An aged account is an unpaid customer invoice that has passed its due date, and the length of time it has been overdue drives how a business tracks it, values it on the balance sheet, and eventually deducts it for tax purposes. The term is almost always used on the accounts receivable side, where every outstanding balance is sorted by how long it has gone unpaid. The older the balance, the less likely it is to be collected, and that reality shapes the accounting rules built around it.
When an Account Starts Aging
An account starts aging the day after its payment deadline passes, not the day the invoice is sent. If your terms are Net 30, the clock starts on day 31. Net 60 means the account is current through day 60 and ages from day 61 onward.
This timing matters because a large receivables balance is not automatically a problem. Many of those invoices may still be inside their payment window. The concern is the subset where the due date has come and gone, because collection probability drops sharply the longer a balance sits. Industry experience suggests that once an invoice crosses 90 days past due, the odds of collecting fall to roughly 50 percent or less, and they keep deteriorating from there.
A high concentration of very old receivables is one of the clearest warning signs of cash flow trouble. The balance sheet is carrying asset values the company may never convert to cash, and the pattern often points to weak credit policies, poor invoicing practices, or customers in financial distress.
The Aging Schedule
The accounts receivable aging schedule is the report that makes overdue balances visible. It lists every customer with an outstanding balance and sorts those balances into time-based columns showing how long each has been overdue. Accounting software generates this report automatically, but the structure is straightforward.
The standard columns are:
- Current (not yet past due)
- 1 to 30 days past due
- 31 to 60 days past due
- 61 to 90 days past due
- Over 90 days past due
Each unpaid invoice lands in the appropriate bucket based on days elapsed since its due date. The report totals each column, giving management a snapshot of the receivables portfolio. A business where 85 percent of receivables are current and only 2 percent sit in the 90-plus column is in a fundamentally different position than one where 25 percent of receivables are more than 90 days old.
The same aging logic runs in the other direction for accounts payable, sorting what you owe suppliers by how long the bills have been outstanding. That report drives payment scheduling and vendor management rather than the accounting estimates covered below.
Accounting for Aged Accounts Under GAAP
Under generally accepted accounting principles, receivables must appear on the balance sheet at the amount you actually expect to collect, not the amount you invoiced. Bridging that gap is where aged accounts drive real accounting consequences.
The Allowance for Doubtful Accounts
Companies create an allowance for doubtful accounts, a contra-asset that sits on the balance sheet and reduces gross receivables down to the expected collectible amount. When you increase the allowance, the offset hits the income statement as bad debt expense.
The logic follows the matching principle: the estimated cost of customers who will not pay should be recognized in the same period as the revenue those sales generated. Waiting until a specific customer defaults and then recording the loss would overstate income in earlier periods and dump losses into later ones.
Businesses estimate the allowance in one of two ways. The simpler method applies a flat percentage to total credit sales for the period. It is easy but ignores the current condition of outstanding balances. The more informative approach is the aging method, which assigns a different expected loss rate to each bucket on the aging schedule. The 1 to 30 day bucket might carry a 2 percent loss rate; the over-90-day bucket might carry 40 percent or more. Multiplying each bucket’s balance by its loss rate and adding the results gives the required ending balance in the allowance account.
Writing Off a Specific Account
When you determine that a specific customer’s balance is uncollectible, you write it off by reducing both the allowance account and the receivable by the same amount. Because the expense was already estimated and recorded in a prior period, the write-off itself does not change net income or the net value of receivables. It is a housekeeping entry that clears a balance everyone already expected would not be collected.
The Direct Write-Off Method
A simpler approach skips the allowance entirely and records bad debt expense only when a specific account is confirmed uncollectible. GAAP does not permit this for financial reporting because it violates the matching principle. The IRS does allow it for tax purposes, so many businesses use the allowance method on their financial statements while using direct write-off on their tax returns.
CECL and the 2025 Practical Expedient
The current expected credit losses model under ASC 326 changed how companies estimate the allowance. Rather than waiting for a loss event, the standard requires companies to estimate lifetime expected credit losses when a receivable is first recorded, using historical data, current conditions, and reasonable forecasts.1Financial Accounting Standards Board. FASB Staff Q&A – Topic 326, No. 2 For companies using aging schedules, the loss percentages assigned to each bucket should reflect both historical experience and what economic conditions suggest about future collectibility.
In 2025, the FASB issued ASU 2025-05 to ease some of the complexity. The update offers all companies a practical expedient allowing them to assume that current conditions at the balance sheet date will not change over the remaining life of the receivable. Non-public entities get an additional option: they can factor in collections that actually occur after the balance sheet date but before the financial statements are issued, which often reduces the required allowance significantly.2Financial Accounting Standards Board. ASU 2025-05 Financial Instruments – Credit Losses (Topic 326)
Tax Treatment of a Written-Off Account
Tax consequences depend almost entirely on your accounting method. Accrual-method businesses already reported the income when they earned it, so the IRS allows a deduction when the debt becomes wholly or partially worthless.3Office of the Law Revision Counsel. 26 USC 166 – Bad Debts The loss is deducted on the business tax return for the year the debt becomes worthless.4Internal Revenue Service. Topic No. 453, Bad Debt Deduction
Cash-basis businesses generally get no deduction at all. Because you never reported the income (cash method records revenue only when payment arrives), there is no previously reported amount to write off. The IRS will not let you deduct money you never claimed as revenue.
To support the deduction, you need to show that the debt is genuinely worthless and that you took reasonable steps to collect it. A court judgment is not required, but you do need evidence that a judgment would be uncollectible. The deduction must be taken in the year the debt becomes worthless, not earlier or later, and that timing question trips up many businesses.4Internal Revenue Service. Topic No. 453, Bad Debt Deduction
Metrics That Track Collection Performance
Two ratios read the receivables portfolio in numbers.
Days sales outstanding measures the average time between making a credit sale and collecting cash. Divide accounts receivable by total credit sales for the period, then multiply by days in the period. If your terms are Net 30 and DSO is running at 52, customers are taking nearly three weeks longer to pay than terms allow. A rising DSO is often the first quantitative signal that aged balances are building.
Accounts receivable turnover measures how many times you collect your average receivables balance during a period. Divide net credit sales by average accounts receivable. A turnover of 12 means you collect the equivalent of your full receivables balance once a month, which is healthy for most businesses. A declining turnover means cash is sitting in receivables longer than it should.
Neither metric tells you much in isolation. The value comes from watching them over time and comparing against your credit terms.
Escalating and Collecting an Aged Account
Once an account is past due, a structured follow-up process matters more than intensity. Automated reminders in the first week or two after the due date, a personal phone call or email once the balance hits 30 days, and a formal demand letter at 60 days is a typical escalation pattern.
The decision to hand a balance to a collection agency or pursue legal action usually comes at the 90-day mark, after internal efforts have failed. Commercial collection agencies typically charge contingency fees ranging from 30 to 50 percent of the amount recovered, so the math only works when the alternative is writing the balance off entirely. Most states impose a statute of limitations on debt collection lawsuits, generally between three and six years depending on the jurisdiction and the type of obligation.5Consumer Financial Protection Bureau. Can Debt Collectors Collect a Debt That’s Several Years Old? Missing that window means you lose the ability to sue, regardless of how valid the debt is.
If you use a third-party collection agency for consumer debts, the Fair Debt Collection Practices Act governs how that agency can operate. The FDCPA applies specifically to debts incurred for personal, family, or household purposes.6Office of the Law Revision Counsel. 15 USC 1692a – Definitions Business-to-business debts fall outside the statute’s scope, so commercial collection is not subject to the same federal restrictions on contact methods, timing, and disclosure.7Federal Reserve. Fair Debt Collection Practices Act
Turning Aged Receivables Into Cash
Aged receivables do not have to sit on the balance sheet waiting for payment or write-off. Two financing arrangements convert them into immediate cash.
Factoring involves selling your outstanding invoices to a third party at a discount. The factor typically pays 80 to 90 percent of the invoice value upfront, then collects directly from your customer. After the customer pays in full, the factor remits the remaining balance minus its fee. In a recourse arrangement, you are on the hook if the customer never pays. In a non-recourse arrangement, the factor absorbs the credit risk, though typically only for customer insolvency, not for disputes or documentation problems.
Invoice discounting works more like a secured loan. A lender advances you a percentage of your receivables balance, and you continue collecting from customers yourself. As payments come in, you repay the lender plus an agreed-upon fee. Because the lender has less control over collections, invoice discounting generally requires a proven track record of reliable customers and is more common among larger businesses.
Both arrangements come at a cost, but they can be worth it when the alternative is a cash flow gap that forces you to miss payroll or turn down new business.