What is a covered call and how does it work?
A covered call has two parts: 100 shares you own and one short call on the same stock. The call is covered because, if you are assigned, you deliver shares you already hold instead of buying them in the market. One standard US equity option covers 100 shares, so 300 shares can cover three calls, while 150 shares cover only one.
When you sell the call, the premium lands in your account at once. Then one of three things happens. The call expires out of the money, and you keep the premium and the shares. You buy the call back before expiration, for a gain or a loss on the option. Or the call is exercised and you are assigned: your 100 shares are sold at the strike, and you still keep the premium.
Brokers usually allow covered calls at one of their lowest options approval levels, because the shares cover the obligation. That does not make the position low-risk; the risk is the stock itself. The four basic positions are compared in call vs put, and the wider set of strategies in our options strategies map.
- Covered call
- A position of at least 100 shares plus one short call per 100 shares on the same stock. The seller collects the premium and must sell the shares at the strike if assigned.
- Assignment
- The notice that an option you sold has been exercised. For a covered call, it means your shares are sold at the strike price.
- Called away
- What traders say when assignment on a covered call sells their shares at the strike.
Covered call example: max profit, breakeven and max loss (hypothetical)
You buy 100 shares of XYZ at $50, a $5,000 position. You sell one $55 call that expires in 45 days for $1.00 and collect $100. The numbers are hypothetical, in the range a standard pricing model gives with implied volatility near 37%.
Three formulas, per share and then times 100. Maximum profit = (strike − stock cost) + premium = ($55 − $50) + $1.00 = $6.00, or $600, reached at $55 or higher. Breakeven = stock cost − premium = $49.00. Maximum loss = stock cost − premium = $49.00 a share, or $4,900, if XYZ goes to zero: the premium is the only cushion. Here is the result at expiration at four prices:
- XYZ at $44: the shares lose $600, the call expires worthless and you keep $100. A $500 loss, against $600 for the stock alone.
- XYZ at $50: the shares are flat and you keep $100. A $100 gain.
- XYZ at $53: the shares gain $300 and you keep $100. A $400 gain, and you still own the shares.
- XYZ at $60: your shares are called away at $55. A $600 gain, while the stock alone would have made $1,000: you gave up $400 of upside.
How to choose the strike price for a covered call
The strike sets the trade-off between premium and upside. A strike close to the stock price pays more premium and caps the gain sooner; a strike further out of the money pays less and leaves more room for the stock to rise before your shares are called away. Only choose a strike at which you would genuinely be content to sell.
Delta is a useful rough guide. It is often read as a model-based estimate of the chance that the call finishes in the money, which for a covered call is roughly the chance that your shares are called away. Treat it as an estimate that changes every day, not a forecast; our options Greeks guide explains why. Same hypothetical XYZ at $50, 45 days, rounded model values:
- $50 call (at the money): about $2.70, delta about 0.54. Maximum profit $270, breakeven $47.30, no gain from the shares above $50.
- $52.50 call: about $1.70, delta about 0.39. Maximum profit $420, breakeven $48.30.
- $55 call: about $1.00, delta about 0.26. Maximum profit $600, breakeven $49.00.
Which expiration should you sell?
Time works for the call seller. The call’s time value shrinks every day, and faster in the last few weeks, as the drawing shows. Shorter expirations collect less premium per trade but decay faster; longer ones pay more up front but hold your shares under the cap for longer. Many covered call writers use about 30 to 45 days and decide again at each expiration. That is a habit, not a rule. Strike and expiration trade-offs are covered in depth in how to choose a strike price.
Check the calendar before you sell. Earnings inside the expiration add gap risk in both directions, and the premium usually prices it in through higher implied volatility, as our implied volatility guide explains. An ex-dividend date inside the expiration raises the chance of early assignment, explained next.
Covered call assignment and early assignment before ex-dividend
Options on US stocks are American-style, so the call buyer can exercise on any business day, not only at expiration. When that happens, the Options Clearing Corporation (OCC) assigns the exercise to a broker at random, and the broker allocates it to a customer who is short that call, by a random or first-in, first-out method. You find out afterwards: your 100 shares are gone, and you have the strike times 100 in cash plus the premium you kept from the start.
Early exercise is uncommon while a call still has meaningful time value, because the holder would throw that value away; selling the call is usually better for them. The common exception is a dividend. To collect it, the holder must own the shares before the ex-dividend date, so an in-the-money call whose remaining time value is smaller than the dividend may be exercised on the last business day before that date. Hypothetical: XYZ has climbed to $60 and goes ex-dividend tomorrow with a $0.50 dividend, and your $55 call trades at $5.20, only $0.20 above its $5 intrinsic value. Exercising captures $0.50 and gives up $0.20, so assignment is likely, and you would not receive that dividend.
At expiration, a call that finishes in the money by $0.01 or more is normally exercised automatically. If you want to keep the shares, buy the call back before then, which usually costs more than you collected if the stock has climbed past the strike. Expiration-day mechanics are covered in options expiration.
How to roll a covered call
Rolling means buying back the call you sold and selling another in the same order, usually with a later expiration (rolling out), a higher strike (rolling up), or both. Traders roll to avoid assignment when the stock has risen past the strike, or to sell a new call when the old one is nearly worthless.
Hypothetical: XYZ climbs to $56 with 10 days left on your $55 call, which now costs about $1.95 to buy back. A 45-day $57.50 call brings about $2.35. The roll is a net credit of about $0.40 a share, or $40. You keep the shares and lift the cap from $55 to $57.50, and in exchange you carry the stock risk for another 45 days. If XYZ keeps climbing, you face the same choice again, usually at a higher price.
Rolling does not erase a loss on the option; it closes one trade and opens another. Rolling down to a lower strike after the stock falls collects more premium, but if you are later assigned it can lock in a sale price below what you paid for the shares. Decide in advance at what price you would rather let the shares go.
When covered calls go wrong
A covered call is not a hedge. The premium gives a small cushion, not protection; buying a put is the tool for protection. Both weak spots come from the stock, not the option:
- A sharp drop. If XYZ falls from $50 to $38 after an earnings miss, you lose $1,200 on the shares and keep $100: a $1,100 loss, close to owning the stock alone. Selling more calls afterwards lowers your breakeven only slowly.
- A sharp rally. If XYZ jumps to $70 on takeover news, your shares are called away at $55 and your gain stops at $600, while the stock alone would have gained $2,000.
- Selling calls on a stock you no longer want to own, just for the premium, keeps you exposed to the very drop you are worried about.
- Strikes below your cost. A call struck below what you paid for the shares locks in a loss on them if you are assigned.
Covered call vs cash-secured put, and the wheel
A covered call and a cash-secured put on the same stock, strike and expiration have nearly the same payoff shape at expiration: a capped gain above the strike and stock-like losses below it. The difference is the starting point. The covered call starts from shares you own; the cash-secured put starts from cash, with an obligation to buy shares at the strike.
Traders who alternate the two run what is called the wheel: sell cash-secured puts until assigned, sell covered calls on the shares until they are called away, then start again. It collects premium at each step and does not remove the stock risk at any of them.