Wash sales and options: timing, basis and account types

A stock loss may not be deductible immediately if you replace the position within the wash-sale window. Learn how put assignment can trigger the rule, how the deferred loss changes replacement-share basis, and which option situations need individual tax review.

By OptionsKing. Publisher and editorial methods.

Start with two dates: the sale that realizes a loss and any replacement acquisition. For U.S. federal tax purposes, buying substantially identical shares within 30 days before or after the loss sale can defer the deduction. Assignment on a short put counts as a share purchase; the date you sold the put is not the assignment date.

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.

For a replacement in a taxable account, the disallowed loss generally increases the replacement shares' basis and the old holding period carries over. Further replacements can continue the deferral. An IRA or Roth IRA replacement is an important exception: the loss is disallowed without an increase in the IRA's basis.

The wheel trigger, worked

Follow both the cash and the tax basis. The replacement shares cost $886 after their own put premium, but the $113 disallowed stock loss raises their tax basis to $999. That adjustment does not refund cash today; it preserves the deferred loss for a later taxable disposition, subject to any further wash-sale adjustments.

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 unavailable as a deduction on this sale and is now embedded in a $9.99 tax basis. The $8.86 figure is the replacement purchase basis before the wash-sale adjustment, not necessarily the stock's market price.

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. A wheel is not automatically a wash sale: there must be a loss sale and a qualifying replacement inside the window.

Rolling an option at a loss. Wash-sale rules can apply to option losses, but two options are not automatically substantially identical merely because they share an underlying. Closing a short call and writing another is also not the same transaction as buying a replacement option. Keep both contracts' terms and ask your tax preparer to assess the replacement and any straddle rules.

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.

When an option-related replacement needs tax review

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

For an ordinary taxable-account replacement, the issue is usually timing: the basis adjustment can preserve the loss for a later disposition. It need not be only a one-year delay, and IRA replacements do not receive this basis adjustment.

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.

Waiting until after the post-sale window may avoid a new replacement purchase in that window, but you must also check purchases before the sale, other accounts, and other applicable rules. Compare the value of a deduction with the risk of remaining invested or re-entering; do not treat forgone option premium as a guaranteed cost.

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.

Common questions

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.