A cash-secured put and a naked put have the same payoff. The only things that change are how much cash your broker locks up and which account types are allowed to place the trade. That second difference is where traders get hurt, because the account that frees the most capital is also the one that lets you take assignment on far more stock than you could ever pay for.
Key Takeaway
- Profit and loss on a short put are identical whether it is “cash-secured” or “naked.” Only the collateral requirement differs.
- A cash-secured put reserves the full strike value (strike x 100). A naked put in a margin account reserves a fraction of that, set by margin rules.
- IRAs and cash accounts generally limit you to cash-secured puts. Margin accounts can usually sell naked puts once the broker approves the options level.
- More buying power means more simultaneous assignment risk, not more edge.
Same Trade, Different Collateral
Selling a put obligates you to buy 100 shares at the strike if the buyer exercises. The broker needs assurance you can honor that obligation. How it gets that assurance is the whole difference.
- Cash-secured put: you hold cash equal to the strike price times 100. A $100 strike reserves $10,000. If you are assigned, the cash is already there.
- Naked (uncovered) put: you hold only the margin the broker requires, which is a fraction of the strike value. You are counting on being able to fund the purchase, or close the position, if the stock falls.
At expiration the two behave the same way. Your maximum gain is the premium you collect. Your maximum loss is the strike value minus that premium, reached only if the stock goes to zero. Your breakeven is the strike minus the premium. Nothing about the payoff chart changes with the account type. For the strategy itself, see our guide to how a cash-secured put works.
Which Accounts Allow Which Version
| Account type | Cash-secured put | Naked put |
|---|---|---|
| Cash account | Yes, with options approval | No, full collateral required |
| Traditional or Roth IRA | Generally yes, with options approval | Generally no, IRAs cannot borrow on margin |
| Margin account (Reg T) | Yes | Yes, at a higher options approval level |
| Portfolio margin account | Yes | Yes, with risk-based margin |
Treat that table as the usual pattern, not a guarantee. Each broker sets its own options approval levels and decides what it allows inside retirement accounts, so confirm your own account’s level before planning around it. Selling puts is typically a higher approval tier than buying calls, and the application asks about your experience and net worth.
The Roth IRA angle is real: premium collected inside a Roth is not taxed as it accrues, so a cash-secured put is one of the few income strategies that fits a retirement account. The tradeoff is that you must keep the full strike in cash, which is a heavy drag on a small account.
How Much Margin a Naked Put Actually Needs
The exchange-level margin formula for a short equity put is the greater of two numbers:
- 20% of the underlying’s value, minus the amount the put is out of the money, plus the premium received.
- 10% of the strike value, plus the premium received.
Brokers can and often do require more than this minimum, especially on volatile or concentrated positions. Here is an illustrative, hypothetical example.
| Hypothetical setup | Value |
|---|---|
| Stock price | $105 |
| Short put strike | $100 |
| Premium received | $2.00 ($200 per contract) |
| Cash-secured requirement | $10,000 per contract |
| Margin method 1 | $2,100 – $500 + $200 = $1,800 |
| Margin method 2 | $1,000 + $200 = $1,200 |
| Naked put requirement (greater of the two) | about $1,800 per contract |
Same contract, same payoff. The margin version ties up roughly 18% of the capital the cash-secured version does. That gap is the appeal, and it is also the hazard.
Where Capital Efficiency Becomes a Trap
Suppose a hypothetical $20,000 account. Using the numbers above:
- Cash-secured: the account supports 2 contracts. Worst case, you are assigned 200 shares for $20,000.
- Naked on margin: the margin math would let you open 10 or more contracts. Worst case, you are assigned 1,000 shares, a $100,000 purchase, in a $20,000 account.
Nothing in the payoff changed, yet the second trader is exposed to five times the stock for the same account value. If the market drops and every put goes in the money together, the broker issues a margin call and may liquidate positions at the worst prices to cover it. Short puts across different tickers tend to lose together, because sharp selloffs are correlated.
A practical guardrail: size the position as if you had to take delivery, even when the account is margined. Ask “could I hold this stock if assigned?” before asking “does margin allow it?” Our explainer on how options assignment works covers what happens to the account when the shares arrive.
Cost Differences Worth Knowing
Commissions do not depend on whether the put is secured, but they matter when you sell many small-premium contracts. Per our verified broker data (last verified 2026-10-03), tastytrade charges $1.00 per contract to open and $0 to close, capped at $10 per leg. Interactive Brokers Pro uses a premium-tiered schedule, from $0.25 per contract on options priced under $0.05 up to $0.65 at $0.10 and above, with a $1.00 minimum per order. For a put sold for $2.00, both costs are small next to the premium, so choose the account structure first and the commission schedule second.
Portfolio Margin: A Different Animal
Portfolio margin replaces fixed percentages with a risk model that stresses the whole account across a range of market moves. Requirements can be far lower than Reg T for hedged or diversified books, and far higher for concentrated ones. Access normally requires a large minimum equity (historically $110,000 at many brokers) plus a higher approval level, so check your broker’s current threshold. Because requirements are recalculated continuously, they can jump in a fast market, which is when you least want your buying power to shrink.
A Simple Decision Guide
- Selling puts in an IRA or cash account? Cash-secured is your only option. Plan around the full strike value.
- Margin account and you want flexibility? Naked puts become available, but size each one to the cash you could actually deploy if assigned.
- Large account considering portfolio margin? Stress-test the loss if your whole book is assigned at once before relying on the extra room.
- New to selling premium? Start cash-secured even in a margin account. You learn the payoff without borrowed buying power.
Who This Is Not For
If you cannot afford to own 100 shares of the stock at the strike, a short put is the wrong tool in either form. If you are looking for a defined maximum loss below the strike value, you want a put credit spread, which caps the risk by buying a lower-strike put.
Bottom Line
A cash-secured put and a naked put pay the same. The difference is collateral and account eligibility. Use margin to avoid tying up cash, not to take assignment risk you could not fund.
FAQ
Q: Is a cash-secured put safer than a naked put?
A: The payoff is identical, so the risk per contract is the same. A cash-secured put is safer in practice because the cash is already set aside, which limits how many contracts you can sell.
Q: Can I sell naked puts in an IRA?
A: Generally no. Retirement accounts cannot borrow on margin, so brokers typically allow only cash-secured puts. Policies vary, so confirm with your broker.
Q: Does the premium reduce the cash I need?
A: At some brokers the premium credit offsets part of the collateral, and at others it does not. The payoff math is unaffected either way.
Q: What happens if I’m assigned without enough cash?
A: In a margin account, the broker lends the difference and charges margin interest, and may issue a margin call or liquidate positions. In a cash account, the broker would not allow the trade without full collateral in the first place.
Keep Learning
Next, compare the risk profile of buying calls versus selling puts, or see how two popular platforms handle margin in tastytrade vs. Interactive Brokers.