Balance sheet · Working capital
Accounts Receivable: Definition, Formula & DSO Analysis
Accounts receivable is the money customers owe a company for goods or services already delivered — a current asset sitting between a sale and the cash that settles it. How quickly a company converts receivables into cash is one of the most revealing signals about earnings quality, customer creditworthiness, and cash conversion efficiency. Days Sales Outstanding (DSO) is the key ratio that quantifies this lag, and understanding what drives it is essential for reading any balance sheet or cash flow statement.
Accounts receivable (AR) is money customers owe a company for goods or services already delivered — a current asset on the balance sheet. Key metric: Days Sales Outstanding = (AR ÷ Revenue) × 365. Apple (AAPL) FY2024: $33B AR ÷ $391B revenue = 31 days DSO, well below the ~45-day S&P 500 median.
What Is Accounts Receivable?
Accounts receivable (AR) represents the amount customers owe a company for goods or services that have already been delivered but not yet paid for. When a business sells on credit — invoicing a customer today for payment due in 30 or 60 days — it records the invoice amount as accounts receivable on the balance sheet. AR is classified as a current asset because it is expected to convert to cash within the next twelve months.
From an accounting perspective, revenue is recognized when the sale occurs, not when cash is collected. That timing difference creates accounts receivable: the company has earned the revenue and booked it on the income statement, but the cash has not yet arrived. When the customer pays, the AR balance decreases and cash increases — a transfer within current assets. AR is also the largest component of working capital for most businesses that sell on credit, which is why it matters so much for cash conversion analysis.
Investors should track AR relative to revenue over time. If AR grows faster than revenue, the company is either extending more credit to customers, experiencing payment delays, or — in the worst case — recognizing revenue prematurely. Any of these scenarios can signal earnings quality problems before they appear in the income statement.
The DSO Formula
Days Sales Outstanding (DSO) measures how many days on average a company takes to collect payment after a sale. A lower DSO means faster cash collection; a higher DSO means more working capital is tied up in unpaid invoices.
- Days Sales Outstanding (DSO)
- (Accounts Receivable ÷ Revenue) × 365. Measures the average collection period in days. Lower is faster; rising DSO is a yellow flag.
- AR Turnover Ratio
- Revenue ÷ Average Accounts Receivable. Measures how many times AR cycles through in a year. Higher is better — it means customers pay quickly and capital is not trapped in receivables.
- Apple (AAPL) FY2024 Example
- $33B AR ÷ $391B revenue × 365 = 31 days DSO. AR Turnover = $391B ÷ $33B = 11.8×. Apple collects nearly 12 times per year — exceptionally fast for a company with significant enterprise sales.
Note that some analysts use average AR (beginning + ending AR ÷ 2) in the turnover formula to smooth out seasonality. For DSO, using ending AR against annual revenue is the most common convention in 10-K analysis. The cash conversion cycle extends DSO by adding inventory days and subtracting days payable outstanding — connecting AR efficiency to the full operating cycle.
What DSO Tells Investors
DSO is a proxy for earnings quality: a lower DSO means revenue converts to cash quickly, which is the hallmark of a high-quality business. Rising DSO warrants investigation.
| DSO Range | Signal | What to check |
|---|---|---|
| <30 days | Fast-pay — strong cash conversion | Typical for consumer retail, SaaS with annual upfront billing, or businesses with strong customer leverage |
| 30–60 days | Typical — standard net-30 or net-45 terms | Normal B2B credit terms; compare to peers and trend over time to spot deterioration |
| >60 days | Investigate — slow or stressed collections | Could signal customer payment stress, lenient credit terms to boost sales, or aggressive revenue recognition — all require scrutiny |
A sudden jump in DSO is more concerning than a consistently high figure. If a company abruptly extends payment terms to hit a quarterly revenue target, DSO spikes while cash flow from operations lags — that divergence between net income and operating cash flow is one of the classic earnings quality red flags. Always compare AR growth to revenue growth on a trailing-twelve-month basis.
Sector Benchmarks: Typical DSO by Industry
DSO benchmarks vary widely by industry — a 60-day DSO that would alarm a retailer is perfectly normal in healthcare or industrial distribution. Compare within sectors, not across them.
| Sector | Typical DSO | Why |
|---|---|---|
| Technology | ~30 days | Mix of consumer (near-zero AR) and enterprise (net-30 to net-60); SaaS with annual prepay pulls the average down |
| Healthcare | ~45 days | Insurance reimbursement cycles create natural collection delays; hospitals and medical suppliers often extend net-45 or longer |
| Industrial | ~50 days | B2B sales with standard net-30/net-60 payment terms; government and defense contracts can push DSO higher |
| Retail | ~20 days | Consumers pay at point-of-sale; AR is minimal and mostly credit card settlements typically processed within 2–3 business days |
| Financial Services | n/a | Banks and insurers hold loans and premiums receivable rather than trade AR — DSO is not a meaningful metric for financial companies |
For live AR turnover data on any ticker, use the receivables turnover screener — it pulls current financials so you can compare any company to its sector peers in real time.
Accounts Receivable vs. Deferred Revenue
Accounts receivable and deferred revenue are mirror images — they are both balance sheet timing adjustments, but they point in opposite directions.
Accounts receivable means the company has already earned the revenue (the good or service was delivered) but has not yet been paid. Revenue is on the income statement; cash has not arrived. This is a current asset — the company is owed money.
Deferred revenue (also called unearned revenue) means the company has already been paid but has not yet earned the revenue — the good or service has not yet been delivered. The cash is in the bank; the income statement entry comes later. This is a current liability — the company owes the customer a future deliverable.
From an investor's perspective, these carry opposite quality signals. Rising deferred revenue is generally a positive sign — customers are prepaying, which means the business has strong pricing power and predictable future revenue. Rising AR is a cautionary sign — revenue is being booked before cash arrives, and if collections slow, those receivables may need to be written down. Understanding which direction the balance sheet is moving helps diagnose whether reported earnings lead or lag cash flow.