Is my trade a wash sale under IRS rules?
Use this wash sale rule checker to screen whether selling an investment at a loss and buying the same or substantially identical security near the sale date may disallow the loss. It focuses on the 30-day window before and after the loss sale.
wash sale rule checker
Quick answer
A wash sale can occur when you sell at a loss and buy the same or substantially identical security within 30 days before or after the sale. The loss is usually disallowed and added to basis.
Also answers
- wash sale calculator
- 30 day wash sale rule
- disallowed loss calculator
- stock loss wash sale
Good fit when
- Checking loss trades before tax-loss harvesting
- Reviewing repurchase timing
- Avoiding disallowed capital losses
Have ready
- Loss sale date and amount
- Replacement purchase dates
- Security and account details
Result you get
Wash-sale risk flag, affected window, and disallowed-loss note.
How this calculation works
- Checks for repurchases within 30 days before or after a loss sale.
- Flags potential disallowed losses under wash sale rules.
- Estimates how the loss may adjust cost basis.
Common mistakes and caveats
- Substantially identical securities can trigger wash sale rules.
- This tool is a screening estimate; confirm with tax records.
FAQ
Does a wash sale eliminate the loss forever?
No. The disallowed loss is generally added to the basis of the replacement shares.
TaxGuide Pro provides free state and federal tax calculators for individuals, freelancers, and small businesses.