Options
Covered Calls Explained: Income, Trade-Offs and Assignment
A covered call is one of the most popular options strategies among long-term investors. It trades some of your upside for income today. Whether that's a good trade depends on what happens next.
What a covered call is
You own at least 100 shares of a stock and sell one call option against them. The buyer pays you a premium for the right to buy your shares at the strike price before expiration. It's "covered" because you already own the shares you might have to deliver.
A worked example
You own 100 shares of XYZ, bought at $100. You sell one call with a $105 strike expiring in 45 days for $2.00, collecting $200.
| XYZ at expiration | What happens | Result vs. $100 purchase |
|---|---|---|
| $95 | Call expires worthless. You keep shares and premium. | −$500 on stock + $200 = −$300 |
| $100 | Call expires worthless. | +$200 |
| $105 | At the strike; typically not exercised. | +$500 + $200 = +$700 |
| $120 | Call is exercised. You sell at $105. | +$500 + $200 = +$700 (you miss the rise to $120) |
Maximum profit = (strike − purchase price + premium) × 100 = $700
Breakeven = purchase price − premium = $98
The trade-off in one sentence
You get paid now, in exchange for giving up gains above the strike. If the stock drifts sideways or rises modestly, covered calls add income. If it soars, you sold your upside cheaply. If it collapses, the premium only softens the blow.
Assignment
If the call is exercised, you're assigned: your broker sells your 100 shares at the strike. Most U.S. stock options are American-style, so this can happen before expiration, though it's more common near expiration or just before an ex-dividend date when the call is deep in the money (the call owner may exercise to capture the dividend).
Assignment can create a taxable sale. If you've held the shares a long time with a large gain, an unexpected assignment can trigger a tax bill you didn't plan for.
Choosing a strike and expiration
- Closer strike → more premium, less upside, higher chance of assignment.
- Farther strike → less premium, more upside, lower chance of assignment.
- Shorter expiration → less premium per trade but more frequent decisions; time decay is fastest near expiration.
Ask yourself before each trade: would I be happy selling my shares at this strike? If not, don't sell the call.
Risks people underestimate
- The premium doesn't protect against big drops.
- Selling calls on a stock you'd hate to lose leads to buying back calls at a loss.
- Commissions, fees and taxes eat into small premiums.
- Selling calls without owning the stock (naked calls) carries potentially unlimited risk. That is not a covered call.
Model it before you place it:
Options payoff calculatorSee profit and loss at expiration for a long call, long put or covered call.
Common questions
Can you lose money on a covered call?
Yes. A covered call does not protect you from a large drop in the stock. The premium only offsets part of the loss. Your maximum loss is the stock's purchase price minus the premium received.
What happens if my covered call is assigned?
You sell your 100 shares at the strike price. You keep the premium. If the stock is far above the strike, you miss the gain above it.
When is early assignment more likely?
Early assignment can happen any time with American-style options, but it becomes more likely when a call is deep in the money, especially just before the stock's ex-dividend date.