The strike price you choose when selling a covered call is one of the most important decisions in the strategy. It directly determines how much premium you collect, how much upside you retain on the stock, and the probability that your shares get called away. In this guide, we'll walk through the key factors that should drive your strike selection and show you how different choices lead to different outcomes.

What Does Strike Price Mean for Covered Calls?

When you sell a covered call, the strike price is the price at which you agree to sell your shares if the option buyer exercises the contract. If the stock finishes above the strike at expiration, your shares will likely be called away at that price. If the stock stays below the strike, the option expires worthless, you keep your shares, and the premium is pure profit.

Strike prices are categorized relative to the current stock price: in-the-money (ITM) strikes are below the current price, at-the-money (ATM) strikes are at or very near the current price, and out-of-the-money (OTM) strikes are above the current price. Each category offers a different balance of risk and reward.

The Core Trade-Off: Premium vs. Upside

Selecting a strike price always involves a trade-off between the amount of premium you collect and the amount of stock appreciation you keep. Understanding this trade-off is essential:

ITM / ATM strikes (lower strike prices): These pay higher premiums because they have more intrinsic value and a greater probability of finishing in-the-money. However, you sacrifice upside potential since the stock only needs a small move (or none at all) before your shares get called away. ITM calls also provide more downside protection because the larger premium received creates a bigger buffer against stock price declines.

OTM strikes (higher strike prices): These pay less premium because the stock must rise to reach the strike before the option has any intrinsic value. The advantage is that you retain more room for capital appreciation. If the stock rallies but stays below the strike, you profit from both the premium and the stock gain.

Using Delta as a Probability Guide

Delta is one of the option Greeks, and it serves double duty for covered call sellers. It measures how much an option's price changes for a $1 move in the underlying stock, but it also serves as a rough estimate of the probability that the option will expire in-the-money.

Delta of 0.50 (ATM): Roughly a 50% chance the option expires ITM. These strikes offer the most balanced trade-off between premium and upside.

Delta of 0.30 (OTM): Roughly a 30% chance the option expires ITM, meaning about a 70% probability your shares are not called away. This is a popular choice for covered call sellers who want to keep their shares most of the time while still collecting meaningful premium.

Delta of 0.15 (far OTM): Only about a 15% chance of assignment. Premium is smaller, but you retain nearly all your upside in most scenarios.

Delta of 0.70 (ITM): About a 70% chance of assignment. High premium collected, but your shares will likely be called away. Best used when you're comfortable selling the stock near the current price and want maximum downside protection from the premium.

Many covered call sellers target the 0.20 to 0.35 delta range as a sweet spot. This provides a reasonable premium while keeping the probability of assignment relatively low. However, the right delta depends on your market outlook and goals.

How Market Outlook Affects Your Choice

Your view on where the stock is headed should influence which strike you pick:

Bullish outlook: Choose a higher OTM strike (e.g., delta 0.15-0.25). You expect the stock to rise, so you want to capture as much of that gain as possible. The premium is lower, but you're less likely to have your shares called away and you profit from the stock's appreciation up to the strike.

Neutral outlook: Choose an ATM or slightly OTM strike (e.g., delta 0.40-0.55). You don't expect much movement, so maximizing premium income is the priority. ATM strikes offer the highest time value (extrinsic value), which is what decays in your favor as the seller.

Slightly bearish outlook: Choose an ITM strike (e.g., delta 0.60-0.75). You think the stock may drift lower, so you want the highest possible premium to create a larger downside buffer. The intrinsic value you collect acts as partial protection against a decline. You're also comfortable having your shares called away if the stock stays flat or rises.

A Concrete Example: Three Strikes on the Same Stock

Suppose you own 100 shares of XYZ currently trading at $100 per share, and you want to sell a covered call expiring in 30 days. Here's how three different strike choices compare:

Choice A — $95 ITM Strike (delta ~0.70):

Premium: $7.00 per share ($700 total). This includes $5.00 of intrinsic value and $2.00 of time value.

Max profit if assigned: ($95 - $100) + $7.00 = $2.00/share ($200 total).

Downside protection: Stock can drop to $93 before you start losing money (premium offsets $7 of decline).

Static return (if stock stays at $100): The option is ITM so assignment is likely. Profit = $200 (2.0%).

Choice B — $100 ATM Strike (delta ~0.50):

Premium: $3.50 per share ($350 total). This is entirely time value since the strike equals the stock price.

Max profit if assigned: ($100 - $100) + $3.50 = $3.50/share ($350 total).

Downside protection: Stock can drop to $96.50 before you start losing money.

Static return (if stock stays at $100): Option expires near worthless, you keep $350 premium (3.5%).

Choice C — $105 OTM Strike (delta ~0.30):

Premium: $1.50 per share ($150 total). All time value — no intrinsic value since the strike is above the stock price.

Max profit if assigned: ($105 - $100) + $1.50 = $6.50/share ($650 total).

Downside protection: Stock can drop to $98.50 before you start losing money.

Static return (if stock stays at $100): Option expires worthless, you keep $150 premium (1.5%).

Notice the pattern: the ITM strike gives the most downside protection and the highest immediate premium, but the lowest maximum profit. The OTM strike offers the highest maximum profit potential, but collects less premium and provides a smaller cushion against declines. The ATM strike sits in the middle. There's no single "best" choice — it depends entirely on your outlook and risk tolerance.

How Covered Call Scan Helps You Compare Strikes

Evaluating multiple strike prices across different stocks and expirations by hand is tedious. Our scanner calculates the premium return, downside protection, and probability of assignment for every available contract, so you can quickly compare strikes side-by-side and find the one that matches your strategy. Instead of spending hours combing through options chains, you get ranked results in seconds.

Disclaimer: This article is for educational purposes only and does not constitute financial advice. Options trading involves risk. Always do your own research and consider consulting a financial advisor before making investment decisions.