What Is Bad Debt Expense, and How Should a Small Business Record It?

Bad debt expense is the cost a business records when customer invoices are unlikely to be collected. It usually applies to companies that sell on credit and use accrual accounting. Recording bad debt prevents accounts receivable and profit from appearing higher than the amounts the business realistically expects to collect.

Why Bad Debt Happens

Customers may fail to pay because of insolvency, disputes, fraud, cash-flow problems, or simple disappearance. Even a business with careful credit policies can experience some losses. The management question is not whether every bad debt can be prevented, but whether credit risk is measured, priced, and controlled.

Bad Debt Expense vs. an Unpaid Invoice

An invoice is not automatically bad debt just because it is late. Many overdue balances remain collectible through reminders, payment plans, or collection activity. Bad debt is recognized when a loss becomes probable or when the company estimates that part of its receivables will not be collected.

The Direct Write-Off Method

Under the direct write-off method, the business records bad debt expense when a specific invoice is determined to be uncollectible. Accounts receivable decreases at the same time. This method is simple, but the expense may appear months after the related sale, which can distort period-to-period results.

The Allowance Method

The allowance method estimates credit losses before every failed account is known. The company records bad debt expense and increases an allowance for doubtful accounts, a contra asset that reduces gross receivables. When a particular invoice is later written off, the company reduces both the receivable and the allowance.

A Simple Example

Suppose a business has $100,000 in outstanding customer invoices and estimates that 3 percent will not be collected. It records $3,000 of bad debt expense and a $3,000 allowance. The balance sheet then reports $97,000 of net accounts receivable, even though individual customer balances still total $100,000.

How to Estimate Credit Losses

One approach applies a historical loss percentage to total credit sales or receivables. A more detailed method uses an aging schedule, assigning higher loss rates to older invoices. For example, a balance more than 90 days late may carry a greater expected loss than one that is only 10 days late.

Watch for Changes in Customer Behavior

Historical averages can become outdated. A major customer's financial trouble, an industry slowdown, concentration in one client, or looser credit standards may increase risk. Review large and unusual balances individually instead of relying only on a company-wide percentage.

Bad Debt and Taxes

Tax rules do not always match financial reporting rules. Cash-basis businesses generally do not deduct an invoice they never included in taxable income, while accrual-basis businesses may have different requirements for proving worthlessness. Consult a qualified tax professional before assuming an accounting entry creates a tax deduction.

How to Reduce Future Bad Debt

Use written payment terms, credit checks for larger accounts, deposits, milestone billing, prompt invoices, and consistent collection follow-up. Monitor days sales outstanding and the percentage of receivables more than 30, 60, and 90 days late. Stop extending additional credit when a customer's risk exceeds what the business can absorb.

What Owners Should Take Away

Bad debt expense is not merely a bookkeeping cleanup. It measures the cost of selling on credit. Recording it realistically improves the balance sheet, protects profit forecasts, and helps owners decide whether their payment terms and collection process are working.

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