Put Credit Spread: How the Strategy Works (With a Real Trade Example)

A put credit spread is the trade that convinces people options are easy. You sell a put, buy a cheaper one below it, collect a credit, and win as long as the stock does not fall much. It works most of the time, which is exactly the problem: the losses are bigger than the wins, so whether you actually make money comes down to strike selection, position sizing, and whether you have a record of how the strategy has really performed for you.

Key Takeaways

• A put credit spread sells one put and buys a lower-strike put in the same expiration, collecting a net credit that is your maximum profit while the spread width minus that credit is your maximum loss.
• The trade is bullish to neutral and profits from time decay, so it wins on a high percentage of trades while risking more than it can make on any single one.
• Because the win rate is high and the losses are large, the only reliable way to know if the strategy is working is a full record of win rate and average loss size across dozens of trades.

What Is a Put Credit Spread?

A put credit spread is a two-leg options position. You sell one put at a strike below the current stock price, and at the same time you buy another put at an even lower strike in the same expiration. The put you sell is worth more than the put you buy, so the trade opens for a net credit that lands in your account immediately.

You will also see it called a bull put spread or a short put vertical. Those are the same position. Brokers differ on the label: thinkorswim calls it a vertical, tastytrade calls it a put credit spread, and Robinhood just calls it a credit spread. The mechanics do not change.

The long put you buy is not there to make money. It is there to cap the damage. Without it you are selling a naked put with theoretically enormous downside and a margin requirement to match. With it, your worst case is a fixed dollar amount you know before you enter, which is why this is one of the first defined-risk strategies most traders learn after covered calls. If you are still building out your strategy toolkit, the complete guide to options trading strategies maps where this one sits relative to everything else.

Is a Put Credit Spread Bullish or Bearish?

It is bullish to neutral. You keep the full credit if the stock closes above your short strike at expiration, which happens whether the stock rallies hard, drifts sideways, or falls slightly. That is three of the four possible outcomes, and it is why the strategy feels forgiving.

The one outcome that hurts is a meaningful decline through your short strike. You do not need to be right about direction so much as you need to be right about how far the stock will not fall. That distinction matters, because it means the trade is really a bet on volatility and time rather than a bet on a rally.

How to Set Up a Put Credit Spread

The build is the same on every platform:

1. Pick an underlying you are comfortable being neutral to bullish on over the next month. Liquid, optionable names with tight bid-ask spreads only.
2. Choose an expiration, typically 30 to 45 days out.
3. Sell a put below the current price, usually at a strike with a delta near 0.16 to 0.30.
4. Buy a put in the same expiration one to five strikes lower. That gap is your spread width.
5. Submit both legs as a single order at a net credit limit price, never as two separate market orders.

Two execution details save more money than most strategy tweaks. First, always trade the spread as one order. Legging in separately exposes you to the moment between fills where you are holding a naked short put. Second, set your limit at or slightly better than the mid price and be willing to wait. On a spread with a 0.10 wide bid-ask on each leg, taking the market price instead of working the mid costs you a meaningful slice of a credit that might only be 0.60 to begin with.

Put Credit Spread Payoff: Max Profit, Max Loss, and Breakeven

All three numbers are fixed the moment you open the trade. There is no scenario where you lose more than the max loss and no scenario where you make more than the credit.

Metric	Formula
Max profit	Net credit received
Max loss	(Spread width x 100) minus net credit
Breakeven	Short put strike minus net credit per share
Best case	Stock closes at or above the short strike
Worst case	Stock closes at or below the long strike

Notice what the max loss formula implies. On a 5 point wide spread that pays a 1.00 credit, you are risking 400 dollars to make 100. That ratio is the whole strategy in one line, and it is why win rate alone tells you nothing. If you want to model the payoff curve on your own strikes before you place the order, run the numbers through our options profit calculator, and if breakeven math in general is still fuzzy, the walkthrough on how to calculate the breakeven point of your options trade covers it strike by strike.

A Worked Example With Real Numbers

Stock XYZ trades at 100. You are neutral to mildly bullish over the next six weeks. You open a 35 day put credit spread:

• Sell the 95 put for 1.60
• Buy the 90 put for 0.80
• Net credit: 0.80, which is 80 dollars per spread

Your numbers: max profit is 80 dollars. Spread width is 5 points, so max loss is 500 minus 80, or 420 dollars. Breakeven is 95 minus 0.80, or 94.20.

Now walk the outcomes at expiration. If XYZ closes at 108, both puts expire worthless and you keep the full 80 dollars. If XYZ closes at 96, same result: still above your short strike, still full profit. If XYZ closes at 94.20, you break even. If XYZ closes at 92, your short put is 3 points in the money and your long put is worthless, so you lose 300 minus the 80 credit, or 220 dollars. If XYZ closes at 88 or anywhere below 90, both legs are in the money, the spread is worth its full 5 point width, and you lose the maximum 420 dollars.

Run that trade twenty times with an 80% win rate and the arithmetic is sobering: sixteen wins at 80 dollars is 1,280 dollars, four full losses at 420 dollars is 1,680 dollars, and you are down 400 on a strategy that “worked” four times out of five. Real results land better than that because most losers get managed before they reach max loss, but the shape of the math is the point. High win rate is not the same as profitable.

Choosing Your Strikes: Delta, Width, and Probability

Short strike delta is the fastest proxy for probability. A short put with a 0.20 delta has roughly an 80% chance of finishing out of the money, and the option chain gives you that number without any modeling. Most credit spread traders live between 0.16 and 0.30 delta on the short leg.

Lower delta means a higher win rate and a smaller credit. Higher delta means a fatter credit and more frequent trouble. Neither is correct in isolation, and the honest answer is that expectancy across the two is roughly similar once you account for how often each gets tested. What changes is your experience of the strategy: a 0.10 delta spread will feel like free money for months and then take one enormous bite.

Spread width sets your risk per contract. A 1 point wide spread on a 50 dollar stock might risk 85 dollars; a 10 point wide spread on the same name risks 850. Width should be chosen from your position sizing rule, not from whichever strike happens to have the best-looking credit. A common guideline is to keep max loss on any single spread under 2% of account equity.

One rule of thumb worth applying: aim to collect at least one third of the spread width as credit. On a 5 point spread, that means a credit of 1.65 or better. The worked example above collects 0.80 on a 5 point spread, well under that bar, and its 80-against-420 arithmetic shows exactly why the guideline exists: the further the credit falls below a third of the width, the higher your win rate has to be just to break even.

Choosing Your Expiration

The 30 to 45 day window is the standard for a reason. Theta decay on a short option accelerates as expiration approaches, but that acceleration is steepest inside the last two weeks, which is also when gamma risk spikes and a small move against you swings the position value hard. Opening around 45 days and closing around 21 days captures the useful part of the decay curve while stepping aside before the position gets twitchy.

Weekly expirations pay less premium and demand more attention. They can work, but they turn a position strategy into a job. Anything beyond 60 days ties up buying power for a decay rate that has barely started.

Always check the earnings calendar before you pick an expiration. An earnings report inside your window converts a volatility-decay trade into a binary event bet, which is a different strategy with a different risk profile.

Managing the Trade

Most of the edge in this strategy is in management, not entry. Three decisions cover almost every situation.

Taking profit early. Closing at 50% of max profit is the most widely used rule, and the logic holds up. In the example above, buying the spread back at 0.40 locks in 40 dollars of the 80 while releasing buying power and removing all remaining tail risk. The last 50% of the credit takes disproportionately longer to earn and carries the entire downside.

Rolling. If the stock drifts toward your short strike with time left, you can close the spread and reopen it further out in time, further down in strike, or both, ideally for a net credit. Rolling for a credit genuinely improves the position. Rolling for a debit just pays to extend a losing trade, and doing it repeatedly is how a small defined loss turns into a large one. Set a limit in advance on how many times you will roll a single position.

Cutting the loss. A common rule is to close when the loss reaches two times the credit received. That caps the damage well short of max loss and keeps any single trade from mattering too much.

What Happens If the Short Strike Goes In the Money

Being in the money before expiration is uncomfortable but not automatically a problem. American style options can be assigned early, though in practice early assignment on a short put is uncommon until the option is deep in the money with almost no extrinsic value left, or when a dividend makes assignment worthwhile.

If you are assigned on the short leg, you buy 100 shares per contract at the strike price. Your long put is still there and still protects you below its own strike, so the defined risk holds. You can then either exercise the long put to close the whole thing out or sell the shares and close the long put separately. The one scenario that genuinely hurts is letting a spread go to expiration with the stock sitting between your strikes, where the short leg gets assigned and the long leg expires worthless, leaving you long stock over a weekend. Close anything still open on expiration day instead.

Put Credit Spread vs Other Income Strategies

Strategy	Outlook	Capital needed	Max loss
Put credit spread	Bullish to neutral	Low (width minus credit)	Defined
Cash secured put	Bullish, willing to own shares	High (strike x 100)	Large but defined at zero
Call credit spread	Bearish to neutral	Low (width minus credit)	Defined
Iron condor	Neutral, range bound	Low (one side’s width)	Defined
Covered call	Neutral to mildly bullish	High (100 shares)	Large but defined at zero

The put credit spread is the capital-efficient cousin of the cash secured put. Both express the same bullish-to-neutral view, but a cash secured put on a 100 dollar stock ties up 9,500 dollars while the equivalent spread ties up a few hundred. The tradeoff is that you never end up owning the shares, so it does not feed into a wheel strategy the way a cash secured put does. Add a call credit spread above the market and you have built an iron condor, which collects premium from both sides of a range. For a wider comparison of which premium-selling approaches actually hold up, see our breakdown of the most successful options strategy by risk profile.

Where Put Credit Spreads Go Wrong

Four failure modes account for most blown-up credit spread accounts.

• Oversizing. Because the buying power requirement is small, it is easy to put on ten spreads instead of two. In a market-wide drop, correlated positions all go bad at once and the defined risk on each stops feeling defined in aggregate.
• Selling into low volatility. When implied volatility is compressed, credits shrink but the width of the spread does not, so the risk-to-reward gets worse exactly when the market is calmest.
• Rolling forever. Each roll for a debit converts a known loss into a bigger unknown one. Two rolls is a plan. Six is denial.
• Trading illiquid underlyings. Wide bid-ask spreads eat the credit on entry and again on exit, and in a fast move you may not get filled at any reasonable price.

Track Every Spread You Sell

Over my years of trading, the strategies that fooled me longest were always the high win rate ones. A credit spread book feels great for a quarter, and then a single week takes back more than you remember making. The only defense is a record: how many spreads you actually closed at a profit, what your average winner was, what your average loser was, and how much of the total credit you gave back on rolls.

If you are starting from nothing, the free trading journal template is enough to capture entry credit, exit price, and outcome for each spread. When you want the analytics layer on top of that data, the Financial Tech Wiz Trading Journal imports from 25+ brokers and gives you win rate and P&L across your options positions, broken down by symbol and hold duration. Note that multi-leg positions imported automatically come in as individual contracts, so log a spread manually with the total credit and a tag if you want it grouped as one trade.

FAQ

How risky are put credit spreads?

The risk is capped but larger than the reward. Your maximum loss is the spread width times 100 minus the credit you collected, and it is known before you enter. The practical risk is behavioral rather than structural: because the strategy wins most of the time, traders tend to oversize positions and treat defined risk as low risk. One correlated drawdown across several spreads can erase months of credits.

How do you lose on a put credit spread?

You lose when the stock falls below your breakeven, which is the short put strike minus the credit received per share. Losses grow as the stock moves further down and reach the maximum once it closes at or below your long put strike. Between the two strikes you take a partial loss.

When should you sell a put credit spread?

The conditions that favor the trade are elevated implied volatility, a chart that is holding above a clear support level, 30 to 45 days to expiration, and no earnings report inside that window. Elevated volatility matters most because it inflates the credit you collect without changing the width of the spread.

Is a credit put spread bullish or bearish?

Bullish to neutral. It profits if the stock rises, trades sideways, or falls modestly, as long as it stays above the short strike at expiration. Only a meaningful decline through that strike produces a loss.

What happens if a put credit spread expires in the money?

If both strikes are in the money at expiration, the legs offset and you realize the maximum loss. If only the short strike is in the money, you are assigned 100 shares per contract at that strike while the long put expires worthless, which leaves you holding stock. Closing the position on or before expiration day avoids that outcome entirely.

Is a put credit spread the same as a bull put spread?

Yes. Put credit spread, bull put spread, and short put vertical all describe the same position: short a higher-strike put, long a lower-strike put, same expiration, opened for a net credit.