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1/3 business use of 39000 FMV when put to business use = business tax basis = 13000 less depreciation 1262 = 11738

proceeds 32500 * 1/3 = 10833

10833 - 11738 -905 loss 

 

10725 is 1/3 of 32175

 

when a personal asset is put to business use the tax basis for business is the lower of cost or Fair Market Value. in your case, FMV is lower so that is used for business deprecition, gain or loss

 

for your personal portion 

you cost less 13000 = tax basis of personal portion

sales price 2/3 of 32500 = 21667 - tax basis of personal portion, if loss it's a non-deductible personal loss. if a gain it's taxable

 

not sure how you came up with 1/3 business use. 

 

business use once converted would be business miles divided by total mileage.

 

hope you kept records of nusiness mileage .