Allowance for Doubtful Accounts: Estimate What Customers May Not Pay

A business may have $80,000 of customer invoices outstanding without expecting to collect all $80,000. Some invoices are simply not due yet. Others are disputed, overdue or tied to customers experiencing financial difficulty. An allowance for doubtful accounts is an accounting estimate of the portion that may not be collected. It is not a list of customers you have decided to stop pursuing.

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Separate three different decisions

Collection: Who owes the money, what is due, and what follow-up is appropriate? Estimation: How much of the total receivable balance might ultimately be uncollectible? Write-off: Has a specific balance met the company's documented criteria for removal from the accounting records? These decisions inform each other, but they are not interchangeable.

For businesses using accrual accounting and applicable financial reporting rules, an allowance is generally recorded as a contra-asset that reduces gross accounts receivable to an estimated collectible amount. Cash-basis books, tax reporting, and particular financial-reporting frameworks can require different treatment. Do not apply an accrual entry mechanically to every set of books.

Start with a reliable aging report

Before estimating anything, reconcile the accounts receivable control account to the customer-level detail. Review open credits, unapplied receipts, duplicated invoices, old balances that were actually paid, and invoices under dispute. An aging report containing errors will produce a precise-looking but unreliable allowance.

Group the remaining balances into meaningful age categories, such as current, 1–30 days overdue, 31–60, 61–90, and over 90. Consider customer concentration, disputed balances, industry exposure, payment history and subsequent cash receipts. Older invoices can carry greater risk, but age alone does not determine collectability.

Build a supportable estimate

One common approach assigns a loss-rate estimate to each aging category and applies it to the corresponding balance. Another uses historical bad-debt experience adjusted for current information. Neither approach should be treated as a universal percentage table: your own data, the business's customer mix, unusual circumstances and the applicable accounting standard matter.

For an illustrative calculation, suppose the reconciled aging report contains $30,000 current with a 1% estimated loss, $12,000 moderately overdue with a 5% loss, and $8,000 significantly overdue with a 20% loss. The estimated uncollectible amount is $300 + $600 + $1,600 = $2,500. The gross receivables balance is $50,000; the illustrative net collectible balance is $47,500. These percentages are examples, not recommended rates.

Record only the adjustment needed

Under the allowance approach, the entry to establish or increase the allowance generally debits bad debt expense and credits allowance for doubtful accounts. But the required entry is the change needed to reach the ending estimate, not necessarily the entire new estimate.

If the calculated ending allowance should be a $2,500 credit and the allowance already has a $700 credit balance, the illustrative adjusting entry is a $1,800 debit to bad debt expense and a $1,800 credit to the allowance. If the existing balance is a debit, or if the estimate declines, the adjustment differs. Review the actual ledger before posting.

Do not expense the same loss twice

When a specific invoice is approved for write-off and the business uses the allowance method, the usual entry debits the allowance and credits accounts receivable. It does not create another bad debt expense at that moment. A direct write-off method works differently and may not be appropriate for financial statements prepared under accrual-basis GAAP.

Keep approval evidence, collection history, invoice identification, and the reason for the write-off. A write-off changes the accounting record; it does not automatically settle the legal debt or mean collection must cease. Consult appropriate advisers about collection rights and tax deductions.

Make the review repeatable

• Reconcile customer subledger balances to the general ledger before calculating an allowance.
• Document the aging date, categories, rates, calculations, and known customer-specific risks.
• Investigate unusual credit balances and receipts posted after the reporting date.
• Have someone other than the preparer review material estimates and write-offs when practical.
• Revisit the estimate at the business's reporting cadence and when facts materially change.
• Track subsequent collections and actual losses so the method improves rather than remaining an arbitrary percentage.

What the allowance does not tell you

A healthy allowance process does not replace a collections process. It does not tell you which customer to call today, whether a dispute is justified, or whether your invoice terms are effective. Review the accounts receivable process and unapplied payments alongside the estimate.

Summer Peaks can review aging schedules, reconcile customer balances, organize collection records, build reporting, and maintain recurring accounts receivable accounting. Businesses may hire us for that single function or for broader bookkeeping and accounting. All client work stays in the United States.

Source and accounting boundaries

Yale University, Learning Accounting: Adjustments Involving Estimation—Accounts Receivable, explains the allowance as a contra-asset, the expense/allowance adjusting entry, and the allowance/receivable entry for a specific write-off. The operational review steps and numerical example here are original Summer Peaks guidance. Source reviewed October 14, 2026. Estimation methods, recognition, materiality, financial statement presentation, and tax consequences depend on the business's facts and reporting framework.