What Does It Mean to Accrue an Expense in Accounting?

To accrue an expense in accounting means to record a cost in your books at the moment your business incurs it, even if no invoice has arrived and no money has left your account yet. If your team worked the last five days of March but payday falls in April, those wages belong on March’s income statement. The bill and the payment come later; the expense is already real.

This is the core of accrual accounting, and it’s the standard method under Generally Accepted Accounting Principles set by the Financial Accounting Standards Board.¹ Cash-basis accounting, where you only book a transaction when money changes hands, is simpler but leaves obligations invisible until they’re paid.

Why Expenses Get Recorded Before They’re Paid

The reason for the practice is the matching principle: expenses should sit in the same reporting period as the revenue they helped generate. Say your company earns $50,000 in sales during December. The sales commissions, the materials consumed, and the shipping fees incurred to fill those orders all belong on December’s income statement, even if you don’t cut checks until January. Without that alignment, December looks artificially profitable and January looks like a loss. Neither picture is true.

Think about your electric bill. You run the lights all through January, but the utility doesn’t send a bill until February. Under accrual accounting, January’s statements include an estimate of that electricity cost because January is when you used the power. The legal obligation existed the moment the meter was spinning, and the books should reflect it.

Accrued Expenses vs. Accounts Payable

Both sit as current liabilities on the balance sheet, and people mix them up constantly. The difference is paperwork.

Accounts payable is what you record when a vendor’s invoice arrives. The amount is known, the terms are set, and you’re just waiting for the due date. An accrued expense is what you record when no invoice has arrived yet. You know you owe money because you consumed the service, but you have to estimate the amount using purchase orders, contracts, or historical patterns.

Your law firm bills on the 10th of the month for the prior month’s work. When that invoice lands, you book it as accounts payable. But on the last day of the month, before the bill shows up, you already know the firm did roughly 20 hours of work at an agreed rate. Booking that estimated cost right then is an accrual. Once the invoice arrives, the accrual is replaced by the actual payable.

How the Entry Is Recorded

At the end of each accounting period, you make an adjusting entry using standard double-entry bookkeeping. You debit an expense account, which increases total expenses on the income statement, and credit a liability account such as “accrued wages” or “accrued interest payable,” which increases the debt on the balance sheet.

A concrete example. Your pay period ends on January 3, but you’re closing December’s books on December 31. Employees earned $8,000 during those last few days of December. You post an adjusting entry: debit Wages Expense for $8,000, credit Accrued Wages for $8,000. December’s income statement now shows the true labor cost, and the balance sheet carries the corresponding obligation. When payday arrives in January, you debit Accrued Wages (clearing the liability) and credit Cash (reducing the bank balance).

The Reversing Entry

Here’s where people trip up. You accrued $8,000 in wages at the end of December. In January, the real payroll runs and the full paycheck amount hits the books. If you don’t undo the December accrual first, you’ve booked the same wages twice. January’s expenses are now overstated by $8,000.

The fix is a reversing entry, posted on the first day of the new period. It flips the original accrual: debit Accrued Wages, credit Wages Expense, each for $8,000. That zeros out the liability and temporarily creates a negative balance in wages expense. When the actual payroll posts, the numbers net to the correct amount for January. Most accounting software automates the reversal, but if you’re doing it manually, skipping this step is one of the easiest ways to corrupt your financial statements.

Common Types of Accrued Expenses

A handful of accruals come up in nearly every business:

Wages and salaries. Employees rarely stop working on the exact day a pay period closes, so compensation earned in one month but paid in the next is accrued. This includes related payroll taxes and benefits.
Interest on debt. Loan interest builds daily on the outstanding principal. Even if your lender only collects quarterly, monthly statements need to reflect the interest that accumulated during the month.
Utilities. Meter reads follow the utility’s schedule, not yours. When billing cycles don’t line up with your accounting periods, you estimate usage and accrue the cost.
Income taxes. Companies estimate quarterly liability, starting with pre-tax income, adjusting for book-tax differences, and applying the applicable rate. The federal C corporation rate is 21%. The estimate is accrued even though the payment may not be due for months.
Product warranties. When a company sells goods with a warranty, it accrues the estimated future repair or replacement cost at the time of sale, as long as claims are probable and the amount can be reasonably estimated. Estimates usually come from historical claim rates.

The common thread is timing. In each case, the economic event happens before the bill arrives or the payment goes out. Accrual accounting closes that gap.

When You Have to Use Accrual Accounting

Not every business is required to accrue. The Internal Revenue Code draws the line by size. Under Section 448, C corporations, partnerships with a corporate partner, and tax shelters generally cannot use the cash method, but businesses that meet the gross receipts test are exempt from that restriction.² A business qualifies if its average annual gross receipts over the prior three tax years fall below the inflation-adjusted threshold. For tax years beginning in 2026, that threshold is $32 million.³

Small businesses meeting the gross receipts test can also choose not to keep a traditional inventory and can use the cash method. Once a corporation or partnership fails the gross receipts test in any year, it must switch to accrual starting that year.⁴

Accruing on Your Books Isn’t the Same as Deducting on Your Taxes

Recording an accrued expense for financial reporting and deducting it on your tax return are two different questions. The IRS applies a stricter test.

Under Section 461 of the Internal Revenue Code, an accrual-basis taxpayer cannot treat a liability as incurred for tax purposes until two things happen. First, all events must have occurred that establish the liability and let you determine the amount with reasonable accuracy. Second, “economic performance” must have taken place.⁵

What economic performance means depends on the expense:

For services or property provided to you, it occurs as the other party delivers.⁵
For leased or rented property, it occurs ratably over the period you use it.⁶
For taxes, it occurs when you actually pay the tax.⁶
For tort and breach-of-contract liabilities, it occurs as payments are made to the person you owe.⁵

The practical effect: you might correctly accrue an expense in December under GAAP but be unable to deduct it on your tax return until the following year, when economic performance actually happens. Book income and taxable income diverge for exactly this reason.

There’s a workaround for routine costs. Under the recurring item exception, if a liability is recurring, the all-events test is met by year-end, and economic performance happens within 8½ months after the close of your tax year, you can deduct the expense in the earlier year. The item also has to be either immaterial or produce a better match against related income than deferring would.⁵ The exception doesn’t apply to interest, workers’ compensation, tort liabilities, or breach-of-contract obligations.⁷

How Accruals Show Up on Your Financials

Every dollar you accrue increases current liabilities, and that ripples through the ratios lenders and investors watch. Working capital, calculated as current assets minus current liabilities, shrinks when accrued liabilities grow. A company with $500,000 in current assets and $300,000 in current liabilities has $200,000 in working capital. Accrue another $50,000 in unpaid expenses and working capital drops to $150,000 without a single check being written.

The current ratio moves the same way. Skipping accruals makes a company look more liquid than it really is, which is exactly the distortion accrual accounting is designed to prevent. Lenders reviewing creditworthiness or checking debt covenants will look at these numbers, so understating accrued liabilities can produce real consequences when the actual figures surface later.

Auditors verify accrued estimates by comparing them against payments made shortly after the balance sheet date. If you accrued $15,000 for a vendor bill in December and the actual invoice that arrives in January is $22,000, that gap raises questions. Consistent, well-documented estimates built on purchase orders, contracts, and historical spending patterns keep the audit clean and protect the credibility of your statements.

1
Financial Accounting Standards Board. About the FASB
2
Office of the Law Revision Counsel. 26 USC 448 Limitation on Use of Cash Method of Accounting
3
Internal Revenue Service. Revenue Procedure 2025-32 Inflation-Adjusted Items for 2026
4
Internal Revenue Service. Publication 538 Accounting Periods and Methods
5
Office of the Law Revision Counsel. 26 USC 461 General Rule for Taxable Year of Deduction
6
eCFR. 26 CFR 1.461-4 Economic Performance
7
eCFR. 26 CFR 1.461-5 Recurring Item Exception