The wash sale rule and option selling

A wash sale is selling stock at a loss and acquiring substantially identical stock within 30 days either side. The loss is not lost: it moves into the basis of the replacement shares and the old holding period comes with it. Premium sellers trigger it constantly without noticing, because assignment on a put is a purchase of shares.

The rule is four items long and the fourth one is not about options at all. Here it is, verbatim.

What the publication says

IRS Publication 550 (2025), Wash Sales states that a wash sale occurs when you sell or trade stock or securities at a loss and within 30 days before or after the sale you:

1. Buy substantially identical stock or securities,
2. Acquire substantially identical stock or securities in a fully taxable trade,
3. Acquire a contract or option to buy substantially identical stock or securities, or
4. Acquire substantially identical stock for your individual retirement arrangement (IRA) or Roth IRA.

Two things follow that matter to anyone selling premium.

The window runs both ways. Thirty days before and thirty days after, so the replacement purchase can precede the loss sale. A 61-day window in total.

The loss is deferred, not destroyed. The publication is explicit: "add the disallowed loss to the cost of the new stock or securities," and "Your holding period for the new stock or securities includes the holding period of the stock or securities sold." You get the deduction when you finally exit the replacement position.

The wheel trigger, worked

From the running book. WBD, 100 shares from an assignment, tax basis $9.88, which is the $10 strike less the $0.12 put premium. The stock is $8.75 and you sell to take the loss before year end.

This is item 1 on the list, not some exotic reading of item 3. Assignment on a short put is buying 100 shares. It is a purchase, it is substantially identical stock, and it lands inside the window. The loss is gone for this year and sitting in the basis of shares you now hold at $9.99 while they trade at $8.86.

At an assumed 32 percent marginal rate the deferral is worth about $36 of tax this year on a position that size. On 500 shares the disallowed loss is $565 and the deferral is $181. The mechanism does not care about the size; your planning does.

Where premium sellers walk into it

Three patterns, all ordinary.

Wheeling the same ticker. This is the whole strategy: sell a put, take assignment, sell calls, get called away, sell another put on the same name. Any leg of that which realizes a loss and is followed within 30 days by another assignment on the same ticker is a wash sale. The cycle itself is the trigger.

Rolling a covered call in December. Buying back a call at a loss and selling another is a loss on a security followed by acquiring a contract on the same underlying. The publication states that "The wash sale rules apply to losses from sales or trades of contracts and options to acquire or sell stock or securities," so option-to-option is inside the rule's reach.

Harvesting a loss and buying a call. The cleanest item 3. Sell the shares at a loss, buy a call on the same name within 30 days, and you have acquired an option to buy substantially identical stock. Disallowed.

The case nobody can resolve for you

Sell shares at a loss, then write a cash-secured put on the same name. Not buy a call. Write a put.

Read item 3 again: "Acquire a contract or option to buy substantially identical stock or securities." You did not acquire an option. You granted one, and what you took on is an obligation to buy if somebody exercises against you. That is not the same thing as acquiring a contract to buy, and Publication 550 does not address it.

You will find confident answers to this on both sides. The economically-substantive argument is that a deep in-the-money short put is nearly certain to deliver the shares and is functionally a purchase. The textual argument is that the list says "acquire" and a writer does not acquire. Both are reasonable and neither is in the publication.

So this page will not tell you. What it will tell you is that the exposure is real, that it is decided by facts the publication does not spell out, and that if you are harvesting a material loss in December on a name you are still wheeling, that is a question for whoever signs your return, asked before you place the trade rather than in April.

Two things that make it less painful

It is a deferral, so the stakes are timing. A disallowed loss raises your basis, so you get it back on the eventual exit. The cost is the use of the deduction for a year, not the deduction.

Different tickers are different securities. The publication: "Ordinarily, stocks or securities of one corporation are not considered substantially identical to stocks or securities of another corporation." Two semiconductor names that fell 23 percent together in the same cycle are not substantially identical, however similarly they trade. That is why correlation is a risk problem and not a tax problem.

One thing that does not help: waiting 31 days looks tidy and stops the wheel dead for a month on your largest position. Whether that costs more than the deferred deduction is arithmetic you can do, and on the worked position it plainly does.

This page explains mechanics and quotes the IRS publication it takes them from. It is not tax advice, it does not know your bracket, your state, your filing status or your other positions, and one sentence in your own situation can change the answer. Take the worked examples to whoever prepares your return.

OptionsKing scores every candidate strike on a deterministic 0 to 100 scale, blends that score with the return on the capital the trade ties up, and shows you the highest-ranked handful. There is no minimum score. How it works covers what the ranking does and does not tell you.

Questions people actually ask

Sources

• IRS Publication 550 (2025), Wash Sales
• OCC, Characteristics and Risks of Standardized Options

Rules and thresholds above were checked against these documents on August 4, 2026. Exchange and broker rules change. Confirm anything you are about to act on with your own broker.

Keep reading

• How the basis got to $9.88 in the first place
• What happens when the shares finally go
• The position that produced this loss

Do the math on your own trade

• Wheel strategy calculator what the position becomes after assignment.
• Cash-secured put calculator credit, break-even, return on secured capital, annualized.
• Roll analyzer is rolling this position actually worth it.

Every price in this article is an illustrative worked example, not a quote. Read Taxes for sellers for the rest of the series, and the disclaimer before you act on any of it. Selling options carries real risk of loss, and the loss can be far larger than the premium you collected.