What Is a Cash-Secured Put?

The Definition, in Plain Terms

When you sell a cash-secured put, you sell someone else the right to sell you 100 shares of a stock at a fixed price (the strike) any time before a fixed date (the expiration). In exchange, they pay you a premium immediately, and it's yours to keep no matter what happens next.

The "cash-secured" half is the important part. Your broker freezes enough cash to actually buy those 100 shares — strike price times 100 — and holds it as collateral until the position closes. That's what separates this from a naked put, where you'd be taking the same obligation without demonstrably having the money to honour it. You'll also see this called a cash-covered put; the terms are interchangeable.

Only two things can happen at expiration:

• The stock closes above your strike. Nobody wants to sell you shares below market price, so the option expires worthless. You keep the premium and your collateral is released.
• The stock closes below your strike. You buy 100 shares at the strike price. You still keep the premium, which means your real cost per share is the strike minus the premium you collected.

Notice that there's no outcome where you lose the premium. The risk isn't in the premium — it's that you end up owning a stock that keeps falling after you bought it.

How Does a Cash-Secured Put Work? A Worked Example

Say SOFI is trading around $17.50 and you'd be comfortable owning it at $16. You sell one put contract at the $16 strike, 35 days out, and collect $0.55 per share.

• Premium received: $0.55 × 100 = $55, credited immediately
• Collateral locked: $16 × 100 = $1,600
• Breakeven: $16 − $0.55 = $15.45 per share
• Return if it expires worthless: $55 ÷ $1,600 = 3.4% in 35 days

That 3.4% over 35 days annualizes to roughly 36% — though "annualized" assumes you keep finding comparable trades every month, which is an assumption, not a promise. If SOFI closes above $16, you keep the $55 and your $1,600 is freed to do it again. If it closes at $15, you buy 100 shares at $16 for $1,600, but your effective cost is $15.45, so you're down about $45 on paper rather than the $100 a share-buyer would be.

The same trade on a lower-volatility stock pays much less. A $60 put on KO trading near $62 might bring in $0.60 for the same 35 days — about 1.0%, or roughly 10% annualized. That gap is the entire trade-off in options selling: premium is compensation for volatility, and volatility is the thing that can hurt you after assignment.

Cash-Secured Put vs Covered Put — Not the Same Thing

These names are close enough to cause real damage, so it's worth being precise. A cash-secured put is backed by cash. It's a bullish-to-neutral trade, and the worst case is owning a stock you already said you wanted at a price you already chose.

A covered put is a short put paired with a short stock position. It's bearish, it requires margin, and because the short shares can rise without limit, so can the loss. It is not a beginner's income strategy and it is not what people mean when they talk about the wheel.

If you're reading about selling puts for income, you want the cash-secured version. If a broker or article says "covered put," read twice.

How to Place Your First Cash-Secured Put

The mechanics are the easy part. The order ticket looks like this:

• Pick the stock first, not the premium. The only stocks that belong here are ones you'd genuinely accept owning through a 20% drawdown.
• Check earnings. If an earnings date falls before expiration, you're holding a binary event. Most wheel traders simply avoid that window.
• Choose an expiration 30–45 days out. This is where time decay is efficient relative to the risk you're carrying.
• Choose a strike by delta, typically 0.16–0.30 (more on this below).
• Select "Sell to Open" one put contract and use a limit order near the mid-price. Market orders on options are an expensive habit.
• Confirm the collateral. Your buying power should drop by strike × 100. If it doesn't, you may have placed a naked put instead.

You need options approval Level 1 or 2 at most brokers for cash-secured puts — one of the lowest tiers, because the risk is capped and defined.

What Is the Best Delta for Cash-Secured Puts?

Delta does double duty here. Formally it measures how much the option price moves per $1 move in the stock, but the useful shortcut is that delta approximates the probability the option finishes in the money. A 0.25 delta put has roughly a 25% chance of assignment and a 75% chance of expiring worthless.

Most wheel traders operate between 0.16 and 0.30 delta. The choice inside that band is a genuine strategic decision rather than a right answer:

• 0.16 delta (~84% OTM): conservative. Thin premium, rare assignment. Suits people who want the cash more than the shares.
• 0.25 delta (~75% OTM): the common default. A reasonable balance of income and assignment frequency.
• 0.30+ delta (~70% OTM): aggressive. Meaningfully more premium, and you should expect assignment regularly.

If you're running the wheel deliberately — where assignment is a feature, not a failure — higher delta is defensible. If assignment would strain your account, stay low.

Can You Close a Cash-Secured Put Early?

Yes, and you often should. You close by buying the same contract back ("Buy to Close"). If the stock rose or time simply passed, the put is cheaper than what you sold it for, and the difference is realized profit. Your collateral is released the moment the position closes.

A widely used rule is to close at 50–75% of maximum profit rather than holding to expiration. Selling a put for $55 and buying it back for $15 locks in $40. Holding for the last $15 means carrying the position — and its assignment risk — through the final stretch for progressively less reward. The capital you free up can start earning again immediately.

The other early exit is rolling: buying back the current put and selling another at a later expiration, sometimes at a lower strike. That's the standard response to a position moving against you, and it's a topic in its own right — see when to roll a cash secured put.

Can Cash-Secured Puts Be Assigned Early?

They can, but it's uncommon, and it's less alarming than beginners expect. US equity options are American-style, so the holder may exercise any day. In practice, exercising early throws away the option's remaining time value, so it mainly happens when a put is deep in the money with almost no extrinsic value left. Higher interest rates make it somewhat more likely, since the buyer gets cash sooner.

If it happens: you keep 100% of the premium and you buy the shares at the strike you already chose. Nothing about the trade's economics changed — the timeline did. You just move into the covered call phase earlier than planned, and your cash needs to be there, which is precisely what the collateral requirement guarantees.

Calculating Your Return

Two numbers matter, and brokers rarely show either clearly.

Return on capital is premium ÷ collateral. The $55 premium against $1,600 collateral is 3.4%. Measuring against collateral rather than the stock price is what keeps you honest about the capital actually tied up.

Annualized return scales that to a year: return on capital × (365 ÷ days held). The same 3.4% over 35 days is about 36% annualized. This is the only fair way to compare a 30-day trade against a 45-day one — but treat it as a comparison tool, not a forecast, since it silently assumes uninterrupted redeployment at the same rate.

Our free cash-secured put calculator works both out for a single trade, and the cash-secured put screener computes them across 300+ tickers alongside IV rank and earnings flags, so you can compare candidates without a spreadsheet.

Where This Fits in the Wheel Strategy

The cash-secured put is step one of the options wheel strategy. You sell puts on a stock you want until you're assigned. Once you own the shares, you sell covered calls against them until they're called away. Then you start again.

This reframes assignment entirely. Outside the wheel, assignment feels like something going wrong. Inside it, assignment is the mechanism — it's how you acquire shares at a discount to where the stock was when you opened the trade, having been paid to wait. The traders who struggle are the ones selling puts on stocks they never actually wanted to own.

Frequently Asked Questions