Covered Call Calculator

Analyze the risk and reward of selling call options against stock you own.

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Why Sell Covered Calls?

Selling a covered call (writing an option) allows you to generate immediate income from your existing stock portfolio. In exchange for this income (premium), you agree to sell your stock if it rises above the Strike Price.

The Trade-Off

  • Pros:You get cash upfront. You lower your break-even price. You profit even if the stock stays flat.
  • Cons:Your upside is capped. If the stock moons to $200, you have to sell at your Strike (e.g., $110).

Calculations

Break-Even = Purchase Price - Premium

Max Profit = (Strike - Purchase) + Premium

When to use it?

  • Neutral / Slightly BullishYou think the stock usually stays flat or goes up slowly. Selling calls exploits this lack of movement.
  • Income SeekingDividends yield 3% per year. Selling calls can yield 1-2% per month, significantly boosting cash flow.

Outcome Scenarios

Stock tanks

You still lose money, but you lose less than buy-and-hold because the premium cushions the fall.

Stock skyrockets

You make max profit, but you miss out on the "super gains." You are forced to sell at the Strike Price.

Max Profit Formula

Your maximum profit is capped at the strike price plus the premium received. If the stock goes above the strike price, you don't make any additional money because you must sell your shares at the strike.

StrikeThe price at which you agree to sell your shares
Purchase\;PriceThe price you originally paid for the stock
PremiumThe cash you received upfront for selling the call option

Manual Step: Calculating Break-Even and Max Profit

You buy 100 shares of XYZ stock at $50 per share. You sell a covered call with a $55 strike price and receive a $2.00 premium per share.

1
1. Calculate Break-Even
Subtract the premium from your purchase price. Your new break-even is $48.
2
2. Calculate Capital Gain (if called)
If the stock reaches $55+, you sell at $55 for a $5 profit per share.
3
3. Calculate Max Profit
Add your capital gain to your premium. Your max profit is $7 per share ($700 total).
4
Result
You are protected down to $48, but your upside is capped at a $700 total profit.

Frequently Asked Questions

What happens if I get assigned?
If the stock is above the Strike Price at expiration, your shares will be sold automatically at the Strike Price. You keep the cash proceeds plus the initial premium you collected.
Is selling covered calls risk-free?
No. You still own the stock, which carries downside risk. If the company goes bankrupt, you lose your investment, minus the small premium you collected. Your upside is also capped.
How many shares do I need?
Standard options contracts represent 100 shares of the underlying stock. Therefore, you need to own at least 100 shares (or multiples of 100) to sell covered calls.
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Frequently Asked Questions

How accurate is the Covered Call?
The calculator applies the displayed formula to the values you enter. Rounding and assumptions can affect the result, so verify it against an authoritative source before using it for an official or legal purpose.
Is my data stored or tracked?
No. This tool processes all mathematical operations strictly within your local browser environment. No personal data or inputs are transmitted to or stored on our servers.
How frequently is this tool updated?
All mathematical logic, constants, and tax brackets are audited annually to ensure compliance with the latest 2026 global standards.

Sources & Citations

  • Standard Mathematical AlgorithmsIEEE Computation Standards
  • Data Integrity & Local Processing GuidelinesW3C
  • General Mathematical VerificationNational Institute of Standards and Technology (NIST)

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