Long Put: How It Works, Break-Even, and Tax Rules

A long put option is a contract you buy that gives you the right, but not the obligation, to sell 100 shares of a stock at a set strike price any time before the contract expires. You pay a premium up front for that right. Your loss is capped at the premium; your profit grows as the stock falls below the strike, and your break-even at expiration is the strike price minus what you paid.¹

What the Contract Actually Gives You

Buying a put purchases a right, not a duty. If the trade moves the wrong way, you walk away and let the contract expire worthless. The premium is what you paid for that flexibility.¹ The person on the other side, the writer, took your premium and is now obligated to buy the shares from you at the strike if you choose to exercise. The writer has no say once you act.²

One standard equity option contract covers 100 shares.³ That multiplier drives every dollar figure in options. A put quoted at $5.00 costs $500, not $5. Profits and losses scale the same way.

Most U.S. equity and ETF options are American-style, so you can exercise on any business day before expiration. Index options are typically European-style: exercise is only available at expiration itself, and they settle in cash rather than shares. Check the contract specifications before you assume you can act early. All listed contracts clear through the Options Clearing Corporation, which standardizes terms and stands behind both sides of the trade.⁴

For puts expiring in nine months or less, FINRA requires you to deposit 100 percent of the purchase price. You pay in full. Longer-dated contracts (LEAPS) drop to a 75 percent margin requirement on the current market value.⁵ Individual brokers can be stricter, so confirm before you place an order.

Break-Even, Maximum Profit, and Maximum Loss

The math is clean. At expiration, your break-even equals the strike price minus the premium you paid. Buy a $100 strike put for $5.00, and the stock has to fall to $95.00 for you to break even. Below that, you profit dollar-for-dollar. Above it, you lose, up to the amount of the premium.¹

Maximum profit happens in the extreme case where the stock goes to zero. In the example above, that means $95.00 per share, or $9,500 per contract. A stock actually hitting zero is unusual, but the point is that profit expands as the price drops below your break-even.

Maximum loss is the premium and nothing more. If the stock closes at or above $100 at expiration, the put expires worthless and you’re out $500. That fixed downside is the main reason traders use long puts to express a bearish view instead of shorting the stock outright, where losses have no ceiling.

Break-even at expiration: strike price minus premium paid ($100 − $5.00 = $95.00)
Maximum profit per contract: (strike − premium) × 100 shares ($95.00 × 100 = $9,500)
Maximum loss per contract: premium × 100 shares ($5.00 × 100 = $500)

Time Decay Is Always Working Against You

Every day you hold a long put, some of its value erodes just because expiration is one day closer. Traders call this theta. You can be right about direction and still lose money if the stock doesn’t move fast enough to outrun the decay.

Decay is not linear. It accelerates as expiration nears, with the sharpest losses in the final 30 days. An out-of-the-money put with two months left might shed a few cents a day; the same contract two weeks out can bleed at two or three times that rate. This is where most losing long put trades come from: correct thesis, wrong timing, and theta finished the premium off before the stock moved.

You cannot eliminate time decay on a long option. You can dampen it by buying more time upfront (which costs more) or by closing before the last few weeks. If you’re using a long put as insurance on shares you already own, that steady theta is the cost of the hedge.

How to Exit: Sell, Exercise, or Let It Expire

There are three ways out of a long put. Most traders sell.

Sell to Close

A “Sell to Close” order liquidates the position at the current market premium. If the put gained value, you pocket the difference. If it lost value, you take the loss. Settlement is in cash, and you’re done. This is the simplest exit and the most common.

Exercise

Exercising an equity or ETF put means you deliver 100 shares to the assigned writer and receive the strike price times 100 in cash.³ You need to actually own those shares, or be willing to end up short. Shares and cash settle the next business day (T+1). The full process runs under FINRA Rule 2360.⁶ Index puts are different: they settle in cash, paying out the difference between the strike and the index’s settlement value times the multiplier.

Automatic Exercise at Expiration

If your put finishes in the money and you do nothing, the OCC will exercise it automatically through “exercise by exception.” For equity options, the trigger is just $0.01 in the money. The OCC’s deadline for exercise notices is 4:30 p.m. Central Time on expiration day, but brokers set their own earlier cutoffs, so don’t count on the full window.

This catches people. If you hold a put that finishes barely in the money and you don’t want to deliver shares (say, you don’t own the stock and don’t want a short position over the weekend), you have to submit contrary instructions to your broker before their cutoff. Tell your broker what you want on expiration day. Don’t assume the default will match your intent.

Taxes on Long Puts

The IRS treats a long put’s cost as a capital expenditure, not a deductible expense. Whatever you make or lose when you close, exercise, or let the contract expire is a capital gain or loss. Held one year or less, it’s short-term and taxed at ordinary income rates; held longer than a year, it qualifies for long-term rates.⁷ A put that expires worthless produces a capital loss equal to the full premium, with the holding period running from the day after purchase through expiration.

One wrinkle catches stockholders off guard. The IRS generally treats buying a put on stock you own as a short sale for holding-period purposes. If you’ve held the underlying shares for one year or less when you buy the put, any gain on the put is short-term no matter how long you hold the option.⁸

Report options transactions on Form 8949, with totals flowing to Schedule D of Form 1040.⁹ Your broker will send a 1099-B, but check the cost basis. Brokers sometimes get it wrong on options, especially when contracts have been adjusted for stock splits or special dividends.

The Wash Sale Rule Applies to Puts

Sell a stock at a loss and buy a put on the same stock within 30 days (before or after), and the IRS can disallow the loss under the wash sale rule. The statute specifically includes “contracts or options to acquire or sell stock or securities” as substantially identical positions.¹⁰

The disallowed loss is not lost permanently. It gets added to the cost basis of the replacement position, so you recover it when that one closes. But if you were planning to harvest a loss in a specific tax year, an overlapping put purchase will spoil that plan. The 30-day window runs in both directions, so buying the put first and then selling the stock at a loss within 30 days triggers the same result.

1
Fidelity Investments. Long Put – Speculative
2
The Options Clearing Corporation. Long Put – Debt Option KID
3
The Options Clearing Corporation. Equity Options Product Specifications
4
The Options Clearing Corporation. Characteristics and Risks of Standardized Options
5
Financial Industry Regulatory Authority. FINRA Rule 4210 – Margin Requirements
6
Financial Industry Regulatory Authority. FINRA Rule 2360 – Options
7
Internal Revenue Service. Topic No. 409 – Capital Gains and Losses
8
Internal Revenue Service. Publication 550 – Investment Income and Expenses
9
Internal Revenue Service. About Form 8949 – Sales and Other Dispositions of Capital Assets
10
Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities