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Introduction

SECTION 5. BUSINESS STANDARD

Internal Revenue Bulletin 2008-50 · 2026-10-03 edition · updated 2026-10-04 · United States

MILEAGE RATE

.01 In general . The standard mileage rate for transportation expenses is 55 cents per mile for all miles of use for business purposes.

.02 Use of the business standard mileage rate . A taxpayer may use the business standard mileage rate with respect to an automobile that is either owned or leased by the taxpayer. A taxpayer generally may deduct an amount equal to either the business standard mileage rate times the number of business miles traveled or the actual costs (both fixed and variable) paid or incurred by the taxpayer that are allocable to traveling those business miles.

.03 Business standard mileage rate in lieu of fixed and variable costs . A deduction using the business standard mileage rate is computed on a yearly basis and is in lieu of all fixed and variable costs of the automobile allocable to business purposes (except as provided in section 9.06 of this revenue procedure). Items such as depreciation (or lease payments), maintenance and repairs, tires, gasoline (including all taxes thereon), oil, insurance, and license and registration fees are included in fixed and variable costs for this purpose.

.04 Parking fees, tolls, interest, and taxes . Parking fees and tolls attributable to use of the automobile for business purposes may be deducted as separate items. Likewise, interest relating to the purchase of the automobile as well as state and local personal property taxes may be deducted as separate items, but only to the extent allowable under § 163 or § 164, respectively. Section 163(h)(2)(A) expressly provides that interest is nondeductible personal interest if it is paid or accrued on indebtedness properly allocable to the trade or business of performing services as

an employee. Section 164 expressly provides that state and local taxes that are paid or accrued by a taxpayer in connection with an acquisition or disposition of property are treated as part of the cost of the acquired property or as a reduction in the amount realized on the disposition of the property. If the automobile is operated less than 100 percent for business purposes, an allocation is required to determine the business and nonbusiness portion of the taxes and interest deduction allowable.

.05 Depreciation . For owned automobiles placed in service for business purposes, and for which the business standard mileage rate has been used for any year, depreciation is considered to have been allowed at the rate of 16 cents per mile for 2003 and 2004, 17 cents per mile for 2005 and 2006, 19 cents per mile for 2007, and 21 cents per mile for 2008 and 2009, for those years in which the business standard mileage rate was used. If actual costs were used for one or more of those years, these rates do not apply to any year in which actual costs were used. The depreciation described above reduces the basis of the automobile (but not below zero) in determining adjusted basis as required by § 1016.

.06 Limitations . (1) The business standard mileage rate may not be used to compute the deductible expenses of (a) automobiles used for hire, such as taxicabs, or (b) five or more automobiles owned or leased by a taxpayer and used simultaneously (such as in fleet operations).

(2) The business standard mileage rate may not be used to compute the deductible business expenses of an automobile leased by a taxpayer unless the taxpayer uses either the business standard mileage rate or a fixed and variable rate allowance (FAVR allowance) (as provided in section 8 of this revenue procedure) to compute the deductible business expenses of the automobile for the entire lease period (including renewals). For a lease commencing on or before December 31, 1997, the “entire lease period” means the portion of the lease period (including renewals) remaining after that date.

(3) The business standard mileage rate may not be used to compute the deductible expenses of an automobile for which the taxpayer has (a) claimed depreciation using a method other than straight-line for its estimated useful life, (b) claimed a § 179

December 15, 2008 1288 2008–50 I.R.B.

stantiated by the employee for the computation period, the periodic variable payment must be paid at a rate that does not exceed the rate for that computation period.

(4) Base locality . A base locality is the particular geographic locality or region of the United States in which the costs of driving an automobile in connection with the performance of services as an employee of the employer are generally paid or incurred by the employee. Thus, for purposes of determining the amount of fixed costs, the base locality is generally the geographic locality or region in which the employee resides. For purposes of determining the amount of variable costs, the base locality is generally the geographic locality or region in which the employee drives the automobile in connection with the performance of services as an employee of the employer.

(5) Standard automobile . A standard automobile is the automobile selected by the payor on which a specific FAVR allowance is based.

(6) Standard automobile cost . The standard automobile cost for a calendar year may not exceed 95 percent of the sum of (a) the retail dealer invoice cost of the standard automobile in the base locality, and (b) state and local sales or use taxes applicable on the purchase of the automobile. Further, the standard automobile cost may not exceed $27,200.

(7) Annual mileage . Annual mileage is the total mileage (business and personal) a payor reasonably projects a standard automobile will be driven during a calendar year. Annual mileage equals the annual business mileage divided by the business use percentage.

(8) Annual business mileage . Annual business mileage is the mileage a payor reasonably projects a standard automobile will be driven by an employee in connection with the performance of services as an employee of the employer during the calendar year, but may not be less than 6,250 miles for a calendar year. Annual business mileage equals the annual mileage multiplied by the business use percentage.

(9) Business use percentage . A business use percentage is determined by dividing the annual business mileage by the annual mileage. The business use percentage may not exceed 75 percent. In lieu of demonstrating the reasonableness of the business use percentage based

not deductible, and are not included in the charitable or medical and moving standard mileage rates.

.04 Parking fees, tolls, interest, and taxes . Parking fees and tolls attributable to the use of the automobile for charitable, medical, or moving expense purposes may be deducted as separate items. Interest relating to the purchase of the automobile and state and local personal property taxes are not deductible as charitable, medical, or moving expenses, but they may be deducted as separate items to the extent allowable under § 163 or § 164, respectively.

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