PutFinder › Cash-secured put vs covered call
Cash-secured put vs covered call
A cash-secured put is an options contract you sell while setting aside enough cash to buy 100 shares of the stock at the strike price if you are assigned. A covered call is an options contract you sell against 100 shares you already own, giving the buyer the right to buy those shares from you at the strike price. Both collect an upfront premium, and both are legs of the wheel. This page compares them mechanically — capital, what you hold, assignment, dividends, and the near-identical payoff that put-call parity produces.
What each one is
Both are ways an option seller collects premium, and both stand behind 100 shares of stock per contract — but they start from opposite sides. A cash-secured put starts from cash: you sell a put and hold the strike amount in reserve, ready to buy the shares if the stock falls to the strike and you are assigned. A covered call starts from shares: you already own 100 shares and sell a call against them, agreeing to hand the shares over at the strike if the stock rises through it. New to either? The plain-language guide to cash-secured puts defines the key terms first.
Put-call parity — the key insight
Here is the point most comparisons skip: a cash-secured put and a covered call written at the same strike and expiration have essentially the same payoff. This is not an opinion — it follows from put-call parity, a fixed arithmetic relationship between the prices of a put, a call, the stock, and cash. A covered call is long stock plus a short call; a cash-secured put is a short put plus cash held equal to the strike. Put-call parity says those two combinations produce the same profit-and-loss profile at expiration, at every possible stock price.
long stock + short call ≡ short put + cash (= strike)
In both, your upside is capped at the strike, you keep the premium, and you carry the full downside of owning the shares below the strike. The differences in the table below — what you hold, dividends, the reserved cash — are real, but they are secondary; the core payoff is the same. Strictly, parity is exact for European-style options ignoring dividends and the interest on the cash, so in practice the two differ slightly on dividends, financing, and early-assignment mechanics — but the shape of the payoff is shared. This is arithmetic and market structure, not a claim about which will earn more.
Cash-secured put vs covered call, side by side
A descriptive comparison of the two — what differs mechanically, not a claim that either is “better.”
| Cash-secured put | Covered call | |
|---|---|---|
| What you sell | A put option | A call option |
| What you hold | Cash set aside to buy the shares | 100 shares per contract you already own |
| Capital required | Strike × 100 per contract, reserved in cash | The value of the 100 shares you hold per contract |
| At assignment | You buy 100 shares at the strike (stock at/below strike) | Your 100 shares are called away — sold at the strike (stock at/above strike) |
| Dividends | You hold cash, not shares — no dividend (cash may earn interest) | You hold the shares — you receive dividends unless/until called away |
| Premium | Collected upfront; kept in every case | Collected upfront; kept in every case |
| Payoff profile | Near-identical at the same strike and expiration (put-call parity) | |
| Typical mechanical context | Held by someone without the shares who is willing to buy at the strike | Held by someone who already owns the shares and is willing to sell at the strike |
| Place in the wheel | The entry leg (cash-secured) | The exit leg (share-secured) |
When each is used
The two share a payoff but start from different holdings, and that starting point is the plain mechanical distinction. A covered call is written by someone who already owns the shares and is willing to sell them at the strike — the call is written against stock in hand. A cash-secured put is written by someone who does not hold the shares but is willing to buy them at the strike — the put is backed by cash in hand. Shares in hand versus cash in hand: that is the mechanical difference, even though put-call parity makes the payoffs converge.
Neither is presented here as the “better” or “best” choice. Which one fits a given situation depends on what you already hold, your account and margin type, dividend and tax treatment, and other factors this page does not evaluate — the decision is yours. PutFinder screens cash-secured puts; it does not rank covered calls and it does not tell you which to write.
Compute it yourself
To work out the per-contract arithmetic on your own inputs, use the two free calculators — each does pure arithmetic on the numbers you type, with no ranking and no recommendation. For the cash-secured put side (capital secured, static and annualized yield, breakeven, downside buffer), use the cash-secured put calculator. For the covered call side (premium collected, return if unchanged, return if called away, breakeven, max gain if called), use the covered call calculator. Both live on the tools hub. To see how PutFinder ranks cash-secured puts, read how a CSP screener works and the scoring methodology.
References
- The Options Industry Council (OIC) — options basics, the cash-secured put and the covered call, and assignment: optionseducation.org.
- Cboe Options Institute — education on options mechanics, strategies, and terminology: cboe.com/education.
- Stoll, H. R. (1969). “The Relationship Between Put and Call Option Prices,” The Journal of Finance 24(5) — the original statement of put-call parity: doi.org/10.1111/j.1540-6261.1969.tb01694.x.
Common questions
Is a cash-secured put the same as a covered call?
Not literally, but they are close relatives. Written at the same strike and expiration, a cash-secured put and a covered call have essentially the same payoff profile — a consequence of put-call parity, the fixed arithmetic relationship between a put, a call, the stock, and cash. Mechanically they differ: a covered call is 100 shares you own plus a short call, while a cash-secured put is a short put plus cash set aside to buy the shares. Descriptive comparison, not investment advice.
Which requires more capital, a cash-secured put or a covered call?
They tie up capital of the same order of magnitude. A cash-secured put sets aside cash equal to the strike × 100 per contract, so you can buy the shares if assigned. A covered call ties up the value of the 100 shares you already hold per contract. The exact dollar figures differ — one is measured against the strike, the other against your share cost basis — but neither is a low-capital strategy; both require enough to stand behind 100 shares.
What is put-call parity?
Put-call parity is a fixed relationship between the prices of a European put and call on the same stock at the same strike and expiration: long stock plus a short call has the same payoff as a short put plus cash held equal to the strike. It is arithmetic and market structure, not a forecast. It is why a covered call and a cash-secured put at the same strike and expiration produce a near-identical profit-and-loss profile.
What happens at assignment for each?
With a cash-secured put, if the stock is at or below the strike at expiration you are typically assigned and use the reserved cash to buy 100 shares per contract at the strike. With a covered call, if the stock is at or above the strike you are typically assigned and your 100 shares per contract are called away — sold at the strike. In both cases you keep the premium. Assignment is a mechanical outcome, not a probability claim about any given trade.
Can you use both — the wheel?
Yes. The wheel combines them: sell a cash-secured put as the entry leg; if assigned and you end up holding the shares, sell a covered call against them as the exit leg; repeat. The cash-secured put is the cash-secured entry, the covered call the share-secured exit. This describes how the two fit together mechanically — not a recommendation to run the strategy.
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