In accounting, A/R stands for accounts receivable: the money customers owe your business for goods or services you’ve already delivered but haven’t been paid for yet. It sits on the balance sheet as a current asset because you expect to collect the cash within a year. Every unpaid customer invoice is an account receivable, and the sum of those invoices at any moment is your A/R balance.
A/R exists because of a tradeoff most businesses make daily. Letting customers pay later increases sales volume and builds loyalty, but your cash is tied up until they follow through. Most invoices carry payment windows of 30 to 90 days, and during that window the amount owed sits on your books as an asset you expect to convert into cash.
How the A/R Number on the Balance Sheet Is Built
The figure reported as accounts receivable isn’t the raw total of every outstanding invoice. It’s the net realizable value: what the company realistically expects to collect after accounting for customers who will never pay.
To arrive at that number, the company subtracts an allowance for doubtful accounts from the gross receivable balance. If customers owe $500,000 in total but you estimate $15,000 will prove uncollectible, your balance sheet shows A/R of $485,000. The allowance is a contra-asset account, meaning it directly reduces the reported value of the asset it’s paired with.
A/R also has a less obvious tie to the income statement through accrual accounting. Under the accrual method, you record revenue when you deliver the goods or perform the service, not when cash arrives. The moment you ship an order and send an invoice, your income statement reflects the revenue and your balance sheet simultaneously gains an account receivable. The two stay linked until the customer pays and the receivable disappears.
How A/R Works From Invoice to Collection
The receivable cycle starts when you issue an invoice. That invoice spells out the payment terms, and the most common format is “Net 30,” meaning the full amount is due within 30 days. Longer terms like Net 60 or Net 90 give customers more breathing room but tie up your cash for longer.
Some businesses nudge customers to pay early by offering discounts. A term like “2/10 Net 30” means the customer can take a 2% discount if they pay within 10 days; otherwise, the full amount is due by day 30. Whether that discount is worth the lost revenue depends on how much you value faster cash flow.
Credit Limits
Before extending credit to a new customer, most businesses set a ceiling on how much that customer can owe at any one time. The credit limit decision typically factors in the customer’s payment history, creditworthiness, revenue, and existing debt. For new customers without an established track record, you’re often relying on personal credit scores or industry references. Limits that are too generous expose you to large losses; limits that are too tight push potential buyers to competitors.
Aging Schedules
An aging schedule is the primary tool for tracking receivable quality. It sorts every outstanding invoice into time-based buckets: current, 1–30 days past due, 31–60 days, 61–90 days, and 90+ days. The older the invoice, the less likely you are to collect. Anything sitting in the 90+ day bucket deserves immediate attention, because at that point the probability of ever seeing the money drops sharply.
Beyond triggering collection calls, the aging schedule feeds directly into the estimate of uncollectible accounts. Each bucket gets assigned a progressively higher non-payment percentage. Recent invoices in the current bucket might carry a 1% estimated loss rate, while invoices past 90 days might carry 20% or more. Multiply each bucket’s balance by its estimated loss rate, add the results, and you get the total allowance for doubtful accounts.
Accounting for Receivables That Won’t Be Paid
No matter how carefully you vet customers, some percentage of receivables will never be collected. Accounting standards require you to anticipate those losses rather than pretend every dollar is collectible. The requirement flows from the matching principle: the expense of uncollectible accounts should be recognized in the same period as the revenue those credit sales generated.
The Allowance Method
Under generally accepted accounting principles, the allowance method is the standard approach for financial reporting. You estimate expected losses at the end of each period, record that estimate as bad debt expense on the income statement, and credit the allowance for doubtful accounts on the balance sheet. No individual customer’s invoice gets singled out yet. You’re acknowledging that, statistically, some portion of your receivables won’t convert to cash.
When a specific invoice is finally determined to be uncollectible, you write it off by reducing both the allowance and the receivable by the same amount. Since the expense was already recorded when the allowance was set up, the write-off itself doesn’t hit the income statement again.
The Direct Write-Off Method
The direct write-off method skips the estimation step entirely. There’s no allowance. You wait until a specific account is clearly worthless, then record the bad debt expense at that point. This approach is simpler, but it creates a timing mismatch: the revenue might have been recorded months or years before the loss is recognized. That violation of the matching principle is why the direct write-off method doesn’t comply with GAAP for financial reporting.
Where it does matter is on your tax return. The IRS generally requires the specific charge-off approach for deducting bad debts, rather than the allowance method used in your financial statements. Many businesses maintain two parallel treatments as a result: the allowance method for their books and the direct write-off method for tax purposes.
How Businesses Measure A/R Performance
Two metrics dominate when businesses evaluate how well their collection process is working: the accounts receivable turnover ratio and days sales outstanding.
Accounts Receivable Turnover Ratio
The turnover ratio measures how many times per year a company collects its average receivable balance. Divide net credit sales by average accounts receivable for the period. If annual credit sales are $1.2 million and the average A/R balance is $200,000, the turnover ratio is 6, meaning you collect your receivables six times per year.
A higher number indicates faster collection and healthier cash flow. A declining ratio over time suggests customers are taking longer to pay, which could signal loose credit policies or deteriorating customer quality. The ratio is most useful when compared against your own historical performance or industry benchmarks, since what counts as “good” varies widely by sector.
Days Sales Outstanding
Days sales outstanding, or DSO, translates the turnover ratio into something more intuitive: the average number of days it takes to collect payment after a sale. The formula is your ending A/R balance divided by credit sales for the period, multiplied by the number of days in that period. If your DSO is 45 days and your standard payment terms are Net 30, that 15-day gap tells you customers are paying late on average.
DSO is particularly useful for spotting trends. A steadily climbing DSO quarter over quarter is an early warning sign of cash flow trouble even if revenue is growing. It means the sales team is booking deals but collections is falling behind.
Tax Treatment of Uncollected A/R
When a receivable becomes worthless, you may be able to deduct it as a business bad debt on your federal tax return. The IRS allows this deduction only in the year the debt actually becomes worthless, and you’ll need to show you took reasonable steps to collect before claiming the loss. A court judgment isn’t required, but you do need evidence that further collection efforts would be pointless.1Internal Revenue Service. Topic No. 453, Bad Debt Deduction
One requirement trips up many small businesses: you can only deduct a bad debt if the amount was previously included in your gross income. That matters because cash-basis taxpayers, which includes most sole proprietors and small businesses, never recorded the revenue from the unpaid invoice in the first place. Since they only recognize income when cash is received, an unpaid invoice was never income, so there’s nothing to deduct. The bad debt deduction for uncollected receivables is effectively limited to businesses using the accrual method of accounting.1Internal Revenue Service. Topic No. 453, Bad Debt Deduction
Businesses that do qualify report the deduction on the applicable business income tax return, such as Schedule C for sole proprietors. Partial worthlessness counts too: if you expect to recover some but not all of the amount owed, you can deduct the portion that’s genuinely uncollectible.
A/R Versus Notes Receivable
Accounts receivable and notes receivable are related but not the same. Standard A/R is relatively informal: a customer gets an invoice, owes the money, and pays within the agreed timeframe. A note receivable involves a signed promissory note that functions as a legal contract, often includes interest charges, and may extend well beyond one year. Because of the longer timeframe, notes receivable can be classified as either current or noncurrent assets, while A/R is almost always current.
The two sometimes overlap. When a customer can’t pay a standard invoice on time, businesses occasionally convert that receivable into a formal promissory note with new payment terms and interest. Notes receivable are also negotiable instruments, meaning the business holding the note can sell or transfer it to another party. Regular A/R doesn’t work that way.