What Are Covered Put Options?
A covered put is a bearish, two-part position: you sell short 100 shares of a stock and, at the same time, sell one put option against that short stock for every 100 shares. The short stock position is what makes the sold put covered, because the obligation created by the put (potentially buying shares at the strike) is offset by the shares you are already short. The trade is the mirror image of a covered call: instead of owning stock and selling calls for income on a neutral-to-bullish view, you are short stock and selling puts for income on a neutral-to-bearish view. The Options Industry Council (OptionsEducation.org) classifies the covered put among the basic option strategies and stresses that it carries the theoretically unlimited upside risk of any short stock position.
This calculator focuses on the option leg of that structure so you can see, in dollars, exactly how the sold put behaves before you commit to the trade. You enter the current stock price, the put strike, the per-share premium, the number of contracts, a target price and days to expiration, and it returns the option leg's profit at your target, the return on the premium, the breakeven price, the maximum loss on that leg, the total cost and the percentage move required to reach breakeven. Understanding the option leg in isolation is the first step to evaluating the whole covered put, which also includes the gains or losses on the underlying short stock.
Because a covered put includes a short stock position, the maximum loss on the overall trade is theoretically unlimited if the stock rises sharply. The SEC (Investor.gov) warns that short selling can expose you to losses larger than your initial investment. This calculator models the option leg only; the short stock side must be evaluated separately. Covered puts are not suitable for beginners or for retirement accounts that prohibit short selling.
Covered Put Option-Leg Formulas
The calculator evaluates the modeled option contract using the standard single-option profit framework. The formulas below show how each result is derived from your inputs. The breakeven and required-move figures describe the option leg relative to the entered premium and current stock price.
Worked Example Using the Calculator's Defaults
The calculator opens with a stock at $100, a $105 strike, a $3.00 per-share premium, one contract, a $115 target and 45 days to expiration. Plugging these into the formulas above gives exact figures because every number is a clean input. The example shows how the option leg behaves if the stock climbs to the $115 target.
- 1Profit at target = (max(0, $115 - $105) - $3.00) x 100 x 1 = ($10 - $3) x 100 = $700
- 2Return on premium = $700 / ($3.00 x 100 x 1) x 100% = $700 / $300 = 233.33%
- 3Breakeven price = $105 + $3.00 = $108.00
- 4Maximum loss = total cost = $3.00 x 100 x 1 = $300
- 5Required move to breakeven = ($108.00 - $100) / $100 x 100% = 8.00%
The key insight is structural. In a true covered put you profit most when the stock falls: the sold put loses value (good for the seller) and the short stock gains. The calculator's option-leg view helps you size the premium income, breakeven and downside math precisely so you can decide whether the credit collected justifies the substantial risk of the short stock position attached to it.
When to Use and When to Avoid Covered Puts
- Use when you have a neutral-to-moderately-bearish view and want to collect premium while short the stock, accepting capped profit in exchange for that income.
- Use only in a margin account that explicitly permits short selling and naked-style option obligations; many IRAs and cash accounts do not.
- Avoid if you cannot tolerate theoretically unlimited loss from the short stock leg during a sharp rally, short squeeze, or takeover announcement.
- Avoid on hard-to-borrow names with high borrow fees, where the cost of maintaining the short can erase the premium collected.
- Avoid through earnings or major catalysts unless you specifically want event exposure, because a gap up is the worst case for this structure.
Covered Put vs. Covered Call
| Feature | Covered Put | Covered Call |
|---|---|---|
| Stock position | Short 100 shares | Long 100 shares |
| Option sold | One put per 100 short shares | One call per 100 long shares |
| Market outlook | Neutral to bearish | Neutral to bullish |
| Maximum risk | Theoretically unlimited (stock rises) | Large but limited (stock to zero) |
| Income source | Premium from the sold put | Premium from the sold call |
Risks of the Covered Put Strategy
The dominant risk is the short stock leg. If the underlying rises, the short shares lose money with no theoretical ceiling, and the modest premium from the sold put provides only a small cushion. Short squeezes, buyout announcements and broad rallies can all force losses far larger than the credit collected. Additional risks include borrow costs and recall risk on the shorted shares, early assignment on the short put if it moves deep in-the-money, and the obligation to pay any dividends on the borrowed stock. Profit on the strategy is capped because the most a covered put can earn is limited by the short entry price and the premium, while the loss is open-ended.
Tax Treatment of Covered Put Trades (US)
For U.S. taxpayers, premium from writing a put and the closing of the option leg are generally treated as capital gains or losses under IRS Publication 550, Investment Income and Expenses, and the option rules of Internal Revenue Code Section 1234. Gains on short stock positions are generally short-term capital gains regardless of how long the short is held, and short sales have specific holding-period and constructive-sale rules described in Publication 550. Combining a short sale with an offsetting option can also implicate the straddle rules, which can defer losses and affect holding periods. Report option and short-sale transactions on IRS Form 8949 and Schedule D. This is general educational information, not tax advice; consult a qualified tax professional or the current IRS publications for your specific situation.
Common Mistakes With Covered Puts
- Treating the strategy as low risk because the put is covered, while ignoring that the short stock leg carries unlimited upside risk.
- Forgetting borrow fees and dividend obligations on the shorted shares, which reduce the net credit below the headline premium.
- Selling the put too far out-of-the-money, collecting almost no premium for the same open-ended short stock risk.
- Ignoring early-assignment risk on the short put, which can unexpectedly close out the short stock leg at the strike.
- Confusing the option leg's breakeven shown here with the breakeven of the full covered put, which depends on the short entry price.
How This Calculator Helps
Instead of working out the option-leg math by hand, this tool instantly returns the profit at your target, the return on the premium, the breakeven, the maximum modeled loss, the total cost and the required move for any strike, premium and contract count. Adjust the inputs and every figure updates, so you can size the premium income and downside precisely and then weigh it against the open-ended risk of the short stock position that makes a covered put covered. All outputs are model estimates based on your inputs and are educational only, not live quotes or personalized investment advice.
