Cash-Secured Puts: The Complete Guide

What is a cash-secured put?

A cash-secured put is a short put backed by cash. You sell one put, usually at or below the current price, and hold strike × 100 in cash against it. That cash makes it "secured": if the put is assigned, the money is already there to buy the shares.

OIC calls it primarily a stock acquisition strategy for a price-sensitive investor, and the framing matters. You are naming the price at which you are happy to own the stock and getting paid to wait, not selling a lottery ticket hoping it expires worthless. Both outcomes must be acceptable: keep the premium and stay in cash, or buy the shares at a discount. Being assigned on a stock you did not want at a price you did not choose is the failure mode.

Cash-secured put example: the full math

Round numbers, no commissions, 30 days to expiration. Every figure here is illustrative, not a quote on a real ticker.

• Stock price today: $50.00.
• Put sold: 1 contract, $48 strike, $1.20 premium = $120.00 credit.
• Cash set aside: $48 × 100 = $4,800; net committed $4,680.

Max profit = premium = $120, at any price at or above $48.
Breakeven = strike − premium = $48.00 − $1.20 = $46.80.
Max loss = ($48.00 − $1.20) × 100 = $4,680 if the stock goes to zero.
Return on cash = $120 ÷ $4,800 = 2.5% over 30 days; annualized = 2.5% × (365 ÷ 30) = 30.4% — a rate on one trade that assumes the same cash is redeployed at a similar premium monthly, not a projection.

At expiration, with assignment handled at the strike:

• Stock at $55.00: expires worthless. +$120, still in cash, no rally.
• Stock at $48.00: expires worthless at the strike. +$120.
• Stock at $46.80: assigned with a $46.80 basis. Zero profit, zero loss.
• Stock at $45.00: −$180; at $40.00, −$680.

The effective purchase price is $46.80 against a stock at $50.00 — a 6.4% discount, and the economic case for the strategy. The cash-secured put calculator returns max profit, breakeven, return on cash and annualized yield, and how to screen for cash-secured puts covers finding the trade.

Cash-secured put vs covered call vs cash-covered put — don't confuse them

• Cash-secured put — cash collateral + short put. Bullish to neutral. Max profit is the premium; max loss is the strike less premium. Requires the cash, not the shares.
• Covered call — 100 shares + short call. Bullish to neutral. Max profit is strike minus cost basis plus premium; max loss is cost basis less premium. Requires the shares, works in an IRA, and has the same payoff shape from the other side of the balance sheet — see the complete covered call guide.
• Covered put — short 100 shares + short put. Bearish to neutral. Needs margin and short-sale permission, is barred in an IRA, and carries uncapped upside risk. Not a synonym for either of the others.

"Cash-covered put" is just the broker-facing name for a cash-secured put, not the short-stock strategy — unpacked in the cash-covered put guide.

What you already hold decides it: shares make the call the income trade, cash makes the put the income trade, and doing both in sequence is the wheel strategy. For the full comparisons see covered call vs cash-secured put and covered put vs covered call. We unpack the naming confusion in the cash-covered put guide.

Choosing the strike and expiration

The strike sets your purchase price and the premium you are paid for agreeing to it: further out of the money means less of both, closer to the money more. Expiration decides how long the cash is committed — 30–45 days collects meaningful time value; weeklies collect less and need more attention.

Write the strike you would accept in cash, on a stock you are content to own at that price, and never write more contracts than the cash covers. Premium is the tiebreaker between two strikes you like, not the reason to choose one you do not.

Assignment: when the put finishes in the money

Standardized US equity options are American-style, so a put holder can exercise any business day, and OCC assigns that notice at random among clearing members short the series. At expiration, exercise-by-exception covers equity options $0.01 or more in the money, so a short put settling a penny below the strike gets assigned.

For a cash-secured put that is the plan working: the cash is there, the shares arrive, the trade becomes a stock position. Two cautions — early assignment is likeliest when the put is deep in the money with little time value left, and assignment settles after the fact, so a gap lower may be yours before you know it. OIC puts more than 72% of contracts closing before expiration, about 22% expiring without value, and roughly 6% exercised.

Risk: what the premium does not cover

• The stock can fall far further than the premium. $1.20 cushions 2.5% of a $48 strike; a 20% decline is an $800 loss on a position that collected $120.
• You buy falling knives by design. Assignment follows a decline, so you are most likely to own the stock when it looks worst; the trade works only if your view outlasts expiration.
• Opportunity cost in a rally. A stock running from $50 to $65 pays $120 where ownership made $1,500.
• The yield illusion. A 30% annualized rate pays for equity risk; failing trades give back months of premium.

Cboe's PUT Index tracks a hypothetical portfolio writing monthly at-the-money S&P 500 index puts against interest-bearing cash. A Cboe-published guest commentary by Belmont Capital's Stephen Solaka reported that from July 1986 through August 2023 it returned 9.40% annualized against 9.91% for the S&P 500, with a 10.26% standard deviation against 15.38% and a −32.66% maximum drawdown against −50.96%: lower return, smoother ride.

Accounts, margin, and the IRA question

Cboe's strategy-based margin schedule is explicit: a cash-account short put needs cash or cash equivalents equal to the aggregate exercise price, or an escrow agreement. On a $48 strike that is $4,800 per contract, held by the broker — the reason the cash is unavailable for anything else. A margin account is looser: FINRA Rule 4210 requires 100% of the option proceeds plus 20% of the underlying value less any out-of-the-money amount, with a minimum of proceeds plus 10% of the exercise price for equity puts. That is the naked put requirement, not a cash-secured put.

Securing it with cash is also why the trade survives IRA rules: the IRS treats borrowing against an IRA as a prohibited transaction, and a put backed by cash is not borrowing. Fidelity lists cash-covered puts among IRA-available strategies; Schwab's Level 0 tier covers IRAs without margin. Approval is still required under FINRA Rule 2360, and Notice 21-15 notes it can be limited to specific transaction types.

Taxes on a cash-secured put

IRS Publication 550 is direct: the premium is not income when received. It sits in a deferred account until the obligation expires, the put is exercised, or you close the position.

• Expires worthless: the premium is a short-term capital gain, however long the option was open.
• Assigned: the premium reduces your basis, and your holding period begins the day you buy the stock, not the day you wrote the put.
• Closed early: the difference between what you pay to close and the premium received is short-term.

The basis rule is what people get wrong: repeated puts on a name you are eventually assigned create one stock position with a lower basis and a fresh holding period, not a series of small gains.

Related strategies

More: the cash-secured put explainer and the full CSP strategy guide.

Sources

• Options Industry Council — Cash-Secured Put.
• Options Industry Council — Options Exercise FAQ.
• OCC — Characteristics and Risks of Standardized Options.
• Cboe — Strategy-based Margin.
• FINRA Rule 4210 — Margin Requirements.
• FINRA Regulatory Notice 21-15 — Options Account Approval.
• IRS Publication 550 (2025) — Investment Income and Expenses.
• IRS Publication 590-A — IRAs.
• Cboe guest commentary, Stephen Solaka (Belmont Capital Group), Oct 6, 2023.
• Charles Schwab — How to place a cash-secured put.
• Fidelity — Options trading FAQs.

Written by the OptionsPilot Editorial Team. Educational information only, not financial or tax advice. Worked examples are illustrative, not quotes on any real security. Index statistics are historical and are not a forecast.

Cash-Secured Put FAQ