiration, for comparing positions of different lengths.
- Downside protection: the premium as a percentage of your cost basis, how far the stock can fall before the position loses money.
How the calculation works
- It multiplies the number of contracts by 100 to get the total shares.
- It computes max profit as the strike minus cost basis plus premium, times shares.
- It sets breakeven at cost basis minus premium.
- It expresses the static and if-called outcomes as percentage returns on your cost basis.
- It annualizes the if-called return over the days to expiration, using a 365-day year.
The 100-share multiplier and 365-day year are market conventions, so the tool uses no tax or rate parameters and you can reproduce the results by hand.
What you need to enter
- Your share cost basis, the price at which you acquired the stock.
- The strike price of the call you plan to sell.
- The premium you can collect per share.
- Optionally, the number of contracts and the days to expiration.
A strike above your cost basis leaves room for a capital gain if the shares are called away, while a strike near the current price pays more premium but caps the upside sooner. Try several strikes to see the trade-off.
Reading your result
The if-called return is your best case, and the static return is what you earn if the stock holds steady; comparing them shows whether the premium is worth the capped upside. The annualized return helps compare a 30-day call with a 60-day call, since a higher return over a longer period is not always better per year. Downside protection only cushions a modest decline, not a large drop.
Risks to consider
A covered call is often described as conservative and income-oriented, and it does reduce the volatility of a stock position, but it has real risks. Your upside is capped at the strike, so a strong rally leaves gains behind. The premium only partly offsets a decline, so a sharp fall still produces a loss. Shares called away can trigger a taxable sale, and the tax treatment of options and assignments can be complex.
The calculator shows pre-tax profit and return and does not model taxes, commissions or early assignment. Premiums move constantly, so recalculate with current prices, and consult a licensed professional before trading options.
This is general information only and not investment advice.
About This Covered Call Calculator
Use this covered call calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.
Frequently asked questions
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