Wash-Sale Rules for U.S. Options

For educational purposes only; not investment advice.

Direct answer

U.S. federal wash-sale rules can disallow a current loss when stock or securities are sold at a loss and substantially identical property, or a contract or option to acquire it, is acquired during the period from 30 days before through 30 days after the sale. IRS Publication 550 also states that the rules apply to losses from sales or trades of contracts and options to acquire or sell stock or securities.

That is a 61-day review window, not merely 30 days after the sale. Whether two different options or an option and another position are substantially identical can depend on all facts and circumstances. Symbol, underlying, strike, expiration, Delta, or economic similarity alone is not a universal safe-harbor test.

How the rule changes tax records

For a taxable-account replacement, the disallowed loss is generally added to the replacement property’s cost basis, postponing recognition until a later taxable disposition:

adjusted replacement basis = replacement cost + disallowed loss

The replacement holding period generally includes the holding period of the disposed property. Partial replacement quantities require matching and partial disallowance. Purchases by a spouse or controlled corporation may also matter. Losses and replacements across brokers and accounts must therefore be reviewed together.

If an individual’s IRA or Roth IRA acquires substantially identical property within the window, IRS Revenue Ruling 2008-5 says the taxable-account loss is disallowed and the IRA basis is not increased. Do not assume every disallowed loss is merely deferred.

Broker reporting is not the complete legal test. Publication 550 explains that Form 1099-B wash-sale reporting generally covers specified same-account, same-identifier transactions, but a taxpayer cannot deduct a wash-sale loss merely because the broker did not report it. Form 8949 instructions use code W and a positive adjustment in column (g) for a nondeductible wash-sale loss.

Example

Assume a taxpayer closes an option for $1,000 after paying $3,000, realizing a $2,000 loss. Ten days later, a replacement option costs $1,500. If, after reviewing the contracts and circumstances, the replacement is determined to be substantially identical and the full loss is disallowed, its adjusted basis would be:

$1,500 + $2,000 = $3,500

This arithmetic does not decide whether the two options are substantially identical; that classification is the key tax judgment. If only part of the disposed exposure is replaced, only the matched portion may be affected. A purchase before the loss sale can also trigger the rule, so checking only later trades is insufficient.

Practical risks and scope

Keep trade dates, tax lots, quantities, option terms, exercises, assignments, expirations, and transfers across all accounts.
Review stock-to-option, option-to-stock, rolled options, spouse accounts, controlled entities, and IRA/Roth IRA activity rather than relying on one broker screen.
Straddle, constructive-sale, Section 1256, dealer, employee-option, and non-U.S.-taxpayer rules can change the analysis.
A wider strike or later expiration is not automatically outside the rule; facts-and-circumstances analysis remains necessary.
Tax software may not reconcile different brokers or determine whether economically related contracts are substantially identical.
Tax status and law can change. Use the current-year IRS materials and a qualified U.S. tax professional for an actual return.

Common misconceptions

“Waiting 30 calendar days after the sale is the entire test.” Acquisitions in the 30 days before the sale also count, and date counting should be checked for the actual trades.

“No broker adjustment means no wash sale.” Broker information reporting can be narrower than the taxpayer’s obligation.

“A disallowed loss is always recovered later.” An IRA or Roth IRA replacement covered by Revenue Ruling 2008-5 does not receive the basis increase.