Changing Accounting Methods: Cash to Accrual (or Accrual to Cash) for Small Businesses
Most small businesses use the cash method of accounting: income is reported when received, and expenses are deducted when paid. The cash method is simpler and provides more control over the timing of income and deductions. However, some businesses are required to use the accrual method (income reported when earned, expenses deducted when incurred), and others may benefit from switching voluntarily.
Changing accounting methods is not as simple as just doing it differently. The IRS requires formal approval through Form 3115 (Application for Change in Accounting Method). The change creates a one-time adjustment under IRC 481(a) that accounts for the items that would have been reported differently under the new method.
When a business MUST use accrual:
- C-Corporations with average annual gross receipts exceeding $32 million (3-year average, for 2026)
- Tax shelters (regardless of size)
- Businesses required to maintain inventory (unless they qualify for the small business exception under TCJA, which allows businesses with $32 million or less in average gross receipts to use the cash method even with inventory)
When a business might WANT to switch:
- Cash to accrual: Required for some loan covenants, investor reporting, or when the business grows past the $32 million threshold. May present a more accurate picture of financial performance.
- Accrual to cash: Allowed after TCJA expanded the small business exception. Switching to cash from accrual can defer income (by recognizing only when collected) and accelerate deductions (by deducting when paid rather than when incurred). This creates a one-time tax benefit.
How to change: File Form 3115 with the tax return for the year of change (automatic consent procedure for most small business method changes). The IRC 481(a) adjustment is calculated and reported over 1-4 years depending on whether it’s positive (income increases, spread over 4 years) or negative (income decreases, taken in full in the year of change).
How does the IRC 481(a) adjustment work?
Is the change worth the administrative burden?
For most small businesses under the $32 million threshold, the cash method is simpler, provides better cash flow visibility, and offers more year-end tax planning opportunities (deferring income by delaying invoicing, accelerating deductions by prepaying expenses). The accrual method is better for businesses that want GAAP-compliant financials, need them for investors or lenders, or have significant inventory.
A CPA should run the IRC 481(a) calculation before filing Form 3115 to determine whether the one-time adjustment is favorable. In most cases, switching from accrual to cash produces a negative adjustment (immediate tax benefit), while switching from cash to accrual produces a positive adjustment (additional tax spread over 4 years).
How often should a small business reconcile its bank accounts?
Monthly reconciliation is the minimum standard. Reconcile every bank and credit card account within the first week after each statement closes. The process compares your internal records (accounting software or ledger) against the bank statement to catch errors, unauthorized charges, and recording mistakes. Businesses with high transaction volume (retail, restaurants, e-commerce) should reconcile weekly or even daily for cash accounts. Unreconciled accounts are the most common source of year-end surprises, missed deductions, and incorrect estimated tax payments. Most accounting software automates the matching, but someone still needs to review and investigate discrepancies.
How often should I reconcile my business bank accounts?
Monthly reconciliation is the minimum standard. Matching your bank statement to your accounting records each month catches errors, unauthorized transactions, and missed entries before they compound. For cash-intensive businesses (restaurants, retail, service businesses with cash payments), weekly reconciliation is recommended because the volume of transactions makes errors harder to trace after a full month. The reconciliation process compares your book balance to the bank statement balance, identifying outstanding checks, deposits in transit, bank fees, and any discrepancies. Unreconciled accounts are the most common source of year-end accounting headaches and the number one reason tax preparation takes longer than expected. Cloud accounting software (QuickBooks Online, Xero) automates much of this through bank feeds, but you still need to review and approve the categorizations.
Start with a Diagnostic: a CPA licensed in the US and Canada reads your file and tells you in writing what's wrong and how to fix it, three to four business days after you finish the questions. The report is $250. If you hire us for any work after that, you get the $250 back as a discount on that work. Or send us your return or your letter and get a fixed price, free.
One or two plain-English guides a week on US-Canada tax. No spam, unsubscribe anytime.
Done. The next guide will land in your inbox.
Yarik Yarosh, CPA. "Changing Accounting Methods: Cash to Accrual (or Accrual to Cash) for Small Businesses." Blue Cloud CPA, September 5, 2026, updated October 4, 2026. https://bluecloudcpa.com/guides/small-business-accounting-methods-change
This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.