Can You Change Depreciation Methods From Year to Year?

You can change depreciation methods from year to year, but not the way you’d change a checkbox. Once you’ve depreciated an asset the same way on two consecutive federal returns, the IRS treats that approach as your established method of accounting, and switching to a different method requires the agency’s consent through Form 3115. Some changes are pre-approved and essentially automatic; others require a formal ruling and a user fee. Either way, this is a structured process, not an annual election.

Why Depreciation Isn’t a Free Annual Choice

Depreciation is fundamentally a timing question: it decides how much of an asset’s cost hits this year’s return versus next year’s. If taxpayers could switch methods freely, they could cherry-pick whichever calculation produced the biggest deduction in any given year. The Internal Revenue Code prevents that by requiring the Treasury Secretary’s consent before you compute income under a new accounting method, and the IRS treats depreciation method, recovery period, and convention as accounting methods subject to that rule.¹²

The Two-Return Threshold

The line between a fixable error and a locked-in method is two consecutive tax returns. Treat an asset the same impermissible way on two or more consecutively filed returns and the IRS considers that approach your adopted method for that property.³ Catch the mistake on the very first return and you can generally correct it with an amended return. Miss it that long and you’re in Form 3115 territory.

When You Don’t Need to File Anything Special

Before assuming you need consent, confirm the issue is actually a method change. Several kinds of corrections fall outside the formal process entirely:⁴

Math or posting errors, which you fix on an amended return for any open year.
Changes in underlying facts, such as a contract shift or a change in how an asset is used. Applying your existing method to new facts isn’t a method change.
Adjustments that permanently change lifetime taxable income rather than shifting deductions between years.
Reclassifications that change the character of income (ordinary versus capital) without changing the year it’s reported.

This distinction matters because a real method change triggers a cumulative catch-up calculation across every prior year. Running that machinery for a simple arithmetic slip just complicates the return.

Two Consent Tracks: Automatic and Non-Automatic

Once you’ve confirmed it’s a method change, your next question is which track applies. That decision drives cost, timeline, and scrutiny.

Automatic Consent

Most depreciation corrections qualify for automatic consent, and this is the cheaper, faster path. You file Form 3115, attach it to your timely filed return, and implement the new method. No user fee. No waiting for a ruling.⁵

The current list of pre-approved changes lives in Revenue Procedure 2024-23 and covers many everyday situations:⁶

Switching from an impermissible depreciation method or recovery period to the correct one, if the wrong method was used for at least two consecutive years.
Adjusting depreciation when MACRS property changes use.
Correcting leasehold improvements that were depreciated over the lease term instead of the proper MACRS recovery period.

Cost segregation reclassifications, which move building components into shorter-lived asset classes, also generally fall on the automatic list.

Non-Automatic (Advance) Consent

If your change isn’t on the pre-approved list, you apply directly to the IRS National Office, pay a user fee of $13,900, and wait for a formal letter ruling before implementing the change.⁷ Given the cost and delay, businesses generally reserve this route for unusual asset classifications or complex changes that don’t fit an existing category.

Filing Form 3115

Both tracks use the same form: Form 3115, Application for Change in Accounting Method.⁸ For depreciation changes, you’ll complete Schedule E, which requires the property description, placed-in-service date, current depreciation method, and the method you want to switch to, broken out by asset class and recovery period.⁵

Accuracy is essential. The information on Form 3115 must match your prior returns and fixed asset schedules exactly, which usually means pulling old returns to verify placed-in-service dates, cost basis, and the depreciation you actually claimed. One limitation to keep in mind: Form 3115 cannot fix a wrong placed-in-service date. That’s a separate correction outside the method change process.⁵

Where and When to File

For automatic changes, file the form in duplicate. The original attaches to your timely filed federal return (including extensions) for the year of change. A signed copy goes separately to the IRS at Ogden, UT 84201, no earlier than the first day of the year of change and no later than the date you file the return.⁵

For non-automatic changes, the form must be filed during the tax year for which you’re requesting the change, not after year-end with your return, and it goes to the IRS National Office in Washington, DC, rather than Ogden.⁵ The review can take months, so plan the timing before your year even starts.

The Section 481(a) Catch-Up

The financial heart of a depreciation method change is the Section 481(a) adjustment. It’s the cumulative difference between the depreciation you actually claimed in prior years and the amount you would have claimed had the new method been in place from the start. The adjustment reconciles all those years at once so no deduction gets duplicated or lost.⁹

The direction of the adjustment determines how quickly you feel it:

Negative adjustment (you under-deducted in prior years): the entire catch-up reduces taxable income in the year of change. One lump-sum deduction.¹⁰
Positive adjustment (you over-deducted in prior years): the catch-up increases taxable income, but you spread it evenly over four tax years: the year of change plus the next three.⁵

The asymmetry favors the taxpayer. Missed deductions come back immediately; extra tax gets softened across four years.

Cut-Off Method Instead

Not every change triggers a 481(a) calculation. Some changes use the cut-off method: prior-year depreciation stays as reported, and you apply the new method going forward to whatever basis remains.¹⁰ Changes between two permissible methods typically use a modified cut-off approach; correcting an impermissible method to the right one usually requires the full 481(a) adjustment.⁵

Section 179, Bonus Depreciation, and ADS Have Their Own Rules

Three common depreciation-related choices don’t move through the Form 3115 system, and each has its own reversal rules.

A Section 179 election, where you expense the full cost of qualifying property in the year it’s placed in service, can be revoked without IRS approval. File an amended return for the year within the normal filing window, include the adjustments to taxable income and depreciation, and the revocation is done. Once revoked, though, that revocation is itself irrevocable.¹¹

Bonus depreciation is stickier. When you elect out of bonus depreciation for a class of property, the election covers every asset in that class placed in service during the year. Revoking that election is not generally available; the IRS has permitted it only in limited windows tied to specific tax years.¹² Outside those windows, the election is permanent.

An election to use the Alternative Depreciation System (ADS) instead of the General Depreciation System (GDS) is irrevocable once made for a class of property.² You can’t put that property back on GDS later. Moving the other direction, from GDS to ADS after the initial year, is a change in accounting method requiring Form 3115 and IRS consent.

What Happens If You Just Change Methods on Your Own

Skipping the consent process is worse than doing nothing. When an examiner finds an unauthorized method change, the IRS can force you back to your original method in the year of the switch, and if that year’s statute of limitations has already closed, the reversion moves to the earliest open year instead.¹³

The knock-on effects hurt. An involuntary method change forces the entire 481(a) adjustment, positive or negative, into a single tax year rather than spreading a positive amount over four. Examiners are also instructed to calculate the time-value-of-money benefit you gained by bypassing the consent requirement, which adds to the tax and interest owed.¹³ The formal process has costs and timing burdens. Going around it costs more.

1
Office of the Law Revision Counsel. 26 U.S. Code 446 – General Rule for Methods of Accounting
2
Internal Revenue Service. Publication 946, How To Depreciate Property
3
Internal Revenue Service (IRS). Revenue Procedure 2004-11 – Changes in Accounting Periods and in Methods of Accounting
4
IRS. What Is Not a Method of Accounting
5
Internal Revenue Service. Instructions for Form 3115 – Application for Change in Accounting Method
6
IRS.gov. Rev. Proc. 2024-23 List of Automatic Changes
7
Internal Revenue Service. Bulletin No. 2026-1 – Revenue Procedure 2026-1 Appendix A
8
Internal Revenue Service. About Form 3115, Application for Change in Accounting Method
9
Internal Revenue Service. Form 3115 – Application for Change in Accounting Method
10
IRS. Accounting Method Basics
11
Internal Revenue Service. Instructions for Form 4562
12
Internal Revenue Service. IRS, Treasury Issue Guidance on Making or Revoking the Bonus Depreciation Elections
13
Internal Revenue Service. Changes in Accounting Methods