How to Change from Accrual to Cash Basis on Your Tax Return

To change from accrual to cash basis on your tax return, you file IRS Form 3115 (Application for Change in Accounting Method) under the automatic consent procedure, attach it to your timely filed return for the year of change, send a signed duplicate to the IRS National Office, and report a Section 481(a) adjustment that reconciles the two methods. For tax years beginning in 2026, your business generally qualifies if its average annual gross receipts over the prior three years are $32 million or less.¹

Confirm You Qualify

The gatekeeper for cash-method eligibility is the gross receipts test under Internal Revenue Code Section 448. Add your total gross receipts for the three tax years before the year of change, divide by three, and compare the result to the inflation-adjusted threshold ($32 million for tax years beginning in 2026). Receipts from related entities count, not just the entity filing.² Businesses that pass are called small business taxpayers in IRS terminology.

Entity type matters too. C corporations and partnerships that have a C corporation as a partner can only use the cash method if they clear the gross receipts test. Qualified personal service corporations can use the cash method regardless of revenue. Tax shelters, as defined by reference to Section 461(i)(3), are barred from the cash method no matter how small.²

If You Carry Inventory

Businesses that produce, buy, or sell merchandise historically had to use accrual for purchases and sales because of inventory rules. Small business taxpayers can now elect out of traditional inventory accounting under Section 471(c) and instead use a simplified method, such as treating inventory as non-incidental materials and supplies deductible in the later of the year paid or the year delivered to a customer.³ Without that election, the inventory requirement will keep you partially on accrual even if you otherwise qualify.

Calculate Your Section 481(a) Adjustment

Changing methods creates overlap. Under accrual, you already reported income on invoices sent but not yet collected, and you already deducted bills received but not yet paid. Switch to cash with no adjustment and you would be taxed again when the receivables are collected, and you would deduct the same expenses a second time when the payables are paid. The Section 481(a) adjustment captures that cumulative difference as of the first day of the year of change.⁴

In practice, net your outstanding accounts receivable against your outstanding accounts payable (and any other items that would otherwise be counted twice or missed). If receivables exceed payables, the adjustment is positive and increases taxable income. If payables exceed receivables, it is negative and decreases taxable income.

How the Adjustment Is Recognized

A negative adjustment is taken entirely in the year of change, so the tax benefit lands immediately. A positive adjustment is spread evenly over four tax years, beginning with the year of change.⁵ A $100,000 positive adjustment adds $25,000 to taxable income each year for four years.

One trap worth knowing: if you cease operating the trade or business during the four-year spread, the entire remaining balance accelerates into the year operations end.⁶ Selling, shutting down, or converting entity structure can all trigger acceleration. If you expect an exit and have a large positive adjustment pending, the timing of the method change matters.

File Form 3115

The change from an overall accrual method to an overall cash method for small business taxpayers is listed as an automatic change under Section 15.17 of Rev. Proc. 2024-23.⁷ Automatic consent means the IRS is treated as having given the Commissioner’s consent once the form is filed correctly and on time; there is no user fee and no waiting for a private ruling.

File Form 3115 in duplicate. Attach the original to your timely filed federal income tax return (including extensions) for the year of change. Send a signed duplicate copy to the IRS National Office at the address listed in the Form 3115 instructions no later than the date you file the return; the duplicate may be mailed or faxed.⁸ On the form, reference Section 15.17 of Rev. Proc. 2024-23, include the designated change number (DCN) for this change, show your Section 481(a) adjustment calculation and the period over which you will recognize it, and provide the factual and legal basis for the change.

Filing late, filing incompletely, or sending the duplicate to the wrong address can void automatic consent and push you into the non-automatic procedure, which requires paying a user fee, filing during the year of change, and waiting for a letter ruling from the IRS National Office.⁸ Check the current Form 3115 instructions for the filing address before you submit.

Watch Constructive Receipt After the Switch

Once you are on the cash method, income is reported when actually or constructively received. Under Treasury Regulation 1.451-2, income is constructively received when it is credited to your account, set apart for you, or otherwise made available so you could draw on it. You do not need the cash in hand.

A check that arrives in December is December income even if you deposit it in January. A payment credited to your merchant account on December 31 is December income regardless of when it transfers to your bank. The exception: income is not constructively received if your control over it is subject to substantial limitations or restrictions. Misreading this line is one of the fastest ways to get an IRS adjustment that pulls income into an earlier year.

Keep the Method or Change It Properly

After the switch, the IRS expects consistency. Keep your books and records on a cash basis going forward, and do not change again without filing another Form 3115 and getting consent. Drifting back into accrual-style reporting without going through the process is an unauthorized change in accounting method and gives the IRS grounds to force you back and assess penalties and interest.⁵

If your Section 481(a) adjustment is positive, track the remaining balance and report one-fourth each year. Skipping a year does not erase the income; it creates underreporting that compounds with penalties when the IRS catches up.

Monitor your rolling three-year average gross receipts. If it crosses the $32 million threshold, you lose cash-method eligibility and generally must switch back to accrual for the following tax year, which means another Form 3115 and another Section 481(a) adjustment running the other direction.²

The reason to file Form 3115 even though it is paperwork: when the IRS initiates the method change on audit instead of you initiating it voluntarily, the examiner controls the terms. You lose the four-year spread on a positive adjustment, lose full year-one recognition of a negative adjustment, and the IRS can recalculate prior open years with penalties and interest layered on top.⁵ The form is cheaper than the alternative.

1
Internal Revenue Service. Rev. Proc. 2025-32
2
Office of the Law Revision Counsel. 26 U.S. Code 448 – Limitation on Use of Cash Method of Accounting
3
eCFR. 26 CFR 1.471-1 – Need for Inventories
4
Office of the Law Revision Counsel. 26 U.S. Code 481 – Adjustments Required by Changes in Method of Accounting
5
Internal Revenue Service. Internal Revenue Manual 4.11.6 – Changes in Accounting Methods
6
Internal Revenue Service. Rev. Proc. 2015-13
7
Internal Revenue Service. Rev. Proc. 2024-23
8
Internal Revenue Service. Instructions for Form 3115