Cash vs. accrual accounting: the difference small businesses should understand

Under the cash method, income is generally reported when it is actually or constructively received, and expenses are generally deducted or capitalized when paid. For a simple service business, that can make the books intuitive because revenue and expense timing is closer to bank activity.

Under the accrual method, income is generally reported when earned even if cash arrives later, while expenses are generally recognized when incurred even if payment happens later. That makes accounts receivable, accounts payable, deferred revenue, accrued expenses, and period cutoffs much more important.

A company may want accrual-style management reporting because it better matches revenue and costs to the period in which the work happened. Federal tax rules separately determine which accounting methods are permitted or required for the return, including special rules for inventories, tax shelters, and larger businesses.

The accounting method is a tax concept as well as an internal reporting choice. A business generally adopts an accounting method on its first return, and changing a method can require IRS procedures such as Form 3115. If the books and tax return use different approaches, document the bridge so year-end adjustments are repeatable.

Cash tells you what moved through the bank. Accrual tells you more about what the business economically earned and consumed during the period. A growing company often needs both a cash view for liquidity and an accrual view for performance, even when the tax method is a separate determination.