United States / Guides / Cash vs Accrual Accounting: What Each Method Actually Changes
United States · guideCash vs Accrual Accounting: What Each Method Actually Changes
The short answer
The cash method records revenue and expenses when money actually moves; the accrual method records them when the transaction is earned or incurred, regardless of when cash changes hands. Most small businesses may choose either method for tax purposes, but IRC section 448 bars C corporations, partnerships with a C corporation partner, and tax shelters from the cash method once average annual gross receipts cross a threshold that is adjusted for inflation each year — $32,000,000 for tax years beginning in 2026. The method used on a tax return is a formal election: switching it later generally requires the company's CPA to file Form 3115 with the IRS rather than simply changing how the books are kept.
Key facts — verified dates on each
The same invoice, recorded twice — the difference in one example
A services company delivers work in December, sends an invoice for $20,000, and the client pays it in January. Under the cash method, that $20,000 is December revenue if the check arrived in December, or January revenue if it arrived in January — the date on the invoice is irrelevant to when it hits the books. Under the accrual method, the $20,000 is recorded as revenue in December, the month the work was completed and the company earned the right to be paid, with a corresponding accounts receivable entry that clears when the cash actually arrives in January.
The same logic runs in reverse for expenses. A bill for a December service that the company pays in January is a January expense under the cash method and a December expense under accrual, recorded as accounts payable until it is paid. Neither method changes how much cash eventually moves — both a cash-basis and an accrual-basis company collect the same $20,000 and pay the same bill. What changes is which month's financial statements and which year's tax return show the transaction.
That timing difference compounds across a full set of books. A company with meaningful accounts receivable, accounts payable, prepaid expenses, or deferred revenue will show a materially different picture of profitability in any given month depending on which method it uses, even though the underlying cash flow is identical over a long enough period.
Who is actually allowed to use the cash method
For tax purposes, the cash method is available to most businesses by default — but IRC section 448(a) bars three categories from using it regardless of size: C corporations, partnerships that have a C corporation as a partner, and tax shelters (a defined term under section 461(i)(3) that includes certain syndicates where more than 35% of losses are allocated to limited partners or limited entrepreneurs). A C corporation or a partnership with a C corporation partner can still qualify for an exception to that bar by meeting the section 448(c) gross receipts test — average annual gross receipts for the three tax years ending with the prior tax year at or below a threshold that is adjusted for inflation each year.
Two further carve-outs exist independent of the gross receipts test. A qualified personal service corporation — broadly, a C corporation substantially all of whose activity is in fields like health, law, engineering, accounting, or consulting, and substantially owned by employees performing those services — is treated as an individual for section 448 purposes and is not barred from the cash method on account of being a C corporation. A qualifying farming business is likewise excepted from the general bar.
Inventory used to force accrual accounting on any business that sold goods, but section 471(c) now lets a business that meets the same section 448(c) gross receipts test either treat inventory as non-incidental materials and supplies or conform to its own financial-accounting treatment of inventory, while still using the cash method for everything else. That change is why a small e-commerce or product business, not just a services business, can often stay on the cash method even though it carries inventory.
What investors and lenders actually expect to see
A company's tax accounting method and the financial statements it shows outside parties are two separate things, and they frequently diverge. A venture-backed startup or a company negotiating a bank facility is typically asked for financial statements prepared on an accrual basis — matching revenue to the period it was earned and expenses to the period they were incurred — because that is the basis on which GAAP financial statements are built and the basis diligence teams and loan covenants are usually written against. A cash-basis income statement can make a company with strong bookings and slow-paying customers look weaker than it is, and can make a company that just collected a large receivable look stronger than its underlying trend supports.
It is common, and permitted, for a company to file its tax return on the cash method while producing accrual-basis financial statements for its board, its investors, or a lender — the tax election governs the return filed with the IRS; it does not dictate the format of internal or investor-facing reporting. Doing that in practice requires bookkeeping that tracks accounts receivable, accounts payable, and any deferred revenue or prepaid expense balances even though the tax books do not need those entries, so the two views can be reconciled rather than kept as separate, disconnected sets of numbers.
A company that expects to raise a priced round, take on institutional debt, or eventually pursue a review or audit of its financials should expect that expectation to surface early in diligence, and is better positioned when its books have been tracking accrual-basis detail consistently rather than reconstructing it retroactively from bank statements.
Why the choice is made with the CPA, not decided unilaterally
The accounting method used on a federal tax return is a formal election, not a preference that can be changed from one filing to the next. Once a method is adopted on a filed return, changing it — cash to accrual or accrual to cash — generally requires the IRS's consent, obtained by filing Form 3115, Application for Change in Accounting Method. That filing, the analysis of whether the company is even eligible for the method it wants to move to, and the resulting adjustment to taxable income are determinations for the company's CPA, not a bookkeeping decision made independently of tax filings.
The gross receipts test itself carries traps that are easy to misjudge without a CPA's review: aggregation rules can require combining the gross receipts of related entities under common control when testing the threshold, which matters for a company with a subsidiary, an affiliated entity, or a corporate group structure. A company that assumes it qualifies for the cash method based on its own standalone revenue, without checking whether an aggregation rule applies, can end up having filed on a method it was never eligible to use.
Because the method also interacts with inventory treatment under section 471(c), R&D expensing under section 174A, and how revenue is recognized for purposes unrelated to cash flow, a change that looks like a bookkeeping simplification can have tax consequences the company's CPA needs to model before it is made, not after a return has already been filed on the new basis.
What switching actually involves, mechanically
A change from cash to accrual (or the reverse) is filed as an "overall method" change on Form 3115. Most such changes, made by an eligible taxpayer following the IRS's automatic change procedures, are treated as approved on filing — the company does not wait for an individual IRS ruling before adopting the new method, though the filing is still subject to review. A method change generally requires computing a section 481(a) adjustment: a one-time calculation of the cumulative difference between what taxable income would have been under the old method versus the new method, which is then spread into income (or as a deduction) over a period set by the applicable revenue procedure rather than taken all at once in the year of change.
Practically, the switch is not just a re-labeling of the same numbers. Moving to accrual means building out accounts receivable and accounts payable subledgers that did not previously need to exist for tax purposes, establishing a cutoff process at each period-end so revenue and expenses land in the right period, and reconciling those balances consistently going forward. Moving from accrual to cash means the reverse — the company can stop tracking those subledgers for tax purposes, though many companies that make this move keep them anyway for internal or investor reporting, as described above.
CapEasy's bookkeeping support maintains the ledger detail — receivables, payables, and period cutoffs — that either method needs, and keeps it consistent whichever basis the company's tax return uses; deciding whether a company is eligible to change methods, computing the section 481(a) adjustment, and preparing and filing Form 3115 are done by the company's CPA.
The figures, and when we checked them
These numbers change by year or by notification. Each one shows the date we last verified it against the source — if that date looks old, check the source before relying on it.
Questions on this
What is the basic difference between cash and accrual accounting?
The cash method records revenue and expenses when money is actually received or paid. The accrual method records revenue when it is earned and expenses when they are incurred, regardless of when the cash moves, using accounts receivable and accounts payable to track the gap between the two.
Can a small business choose either method?
Most small businesses can. The main legal restriction under IRC section 448 applies to C corporations, partnerships with a C corporation partner, and tax shelters, which are barred from the cash method unless they meet the section 448(c) gross receipts test or qualify for the farming or qualified-personal-service-corporation exception.
What is the gross receipts threshold for 2026?
For tax years beginning in 2026, the section 448(c) test is met if average annual gross receipts for the prior three tax years do not exceed $32,000,000. The figure is adjusted for inflation annually, so it should be checked against the current year's IRS revenue procedure rather than assumed to carry forward.
Does carrying inventory force a business onto the accrual method?
Not automatically. Section 471(c) lets a business that meets the section 448(c) gross receipts test either treat inventory as non-incidental materials and supplies or follow its own financial-accounting treatment of inventory, while still using the cash method for the rest of its books.
If our tax return uses the cash method, can we still produce accrual financial statements for investors?
Yes. The tax method election governs the return filed with the IRS; it does not dictate the format of financial statements shown to a board, investors, or a lender. Many companies file cash-basis returns while maintaining accrual-basis books for outside reporting, which requires tracking receivables, payables, and deferred items even though the tax return does not need them.
What do investors and lenders typically expect to see?
Accrual-basis financial statements are the norm for institutional diligence and loan covenants, because they match revenue to the period it was earned rather than the period cash arrived. A company that expects to raise a priced round or take on institutional debt is generally better positioned when its books already track accrual-basis detail consistently.
Can a company just start using a different method next year if it wants to?
No. Once a method is used on a filed tax return, changing it generally requires the IRS's consent, obtained by filing Form 3115. This is a formal accounting method change, not a bookkeeping preference, and is prepared and filed by the company's CPA.
What is a section 481(a) adjustment?
It is the one-time calculation, required when a method change is made, of the cumulative difference between what taxable income would have been under the old method versus the new method. Rather than being taken all at once, that adjustment is spread into income or as a deduction over a period set by the applicable IRS revenue procedure.
Do related entities or a corporate group structure affect the gross receipts test?
They can. Aggregation rules can require combining the gross receipts of related entities under common control when applying the section 448(c) test, which matters for a company with a subsidiary or affiliated entity structure. Whether aggregation applies to a particular structure is a determination for the company's CPA, not something to assume from one entity's standalone revenue.
Who decides whether to switch accounting methods?
The company's CPA determines eligibility for the method being sought, computes the section 481(a) adjustment, and prepares and files Form 3115. Bookkeeping support maintains the receivables, payables, and period-cutoff detail either method needs, but does not make or file the method-change determination itself.
Primary sources
- IRS Publication 538 — Accounting Periods and Methods
- 26 U.S.C. 448 — Limitation on use of cash method of accounting (Legal Information Institute, Cornell Law School)
- IRS — Revenue Procedure 2025-32 (2026 annual inflation adjustments)
- IRS — Instructions for Form 3115, Application for Change in Accounting Method
- 26 U.S.C. 471 — General rule for inventories (Legal Information Institute, Cornell Law School)
Last reviewed 2026-08-14. Statutes and schedules change — the sources above are authoritative, this page is orientation.
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