Own 100 shares, sell one call against them, and trade the tail of the upside for premium today.
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P&L at the selected date, priced with Black–Scholes. At 0 DTE the curve is pure intrinsic value. A tool, not a recommendation.
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What a Covered Call is
Structure: Long 100 shares + short 1 call, same expiry. The call is usually written out-of-the-money.
A covered call is a stock position with a short call written against it. You keep the shares, you collect the premium, and you agree to sell at the strike if the stock closes above it. The tool draws the whole position: the rising stock line, the flat cap once the call goes in-the-money, and the credit that shifts the whole curve up.
The trade exists to price one decision: how much of the upside you are willing to give up for cash today. Everything else — the breakeven, the capped gain, the downside cushion — falls out of where you write the call.
The numbers
Max profit
(call strike − share entry price) + premium received, per 100 shares — reached at or above the strike
Max loss
share entry price − premium received, if the stock goes to zero
Breakeven
share entry price − premium received
These are at-expiration formulas. The chart above prices the structure at the selected date with Black–Scholes — at 0 DTE the curve is pure intrinsic value. A tool, not a recommendation.
When traders use it
You own the shares already and have no strong reason to expect a fast move above the strike.
You would be genuinely willing to sell at the strike, not just saying so.
You want the premium to lower the effective cost basis while it is held.
What works against it
Upside is capped: everything above the strike belongs to the call buyer.
Assignment can take the shares away. Early assignment is possible around ex-dividend dates and deep in-the-money calls.
It is still a stock position — the premium is a cushion, not protection.
Covered Call questions
What is the breakeven on a covered call?
Share entry price minus the premium you received. If you paid $50 for the stock and collected $1.50, the position breaks even at $48.50, ignoring commissions and the fact that you had to fund the shares.
Why is the max gain not the whole move in the stock?
Because you sold the call. Above the strike you deliver the shares at that price, so your gain is the difference between entry and the strike plus the premium — no matter how far the stock runs.
How does the tool handle the stock leg?
The covered call preset includes the 100-share leg, so the payoff curve is the real position. If you want the option leg alone, use the Short Call preset instead.
Does a covered call stop the loss if the stock falls?
No. The premium lowers your breakeven and adds a cushion the size of the credit. Below that, the loss is the stock loss minus the premium.
If it goes against you: common mitigations
Every entry below is a response traders commonly plan before entry, with what it actually costs. Which one is right depends on why you entered and what you now expect — that is a judgement the calculator cannot make for you, and none of this is advice.
Roll up and out
Buy back the call you sold and sell a later-dated call at a higher strike, ideally for a credit.
Pros: Keeps the shares, resets the upside cap higher, and can bring in additional credit.
Cons: The buyback can cost more than the original credit, especially after a fast rally, and it extends how long the shares are committed.
Consider when: The stock moved up modestly, you still want to hold the shares, and a higher strike is available further out.
Roll out at the same strike
Buy back the near call and sell the same strike in a later expiry.
Pros: Delays assignment without moving your exit price; often a small net credit or debit.
Cons: You stay capped at the same strike for longer, and a stock that keeps climbing makes the next roll more expensive.
Consider when: Your exit price is unchanged but you want more time before the shares can be called away.
Let it be assigned
Do nothing and deliver the shares at the strike if the call finishes in the money.
Pros: A clean exit at the price you chose when you wrote the call, with the full premium kept.
Cons: You give up everything above the strike, and the stock sale may land in a different tax period than you intended.
Consider when: The strike is close to the price you would sell at anyway, and the position has done its job.
Close the whole position
Buy back the call and sell the shares at the same time.
Pros: Ends the exposure immediately and frees the capital in one step.
Cons: You may sell the shares below where you wanted, and the call buyback can be expensive if the stock is deep in the money.
Consider when: Your reason for holding the shares has changed instead of the option price.