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Introduction

SECTION 8. FIXED AND VARIABLE

Internal Revenue Bulletin 2003-43 · 2026-10-03 edition · updated 2026-10-04 · United States

RATE ALLOWANCE

.01 In general .

.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 operating and fixed) paid or incurred by the taxpayer that are allocable to traveling those business miles.

.03 Business standard mileage rate in lieu of operating and fixed costs . A deduction using the standard mileage rate for business miles is computed on a yearly basis and is in lieu of all operating and fixed 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 operating and fixed 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 will be 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 will be considered to have been allowed at the rate of 14 cents per mile for

2000, 15 cents per mile for 2001 and 2002, and 16 cents per mile for 2003 and 2004, for those years in which the business standard mileage rate was used. If actual costs were used for one or more of those years, the rates above will not apply to any year in which the costs were used. The depreciation described above will reduce 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 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 deduction, or (c) used the Accelerated Cost Recovery System (ACRS) under former § 168 or the Modified Accelerated Cost Recovery System (MACRS) under current § 168. By using the business standard mileage rate, the taxpayer has elected to exclude the automobile (if owned) from MACRS pursuant to § 168(f)(1). If, after using the business standard mileage rate, the taxpayer uses actual costs, the taxpayer must use straight-line depreciation for the automobile’s remaining estimated useful life (subject to the applicable depreciation deduction limitations under § 280F).

(4) The business standard mileage rate and this revenue procedure may not be used to compute the amount of the deductible automobile expenses of an employee of the United States Postal Service

October 27, 2003 926 2003-43 I.R.B.

base locality is generally the geographic locality or region in which the employee resides. For purposes of determining the amount of operating 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 $28,100.

(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 on records of total mileage and business mileage driven by the employees annually, a payor may use a business use percentage that is less than or equal to the following percentages for a FAVR allowance that is paid for the following annual business mileage:

(1) The ordinary and necessary expenses paid or incurred by an employee in driving an automobile owned or leased by the employee in connection with the performance of services as an employee of the employer will be deemed substantiated (in an amount determined under section 9 of this revenue procedure) when a payor reimburses those expenses with a mileage allowance using a flat rate or stated schedule that combines periodic fixed and variable rate payments that meet all the requirements of section 8 of this revenue procedure (a FAVR allowance).

(2) The amount of a FAVR allowance must be based on data that (a) is derived from the base locality, (b) reflects retail prices paid by consumers, and (c) is reasonable and statistically defensible in approximating the actual expenses employees receiving the allowance would incur as owners of the standard automobile.

.02 Definitions . (1) FAVR allowance . A FAVR allowance includes periodic fixed payments and periodic variable payments. A payor may maintain more than one FAVR allowance. A FAVR allowance that uses the same payor, standard automobile (or an automobile of the same make and model that is comparably equipped), retention period, and business use percentage is considered one FAVR allowance, even though other features of the allowance may vary. A FAVR allowance also includes any optional high mileage payments; however, optional high mileage payments are included in the employee’s gross income, are reported as wages or other compensation on the employee’s Form W–2, and are subject to withholding and payment of employment taxes when paid. See section 9.05 of this revenue procedure. An optional high mileage payment covers the additional depreciation for a standard automobile attributable to business miles driven and substantiated by the employee for a calendar year in excess of the annual business mileage for that year. If an employee is covered by the FAVR allowance for less than the entire calendar year, the annual business mileage may be prorated on a monthly basis for purposes of the preceding sentence.

(2) Periodic fixed payment . A periodic fixed payment covers the projected fixed costs (including depreciation (or lease payments), insurance, registration and license fees, and personal property taxes) of driving the standard automobile in connection with the performance of services as an employee of the employer in a base locality, and must be paid at least quarterly. A periodic fixed payment may be computed by (a) dividing the total projected fixed costs of the standard automobile for all years of the retention period, determined at the beginning of the retention period, by the number of periodic fixed payments in the retention period, and (b) multiplying the resulting amount by the business use percentage.

(3) Periodic variable payment . A periodic variable payment covers the projected operating costs (including gasoline and all taxes thereon, oil, tires, and routine maintenance and repairs) of driving a standard automobile in connection with the performance of services as an employee of the employer in a base locality, and must be paid at least quarterly. The rate of a periodic variable payment for a computation period may be computed by dividing the total projected operating costs for the standard automobile for the computation period, determined at the beginning of the computation period, by the computation period mileage. A computation period can be any period of a year or less. Computation period mileage is the total mileage (business and personal) a payor reasonably projects a standard automobile will be driven during a computation period and equals the retention mileage divided by the number of computation periods in the retention period. For each business mile substantiated 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

2003-43 I.R.B. 927 October 27, 2003

Annual business mileage Business use percentage

6,250 or more but less than 10,000 45 percent

10,000 or more but less than 15,000 55 percent

15,000 or more but less than 20,000 65 percent

20,000 or more 75 percent

(10) Retention period . A retention period is the period in calendar years selected by the payor during which the payor expects an employee to drive a standard automobile in connection with the performance of services as an employee of the employer before the automobile is replaced. The

period may not be less than two calendar years.

(11) Retention mileage . Retention mileage is the annual mileage multiplied by the number of calendar years in the retention period.

(12) Residual value . The residual value of a standard automobile is the projected

Retention period Residual value

2-year 70 percent

3-year 60 percent

4-year 50 percent

amount for which it could be sold at the end of the retention period after being driven the retention mileage. The Service will accept the following safe harbor residual values for a standard automobile computed as a percentage of the standard automobile cost:

payments and the periodic variable payments made to an employee driving 80 percent of the annual business mileage of the standard automobile does not exceed the amount obtained by multiplying 80 percent of the annual business mileage of the standard automobile by the applicable business standard mileage rate for that year (under section 5.01 of the applicable revenue procedure).

(4) The depreciation included in each periodic fixed payment portion of a FAVR allowance paid with respect to an automobile will reduce the basis of the automobile (but not below zero) in determining adjusted basis as required by § 1016. See section 8.07(2) of this revenue procedure for the requirement that the employer report the depreciation component of a periodic fixed payment to the employee.

.05 FAVR allowance limitations . (1) A FAVR allowance may be paid only to an employee who substantiates to the payor for a calendar year at least 5,000 miles driven in connection with the performance of services as an employee of the employer or, if greater, 80 percent of the annual business mileage of that FAVR allowance. If the employee is covered by the FAVR allowance for less than the entire calendar year, these limits may be prorated on a monthly basis.

.03 FAVR allowance in lieu of operating and fixed costs .

(1) A reimbursement computed using a FAVR allowance is in lieu of the employee’s deduction of all the operating and fixed costs paid or incurred by an employee in driving the automobile in connection with the performance of services as an employee of the employer, 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, license and registration fees, and personal property taxes are included in operating and fixed costs for this purpose.

(2) Parking fees and tolls attributable to an employee driving the standard automobile in connection with the performance of services as an employee of the employer are not included in fixed and operating costs and may be deducted as separate items. Similarly, interest relating to the purchase of the standard automobile may be deducted as a separate item, but only to the extent that the interest is an allowable deduction under § 163.

.04 Depreciation . (1) A FAVR allowance may not be paid with respect to an automobile for which the employee has (a) claimed depreciation using a method other than straight-line for its

estimated useful life, (b) claimed a § 179 deduction, or (c) used the Accelerated Cost Recovery System (ACRS) under former § 168 or the Modified Accelerated Cost Recovery System (MACRS) under current § 168. If an employee uses actual costs for an owned automobile that has been covered by a FAVR allowance, the employee must use straight-line depreciation for the automobile’s remaining estimated useful life (subject to the applicable depreciation deduction limitations under § 280F).

(2) Except as provided in section 8.04(3) of this revenue procedure, the total amount of the depreciation component for the retention period taken into account in computing the periodic fixed payments for that retention period may not exceed the excess of the standard automobile cost over the residual value of the standard automobile. In addition, the total amount of the depreciation component may not exceed the sum of the annual § 280F limitations on depreciation (in effect at the beginning of the retention period) that apply to the standard automobile during the retention period.

(3) If the depreciation component of periodic fixed payments exceeds the limitations in section 8.04(2) of this revenue procedure, that section will be treated as satisfied in any year during which the total annual amount of the periodic fixed

October 27, 2003 928 2003-43 I.R.B.

allowance that fails to meet one or more of the requirements of section 8 of this revenue procedure, the employee may not be treated as covered by any FAVR allowance of the payor during the period of the failure. Nevertheless, the expenses to which that mileage allowance relates may be deemed substantiated using the method described in sections 5, 9.01(1), and 9.02 of this revenue procedure to the extent the requirements of those sections are met.

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▸Contents — Internal Revenue Bulletin 2003-43

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