SECTION 2. BACKGROUND

.01 Change in method of accounting defined.

(1) Section 1.446–1(e)(2)(ii)(a) of the Income Tax Regulations provides that a change in method of accounting includes a change in the overall plan of accounting for gross income or deductions, or a change in the treatment of any material item. A material item is any item that involves the proper time for the inclusion of the item in income or the taking of the item as a deduction. In determining whether a taxpayer’s accounting practice for an item involves timing, generally the relevant question is whether the practice permanently changes the amount of the taxpayer’s lifetime income. If the practice does not permanently affect the taxpayer’s lifetime income, but does or could change the taxable year in which income is reported, it involves timing and is therefore a method of accounting. See Rev. Proc. 91–31, 1991–1 C.B. 566.

(2) Although a method of accounting may exist under this definition without a pattern of consistent treatment of an item, a method of accounting is not adopted in most instances without consistent treatment. The treatment of a material item in the same way in determining the gross income or deductions in two or more consecutively filed tax returns (without regard to any change in status of the method as permissible or impermissible) represents consistent treatment of that item for purposes of § 1.446–1(e)(2)(ii)(a). If a taxpayer treats an item properly in the first return that reflects the item, however, it is not necessary for the taxpayer to treat the item consistently in two or more consecutive tax returns to have adopted a method of accounting. If a taxpayer has adopted a method of accounting under these rules, the taxpayer may not change the method by amending its prior income tax return(s). See Rev. Rul. 90–38, 1990–1 C.B. 57. (3) A change in the characterization of an item may also constitute a change in method of accounting if the change has the effect of shifting income from one period to another. For example, a change from treating an item as income to treating the item as a deposit is a change in method of accounting. See Rev. Proc. 91–31. (4) A change in method of account

ing does not include correction of mathematical or posting errors, or errors in the computation of tax liability (such as errors in computation of the foreign tax credit, net operating loss, percentage depletion, or investment credit). See § 1.446–1(e)(2)(ii)(b).

.02 Securing permission to make a method change. Section 446(e) and § 1.446–1(e) state that, except as otherwise provided, a taxpayer must secure the consent of the Commissioner before changing a method of accounting for federal income tax purposes. Section 1.446–1T(e)(3)(i)(B) requires that, in order to obtain the Commissioner’s consent to a method change, a taxpayer must file a Form 3115, Application for Change in Accounting Method, during the taxable year in which the taxpayer wants to make the proposed change.

.03 Terms and conditions of a method change. Section 1.446–1(e)(3)(ii) authorizes the Commissioner to prescribe administrative procedures setting forth the limitations, terms, and conditions deemed necessary to permit a taxpayer to obtain consent to change a method of accounting in accordance with § 446(e). The terms and conditions the Commissioner may prescribe include the year of change, whether the change is to be made with a § 481(a) adjustment or on a cut-off basis, and the § 481(a) adjustment period.

.04 No retroactive method change. Unless specifically authorized by the Commissioner, a taxpayer may not request, or otherwise make, a retroactive change in method of accounting, regardless of whether the change is from a permissible or an impermissible method. See generally Rev. Rul. 90–38.

.05 Method change with a § 481(a) ad- justment.

(1) Need for adjustment. Section 481(a) requires those adjustments necessary to prevent amounts from being duplicated or omitted to be taken into account when the taxpayer’s taxable income is computed under a method of accounting different from the method used to compute taxable income for the preceding taxable year. When there is a change in method of accounting to which § 481(a) is applied, income for the taxable year preceding the year of change must be determined under the method of accounting that was then employed, and income for