Cash vs. Accrual Accounting: Which Method Fits Your Business?

Most owners meet this question the first time a lender or a new bookkeeper asks whether the books are cash or accrual, and realize they are not sure. It is really two questions. One is how you keep your books month to month, which decides whether your profit and loss statement tells the truth. The other is which method you file your tax return under, which decides when income and deductions land on the return. The two answers do not have to match, and for many businesses they should not.

How each method works

The cash method

Under the cash method you record income when the money arrives and expenses when the money leaves. An invoice you send in March and collect in May is May revenue. A vendor bill you receive in December and pay in January is a January expense. IRS Publication 538 puts it plainly: you report income in the tax year you receive it and deduct expenses in the tax year you pay them.

Two wrinkles matter. First, "receive" includes constructive receipt: a check sitting in your mailbox on December 30 counts as received even if you have not touched it. Second, paying in advance does not automatically create a deduction. The 12-month rule lets you deduct a prepayment only if the benefit does not extend beyond 12 months after it begins or beyond the end of the following tax year, whichever comes first. A 12-month insurance policy paid in November qualifies; a three-year software contract paid up front does not.

The appeal is simplicity: the bank balance and the books move together, and you never pay tax on money you have not collected. The cost is that cash-basis reports mislead you in any month where billing and collecting drift apart.

The accrual method

Under the accrual method you record income when you earn it and expenses when you incur them, regardless of when cash moves. Sending the invoice creates revenue and a receivable. Receiving a vendor's bill creates an expense and a payable. A customer deposit for work not yet done is a liability, not income, until you deliver.

Accrual is what generally accepted accounting principles require, which is why banks and buyers ask for it. It is also the only method that produces a usable gross margin when there is any lag between doing the work and getting paid, because it puts the revenue from a job and the costs of that job in the same period. The trade-off is more bookkeeping: entering bills, applying payments to invoices, and reconciling receivables, payables, prepaid expenses and unearned revenue every month.

The same quarter under both methods

Take a two-owner commercial cleaning company in Tampa doing about $1.4 million a year. In the first quarter it billed $360,000 and collected $310,000: $45,000 of the collections were December invoices paid in January, and $95,000 of March billings were still open on March 31. It incurred $290,000 of payroll, supplies and overhead and paid $265,000 of it ($20,000 was December bills paid in January; $45,000 of March bills were unpaid at quarter end). It also paid $24,000 in January for a 12-month liability policy.

Same company, same 90 days, and a $43,000 gap in reported profit. Neither number is wrong. The cash figure says the bank account grew by about $21,000 before draws and loan payments. The accrual figure says the business earned a 17.8% net margin on the work it performed, once the insurance is spread over the year it covers. Price a new contract from the $21,000 and you underestimate the business; plan cash from the $64,000 and you are overdrawn by April. It is the gap described in why profit does not equal cash, from the other side.

Roll it forward to a tax return: on the cash method, the $95,000 of open receivables at December 31 is not taxed until collected in January. As long as the business keeps growing, some receivables are always deferred, a recurring benefit worth keeping if you qualify.

Who the IRS lets use the cash method in 2026

Under Section 448, C corporations, partnerships with a C corporation partner, and tax shelters must use the accrual method unless they meet the gross receipts test. For tax years beginning in 2026, an entity passes if its average annual gross receipts for the three prior tax years do not exceed $32 million, per section 4.30 of Rev. Proc. 2025-32. Receipts of businesses under common control are added together, so two $20 million companies with the same owner do not each get their own limit.

Sole proprietors, single-member LLCs, S corporations and partnerships without a C corporation partner are not on the Section 448(a) list at all, so they can use the cash method regardless of size as long as they are not a tax shelter and the inventory rules below do not require otherwise. The tax shelter trap is the one owners miss: an entity that allocates more than 35% of its losses to owners who do not actively manage it is a "syndicate" and loses the cash method for that year no matter how small it is.

Inventory changes the answer

Product businesses used to be pushed into accrual accounting once inventory became material to income. The small business taxpayer rules in Treasury Decision 9942 changed that. If you meet the same gross receipts test, Section 471(c) lets you treat inventory as non-incidental materials and supplies or follow your own books and records, and you are exempt from the Section 263A rules that load overhead into inventory cost.

What this does not mean is that inventory purchases are deductible when paid. Under the materials and supplies treatment, the cost of goods is deducted when the goods are used or sold, not when the vendor is paid, so a retailer that buys $150,000 of stock in December hoping to deduct it before year-end will be disappointed. Our default for product businesses is accrual books with a physical count at least at year-end, whichever tax method the return uses.

How to switch methods

A change in tax method requires Form 3115, Application for Change in Accounting Method. For a small business taxpayer moving from accrual to the overall cash method, the change is on the IRS automatic list (section 15.17 of Rev. Proc. 2022-14, designated change number 233), which means no user fee and no advance ruling. You attach the original form to the return for the year of change, filed on time including extensions, and send a signed copy to the IRS national office no later than the day you file that return.

The form also computes a Section 481(a) adjustment, the catch-up entry that keeps income from being taxed twice or skipped when methods change. A negative adjustment, typical going from accrual to cash when receivables exceed payables, is deducted in full in the year of change; a positive adjustment is spread over four years. That asymmetry is why accrual-to-cash switches suit growing service businesses, and why a cash-to-accrual switch should be planned for a year when you can absorb the extra income. Do not switch by changing how the bookkeeper enters transactions; a Form 3115 filed late loses the automatic consent.

What usually goes wrong

The most common mess we clean up is a set of books that is neither method: invoices are entered (accrual) but bills are recorded only when paid (cash), so revenue and expenses sit on different bases and the margin means nothing. Close behind is the QuickBooks user who records an invoice and then records the customer's payment as new income instead of applying it to the invoice, showing the sale twice on an accrual report.

On the tax side, the errors are usually deducting inventory purchases as bought, deducting a multi-year prepayment in full, forgetting that related companies are aggregated for the $32 million test, and switching methods on the books without filing Form 3115. Pick a basis for management reports and keep it, too; a cash-basis January compared with an accrual-basis January says nothing about growth.

Which method fits your business

When lenders and buyers want accrual

A bank underwriting a line of credit wants to see receivables and payables because they are the collateral and the risk. Anyone buying your business will restate cash-basis numbers to accrual during due diligence anyway, and every dollar of deferred revenue and unpaid bills they find after the letter of intent comes off the price. If either conversation is in your next three years, run accrual books now.

Accrual books also matter in three business models regardless of outside capital: anything that takes deposits or sells packages (cash-basis books show a great month when you sell and a terrible one when you deliver), anything with jobs that span months (job margin needs revenue and costs in the same period), and anything with slow-paying customers.

Our recommendation

If you run a service business under roughly $1 million with customers who pay within a couple of weeks, no inventory and no deposits, the cash method is fine for both books and taxes, and a disciplined monthly close matters far more than the method. If you carry inventory, take deposits, sell packages, run multi-month projects, wait more than 30 days to get paid, or expect to borrow or sell soon, keep accrual books and, if you qualify, still file on the cash method from a book-to-tax reconciliation. Reports that tell the truth, a return that defers tax on receivables: that is our default setup.

When to get help

The method question deserves an hour with an accountant when you are starting out, when revenue crosses roughly $1 million, when you add inventory or deposits, and before you apply for financing or start a sale. A change in tax method is worth doing with a CPA every time, because the Form 3115 and the Section 481(a) math are unforgiving. Our business tax planning and preparation work includes checking whether your current method is still the right one.

If your books are on one basis and your return on another and nobody has reconciled them, or you are not sure which basis you are on, that is what our monthly bookkeeping and accounting service sorts out in the first month. Request a 20-minute fit call and bring last year's return and a current P&L; we can usually tell you which method you are on, and which you should be on, before the call ends.

Jenny Gao, CPA, EA

Founder of Balance Partners. Florida-licensed CPA and IRS Enrolled Agent with more than a decade of accounting and tax experience. Jenny writes and reviews every guide on this site. About Jenny

This article is general educational information for U.S. business owners and is not accounting, tax, legal, payroll or financial advice for your situation. Rules change and vary by entity, state and facts. Balance Partners, LLC does not provide audit, review or other attest services. Last reviewed September 14, 2026.