should my my crypto futures trading fees (like 'funding fee' and 'margin fee' etc) be included in my realized P&L (cost basis)?from Koinly report, they are not.

[drcode]

Koinly stated: we do not include these fees in your cost basis calculations because the IRS may not allow these deductible costs.

But based on my research: Include all trading fees and funding fees into the calculation of your crypto gains and losses (adjusting cost basis or proceeds). Thoughts?  And not sure how to fix the upload of this yet if I'm right.

[DavidD66]

It isn't hard to find postings making the case that funding fees and margin costs should be included in cost basis, but I've not been able to find anything authoritative that allows it. I think you can make a better argument for including funding fees; My personal opinion is that they should be included in cost basis.  Margin interest is an investment expense and is‌ potentially deductible on Schedule A, and shouldn't be included in cost basis.  That said, I recommend that if you are going to use Koinly you follow their lead.  If you were audited, you wouldn't want your supporting documentation (your Koinly reports) to not agree with your tax return.  

[drcode]

Ok.  Thanks!  But, to make matters worse, Koinly put the 'trading fees' in the 'margin fee' tag.  I know that has to be wrong!  So, not sure how I'll get the 'trading fees' to apply to my P&L.   Maybe have to use a different tool?  Or just accept the way they did it?  Or include all the fees into the P&L. 

[drcode]

But, you have found that 'trading fees' should definitely be included in any and all crypto cost basis, correct?  (including futures trading)

based on my research, all trading fees (crypto, stock, etc) should be included in cost basis.