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See how a realized loss splits across short-term gains, long-term gains, and the $3,000 ordinary-income bucket. Primer: tax-loss harvesting guide.
Quick answer: This calculator applies a loss you type against short-term gains, then long-term gains, then up to the ordinary-income offset the page cites, and carries the rest forward. It estimates tax saved at the rates you type. It does not detect a wash sale.
Losses you type offset short-term gains, then long-term gains, then up to $3,000 of ordinary income ($1,500 if married filing separately) under IRC §1211(b). The rest carries forward. A wash sale under IRC §1091 disallows the loss if you buy substantially identical stock or securities in the 30 days before or the 30 days after. Prices, gains, and rates are what you type. This page does not scrape quotes. 2026 long-term bands are Rev. Proc. 2025-32. Ignores NIIT, AMT, and short-term versus long-term character — Schedule D keeps character; this stack does not. Educational only.
What this means for you: the tax saved is only as good as the rates and the gains you typed. The ordinary offset stops at the cap on the page. A wash sale can disallow a real loss even when this page still shows savings. The page says it ignores NIIT and character the way Schedule D keeps it.
Short-term gains, then long-term gains, then up to the ordinary-income cap the page cites, then carryforward.
The page uses $3,000, or $1,500 if married filing separately, and cites IRC 1211(b). That cap was not changed in this review.
No. The note explains the 30-day window. You have to keep the replacement purchase out yourself.
Educational, not financial advice. Page updated October 24, 2026 — no tax, limit, or rate figure was changed in this review.