The short answer: In the cash vs accrual accounting decision, most venture-backed startups should keep their books on accrual and treat the tax method as a separate choice. A C corporation can file on the cash method only while its 3-year average gross receipts stay at or under $32 million (2026 threshold).
- Cash basis records income when money arrives; accrual records it when it is earned.
- Investors, lenders, and auditors read accrual statements, because GAAP is an accrual framework.
- A cash tax method defers tax only for a profitable company; a loss-making startup gains close to nothing.
- Switching the tax method later requires IRS approval on Form 3115.
Last updated November 2026.
Founders usually meet this question twice. The first time is at incorporation, when someone asks which method the first tax return will use. The second is before a raise, when an investor asks for accrual financials the company never kept.
Those are two different decisions. One governs the management books, which drive board reporting and diligence. The other governs the tax return, which the IRS lets eligible companies file on cash. This guide separates the two, shows the rules, and runs the numbers on what the tax choice is actually worth.
Cash vs accrual accounting: which should a startup use?
For the books, accrual, once the company has annual contracts, vendor terms, or outside investors. For the tax return, cash is often allowed and sometimes useful, but the benefit depends on being profitable.
Cash basis works for a company with simple revenue and nobody outside reading the numbers. It maps to the bank statement and takes little effort. The trouble starts when revenue is billed upfront or costs arrive after the work is done. Then each month’s profit reflects payment timing rather than the business.
Accrual basis fixes that by tying revenue and cost to the period they belong to. Revenue on subscription and service contracts follows ASC 606, which is an accrual standard. A Series A investor will read gross margin and net burn from accrual statements, so books kept on cash eventually get rebuilt.
What is the difference between cash basis and accrual basis accounting?
The difference is timing. Both methods record the same transactions; they assign them to different periods.
IRS Publication 538 states it directly: “Under the cash method, you generally report income in the tax year you receive it, and deduct expenses in the tax year in which you pay the expenses.” Under the accrual method, it continues, “you generally report income in the tax year you earn it, regardless of when payment is received.”
| Factor | Cash basis | Accrual basis |
|---|---|---|
| Revenue recorded | When the customer pays | When the revenue is earned |
| Expenses recorded | When the company pays | When the cost is incurred |
| Matches GAAP | No | Yes |
| Balance sheet carries receivables and payables | No | Yes |
| Tax eligibility for a C corporation | Average gross receipts at or under $32 million (2026) | Always permitted |
| Monthly bookkeeping effort | Lower | Higher: accruals, deferrals, prepaid schedules |
| Best fit | Pre-revenue or simple, founder-read books | Annual contracts, vendor terms, investors, lenders |
For a line-by-line view of how the same transactions land differently each month, see accruals and cutoff before a raise.
When are businesses required to use accrual accounting?
For federal tax, three kinds of entity generally cannot use the cash method. Publication 538 lists them: a corporation other than an S corporation, a partnership with such a corporation as a partner, and a tax shelter as defined in section 448(d)(3).
The first two groups have an exception. A corporation or partnership that is not a tax shelter can use the cash method if it meets the gross receipts test. Under Rev. Proc. 2025-32, the test for taxable years beginning in 2026 is average annual gross receipts of no more than $32,000,000 over the prior 3 taxable years. Publication 538 still prints the older $26 million base figure, which is indexed for inflation each year.
Crossing the line has a hard consequence. Per Publication 538, an entity that fails the test “must change to an accrual method of accounting, effective for the tax year in which the entity fails to meet this test,” and must file Form 3115. The tax-shelter category has no size exception, so loss-making LLCs should confirm with their preparer whether section 448(d)(3) reaches them.
Outside the tax code, the requirement comes from readers. GAAP statements, audits, and most loan covenants assume accrual books.
Can a startup keep accrual books and file taxes on the cash method?
Often, yes, if the company is eligible. Many companies keep accrual management books and convert to cash at year-end for the return.
Publication 538 sets the guardrails. “You choose an accounting method when you file your first tax return,” and a later change from cash to accrual, or back, requires IRS approval. The method must also be applied the same way from year to year. On Form 1120, Schedule M-1 reconciles income per books with income per return, which is where the conversion shows up.
The practical cost is a year-end conversion entry set: remove receivables, payables, accrued expenses, and deferred revenue to reach cash-basis taxable income. A tidy accrual close makes that a short exercise. A messy one makes it a reconstruction. For the full sequence of moving the books themselves, see startup accounting by funding stage.
What is the cash tax method actually worth to a startup?
Only the timing of tax on a profitable year. The method never changes total income; it moves receivables and payables into the next year.
Consider an illustrative Delaware C corporation with $4,100,000 in 2026 gross receipts, well under the $32,000,000 average. At December 31 it has $310,000 of earned but uncollected receivables and $95,000 of incurred but unpaid expenses. Accrual taxable income is higher by $310,000 minus $95,000, or $215,000.
If the company is profitable, that gap carries real money. IRS Publication 542 says corporations figure tax “by multiplying taxable income by 21%,” so the cash method defers $215,000 times 21%, or $45,150, into 2027. The deferral reverses as those receivables are collected.
Now run the same balance sheet with a $1,600,000 net loss. Accrual shows the $1,600,000 loss; cash shows $1,815,000. Neither year produces federal income tax, so the current-year saving is $0. For most venture-backed startups burning cash, the tax method is a minor decision. The book method is the one investors will test.
When should a startup switch its books from cash to accrual?
Before an outside reader depends on the numbers. In practice that means 2 or 3 closed accrual quarters before a priced round, a bank facility, or a first audit.
Common triggers include annual contracts billed upfront, net-30 or net-60 vendor terms, a board that reviews monthly results, and payroll or commissions that straddle month-end. Any one of these makes cash-basis profit misleading for the months it touches.
Debit & Co. closes client books on accrual through the Continuous Close Method™, with deferral and prepaid schedules maintained monthly rather than rebuilt for diligence. Aaron Ressel reviews each close package before it reaches a client. The tax method stays a separate call made with the company’s tax preparer. For the cost of letting a cash-basis file run too long, see QuickBooks Online vs outsourced bookkeeping.
Frequently asked questions
Should a startup use accrual basis accounting?
For its books, usually yes, once it has annual contracts, vendor terms, or outside investors. Accrual statements are what investors, lenders, and auditors read. The tax return is a separate choice, and an eligible startup may still file on the cash method.
When are businesses required to use accrual accounting?
For federal tax, a C corporation or a partnership with a C corporation partner must use accrual once its 3-year average gross receipts exceed $32 million for 2026. A tax shelter must use accrual at any size. GAAP statements and audits require accrual regardless.
Can an S corporation or LLC use the cash method?
Generally, yes. Publication 538 does not list S corporations or partnerships without a C corporation partner among the excluded entities, unless they qualify as a tax shelter under section 448(d)(3).
How much tax does the cash method save?
It defers tax rather than eliminating it, and only for a profitable year. In one illustrative case, $215,000 of net receivables at a 21% corporate rate deferred $45,150 into the next year. A loss-making startup saves close to nothing.
Do you need IRS approval to switch from cash to accrual?
Yes. Publication 538 lists a change from the cash method to an accrual method, or the reverse, as a change that requires IRS approval. The request is made on Form 3115.
Sources: IRS Publication 538, Accounting Periods and Methods; IRS Rev. Proc. 2025-32, section 3.30; IRS Publication 542, Corporations. The company, gross receipts, receivables, accrued expenses, and loss figures are illustrative.
