What Is a Vertical Spread? Debit and Credit Spreads Explained

Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026

A vertical spread is an options position that buys one option and sells another of the same type (two calls or two puts) on the same stock, with the same expiration but a different strike price. The option you sell pays for part of the option you buy and caps how far the trade can run in either direction, so both your maximum profit and your maximum loss are known the moment the trade is filled.

That is the big difference from the single options in Course 1. A long call has a fixed loss but open-ended upside; a short call has a capped gain and, if uncovered, an unlimited loss, because a stock has no price ceiling. A vertical spread fixes both ends.

How does a vertical spread work?

Every vertical spread has the same four ingredients:

• Same underlying. Both options are on XYZ.
• Same type. Two calls, or two puts. Mixing a call with a put is a different strategy.
• Same expiration. Both legs expire on the same day.
• Different strikes. One leg is bought and one is sold, one contract each (or the same number of each).

The distance between the two strikes is the spread's width. Width matters because, at expiration, a vertical spread can never be worth less than $0 or more than its width: two options that are both in the money gain and lose the same amount as the stock moves, so their difference stops changing.

What is the difference between a debit spread and a credit spread?

Every vertical either costs money to open or pays you to open, depending on which leg is more expensive.

• Debit spread: you buy the more expensive option and sell the cheaper one, so you pay a net debit. The most you can lose is that debit; the most you can make is the width minus the debit.
• Credit spread: you sell the more expensive option and buy the cheaper one, so you receive a net credit. The most you can make is that credit; the most you can lose is the width minus the credit.

In one sentence each: a debit spread's maximum loss is the net debit, and a credit spread's maximum loss is the strike width minus the net credit, both times 100 per contract.

The more expensive leg is the one closer to (or deeper into) the money. For calls that is the lower strike; for puts it is the higher strike.

What are the four types of vertical spreads?

Two directions (bullish or bearish) times two option types (calls or puts) gives four verticals. Each direction has a debit version and a credit version:

The Options Industry Council (OIC) video library groups bull put and bear call spreads as credit spreads, and covers bull call and bear put spreads under debit spreads.

The debit spreads need the stock to move in your direction; they risk less than they can make. The credit spreads mostly need the stock not to move against you; they can make less than they risk. Neither is better in general. The rest of this module walks through each one, starting with the bull call spread.

Why do traders use vertical spreads instead of single options?

• A known worst case. The maximum loss is set when you open the trade, which makes position sizing straightforward: you size by the spread's maximum loss, as How Many Contracts to Trade - Sizing Spreads by Maximum Loss covers.
• Lower cost than buying outright. The sold option pays for part of the bought one. The 50/55 call vertical above costs $164, versus $224 for the 50 call alone.
• A way to sell premium without unlimited risk. A credit spread collects premium like a short option but buys a further-out option as a hard stop, so a big move cannot run the loss past the width.
• Less sensitivity to implied volatility. The two legs partly offset each other's exposure to changes in implied volatility, so a spread usually gains or loses less from an IV change than a single option. What Is Vega in Options? How Implied Volatility Moves Option Prices covers why that matters.

The cost of all of this is a capped upside. A spread gives up any move beyond the short strike.

What do you need to trade vertical spreads?

Spreads usually need a higher options approval level than buying calls and puts, and many brokers require a margin account for them. Options Trading Levels - Broker Approval and Permissions covers how approval works.

Under FINRA Rule 4210, the long option in a spread must be paid for in full, the margin on the short option is capped at the spread's maximum potential loss, and the short option's proceeds can be applied toward those amounts. In practice, a debit spread commonly ties up its debit, and a credit spread roughly its width minus the credit received. Brokers can set stricter house requirements than the rule's minimum, so check yours.

Enter both legs as one multi-leg order with a net limit price, so you never end up holding one leg without the other. Commissions and contract fees apply to each leg, on the way in and out.