For federal tax purposes, an LLC choosing between the cash method and the accrual method of accounting is usually free to pick cash if its average annual gross receipts stay at or below $32 million for 2026, and must use accrual if it exceeds that threshold, is classified as a tax shelter, or is taxed as a C corporation that doesn’t qualify for the small-taxpayer exception. You lock in the method on your first return, and changing it later takes IRS consent.
How Your LLC Is Taxed Decides What’s Available
The choice has nothing to do with state law and everything to do with how the IRS classifies the LLC.
- A single-member LLC is a disregarded entity by default. Income and expenses go on Schedule C, and either method is generally available so long as it clearly reflects income.
- A multi-member LLC defaults to partnership treatment on Form 1065. Cash is available unless a C corporation is a partner or the LLC exceeds the gross receipts threshold.
- An LLC that elects S corporation status on Form 2553 follows the same rules as a partnership.
- An LLC that elects C corporation treatment on Form 8832 is barred from cash under Section 448 of the Internal Revenue Code unless it passes the gross receipts test.
Section 448 flatly prohibits three categories of taxpayers from using cash: C corporations, partnerships with a C corporation partner, and tax shelters. The gross receipts test is the escape hatch for the first two.
What the Cash Method Does
Under cash-basis accounting, income is reported when you actually receive payment and expenses are deducted when you actually pay them. A $5,000 project finished in December but paid in January lands on next year’s return. A December bill paid in January is deducted in the later year.
Because tax reporting tracks cash flow directly, the cash method is the usual pick for service-based LLCs. It also gives owners some control over year-end taxable income. Delaying an invoice a few days can push income into the next tax year, and prepaying a deductible expense before December 31 can pull a deduction into the current one.
Constructive Receipt Limits the Timing Game
You can’t ignore money you could have collected. Under the constructive receipt doctrine, income counts as received when it’s credited to your account or made available to you without substantial restriction, whether or not you actually deposit it. A check that arrives in December is taxable in December even if you hold it until January. Telling a client to sit on payment doesn’t move the income; the IRS looks at when you had the right to the funds.
What the Accrual Method Does
Accrual accounting ties income and expenses to when they’re earned or owed, not when cash moves. Income is recognized when your right to receive it is fixed and the amount can be reasonably determined, which usually means when you deliver the service or ship the product. Expenses are deducted when the obligation to pay is established.
The same $5,000 project and a December insurance bill would both hit the current year’s return under accrual, even if the cash arrives or leaves in January. That produces a more accurate picture of a period’s performance, but it also means owing tax on income earned but not yet collected, and tracking receivables, payables, and accrued liabilities year-round.
When Accrual Is Mandatory
The $32 Million Gross Receipts Test
For tax years beginning in 2026, the threshold is $32 million in average annual gross receipts over the three prior tax years. Cross that line, and cash is off the table the following year. The figure is adjusted annually for inflation from the $25 million base set by the Tax Cuts and Jobs Act.
Receipts from related entities under common ownership are aggregated for the test. Short tax years are annualized, and an LLC that hasn’t been around for three years uses whatever period it has.
For an LLC taxed as a C corporation, or a partnership with a C corporation partner, passing this test is the only thing keeping cash available.
The Inventory Rule Isn’t What It Used to Be
Before 2018, LLCs that sold physical products and carried significant inventory were generally forced onto accrual. The Tax Cuts and Jobs Act changed that. Any taxpayer that meets the $32 million gross receipts test can now use cash even with inventory, and can treat inventory as non-incidental materials and supplies, deducting the cost when items are used or sold rather than tracking cost of goods sold under full accrual principles.
If your LLC sells products but averages under $32 million, holding inventory does not by itself require accrual.
Tax Shelter Classification
Section 448 also bars any entity classified as a tax shelter from using cash, and here there’s no dollar escape. The statutory definition is broader than it sounds. It includes any “syndicate,” meaning a partnership or non-C-corporation entity where more than 35 percent of losses during the year flow to limited partners or limited entrepreneurs. A multi-member LLC set up so passive investors absorb most of the losses can fall into this category and lose cash-method access no matter how small it is.
Locking In the Method on Your First Return
You adopt an accounting method simply by using it on your LLC’s first federal tax return. No application, no advance IRS approval. Whatever method you file under becomes your established method.
From that point on, consistency is required. You apply the method the same way every year, and it must clearly reflect income. Under Section 446, if the IRS decides your method distorts income, it can recompute taxable income using whatever method it considers appropriate.
Changing Methods Later
Once a method is established, switching takes IRS consent. The vehicle is Form 3115, Application for Change in Accounting Method, and you file it whether the change is voluntary or forced by crossing the gross receipts threshold.
Automatic vs. Non-Automatic Consent
Many common changes qualify for automatic consent under the IRS’s published list, currently Rev. Proc. 2025-23. Switching from cash to accrual after exceeding the gross receipts test, or adopting the small-taxpayer inventory exception, are both automatic. You attach a completed Form 3115 to a timely filed return for the year of change. No National Office submission, no user fee.
Changes off the automatic list require a non-automatic consent request. Form 3115 goes to the IRS National Office with a user fee, and you wait for a determination.
The Section 481(a) Adjustment
Any method change creates transition items that would otherwise be double-counted or dropped. The Section 481(a) adjustment is a one-time calculation that captures the cumulative difference between what you reported under the old method and what you would have reported under the new one.
A switch from cash to accrual, for instance, pulls previously untaxed accounts receivable into income through the adjustment. That can be a large number. Under Rev. Proc. 2015-13, positive adjustments (those that raise taxable income) are spread ratably over four tax years: the year of change and the next three. Negative adjustments are taken entirely in the year of change.
What Happens If You Use the Wrong Method
Using a method your LLC doesn’t qualify for isn’t a paperwork issue. If the IRS finds the mismatch during an audit, it can recompute taxable income under whatever method it decides clearly reflects income, generating additional tax plus interest running from the original due date.
On top of that, the IRS can impose a 20 percent accuracy-related penalty on the underpayment where the shortfall stems from negligence or disregard of the rules. Section 446(f) specifically says that failing to file Form 3115 to request a change cannot be used to reduce or avoid penalties. Not knowing you needed to switch is not a defense.
Over several years of exposure, interest and penalties can outstrip the underlying tax. An LLC that suspects it’s using the wrong method is almost always better off filing Form 3115 proactively than waiting to be caught.