SECTION 2. SUMMARY OF
Internal Revenue Bulletin 2005-51 · 2026-10-03 edition · updated 2026-10-04 · United States
STANDARD MILEAGE RATES
.01 Standard mileage rates
(1) Business (section 5 below) 44.5 cents per mile
(2) Charitable contribution (section 7 below)
(a) General 14 cents per mile
(b) Hurricane Katrina deduction 32 cents per mile
(c) Hurricane Katrina reimbursement 44.5 cents per mile
(3) Medical and moving (section 7 below) 18 cents per mile
§ 303 of the Katrina Emergency Tax Relief Act of 2005, Pub. L. No. 109–73, 119 Stat. 2016 (KETRA). The Hurricane Katrina charitable contribution reimbursement standard mileage rate is established by § 304 of KETRA.
.02 Determination of standard mileage rates . The business, medical, and moving standard mileage rates reflected in this revenue procedure are based on an annual study of the fixed and variable costs of operating an automobile conducted on behalf
of the Service by an independent contractor. The charitable contribution standard mileage rate is provided in § 170(i) of the Internal Revenue Code. The Hurricane Katrina charitable contribution deduction standard mileage rate is established by
2005–51 I.R.B. 1177 December 19, 2005
.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 provide special rules regarding the timing of withholding and payment of employment taxes on mileage allowances.
.10 Section 303 of KETRA provides that the standard mileage rate for purposes of computing the amount allowable as a charitable contribution deduction for the cost of operating an automobile for the provision of relief related to Hurricane Katrina during the period beginning on August 25, 2005, and ending on December 31, 2006, shall be 70 percent of the business standard mileage rate in effect. Section 304 of KETRA provides that taxpayers may exclude from income an amount computed at the business standard mileage rate received from a charity as reimbursement for the cost of operating an automobile for the provision of relief related to Hurricane Katrina during the period beginning on August 25, 2005, and ending on December 31, 2006. Sections 2.01 and 7.01 of this revenue procedure are revised to include these special charitable contribution standard mileage rates for 2006. For the period beginning on August 25, 2005, and ending on August 31, 2005, the charitable contribution standard mileage rate is 29 cents for deduction purposes and 40.5 cents for reimbursement purposes. For the period beginning on September 1, 2005, and ending on December 31, 2005, the charitable contribution standard mileage rate is 34 cents
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