Not tax advice · last updated 25 October 2026

Tax-loss harvesting estimator

review with a tax pro. The loss number does not change when a wash-sale rule might apply.

Economic loss is proceeds minus basis. IRC section 1091 disallows certain losses on stock or securities when a substantially identical position is acquired during the period beginning 30 days before the sale and ending 30 days after. A June 2023 Joint Committee on Taxation pamphlet says digital assets are not expressly in section 1091. The 2025 Schedule D instructions say wash sales generally apply to digital assets that are also stock or securities, such as tokenized securities. The 2026 Form 1099-DA instructions for box 1i say a broker reports wash-sale loss disallowed for a tokenized security treated as a stock or security under section 1091, for the same account and the same CUSIP, and that cross-account reporting is optional.

Plain bitcoin is not that instrument. This worksheet computes no wash-sale adjustment for bitcoin or for a tokenized security. If you mark a tokenized security and a repurchase inside the window, the page flags that section 1091 could disallow the loss. It still does not change the number.

The full worksheet is launching at $29 per tax year, one-time, not a subscription. The preview is free. Open the worksheet.