IRS Form 3115, Application for Change in Accounting Method, is the form you file to ask the IRS for permission to change how you report income or deductions. Most changes qualify for automatic consent, which you get by attaching the form to your tax return with no user fee. Changes that don’t appear on the automatic list require advance consent from the IRS National Office, a user fee of $13,225, and a letter ruling before you can implement the new method.1Internal Revenue Service. About Form 3115, Application for Change in Accounting Method2Internal Revenue Service. Internal Revenue Bulletin 2025-1
Section 446(e) of the Internal Revenue Code requires IRS consent before you change the method you use to compute income, and Form 3115 is the mechanism for getting it.3Office of the Law Revision Counsel. 26 USC 446 General Rule for Methods of Accounting Individuals, C corporations, S corporations, and partnerships all use the same form. Skip it and change methods on your own, and the IRS can force the change during an audit on its own terms, usually with accuracy-related penalties and interest attached.
What Counts as an Accounting Method Change
The form is for changes to timing: how your overall accounting plan works, or how you treat a specific “material item” that affects when income gets recognized or a deduction gets claimed. If you’ve handled an item the same way across multiple tax years, that pattern is your established method, and switching it requires Form 3115.
Common examples:
- Moving from the cash method to accrual, or the reverse.
- Changing inventory valuation, such as FIFO to LIFO.
- Switching from an incorrect depreciation method to the proper one under Section 168.4Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System
- Changing when you recognize revenue.
- Adjusting how you capitalize costs under Section 263A.
Not every return change is a method change. Fixing a math error, a data entry mistake, or a one-time computational error does not require Form 3115. The line is whether the issue involves the timing framework itself or just a mistake applying it.
One point that catches new businesses: picking a method on your first return is an adoption, not a change. You can generally choose any permissible method in year one without filing Form 3115. The form only comes in when you want to switch away from a method you’ve been using. The same first-year rule applies to a new, separate trade or business.
Automatic vs. Non-Automatic Consent
Which track applies is the first thing to nail down, because it controls your deadline, your fee, and whether you wait for a ruling.
Automatic Consent
Most common changes fall here. The procedures live in Revenue Procedure 2015-13, and the current list of qualifying changes is in Revenue Procedure 2024-23.5Internal Revenue Service. Revenue Procedure 2024-236Internal Revenue Service. Revenue Procedure 2015-13 If your change appears on that list, you don’t need a letter ruling. You file the form, use the new method on your return for the year of change, and consent is granted as long as you meet the revenue procedure’s conditions.
The list covers depreciation corrections for tangible property, capitalization changes under Sections 263 and 263A, inventory method changes, revenue recognition timing, and the capitalization and amortization of research and experimental expenditures under Section 174 (designated change number 265). Each entry has its own eligibility conditions, so verify no exclusion applies before assuming you’re clear.
The deadline is straightforward: attach the completed Form 3115 to your timely filed federal income tax return for the year of change, including extensions. No user fee.
Filing under the automatic track also carries audit protection. When the IRS grants your change, it generally agrees not to challenge your use of the old method for years before the year of change.7Internal Revenue Service. Instructions for Form 3115 That protection matters most when you’re correcting an impermissible method, and it has limits: if the item is already under exam, protection generally doesn’t apply unless you fall within a three-month or 120-day window described in the instructions.
Non-Automatic (Advance) Consent
Any change not on the automatic list requires advance consent. You file Form 3115 with the IRS National Office, pay a user fee, and wait for a letter ruling granting permission before you can implement the new method.
The deadline is earlier than most taxpayers expect. You must file with the National Office during the tax year for which you’re requesting the change. For a calendar-year taxpayer wanting to change methods for 2026, the form must reach the National Office before December 31, 2026. Narrow exceptions allow later filing in limited circumstances, but the default is during the year.
The user fee is $13,225 for requests received after February 1, 2025.2Internal Revenue Service. Internal Revenue Bulletin 2025-1 That alone is a reason to check twice whether your change qualifies as automatic. Once you receive a favorable ruling letter, attach a copy of the approved Form 3115 to your return for the year of change.
The Section 481(a) Adjustment
Every method change triggers a Section 481(a) adjustment. When you switch methods, some income or deductions could get counted twice and some could fall through the cracks; the adjustment catches those items so everything gets reported exactly once.8Office of the Law Revision Counsel. 26 U.S. Code 481 – Adjustments Required by Changes in Method of Accounting
You compare what your cumulative taxable income would have been under the new method against what you actually reported under the old method, measured as of the beginning of the year of change. The difference is the adjustment. In a cash-to-accrual switch, the calculation captures accounts receivable earned but not collected (income accrual would have recognized earlier) and accounts payable incurred but not paid (deductions accrual would have recognized earlier). Net those, and you have the adjustment.
The sign of the adjustment controls the timing:
A positive adjustment means the old method understated income or overstated deductions. You owe additional tax. Revenue Procedure 2015-13 lets you spread a positive adjustment ratably over four tax years starting with the year of change, so a $100,000 positive adjustment adds $25,000 to income each year for four years. Certain automatic changes or letter rulings can specify a different period.
A negative adjustment means the old method overstated income or understated deductions. You take the entire benefit in the year of change. Bad news spreads over four years; good news arrives at once.
Filling Out the Form
Before you open the form, settle two things: which consent track applies, and the dollar amount of your Section 481(a) adjustment. With those in hand, the four parts are manageable.
Designated Change Number
Every automatic change on the IRS list has a three-digit Designated Change Number (DCN). Enter it on the form to link your filing to the specific eligibility rules for that change. For example, DCN 265 covers required capitalization and amortization of research and experimental expenditures under Section 174. Non-automatic filings don’t use a pre-assigned DCN.
Part I: Filer Information
Name, taxpayer identification number, address, entity type, and the tax year of the requested change. If you’re filing on behalf of a subsidiary or partnership, the filer and applicant may be different, and you identify both here.
Part II: Change History
Whether you’ve filed Form 3115 before, whether the same item has been under exam, and whether you fall into any eligibility restrictions. Answer carefully. A “yes” on certain questions disqualifies you from automatic consent and pushes you to the non-automatic track.
Part III: Method Details
Describe your current method and your proposed method in plain terms. The IRS wants substantive descriptions of how you actually handle the item, not just code section citations. For a depreciation change, name the assets affected, the recovery period and convention you’ve been using, and what you’re switching to. Vague descriptions are a common reason forms get returned or requests get denied.
Part IV: Section 481(a) Adjustment
The total net adjustment and the period over which it will be recognized: one year for a negative adjustment, four years for a positive adjustment unless the specific change requires otherwise.
Sign the form with someone who can bind the taxpayer: a corporate officer, general partner, or the individual taxpayer. For automatic changes, attach a statement confirming that you agree to all terms and conditions of the applicable revenue procedure.
Where and When to File
The submission mechanics differ by track, and getting them wrong can invalidate an otherwise correct filing.
Automatic Consent
You submit two copies:
- The original is attached to your timely filed federal income tax return, including extensions, for the year of change.
- A duplicate goes to the IRS in Ogden, Utah. It must be filed no earlier than the first day of the year of change and no later than the date you file the original with your return.
The current mailing address for the Ogden copy is Internal Revenue Service, Ogden, UT 84201, Attn: M/S 6111. For private delivery services, use 1973 N. Rulon White Blvd., Ogden, UT 84201, Attn: M/S 6111.9Internal Revenue Service. Where to File Form 3115 The IRS also currently accepts the duplicate by fax under a procedure originally introduced during COVID-19.10Internal Revenue Service. Temporary Procedure to Fax Automatic Consent Forms 3115 Due to COVID-19 Check the IRS “Where to File Form 3115” page for the current submission options before filing.
Non-Automatic Consent
File one copy directly with the National Office at Internal Revenue Service, Attn: CC:PA:LPD:TSS, P.O. Box 7604, Benjamin Franklin Station, Washington, DC 20044.7Internal Revenue Service. Instructions for Form 3115 Non-automatic requests can also be submitted by secure fax or encrypted email. Include the $13,225 user fee. After a favorable ruling letter arrives, attach a copy of the approved Form 3115 to your return for the year of change.
Keep proof of mailing or electronic submission for every copy. If a deadline dispute comes up, the burden is on you to show timely filing.
Small Business Shortcut
If you qualify as a small business taxpayer, two things help. First, businesses with average annual gross receipts at or below the inflation-adjusted threshold over the three prior tax years are exempt from the uniform capitalization rules under Section 263A, which eliminates one of the more common reasons for filing Form 3115 at all. The base threshold is $25 million, adjusted annually; check the current IRS inflation adjustment announcements for the year you need.
Second, qualified small taxpayers are eligible for a reduced Form 3115 filing for certain DCNs, completing only specified lines and schedules. The instructions identify which DCNs qualify, including changes tied to cash-method eligibility, depreciation, and inventory. The substance of the method change and the Section 481(a) adjustment don’t change, but the paperwork gets shorter.
Mistakes That Sink Filings
The most frequent problem is filing under the wrong consent track. If a change requires non-automatic consent and you file as automatic, the IRS rejects it. You’ve lost the year and may have to wait until the next tax year to restart. Verify your change against the current list in Revenue Procedure 2024-23 before assuming automatic consent applies.
Other recurring pitfalls:
- Forgetting the Ogden duplicate. Both copies are required for automatic consent; filing only with your return leaves the submission incomplete.
- Vague method descriptions in Part III. “Changed depreciation method” without the assets, recovery periods, and conventions invites a rejection or a request for more information.
- Wrong Section 481(a) math. If the number is off, the IRS may recalculate it on less favorable terms. Double-check the cumulative difference as of the first day of the year of change.
- Filing during an active audit on the same item. Automatic consent eligibility tightens; you may need to fall within a three-month or 120-day window to qualify.
The user fee on the non-automatic side is over $13,000 and a letter ruling can take months, so the cost of a wrong filing is real. For complex changes or large Section 481(a) adjustments, working with a tax professional experienced with Form 3115 is usually worth the fee.