An accounts receivable balance, often shortened to A/R balance, is the total amount of money your customers owe you for goods or services you’ve already delivered but haven’t been paid for yet. It lives on the balance sheet as a current asset because the business expects to convert it to cash, usually within a year. If you invoiced $50,000 in credit sales last month and collected $30,000, at least $20,000 remains in your A/R, on top of anything already outstanding from earlier periods.
Every unpaid customer invoice feeds into that number. When you ship a product or finish a job and send an invoice instead of taking payment on the spot, you’ve made a credit sale: your company becomes the creditor, the customer becomes the debtor, and the amount owed sits in A/R until it’s paid. Most business-to-business transactions work this way.
How the A/R Balance Is Calculated
The ending A/R balance for any period follows a simple formula:
Ending A/R = Beginning A/R + New Credit Sales − Payments Received − Credits and Adjustments
Start with what was outstanding at the beginning of the period. Add every new credit sale invoiced during the period. Subtract payments that came in, and subtract any credits issued for returns, billing errors, or negotiated discounts. What’s left is your ending balance.
A quick example. Your A/R starts the month at $80,000. You invoice $45,000 in new credit sales. Customers pay $52,000, and you issue $3,000 in credits for returned merchandise. Ending A/R is $80,000 + $45,000 − $52,000 − $3,000 = $70,000.
The math is straightforward. The hard part is making sure every invoice, payment, and adjustment actually gets recorded. One missed payment entry inflates the balance and distorts your cash flow projections, which is why accountants reconcile the subsidiary ledger (the customer-by-customer detail) to the general ledger at least monthly.
Where A/R Sits on Your Financial Statements
A/R appears on the balance sheet as a current asset, meaning it represents money expected to convert into cash within 12 months or one operating cycle. It typically sits near the top of the asset section because it’s more liquid than inventory, equipment, or real estate. Lenders and investors read this line to gauge how much revenue is still waiting to arrive as actual cash.
Tracking the individual pieces matters as much as the total. A $500,000 balance spread across 200 customers paying on time is very different from a $500,000 balance concentrated in five accounts that are 90 days late. The headline number alone doesn’t tell you which situation you’re in.
Why the Age of the Balance Matters
A single A/R total hides the age of the debts behind it. An aging schedule fixes that by sorting every open invoice into time buckets based on how many days have passed since the invoice date. Standard buckets look like this:
- Current (0–30 days): invoices still within normal payment terms.
- 31–60 days: slightly past due, often slow payers or processing delays.
- 61–90 days: a genuine collection concern that warrants direct follow-up.
- Over 90 days: the highest risk of non-payment, often requiring escalated collection efforts or write-off consideration.
The distribution across these buckets tells you more than the total does. If 85% of your A/R sits in the current bucket, the portfolio is healthy. If 30% has drifted past 60 days, you have a cash flow problem developing regardless of how large the overall balance is.
Days Sales Outstanding
Days Sales Outstanding (DSO) measures the average number of days it takes to collect payment after a sale:
DSO = (Average Accounts Receivable ÷ Net Revenue) × 365
A DSO of 35 means you’re collecting, on average, about five weeks after invoicing. Cross-industry benchmarks show top-performing companies collecting in 30 days or less, with the median around 38 days and the bottom tier at 46 days or more. What counts as “good” varies by industry. A construction firm with 60-day terms and a 55-day DSO is doing fine; a retail distributor with the same number probably has a collections problem.
Accounts Receivable Turnover Ratio
The turnover ratio tells you how many times per year your company collects its average A/R balance:
A/R Turnover = Net Credit Sales ÷ Average Accounts Receivable
A ratio of 12 means you cycle through receivables roughly once a month. Higher generally signals efficient collection and creditworthy customers. A declining ratio over several quarters is a warning sign that customers are paying more slowly or that credit has been extended to buyers who struggle to pay.
The Allowance for Doubtful Accounts
Not every invoice gets paid. Under GAAP, companies maintain an Allowance for Doubtful Accounts, a contra-asset that offsets the gross A/R balance down to what the company actually expects to receive (called the net realizable value). When a specific invoice is finally deemed uncollectible, it gets written off against this allowance rather than hitting the income statement as a sudden expense.
Aging data feeds directly into the allowance estimate. The older an invoice gets, the less likely you are to collect it, so the reserve percentages applied to each bucket increase with age. A company might reserve 1% against current invoices and 50% against anything over 90 days.
Since January 2023, virtually all companies, including smaller reporting entities and private businesses, must estimate allowances using the Current Expected Credit Losses (CECL) methodology under FASB ASU 2016-13. The older approach only recognized losses that had already been incurred. CECL requires forward-looking estimates that account for historical loss experience, current economic conditions, and reasonable forecasts about future collectability over the remaining life of the receivable.1Board of Governors of the Federal Reserve System. Frequently Asked Questions on the New Accounting Standard on Financial Instruments – Credit Losses CECL doesn’t mandate a single calculation method; loss-rate analysis based on aging buckets remains the simplest approach for most small businesses with straightforward receivables.
How A/R Affects Your Cash Flow
Revenue on the income statement and cash in the bank are not the same thing. A company can book $1 million in sales, report a healthy profit, and still run out of cash if customers haven’t actually paid. When A/R grows faster than collections, more of the company’s capital is locked in unpaid invoices and unavailable for payroll, inventory, or debt service.
On the cash flow statement, an increase in A/R during the period shows up as a reduction in operating cash flow. The accounting system is saying: you earned this revenue, but you haven’t received the money yet. A business that watches its income statement without tracking A/R trends can end up profitable on paper and insolvent in practice.
Tax Treatment of A/R
The tax impact depends almost entirely on whether your business uses cash-basis or accrual-basis accounting.
Accrual-Basis Businesses
If you use the accrual method, the IRS requires you to include income in the tax year when the all-events test is met: all events have occurred that fix your right to receive the income, and you can determine the amount with reasonable accuracy.2Internal Revenue Service. Publication 538, Accounting Periods and Methods In practice, you owe tax on a credit sale when you deliver the goods or complete the service and send the invoice, not when the customer pays. Your A/R balance represents income you’ve already been taxed on but haven’t collected yet, which creates a real cash squeeze when customers pay slowly.
Cash-Basis Businesses
Cash-method taxpayers report income when they receive it. If you send an invoice in December but don’t get paid until February, the income falls into the following tax year. Most sole proprietors and small service businesses use this method specifically to avoid the mismatch between taxable income and actual cash on hand.
Deducting Bad Debts
When a receivable becomes truly uncollectible, accrual-basis businesses can deduct it as a bad debt expense, but only if the amount was previously included in gross income. The deduction is taken in the year the debt becomes worthless, and you need to show you took reasonable steps to collect before writing it off. Cash-basis taxpayers generally cannot take a bad debt deduction for unpaid invoices because the income was never reported in the first place.3Internal Revenue Service. Topic No. 453, Bad Debt Deduction Business bad debts are reported on Schedule C for sole proprietors or on the applicable business return for other entity types.
Turning A/R Into Cash Early
Sometimes waiting for customers to pay isn’t an option. Two common financing tools let businesses pull cash out of the A/R balance before invoices are due.
Invoice factoring involves selling your invoices outright to a factoring company. The factor advances a percentage of the invoice value upfront, typically 70% to 90%, then collects directly from your customer. Once the customer pays, you receive the remainder minus the factor’s fee. Fees generally run between 1% and 5% of the invoice value per month, and your customers know a third party is involved because the factor contacts them directly for payment.
Asset-based lending (ABL) uses your receivables as collateral for a revolving line of credit rather than selling them. The lender sets a borrowing base, usually 75% to 90% of eligible A/R, and you draw against that amount as needed. Your customers never know the lender exists because you continue handling collections yourself. ABL typically requires more financial documentation and a track record, making it better suited for established businesses.
Factoring tends to work for newer or smaller businesses that need cash fast and can absorb the higher per-invoice cost. ABL fits larger companies with predictable receivables that want lower annualized financing costs and prefer to keep customer relationships undisturbed.