Cash vs. Accrual Accounting: Which Method Should Your Small Business Use?

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 choice between cash and accrual accounting affects when income and expenses are recognized for tax purposes, which directly impacts taxable income and the timing of tax payments. Under the cash method, income is recognized when actually or constructively received, and expenses are deducted when paid. Under the accrual method, income is recognized when the right to receive payment is established (when services are performed or goods are delivered), and expenses are deducted when the liability is incurred (when the obligation arises, not when payment is made). The TCJA significantly expanded access to the cash method: under IRC 448(c), any business with average annual gross receipts of $29 million or less (2025 inflation-adjusted threshold) can use the cash method, regardless of entity type. Prior to the TCJA, C-Corporations, partnerships with a C-Corp partner, and tax shelters were generally required to use the accrual method.

✓Key takeaway

Cash vs. accrual comparison:

Factor	Cash Method	Accrual Method
Income recognition	When received (cash, check, card payment)	When earned (invoice date or service completion)
Expense recognition	When paid (check clears, card charged)	When incurred (liability established)
Year-end flexibility	High (delay invoicing, accelerate expenses)	Low (income/expense timing less controllable)
Complexity	Simple	More complex (accounts receivable, accounts payable tracking)
Financial statement accuracy	Less accurate (doesn’t match revenue to expenses)	More accurate (matches revenue to the period earned)
Tax planning opportunities	Greater (timing control)	Fewer
IRS requirement	Under $29M average gross receipts	Over $29M, or certain industries

Who must use accrual:

Business Type	Must Use Accrual?
Business over $29M average gross receipts	Yes
Tax shelters	Yes
Business with inventory (over $29M)	Yes
Small business under $29M (any entity)	No (can choose cash)
Small business with inventory (under $29M)	No (TCJA exception, IRC 471(c))

Year-end tax planning under the cash method:

Strategy	Effect
Delay invoicing in December	Income deferred to next year
Accelerate expenses (pay January bills in December)	Deduction moved to current year
Prepay up to 12 months of expenses	Current-year deduction (12-month rule)
Use credit card for December purchases	Deduction at charge date, not payment date
Defer customer payments to January	Income deferred (but beware constructive receipt)

The 12-month prepayment rule: Cash-basis taxpayers can deduct prepaid expenses if the benefit does not extend beyond 12 months from the date of payment OR beyond the end of the next tax year.

Example: On December 15, 2025, prepay 12 months of rent ($12,000 for January through December 2026). Deductible in 2025 because the benefit period doesn’t extend beyond the end of the next tax year (December 31, 2026).

How does the accounting method choice affect taxes?

Hypothetical example

Round numbers. A consulting firm. S-Corp. Cash method. $300,000 in net income. December 31 tax planning.

Current year income and expenses (before year-end planning):

Item	Amount
Revenue received	$340,000
Expenses paid	$200,000
Net income (before planning)	$140,000

Year-end planning strategies (cash method):

Strategy	Action	Tax Effect
Delay invoicing	Send $30,000 in December invoices on January 2 instead	($30,000) income deferred
Accelerate expenses	Pay January rent ($3,000) on December 30	$3,000 additional deduction
Prepay insurance	Pay 6-month premium ($6,000) on December 28	$6,000 additional deduction
Buy supplies	Purchase $5,000 in office supplies/equipment on December 30	$5,000 additional deduction
Credit card charges	Charge $4,000 in business expenses on December 31 (paid in January)	$4,000 deduction (charge date = deduction date for cash basis)

Item	Before Planning	After Planning
Revenue	$340,000	$310,000 (deferred $30,000)
Expenses	$200,000	$218,000 (accelerated $18,000)
Net income	$140,000	$92,000
Tax savings (24% bracket)		$48,000 x 24% = $11,520

Same scenario under accrual method:

Strategy	Available?	Why Not
Delay invoicing	No	Income recognized when earned (work completed in December), not when invoiced
Accelerate expenses	Partially	Only for expenses actually incurred in December
Prepay insurance	No	Recognized when coverage period occurs, not when paid
Buy supplies	Yes	Can accelerate purchases
Credit card timing	N/A	Recognized when liability incurred

Under accrual, the firm would recognize the $30,000 in December regardless of when invoiced (the work was completed in December). Tax savings from year-end planning: approximately $2,000-$3,000 (limited to equipment purchases).

The accrual method advantage: matching and financial clarity

Scenario	Cash Method Shows	Accrual Method Shows
December: performed $30K work, not yet paid	$0 revenue	$30,000 revenue
December: received $20K for January work	$20,000 revenue	$0 revenue (deferred)
December: bought $10K equipment, paid in January	$0 expense	$10,000 expense

The accrual method produces financial statements that more accurately reflect the business’s economic activity. Banks and investors prefer accrual-based financials because they match revenue to the period it was earned.

Changing methods: A business can change from accrual to cash (or vice versa) by filing Form 3115 (Application for Change in Accounting Method). The change requires a Section 481(a) adjustment to prevent income from being duplicated or omitted.

Change	481(a) Adjustment
Accrual to cash	Negative adjustment (reduce income for existing A/R, add back prepaid expenses). Recognized 100% in the year of change
Cash to accrual	Positive adjustment (add income for existing A/R, deduct existing A/P). Spread over 4 years

Example: switching from accrual to cash with $50,000 in accounts receivable:

481(a) negative adjustment: ($50,000)
Year of change: income reduced by $50,000
Tax savings: $50,000 x 24% = $12,000 (one-time benefit)

This one-time benefit makes the switch from accrual to cash attractive for eligible businesses. The $50,000 was already taxed under accrual (when earned) but has not been received yet (cash). The negative adjustment prevents double-counting.

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 Should Your Small Business Use?." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-cash-vs-accrual-accounting-method

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