Vehicles are "listed property." As such, business usage must be >50% in order to be able to deduct the pro-rata share of all operating expenses, including depreciation. Furthermore, any business income tax credits are only available to the extent that the vehicle is used >50% for business.
Accordingly in your situation, your business will not be able to take the pro-rata share of operating expenses or the Section 30D credit. I cannot recall any situation where the Code allows a Solomon-like decision to split the baby.
It all boils down to that fact that you will receive the $7,500 credit against your personal income tax liability. I do not understand what the fuss is all about trying to get the credit to come through one's business, because that decision makes everybody's life more difficult. Tax prep fees increase, taxpayer record keeping increases, and the back door surprises like depreciation recapture and Section 179 recapture make for unhappy taxpayers.
I have been cranking out income taxes for a lot of people and businesses over the years. I used to keep a journal years ago that compared the deductions for utilizing the standard mileage rate as opposed to using the actual method. The results seemed to reflect that over a five-year period the income tax savings were negligible. This was primarily due to the fact that most business usage claimed was 70-80%. They were greatest of course in the first two years and then dropping in year three. Moreover, as I mentioned above, there are traps embedded into the Code that can be expensive to the uninformed. I personally believe that the income tax benefits derived by owning a vehicle in one's business are more illusory than real.
Business ownership makes great sense when the vehicle is garaged at the workplace and is used 100% for business by the owner and employees. I have some clients who have this sort of operation, and we utilize this approach.
