How to apply wash sale loss to repurchased security cost basis

[Aussie]

I purchased 400 shares of X on 4/15/24. I sold 200 of those shares on 7/17/24 for a profit. I then sold the remaining 200 shares on 9/6/24 at a loss. I then repurchased 500 shares of X on 9/24/24 which then created wash sale condition for the 200 shares sold at a loss on 9/6/24.

I then sold the 500 shares of X on 11/6/24 in the morning at a profit. 

I bought another 500 shares of X an hour later and sold those shares in the afternoon on the same day (11/6/24) at a loss.

On 11/13/24 I purchased a series of shares of X throughout the day (100, 200, & 500 shares).

On 11/19/24 I purchased additional 400 shares of X

I then sold all 1200 shares of X on 11/21/24 at a profit.

Later, I purchased additional 500 shares of X on 12/10/24 and additional 50 shares of X on 12/11/24 which I did not sell.

Based on the activity listed above, I have 2 wash sales that were triggered (the 200 shares sold on 9/6/24 and again with the 2nd 500 shares sold on 11/6/24 at a loss.

My question is which repurchase do I apply the wash sale loss to the cost basis for each wash sale that was triggered? Also what is the adjusted acquisition date for each one?

[Mike9241 · Accepted solution]

if you used a US broker they will do the adjusting of the basis and holding period of the shares that created the wash sale. you need to do nothing. If you got a 1099-B then the wash sales issue should be properly reflected

reflected 

one way to tell is to look at what's reported as cost for the 500 shares purchased on 9/24. 200 shares should have a higher tax basis then what you paid due to the wash sale. 

[Aussie]

You are correct. I checked my 1099-B and the wash sale loss is reflected on the cost basis for the subsequent repurchases and I don't need to do anything. I didn't see that before so thank you!!