How to Sell Covered Calls on Stocks You Own

Holding 100 shares of a stock and letting them sit can feel like leaving potential income on the table. Selling covered calls is one of the simplest options strategies to generate extra cash from shares you already own, but it comes with real trade-offs that trip people up.

Here is how I break down selling covered calls, how to pick strike prices and expiration dates, and what actually happens when your shares get called away.

Disclaimer: This post is for educational purposes only and is not individual financial advice. Options trading involves risk.

What Is a Covered Call?

A covered call means you sell someone else the right to buy 100 shares of stock you already own at a fixed price (the strike price) before a specific date (the expiration date).

Because one standard option contract equals 100 shares of stock, you need to own at least 100 shares for every contract you sell. That stock is your "cover." If the buyer decides to exercise the option, you deliver the shares you already have—you do not have to buy them on the open market at high prices.

When you sell the contract, the buyer pays you cash upfront called a premium. That money is yours to keep, regardless of where the stock price goes next. If you want to dive deeper into how options mechanics work at expiration, check out my guide on what happens when options expire.

Picking the Strike Price and Expiration

Choosing the right strike price and expiration date comes down to your primary goal: making steady cash or keeping your stock.

I usually look at out-of-the-money (OTM) strike prices—strikes that sit above the current market price of the stock. For example, if the stock is at $50, I might look at a $55 strike. A higher strike gives the stock room to grow before I get forced to sell, but it pays a smaller upfront premium.

For expiration dates, 30 to 45 days out is often considered a practical window. Time decay speeds up during this window, meaning the value of the option drops faster as expiration gets closer. That works in your favor as the option seller. You can learn more about balancing income and risk in my post on selling covered calls for income.

The Main Trade-Off: Capping Your Upside

The biggest downside of a covered call is not losing money when the stock drops—it is missing out when the stock skyrockets.

When you sell a covered call, you swap unlimited upside potential for a fixed upfront payment. If a stock you own at $50 suddenly shoots up to $80 because of great earnings, but you sold a $55 covered call, your profit is capped at $55 plus the premium you collected. You miss out on the jump from $55 to $80.

On the flip side, the premium offers only a small cushion if the stock drops. If a $50 stock falls to $35, collecting a $2.00 premium helps a little, but you still take the brunt of the stock loss. That is why covered calls work best when you expect the stock to trade sideways or rise slowly, or when you want to stay defensive in a frothy market.

A Hypothetical Example

Let's walk through a clearly labeled hypothetical example to see how the numbers play out:

• Hypothetical position: You own 100 shares of Example Corp (EXAM) purchased at $45 per share.
• Current stock price: EXAM is trading at $50.
• The trade: You sell one 30-day covered call with a $55 strike price for a $2.00 premium ($200 total, since 1 contract = 100 shares).

Here are the three ways this scenario can end at expiration:

1. The stock stays below $55 (e.g., finishes at $52): The option expires worthless. You keep your 100 shares and keep the $200 premium. You can now sell another covered call if you want.
2. The stock drops (e.g., finishes at $42): The option expires worthless. You keep the $200 premium, but your stock position lost value. Your net breakeven on the position is $48 ($50 price minus $2 premium).
3. The stock surges past $55 (e.g., finishes at $65): The option is exercised ("called away"). You sell your 100 shares at the $55 strike price. You make $1,000 in stock gains ($55 strike minus your $45 buy price) plus the $200 premium for a total profit of $1,200. However, you miss out on the extra $10 per share gain between $55 and $65.

What Happens When Your Stock Gets Called Away?

If the stock closes above your strike price at expiration, your shares will automatically be called away.

When this happens, your broker takes your 100 shares and sells them at the strike price. The cash lands in your account, along with the premium you already collected.

For many investors, getting called away is a win because they locked in a profit target they were happy with. But there are two things to keep in mind:

• Taxes: Selling the shares triggers a taxable event (capital gains or losses), which can affect your tax bill depending on your cost basis and holding period.
• FOMO: Watching a stock continue to rally after your shares get called away can be frustrating if you wanted to hold the stock long-term.

The Takeaway

Selling covered calls turns existing stock holdings into an income generator, but only if you are comfortable parting with your shares at the strike price. Always choose a strike price where you would actually be happy taking a profit, and remember that option premiums lower your cost basis slightly, but they do not eliminate downside stock risk.