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 yet been paid for. It sits on your balance sheet as a current asset because you expect to convert it into cash within the next 12 months. If you invoiced $50,000 last month on credit terms and collected $30,000, at least $20,000 of that stays on your books as A/R until the customer pays.
The number matters beyond bookkeeping. It shapes your cash flow, your tax bill, and how lenders read your financial health. Getting it wrong distorts every one of those in ways that compound.
What Feeds Into the Balance
Every unpaid customer invoice adds to your A/R balance. When you ship a product or finish a job and bill the customer instead of collecting on the spot, you’ve made a credit sale. Your company is the creditor, the customer is the debtor, and the invoice sits in A/R until they settle up. Most business-to-business transactions work this way, with payment terms (Net 30, Net 60, and so on) spelling out how long the customer has.
The A/R balance aggregates every one of those open invoices into a single figure. A company with 200 customers owing varying amounts on different timelines has one A/R total that captures all of it. But the pieces matter as much as the sum: $500,000 spread across 200 customers paying on time is a very different situation from $500,000 concentrated in five accounts 90 days late.
How to Calculate the Ending Balance
The formula for any period is straightforward:
Ending A/R = Beginning A/R + New Credit Sales − Payments Received − Credits and Adjustments
Start with whatever was outstanding at the beginning of the period. Add every new credit sale you invoiced. Subtract customer payments that came in, plus any credits issued for returns, billing errors, or negotiated discounts. What’s left is the ending balance.
An example: 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 easy. The hard part is making sure every invoice, payment, and adjustment gets recorded. A single missed payment entry inflates A/R and throws off cash projections, which is why accountants reconcile the subsidiary ledger to the general ledger at least monthly.
Why the Total Alone Is Misleading
A single A/R number hides the age of the debts behind it. An aging schedule sorts every open invoice into time buckets based on how many days have passed since the invoice date:
- Current (0–30 days): still within normal payment terms.
- 31–60 days: slightly past due, often slow payers or processing delays.
- 61–90 days: a real collection concern that needs follow-up.
- Over 90 days: highest risk of non-payment, often headed for write-off consideration.
The distribution matters more than the total. 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 the absolute number. Aging data also feeds directly into your reserve estimates: the older an invoice gets, the less likely you’ll collect it, so a company might reserve 1% against current invoices but 50% against anything over 90 days.
Measuring How Fast You Collect
Two ratios take the aging picture and reduce it to a benchmark.
Days Sales Outstanding
Days Sales Outstanding (DSO) is the average number of days between invoicing and collection:
DSO = (Average Accounts Receivable ÷ Net Revenue) × 365
A DSO of 35 means you’re collecting, on average, about five weeks after the invoice goes out. Cross-industry benchmarks show top performers collect in 30 days or less, the median sits near 38 days, and companies at 46 days or longer fall into the bottom tier. Context matters: 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
The turnover ratio tells you how many times per year you collect your average A/R balance:
A/R Turnover = Net Credit Sales ÷ Average Accounts Receivable
A ratio of 12 means you’re cycling through receivables roughly once a month. Higher generally signals efficient collection and creditworthy customers. A declining ratio over several quarters is a warning that customers are paying more slowly or that you’ve extended credit to buyers who can’t keep up.
A/R and Cash Are Not the Same Thing
This is where A/R trips up growing businesses. Revenue on the income statement and cash in the bank are different numbers. You can book $1 million in sales, report a healthy profit, and still run out of money if customers haven’t actually paid. When A/R grows faster than collections, more of your capital is locked in unpaid invoices instead of available 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. That’s the accounting system’s way of saying you earned the revenue but haven’t received the money yet. A business that watches its income statement and ignores A/R trends can be profitable on paper and insolvent in practice. It’s the single most common cash flow mistake in growing companies, and regular monitoring prevents it.
Tax Treatment Depends on Your Accounting Method
The tax implications of A/R turn almost entirely on whether your business uses cash-basis or accrual-basis accounting.
Accrual-Basis Businesses
Under 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.1Internal Revenue Service. Publication 538, Accounting Periods and Methods In practice, you owe tax on a credit sale when you deliver the goods or finish the service and invoice, not when the customer pays. Your A/R balance represents income you’ve already been taxed on but haven’t collected, which creates a real squeeze if customers are slow.
Cash-Basis Businesses
Cash-method taxpayers report income when they receive it. Send an invoice in December, get paid in February, and the income falls into the next 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 reasonable collection efforts before writing it off. Cash-basis taxpayers generally cannot deduct unpaid invoices because the income was never reported in the first place.2Internal 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.
Reserving for Losses: The Allowance and CECL
Some invoices never get paid. Under GAAP, companies maintain an Allowance for Doubtful Accounts, a contra-asset that offsets gross A/R down to what you actually expect to receive (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.
Since January 2023, virtually all companies, including smaller reporting entities and private businesses, must estimate their 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 conditions, and reasonable forecasts about collectability over the remaining life of the receivable.3Board of Governors of the Federal Reserve System. Frequently Asked Questions on the New Accounting Standard on Financial Instruments – Credit Losses CECL doesn’t mandate one calculation method; for most small businesses with straightforward receivables, a loss-rate method based on aging buckets remains the simplest approach.
Turning A/R Into Cash Before Customers Pay
Sometimes waiting isn’t an option. Two financing tools pull cash out of the A/R balance before invoices come due.
Invoice Factoring
Factoring means 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 get the remainder minus the factor’s fee. Factoring fees generally run 1% to 5% of the invoice value per month, and your customers know a third party is involved because the factor contacts them for payment.
Asset-Based Lending
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 that want lower annualized financing costs and want to keep customer relationships undisturbed.
How Long You Can Legally Collect
Every state imposes a statute of limitations on debt collection for written contracts, and the window ranges from 3 to 15 years, with 6 years the most common. Once that window closes, you lose the ability to enforce the debt in court, even if the customer clearly owes the money. In some jurisdictions, a partial payment restarts the clock, which is worth knowing when negotiating with a long-delinquent account.
One point that catches some business owners off guard: the federal Fair Debt Collection Practices Act, which restricts how and when debt collectors can contact people, applies only to consumer debts incurred for personal, family, or household purposes. It does not cover business-to-business receivables.4Consumer Financial Protection Bureau. Fair Debt Collection Practices Act (FDCPA) Procedures B2B creditors have more flexibility in collection methods, though state-level fair business practices laws still apply.