SECTION 9. APPLICATION

.01 If a payor pays a mileage allowance in lieu of reimbursing actual transportation expenses incurred or to be incurred by an employee, the amount of the expenses that is deemed substantiated to the payor is either:

(1) for any mileage allowance other than a FAVR allowance, the lesser of the amount paid under the mileage allowance or the applicable standard mileage rate in section 5.01 of this revenue procedure multiplied by the number of business miles substantiated by the employee; or

(2) for a FAVR allowance, the amount paid under the FAVR allowance less the sum of (a) any periodic variable rate payment that relates to miles in excess of the business miles substantiated by the employee and that the employee fails to return to the payor although required to do so, (b) any portion of a periodic fixed payment that relates to a period during which the employee is treated as not covered by the FAVR allowance and that the employee fails to return to the payor although required to do so, and (c) any optional high mileage payments.

.02 If the amount of transportation expenses is deemed substantiated under the rules provided in section 9.01 of this revenue procedure, and the employee actually substantiates to the payor the elements of time, place (or use), and business purpose of the transportation expenses in accordance with paragraphs (b)(2) (travel away from home) and (b)(6) (listed property, which includes passenger automobiles

2005–51 I.R.B. 1183 December 19, 2005