How to Choose a Covered Call Strike Price and Expiration
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Compare covered call strikes and expirations by premium, maximum profit, break-even and chance of assignment, and pick the one that fits your view of the shares.
Choosing a covered call strike and expiration means setting two things: the price at which you agree to sell your shares, and how long you agree to that. Start the strike at the lowest price at which you would be content to sell, and pick the expiration by how long you are willing to commit the shares. A strike close to the stock price pays more premium and cushions more of a fall but caps your gain sooner, and a longer expiration pays more in total but ties up the shares for longer.
This lesson compares the choices on the 100 XYZ shares from What Is a Covered Call?, bought at $48. The examples show a way to compare contracts, not a recommendation to trade any of them.
The premiums here are model values from the Black-Scholes model the free profit calculator uses, at 38.6% implied volatility and a 4.5% interest rate, with no dividends. That is the volatility at which the 52 call is worth the $0.80 used throughout this module. Real quotes have a bid and an ask, and a seller usually fills nearer the bid.
How do you choose a covered call strike price?
With XYZ at $48, here are four calls expiring in 30 days. "Static return" is the premium as a share of the $4,800 the stock cost; "if called" adds the stock gain up to the strike.
Read down the table and the trade-off is plain:
- A lower strike pays more now. The 48 call collects $220, almost seven times the 55 call's $32, and lowers the break-even to $45.80.
- A higher strike pays more later, if the stock rises. The 55 call can make $732 if XYZ climbs past $55, but cushions a fall by only $0.32 a share.
- Every strike leaves the downside. Even the 48 call's break-even is only $2.20 below the purchase price. Below it, each strike loses $100 for every dollar the stock falls.
Four covered call strikes on the same 100 shares, 30 days out
Sell the 48 call
Collect $220
Max gain $220, break-even $45.80
Sell the 50 call
Collect $137
Max gain $337, break-even $46.63
Sell the 52 call
Collect $80
Max gain $480, break-even $47.20
Sell the 55 call
Collect $32
Max gain $732, break-even $47.68
Gray line: zero, where the position breaks even. Dashed line: strike. Each sketch shows profit or loss at expiration as the stock price rises from left to right.
The last column is the model's estimate of the chance the stock finishes above the strike, which is roughly the chance your shares are called away at expiration. Many chains do not show it, so traders often use delta instead: the 52 call's delta is about 0.26, close to its 23% model chance. The Options Industry Council notes that some traders read delta this way, and that delta shifts as the stock price and the time to expiration change. Treat either figure as an estimate, not a forecast.
In the money, at the money or out of the money?
- Out of the money (strike above the stock price, like 52 and 55): you keep some upside and are less likely to be assigned. This is the usual choice for shares you want to keep.
- At the money (strike near the stock price, like 48): the most time value, and roughly even odds of assignment. The premium is the main return.
- In the money (strike below the stock price): the most premium and the lowest break-even, but much of the premium is intrinsic value you would have had by selling the shares, and they will probably be called away.
One firm rule applies to any strike: choose one you would be content to sell at. If you would be upset to sell XYZ at $50, do not sell the 50 call because its premium looks good.
How do you choose a covered call expiration?
Now hold the strike at 52 and change the expiration.
The XYZ 52 call at three expirations, with XYZ at $48
Premium collected, per contract
Time decay today, per contract per day
A longer expiration pays more in total: twice the time brings in about twice the premium here, $163 against $80. But the 30-day call is decaying faster today, $3.03 a day against $2.51. The model's time decay is what the call loses in a day with nothing else changing, the part of the premium a seller earns by waiting. Shorter calls earn it faster, which is one reason many covered call writers sell about a month out and repeat.
The other side of that choice:
- Shorter expirations mean more decisions, more orders and more commissions, and a call that is more sensitive to each move in the stock as expiration nears.
- Longer expirations commit the shares for longer. If XYZ rallies in week two of a 60-day call, you wait or pay to buy the call back.
- Events inside the window matter. An upcoming earnings report usually lifts implied volatility and the premium, but also the chance of a large move. A dividend raises the risk of early assignment, covered in What Happens When a Covered Call Is Assigned?.
Worked example
Turning a view into a covered call
You own 100 XYZ at $48 and your view is: "XYZ drifts higher over the next month, and I would happily sell it at $52."
- Strike: 52, the price you would sell at anyway. The 50 call pays more, but you are not content to sell at $50.
- Expiration: 30 days. It matches the time frame of your view and lets you reassess in a month.
- What you collect: $0.80, or $80.
- The plan written down: maximum profit $480 if called away at $52, break-even $47.20, and a worst case of a $4,720 loss if XYZ goes to zero.
Figures are at expiration and before commissions and fees.
Illustrative and hypothetical. The ticker and prices are invented for teaching, and the figures exclude commissions, fees, margin interest and taxes, which reduce real results. Past or hypothetical outcomes do not indicate future results.
Check your understanding
From the strike table, which call lowers the break-even the most, and what does it give up?
Show answer
The 48 call, which lowers the break-even to $45.80. It gives up all of the stock's upside: the most it can make is the $220 premium, and it has about even odds of being assigned.
The 60-day 52 call pays about twice as much as the 30-day call. Why might a seller still choose the 30-day call?
Show answer
The 30-day call is decaying faster today ($3.03 a day against $2.51 on the model), it commits the shares for half as long, and it lets the seller reassess the strike and the stock after a month instead of two.
Delta on a covered call strike is 0.25. What can you reasonably say about assignment?
Show answer
As a rough estimate, about a one-in-four chance the call finishes in the money and the shares are called away at expiration. It is a model figure that changes as the stock and time move, not a probability you can rely on.
Key takeaways
- Start with the lowest price you would be content to sell at, and look at strikes at or above it.
- Lower strikes pay more and lower the break-even; higher strikes pay less and leave more upside.
- Longer expirations pay more in total but decay more slowly today, and commit the shares for longer.
- Delta is a rough, changing estimate of the chance of assignment, not a forecast.
Common questions
What is the best strike price for a covered call?
There is no single best strike. A strike near the current price pays the most premium and cushions the most, but is the most likely to be assigned. A strike further above the price pays less but leaves more room for the shares to rise. Pick the lowest price at which you would be content to sell.
Should I sell covered calls in the money or out of the money?
Out-of-the-money calls keep some upside and are less likely to be assigned, so they suit shares you want to keep. In-the-money calls pay more and lower your break-even further, but most of their premium is intrinsic value and the shares will probably be called away.
How far out should I sell a covered call?
Some traders sell calls 30 to 45 days out, but it is a trade-off rather than a rule. A longer expiration pays more in total and needs fewer decisions, but commits the shares for longer. A shorter one decays faster day by day in this lesson's example and lets you adjust sooner.
What delta should I use for covered calls?
Some traders use delta as a rough guide to the chance a call finishes in the money, and choose a range such as 0.20 to 0.30. It is only an estimate from a pricing model, and it changes as the stock moves and time passes.