April 28, 2026
by Brian Overby
If you own stocks and you're not writing covered calls against them, you're leaving money on the table every single month. That's not hyperbole. The covered call strategy is one of the few options plays where the risk comes from something you're already exposed to, and the premium you collect is pure additional return.
This guide covers how the covered call strategy works, how to set it up, what to expect in each scenario, and when it makes sense to keep running it.
Writing a covered call means selling someone else the right to buy a stock you already own at a specific price within a specific time frame. Because one option contract represents 100 shares, you need at least 100 shares of the underlying stock for every call contract you sell.
When you sell the call, you collect the premium immediately. That's yours regardless of what happens next. The "covered" part of the name refers to the fact that your obligation as a seller is backed by stock you already hold. If the call is exercised and someone wants to buy your shares at the strike price, you already own them. You're not scrambling to buy stock in the open market at whatever price it's trading.
This is what separates the covered call strategy from naked call selling, which carries substantially more risk. With covered calls, the risk is the same as when you bought the stock.
The setup is straightforward. There are three decisions to make before placing the trade:
Choose a stock you already own that has performed reasonably well and that you would be comfortable selling at the right price. Avoid using a stock you're highly bullish on long-term. If the call gets assigned and you have to sell, you don't want to spend the next year regretting it.
In most cases, sell an out-of-the-money call, meaning the strike price is above the current stock price. That way, the stock has room to appreciate before it gets called away. As a general starting point, a strike price around 5-10% above the current stock price offers upside participation and a meaningful premium.
The 30-45-day window is a common starting point. Theta decay accelerates in the final weeks before expiration, which benefits the seller. You want to be in the range where that decay is working hardest for you without tying up the position for too long.
Once the trade is on, there are three ways it can play out. Understanding each one before you enter is part of running the covered call strategy correctly.
If the stock falls before expiration, the call you sold will also drop in value. That's actually useful. You can buy the call back for less than you collected, close the position, and reassess. The premium you collected provides a small cushion against the stock's decline. It won't eliminate the loss, but it reduces it. This is one of the most underappreciated features of the covered call strategy: it provides a small offset against downside that straight stock ownership does not.
This is the ideal outcome for a covered call seller. The call expires worthless; you keep the entire premium and still own the stock. You can then sell another call against the same position and collect another premium. You can repeat this indefinitely on the same chunk of stock. Each cycle generates income. Each cycle also teaches you more about how options behave in practice.
If the stock rises past the strike price and the call is assigned, you sell your shares at the strike price. You keep the premium and any gains on the stock up to the strike. What you give up is any appreciation above the strike.
This is the trade-off at the heart of the covered call strategy: you cap your upside in exchange for the premium you collected. If you deliberately chose the strike price and were comfortable selling at that level, this is not a bad outcome. You made the maximum profit the position could generate. The right response is to find the next trade, not to regret the one that worked.
The covered call strategy is built around time decay. When you sell a call, you're selling time value. Every day that passes without the stock reaching the strike price, that time value erodes, and that erosion benefits you as the seller.
This is why the option greeks matter for anyone running this strategy. Theta is the rate at which an option's value declines over time. For a covered call seller, theta is working in your favor from the moment you execute the trade. The position doesn't require the stock to do anything to generate that return. It just requires time to pass.
Understanding how theta accelerates in the final 30 days before expiration is part of why the 30-45 day window is commonly used. You're entering the range where decay is most efficient without holding through too much uncertainty.
Running the covered call strategy well means monitoring a few things between entry and expiration.
A good rule of thumb on premium: look for around 2% of stock value as an acceptable starting point. If the premium seems unusually high for a given strike and expiration, there's usually a reason, often an upcoming earnings release or other event that the market is pricing in. High premiums are not always a gift.
Dividend dates: If the stock pays a dividend, be aware of the ex-dividend date while a covered call is open. Call buyers may exercise early to capture the dividend, which could result in early assignment before expiration. This is covered in more detail on the early exercise and assignment page.
When to close early: If the call you sold has decayed to 20% or less of what you collected, closing the position and locking in the gain is often the better move. The remaining potential profit is small relative to the event risk of staying in the trade.
Most beginning options traders start by buying calls or puts, which means they have to fight time decay from day one. The covered call strategy puts you on the other side of that equation. You're collecting premium while time is on your side. The risk profile is familiar because you already own the stock.
The Rookie’s Corner on the site focuses on covered calls and cash-secured puts as the two foundational option-selling strategies for traders who are just getting started. Both strategies generate income, both put theta on your side, and both give you a concrete way to experience how options behave before moving into more complex plays.
If you own a diversified stock portfolio and you've never sold a covered call against any of those positions, the covered call strategy is a reasonable next step to consider.
