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

By Yarik Yarosh, CPA ·September 5, 2026 ·6 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 $30 million or less over the prior 3 tax years, 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 $30 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 $30M gross receipts)	Yes
Partnership (under $30M, no C-Corp partners)	Yes
S-Corporation (under $30M)	Yes
C-Corporation (under $30M)	Yes (TCJA expansion)
Partnership with C-Corp partner (under $30M)	Yes (TCJA expansion)
Tax shelter	No (regardless of size)
Any business over $30M 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 $30M 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 Rev. Proc. 2004-40, a cash-method taxpayer can deduct a prepaid expense in the year paid if the benefit does not extend more than 12 months beyond the earlier of (a) the date of payment or (b) the first day of the month in which the payment is made.

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 within 12 months of payment date)
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 $30M 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 $30M	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.

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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. 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.