Original comparison · Reviewed 27 September 2026

Same bullish forecast, opposite premium direction — one trade pays you to wait, the other pays you to be right.

A bull call spread and a bull put spread can express nearly the same moderately bullish view, but one is a debit spread and the other is a credit spread — a structural difference that changes how time decay, margin, and capital requirements work for each.

Bull call spread: structure

Buy a call at a lower strike, sell a call at a higher strike, same expiration — a debit spread. The premium received from the short call partially offsets the cost of the long call.

Example: Stock at $100. Buy the $100 call for $6, sell the $110 call for $2. Net cost: $4.00.

Breakeven = lower strike + net debit = $100 + $4 = $104
Max profit = strike width − net debit = $10 − $4 = $6.00, achieved at or above $110
Max loss = net debit paid ($4.00), if the stock finishes at or below $100

Bull put spread: structure

Sell a put at a higher strike, buy a put at a lower strike, same expiration — a credit spread. The premium paid for the long put partially offsets the premium received from the short put.

Example: Same $100 stock. Sell the $95 put for $3, buy the $90 put for $1. Net credit: $2.00.

Breakeven = short strike − net credit = $95 − $2 = $93
Max profit = net credit ($2.00), achieved at or above $95
Max loss = strike width − net credit = $5 − $2 = $3.00, if the stock finishes at or below $90

Same view, opposite relationship with time

Both trades want the stock to rise or, at minimum, stay above a threshold. But the bull put spread's short leg decays faster than its long leg, giving it positive theta — every day the stock stays above $95 without incident, the position gains value even if the stock doesn't move at all. The bull call spread needs the stock to actually climb past $104 before expiration; time decay works against it the entire way, since it was purchased for a net cost that erodes if the move doesn't happen in time. A trader with genuine conviction the stock will climb decisively might prefer the debit version's larger max profit; a trader who mainly wants to avoid the stock falling might prefer the credit version's wider margin for error.

Different capital requirements

The bull call spread's maximum loss is the $4.00 already paid — nothing further is required. The bull put spread's maximum loss ($3.00 in the example) is typically posted as margin collateral against the $2.00 credit received, which means the bull put spread usually ties up more capital relative to what it pays out than the bull call spread ties up relative to its cost. This is the same underlying trade-off covered in the broader credit spread vs debit spread comparison, applied specifically to the bullish pair.

Near-equivalent payoffs, different strike choices in practice

Constructed at matching strikes, a bull call spread and a bull put spread are close to economically equivalent by put-call parity, before financing and dividend effects. In practice, traders rarely pick identical strikes for both — the strike selection for a credit spread is usually driven by the probability the short strike holds, while a debit spread's strikes are often chosen around a specific price target, so the two versions typically end up with different breakevens and risk/reward ratios even when expressing the same underlying view.

How to choose

Pick the bull call spread when you have real conviction about the size of the move and want a defined, larger max profit if you're right, at the cost of needing that move to actually happen.
Pick the bull put spread when your main thesis is that the stock won't fall below a specific level — you get paid upfront and time decay works in your favor while that holds.
For the bearish mirror of this pair, see bear call spread vs bear put spread.

Frequently asked questions

Are a bull call spread and a bull put spread the same trade?

They express the same moderately bullish forecast, but structurally they're opposites: a bull call spread is a debit trade (you pay upfront, buying a lower-strike call and selling a higher-strike call), while a bull put spread is a credit trade (you're paid upfront, selling a higher-strike put and buying a lower-strike put). Both profit from the underlying rising or staying flat above the relevant strike, with defined risk on both sides.

Which one benefits from time decay?

The bull put spread does. As a credit spread, its short leg is closer to the money and decays faster than its long leg, so time passing without an adverse move works in its favor. The bull call spread, as a debit spread, needs the underlying to actually rise before expiration erodes the position's value — time decay works against it.

Which one requires less capital to hold?

The bull call spread's maximum loss is simply the net debit already paid, with no further collateral required. The bull put spread's maximum loss (strike width minus credit received) is typically posted as margin, which usually ties up more capital relative to the credit collected than the bull call spread ties up relative to its cost.

Do they have the same breakeven and max profit?

Not necessarily — breakeven and max profit depend on the specific strikes and premiums chosen for each, not on the trade being a credit or a debit. They can be constructed to have very similar payoff diagrams (put-call parity means a bull call spread and a bull put spread at the same strikes are close to economically equivalent before financing and dividend effects), but in practice traders often pick different strikes for each based on the premium and probability profile they want.

When would I choose the credit version over the debit version?

Choose the bull put spread when you want to be paid for a moderately bullish view and benefit from the underlying simply not falling, or when you're comfortable posting the margin a credit spread requires. Choose the bull call spread when you'd rather pay a smaller, fixed amount upfront with no margin requirement beyond that payment, and are comfortable needing the underlying to actually move up to profit.

Disclaimer: This comparison is educational only and does not constitute investment or options-trading advice. Multi-leg spreads carry execution and assignment risk that varies by broker and market conditions. Consult a qualified financial advisor before trading options.

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