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, and in most cases you can use the automatic consent procedures rather than requesting a private ruling. For tax years beginning in 2026, businesses whose average annual gross receipts over the prior three years do not exceed $32 million generally qualify.¹ The switch involves three steps: confirming you qualify, calculating a transitional Section 481(a) adjustment, and filing Form 3115 with your return.

Confirm You Qualify for the Cash Method

The gatekeeper is the gross receipts test under Internal Revenue Code Section 448. Add up total gross receipts for the three tax years before the year of change, divide by three, and compare against the threshold ($32 million for tax years beginning in 2026). The calculation must include receipts from all related entities, not just the one filing.² Pass, and the IRS classifies you as a small business taxpayer.

Entity-Type Restrictions

C corporations, and partnerships with a C corporation partner, cannot use the cash method unless they meet the small business taxpayer test. Qualified personal service corporations can use cash regardless of revenue. Tax shelters are barred from the cash method entirely, no matter their size.²

If You Carry Inventory

Businesses that produce, buy, or sell merchandise have historically been forced onto the accrual method for those transactions because of the inventory rules. Small business taxpayers can now skip traditional inventory accounting under Section 471(c) and use a simplified method, such as treating inventory as non-incidental materials and supplies (deductible in the later of the year you pay for the goods or the year you deliver them to a customer).³ If you sell merchandise, electing out of traditional inventory rules is usually a prerequisite to running the whole operation on cash.

Calculate the Section 481(a) Adjustment

Switching methods creates overlap. Under accrual, you already reported income on invoices you had not yet collected (accounts receivable) and already deducted bills you had not yet paid (accounts payable). Without a correction, receivables would be taxed a second time when checks arrive on cash, and payables would be deducted a second time when you actually pay them. The Section 481(a) adjustment captures that cumulative difference as of the first day of the year of change.⁴

If receivables exceed payables, the adjustment is positive and increases your taxable income. If payables exceed receivables, the adjustment is negative and reduces it.

How the Adjustment Is Recognized

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

There is a catch. If you stop operating the trade or business during the four-year period, the entire unrecognized balance accelerates into the year you cease operations.⁶ Selling the business, shutting it down, or converting to a different entity structure can trigger this. If you have a large positive adjustment pending and an exit on the horizon, the timing matters.

File Form 3115

Form 3115, Application for Change in Accounting Method, is the actual paperwork. 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, so most filers use the automatic consent procedures.⁷ You do not request permission or wait for a ruling. Consent is deemed given if the form is filed correctly and on time.

How Automatic Consent Filing Works

You file Form 3115 in duplicate:

The original is attached to your timely filed federal income tax return (including extensions) for the year of change.
A signed duplicate copy goes 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 can be mailed or faxed.⁸

On the form you’ll cite Section 15.17 of Rev. Proc. 2024-23 and include the designated change number (DCN) assigned to this change. You’ll also show your Section 481(a) adjustment calculation, the period over which you’ll recognize it, and a statement explaining the factual and legal basis for the change.

Filing late, incompletely, or at the wrong address can void your automatic consent and force you into the slower, more expensive non-automatic process. Check the current Form 3115 instructions for the filing address before you send anything.

If You Do Not Qualify for Automatic Consent

Businesses that fall outside the automatic categories file Form 3115 under the non-automatic procedures. That means filing with the IRS National Office during the tax year for which you want the change to take effect, paying a user fee, and waiting for a letter ruling.⁸ Confirming automatic eligibility before you file is worth the time.

Watch Constructive Receipt Once You’re on Cash

Under the cash method, income counts when you actually or constructively receive it. Constructive receipt is broader than most people expect. 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. A check that arrives December 30 is December income even if you deposit it in January. A merchant account credit posted December 31 is December income regardless of when the funds settle at your bank.

The exception: income is not constructively received if your control over it is subject to substantial limitations or restrictions. A bonus your employer credits but restricts from release until next year, for instance, is not constructively received this year. Getting this line wrong is a common way cash-basis taxpayers end up with income reclassified into an earlier year on audit.

Stay Consistent or Lose the Method

Once you adopt the cash method, you must keep your books on a cash basis and cannot change again without filing another Form 3115. Drifting back into accrual reporting without going through the formal process is an unauthorized change in accounting method. Under Section 446(b), the IRS can then impose a method change on its own terms during an audit, meaning the examiner controls the recognition period on any adjustment and you lose the four-year spread that comes with a voluntary change. Penalties and interest on any resulting underpayment follow.⁵

If your positive Section 481(a) adjustment is being spread over four years, track the balance and include one-fourth on each year’s return. Skipping a year does not erase the income; it just creates an underreporting problem that grows with penalties.

Keep an eye on your rolling three-year gross receipts average. Crossing the $32 million threshold ends your eligibility for the cash method for the following tax year and starts the process in reverse: another Form 3115, another Section 481(a) adjustment, and another round of transition math.²

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