TradersForge Journal

Wash Sale Calculator

Enter a sale-at-loss date to see the full 30-day wash sale window (both before and after) and the earliest safe re-entry date. Optionally enter your planned re-entry date to check whether it would trigger.

Trade dates

The date you sold at a realized loss.

When you\'re considering buying the same security again. Leave blank to just see the window dates.

How the rule works: The IRS wash sale rule (Section 1091) disallows the loss if you buy a substantially-identical security within 30 calendar days BEFORE or AFTER the sale at a loss. The disallowed loss gets added to the new position\'s cost basis (deferred, not lost).

Wash sale window

Wash sale window
Any purchase of a substantially-identical security between Tue, Apr 14, 2026 and Sat, Jun 13, 2026 would trigger a wash sale on the Thu, May 14, 2026 loss.
Earliest safe re-entry
Any purchase on or after Sun, Jun 14, 2026 avoids triggering the wash sale on this loss.

Wash sales tracked automatically — every trade, every import.

TradersForge applies Section 1091 detection on every imported equity and option trade. The trade detail page shows the disallowed amount with a link to the replacement that triggered it. Year-to-date deferred losses by ticker on the analytics page. No more April 15 surprises.

Start free trialRead the full wash sale guide →

FAQ

What is the wash sale rule's 30-day window?
IRS Section 1091 disallows a loss deduction if you buy a substantially-identical security within 30 calendar days BEFORE or AFTER the sale that produced the loss. So the "wash sale window" is actually 61 calendar days centered on the sale date — 30 days back and 30 days forward. Most calculators only check the forward window; ours checks both.
Are wash sale days counted as calendar days or business days?
Calendar days. Section 1091 uses 30 calendar days exactly — weekends and holidays count. So if you sell at a loss on a Friday, the wash sale window includes the following Saturday and Sunday.
When is the earliest I can re-enter without triggering a wash sale?
31 calendar days after the sale at a loss. The 30-day window is INCLUSIVE — day 30 still triggers. Day 31 is the first safe day. The calculator shows this date explicitly.
Does the wash sale rule apply if I buy options instead of stock?
Generally yes. Options on the same underlying as a stock you sold at a loss are typically treated as substantially identical for wash sale purposes. So selling AAPL stock at a loss and buying AAPL calls within 30 days triggers a wash sale on the stock loss. See our wash sale guide for the full rules.
What about futures and crypto?
Most futures (Section 1256 contracts) are NOT subject to the wash sale rule — losses are recognized immediately. Crypto wash sale treatment has been evolving; most accountants currently treat crypto as not subject, but this could change. This calculator is most useful for stocks and options.
How does TradersForge track wash sales automatically?
On every imported trade, TradersForge applies wash sale logic based on the 30-day window and same-ticker matching. The analytics page shows year-to-date deferred losses per ticker and flags trades that triggered wash sales in real time. Useful for year-end tax planning instead of discovering wash sales on your 1099-B.

This calculator provides general informational guidance based on Section 1091 of the Internal Revenue Code. It is NOT tax advice. Consult a qualified tax professional for your specific situation.