Title 26 › Subtitle Subtitle A— Income Taxes › Chapter 1— NORMAL TAXES AND SURTAXES › Subchapter O— Gain or Loss on Disposition of Property › Part VII— WASH SALES; STRADDLES › § 1091
You cannot claim a tax loss on selling stocks or securities if you bought, or agreed to buy, the same or almost the same stock within 30 days before or after the sale. The only exception is if you are a dealer in stocks and the loss happened in the normal course of that business. "Stock or securities" also covers contracts or options to buy or sell stocks. If you bought less than you sold, or you bought as much or more, the Treasury will make rules to decide exactly which shares are affected. If the loss is disallowed and you now own replacement shares, your tax cost for those shares will be the old shares’ cost adjusted by the difference between the prices you bought and sold at. The same 30-day rule and adjustments apply to losses on closing short sales or similar futures contracts. The rule still applies even if the contract can be settled in cash or other property.
Full Legal Text
Internal Revenue Code — Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 1091
Title 26 — Internal Revenue Code
Last Updated
Apr 5, 2026
Release point: 119-73not60