If you've been trading options for any amount of time, you've heard the term credit spread. It's one of the most popular strategies among retail traders, and for good reason — it gives you defined risk, a statistical edge, and doesn't require picking direction perfectly.

The Simple Definition

A credit spread is an options strategy where you sell one option and buy another option of the same type (both calls or both puts) at a different strike price, in the same expiration. You receive a net credit when you open the trade, and that credit is your maximum profit.

The option you sell is more expensive (closer to the money), and the option you buy is cheaper (further from the money). The difference in premiums is your credit.

How It Works in Practice

Let's say AAPL is trading at $195. You're mildly bullish and want to sell a put spread.

  • Sell the $185 put for $2.80
  • Buy the $180 put for $1.50
  • Net credit: $1.30 per share ($130 per contract)

    • Your max profit is $130 if AAPL stays above $185 at expiration. Your max loss is $370 ($5 spread width minus $1.30 credit, times 100). That's it. No surprises.

    Why Traders Love Credit Spreads

    Defined risk. Unlike selling naked options, your loss is capped. You always know your worst-case scenario before entering the trade.

    Time decay works for you. As an option seller, theta is your friend. Every day that passes with the stock not moving against you, your spread loses value — which is exactly what you want.

    You don't need to be right about direction. With a bull put spread, you profit if the stock goes up, stays flat, or even drops a little. You only lose if it drops below your short strike by more than the credit received.

    Lower capital requirement. Compared to selling cash-secured puts, credit spreads tie up far less capital. A $5-wide put spread might require $370 in margin versus $18,500 for a cash-secured put on a $185 stock.

    The Two Types of Credit Spreads

    | Type | When to Use | You Sell | You Buy | Bull put spreadBullish/neutralHigher strike putLower strike put | Bear call spread | Bearish/neutral | Lower strike call | Higher strike call |

    Both collect premium upfront. Both have defined risk. The difference is directional bias.

    What Determines Your P&L

    Three things drive credit spread profitability:

  • Stock price at expiration relative to your short strike
  • Time decay eroding the value of both legs
  • Implied volatility changes affecting the spread's value

    • If IV drops after you sell the spread, both options lose value, which helps you. This is why selling spreads in high-IV environments tends to work well.

    Key Risk to Understand

    The max loss on a credit spread happens when the stock blows through both strikes. Using our AAPL example, if AAPL drops to $175, both options are deep in the money, and you lose the full $370.

    The risk-reward on most credit spreads isn't 1:1. You might risk $370 to make $130. That looks bad on paper, but if you're selling at 20-delta, you'll win roughly 80% of the time. Over many trades, the math works.

    Getting Started

    Tools like OptionsPilot can help you screen for credit spread opportunities across multiple stocks and expirations, sorting by probability of profit and risk-reward ratio so you're not guessing which strikes to pick.

    Credit spreads are a core building block. Once you understand them, you can stack them into iron condors, adjust them when trades go wrong, and build a consistent income strategy around selling premium.