SECTION 3. BACKGROUND AND

CHANGES

.01 Section 162(a) allows a deduction for all the ordinary and necessary expenses paid or incurred during the taxable year in carrying on any trade or business. Under that provision, an employee or self-employed individual may deduct the cost of operating an automobile to the extent that it is used in a trade or business. However, under § 262, no portion of the cost of operating an automobile that is attributable to personal use is deductible.

.02 Section 274(d) provides, in part, that no deduction is allowed under § 162 with respect to any listed property (as defined in § 280F(d)(4) to include passenger automobiles and any other property used as a means of transportation) unless the taxpayer complies with certain substantiation requirements. Section 274(d) further provides that regulations may prescribe that some or all of the substantiation requirements do not apply to an expense that does not exceed an amount prescribed by the regulations.

.03 Section 1.274–5(j), in part, grants the Commissioner of Internal Revenue the authority to establish a method under which a taxpayer may use mileage rates

to substantiate, for purposes of § 274(d), the amount of the ordinary and necessary expenses of using a vehicle for local transportation and transportation to, from, and at the destination while traveling away from home.

.04 Section 1.274–5(g), in part, grants the Commissioner the authority to prescribe rules relating to mileage allowances for ordinary and necessary expenses of using a vehicle for local transportation and transportation to, from, and at the destination while traveling away from home. Pursuant to this grant of authority, the Commissioner may prescribe rules under which the allowances, if in accordance with reasonable business practice, will be regarded as (1) equivalent to substantiation, by adequate records or other sufficient evidence, of the amount of the travel and transportation expenses for purposes of § 1.274–5(c), and (2) satisfying the requirements of an adequate accounting to the employer of the amount of the expenses for purposes of § 1.274–5(f).

.05 Section 62(a)(2)(A) allows an employee, in determining adjusted gross income, a deduction for the expenses allowed by Part VI (§ 161 and following), subchapter B, chapter 1 of the Code, paid or incurred by the employee in connection with the performance of services as an employee under a reimbursement or other expense allowance arrangement with a payor.

.06 Section 62(c) provides that an arrangement will not be treated as a reimbursement or other expense allowance arrangement for purposes of § 62(a)(2)(A) if it—

(1) does not require the employee to substantiate the expenses covered by the arrangement to the payor, or

December 6, 2004 899 2004–49 I.R.B.

.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 15 cents

of the allowance that relates to miles of travel not substantiated.

.08 Section 1.62–2(h)(2)(i)(B) provides that if a payor pays a mileage allowance under an arrangement that meets the requirements of § 1.62–2(c)(1), the portion, if any, of the allowance that relates to miles of travel substantiated in accordance with § 1.62–2(e), that exceeds the amount of the employee’s expenses deemed substantiated for the travel pursuant to rules prescribed under § 274(d) and § 1.274–5(g), and that the employee is not required to return, is subject to withholding and payment of employment taxes. See §§ 31.3121(a)–3, 31.3231(e)–1(a)(5), 31.3306(b)–2, and 31.3401(a)–4 of the Employment Tax Regulations. Because the employee is not required to return this excess portion, the reasonable period of time provisions of § 1.62–2(g) (relating to the return of excess amounts) do not apply to this excess portion.

.09 Under § 1.62–2(h)(2)(i)(B)(4), the Commissioner may, in his or her discretion, prescribe special rules regarding the timing of withholding and payment of employment taxes on mileage allowances.

.10 Section 5.06(1) of this revenue procedure revises the limitation on simultaneous use of multiple automobiles to allow a taxpayer using up to four vehicles simultaneously to use the standard mileage rate.