I'll admit to not being an accountant;
read the text direct from the IRS:
"Exceptions:
Qualified property does not include:
Property placed in service and disposed of in the same tax year;
Property converted from business or income-producing use to personal use in the same tax year it is acquired;"
"If you used listed property more than 50% in a qualified business use in the year you placed the property in service, and used it 50% or less in a later year, you may have to include as income part of the depreciation deducted in prior years."
"5-year property includes:
Automobiles.
Light general purpose trucks."
"For automobiles and other vehicles, determine this percentage by dividing the number of miles the vehicle is driven for trade or business purposes or for the production of income during the year (not to include any commuting mileage) by the total number of miles the vehicle is driven for all purposes"
"A policy statement that prohibits personal use (except for commuting) is not available if the commuting employee is an officer, director, or 1% or more owner."
"A truck or van is a qualified nonpersonal use vehicle only if it has been specially modified with the result that it is not likely to be used more than a de minimis amount for personal purposes. For example, a van that has only a front bench for seating, in which permanent shelving has been installed, that constantly carries merchandise or equipment, and that has been specially painted with advertising or the company's name, is a vehicle not likely to be used more than a de minimis amount for personal purposes. "
http://www.irs.gov/instructions/i4562/ch02.html#d0e3005"If you traded in your vehicle, you basis is the adjusted basis of the old vehicle plus any additional amount you paid for the new vehicle"
Example:
Cost inc. taxes...................$25,000
Adjusted basis of trade-in... -$3,000
Section 179 Basis.............$22,000"
http://www.section179.org/2011_Instructions_for_Form_2106.pdfI could be reading all this wrong, but I don't really see a way of interpreting all that which would allow you to buy a new SUV every year and deduct the full amount without acknowledging the existence of the one you bought the previous year. Unless you are collecting them all in a garage somewhere, and rotate through which one you use (for non-commuting business purposes).
I have seen accountants be overly generous with their clients (overly as in technically illegal) before, and the IRS still gives you the fine, not the accountant, so personally, I feel better reading the text myself than trusting a "professional"