Cash vs. Accrual Accounting: Which Method Is Right for Your Business Under IRC 448

By Yarik Yarosh, CPA ·September 5, 2026 ·Updated October 5, 2026 ·9 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

The accounting method your business uses determines the year in which income and expenses appear on your tax return, which directly affects how much tax you owe each year. Under IRC 448, the cash method is available to any business with average annual gross receipts of $32 million or less over the prior 3 tax years (for tax years beginning in 2026), regardless of entity type. This is the small business exception expanded by the TCJA, and it’s a significant benefit because the cash method provides superior tax-timing control. Before the TCJA, C-Corporations with more than $5 million in average gross receipts were generally required to use the accrual method, along with businesses that maintained inventory. The expanded $32 million threshold means that the vast majority of small businesses can now use the cash method, even if they’re C-Corps or have inventory. For businesses currently on the accrual method that qualify for the cash method, switching requires filing Form 3115 (Application for Change in Accounting Method) and computing a Section 481(a) adjustment.

✓Key takeaway

Who can use the cash method (current law):

Business Type	Cash Method Available?
Sole proprietorship (under $32M gross receipts)	Yes
Partnership (under $32M, no C-Corp partners)	Yes
S-Corporation (under $32M)	Yes
C-Corporation (under $32M)	Yes (TCJA expansion)
Partnership with C-Corp partner (under $32M)	Yes (TCJA expansion)
Tax shelter	No (regardless of size)
Any business over $32M average gross receipts	Must use accrual

Cash vs. accrual comparison:

Feature	Cash Method	Accrual Method
Income recognition	When received (cash, check, credit card payment)	When earned (regardless of collection)
Expense recognition	When paid	When incurred (regardless of payment)
Accounts receivable	Not in income until collected	In income when invoiced
Accounts payable	Not deducted until paid	Deducted when the liability is established
Inventory required?	No (under the small business exception)	Yes (if over $32M or if taxpayer chooses)
Tax-timing flexibility	High (can accelerate expenses, defer income)	Low (tied to economic events)
Complexity	Lower	Higher

Which accounting method should you use?

Hypothetical example

Round numbers. A consulting firm with $2 million in annual revenue considers the impact of cash vs. accrual on its tax liability.

Year-end position (December 31):

Item	Amount
Accounts receivable (invoiced but not yet collected)	$200,000
Accounts payable (expenses incurred but not yet paid)	$80,000
Prepaid expenses (paid in advance for next year)	$30,000
Revenue collected in cash	$1,800,000
Expenses paid in cash	$1,100,000

Tax comparison:

Item	Cash Method	Accrual Method
Revenue	$1,800,000 (collected)	$2,000,000 (earned)
Expenses	$1,130,000 (paid, including prepaid)	$1,100,000 (incurred, no prepaid deduction)
Net income	$670,000	$900,000
Federal tax (37% bracket)	$247,900	$333,000
Tax difference		$85,100 more with accrual

The cash method saves $85,100 in the current year because:

$200,000 in receivables isn’t yet income (saves $74,000 in tax)
$30,000 in prepaid expenses is deductible now (saves $11,100)
Partially offset by accounts payable being deductible under accrual but not yet paid under cash

Year-end tax planning with cash method:

Strategy	Tax Effect
Delay sending December invoices until January	Income deferred to next year
Collect outstanding receivables in December (if you want income in current year)	Accelerates income
Pay outstanding bills in December	Deduction in current year
Prepay January rent, insurance, or supply orders	Deduction in current year (subject to 12-month rule)
Delay depositing client checks until January	Income deferred (but constructive receipt applies if you have the ability to deposit)

Constructive receipt (the limit on cash method deferral): Under the constructive receipt doctrine (IRC 451), income is taxable when it’s made available to the taxpayer without substantial limitations, even if not actually received.

Constructive Receipt (taxable now)	Not Constructive Receipt (can defer)
Check received but not deposited	Invoice sent but client hasn’t paid
Interest credited to your account	Year-end bonus not payable until January
Payment available for pickup	Contract payment not due until next year
Year-end dividend declared and available

The 12-month rule for prepaid expenses: Under the 12-month rule in Treas. Reg. 1.263(a)-4(f), a cash-method taxpayer can deduct a prepaid expense in the year paid if the benefit doesn’t run past the earlier of (a) 12 months after the benefit starts or (b) the end of the tax year after the year of payment.

Prepayment	Deductible Now?
December 2025: Pay January 2026 rent ($5,000)	Yes (benefit within 12 months)
December 2025: Pay full year 2026 insurance ($24,000)	Yes (benefit runs Jan 1 to Dec 31, 2026: no more than 12 months after it starts and not past the end of 2026)
December 2025: Pay 2026-2027 two-year insurance ($48,000)	No (benefit extends beyond 12 months); deduct pro rata
December 2025: Prepay January 2026 supply order ($10,000)	Yes (delivery and use within 12 months)

Switching from accrual to cash (Form 3115):

Step	Details
Eligibility	Must meet the $32M gross receipts test
Form 3115	Filed with the tax return for the year of change
Section 481(a) adjustment	Calculates the cumulative difference between methods
Negative adjustment	If cash method produces lower income (typical), full deduction in year of change
Positive adjustment	If cash method produces higher income (unusual), spread over 4 years

Example 481(a) adjustment (accrual to cash):

Item	Adjustment
Remove accounts receivable from income	($200,000)
Remove accounts payable from deductions	$80,000
Remove accrued expenses from deductions	$20,000
Add prepaid expenses to deductions	($30,000)
Net 481(a) adjustment	($130,000)
Tax benefit (37%)	$48,100
Spread period	1 year (negative adjustment = full deduction in year of change)

When accrual is better:

Situation	Why Accrual May Be Preferred
Business is seeking outside investment or a loan	Accrual financials are more meaningful to investors and lenders
Business plans to go public	SEC requires accrual method (GAAP)
Average gross receipts approach $32M	May need to switch soon anyway
Business has significant prepaid revenue (deferred revenue)	Cash method forces immediate income recognition; accrual allows deferral
Long-term contracts	Percentage-of-completion method (accrual) may be required under IRC 460

Hybrid methods: Some businesses use a hybrid approach:

Method	How It Works
Cash for services, accrual for inventory	Common for businesses with both service and product revenue
Modified cash basis	Cash method with accrual for certain items (e.g., fixed assets depreciated, not expensed)
Special rules for advance payments (IRC 451(c))	One-year deferral of advance payments for accrual-method taxpayers

Illustrative numbers only, not a real client and not advice for your facts.

What triggers a required change in accounting method?

The IRS requires a change in accounting method when your current method doesn’t clearly reflect income (IRC 446), when your gross receipts exceed the threshold for using the cash method under IRC 448 ($32 million average for the prior 3 years, for tax years beginning in 2026), or when a new tax law mandates a different method. Voluntary changes (such as switching from cash to accrual to better match revenue and expenses) require filing Form 3115 with your tax return. Most accounting method changes require a Section 481(a) adjustment, which captures the cumulative difference between the old and new methods. A positive 481(a) adjustment (additional income) is spread over 4 years, while a negative adjustment (additional deduction) is taken entirely in the year of change. Changes made under the automatic consent procedures (Rev. Proc. 2015-13 for the procedures and Rev. Proc. 2025-23 for the list of automatic changes, or their successors) don’t need advance IRS approval but must follow detailed filing requirements.

Should I use cash basis or accrual basis accounting for my small business?

Cash basis records income when received and expenses when paid, making it simpler and giving you more control over timing. Accrual basis records income when earned and expenses when incurred, regardless of payment timing, providing a more accurate picture of profitability. The IRS requires accrual for businesses with inventory that have average annual gross receipts exceeding $32 million (for tax years beginning in 2026; $31 million for 2025). Below that threshold, you can choose either method. Most small service businesses use cash basis because of its simplicity and the ability to time income and deductions for tax planning. Once you choose a method, switching requires filing Form 3115 and may trigger a Section 481(a) adjustment that spreads the transition impact over four years.

How often should a small business reconcile its accounts?

Monthly reconciliation is the minimum standard for any business, but weekly reconciliation catches errors faster and makes month-end closing significantly easier. Bank reconciliation compares your accounting records to bank statements to identify timing differences (outstanding checks, deposits in transit) and errors (duplicate entries, missed transactions). Credit card reconciliation should happen monthly at minimum, matching each statement charge to a recorded transaction with the correct expense category and ensuring no unauthorized charges slipped through. Businesses with high transaction volume (retail, restaurants, e-commerce) benefit from daily point-of-sale reconciliation, which catches discrepancies before they compound into material misstatements at year-end.

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Cite this page

Yarik Yarosh, CPA. "Cash vs. Accrual Accounting: Which Method Is Right for Your Business Under IRC 448." Blue Cloud CPA, September 5, 2026, updated October 5, 2026. https://bluecloudcpa.com/guides/small-business-accounting-cash-vs-accrual-method-irc-448

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.