Days Sales Outstanding (DSO)
Quick Definition
The average number of days it takes a company to collect payment after a sale, measuring accounts receivable efficiency.
Key Takeaways
- DSO = (Accounts Receivable ÷ Revenue) × Days in Period
- Lower DSO means faster cash collection from customers
- Rising DSO may signal credit quality issues or aggressive revenue recognition
- Compare DSO to credit terms to spot late payment patterns
- Key component of the cash conversion cycle calculation
What Is Days Sales Outstanding (DSO)?
Days sales outstanding (DSO) measures the average number of days it takes a company to collect payment from customers after making a sale. It is calculated as (Accounts Receivable ÷ Revenue) × Number of Days in the period. A lower DSO means the company collects cash more quickly, which is generally favorable for liquidity and working capital management.
DSO is a critical metric for companies that sell on credit (B2B companies, healthcare, construction, government contractors) because it directly impacts cash flow. A company with $10M in monthly revenue and a DSO of 60 days has roughly $20M tied up in receivables — money it has earned but hasn't yet received. If DSO increases from 45 to 75 days, that's an additional $10M in working capital required, which must be financed somehow.
For fundamental analysis, DSO trends are more important than absolute levels. Rising DSO might indicate that the company is extending more generous credit terms to win business (potentially lowering quality), customers are having trouble paying (credit risk), or revenue recognition might be aggressive (recognizing sales that haven't actually been collected). Conversely, declining DSO suggests improving collection efficiency or shifting toward customers who pay more quickly. Compare DSO to credit terms — if a company offers Net 30 terms but has a DSO of 60, many customers are paying late. Industry benchmarks vary widely: SaaS companies typically have DSOs of 30-50 days, while government contractors might have DSOs of 90-120 days. DSO is a key input in calculating the cash conversion cycle.
Days Sales Outstanding (DSO) Example
- 1A company with $30M in receivables and $120M in quarterly revenue has a DSO of 22.5 days.
- 2If a SaaS company's DSO rises from 35 to 55 days over two years, it may signal declining customer payment quality.
- 3Government contractors often have DSOs of 90+ days because federal payment processes are slow.
Related Terms
Accounts Receivable (AR)
Money owed to a company by its customers for goods or services delivered on credit, recorded as a current asset on the balance sheet.
Accounts Receivable Turnover
A financial ratio measuring how efficiently a company collects payments from customers, calculated by dividing net credit sales by average accounts receivable.
Cash Conversion Cycle (CCC)
The number of days it takes a company to convert its investments in inventory and other resources into cash from sales.
Working Capital
The difference between a company's current assets and current liabilities, measuring short-term financial health and operational efficiency.
Revenue
The total amount of money a company earns from its business activities before any expenses are deducted, also called sales or top line.
EBITDA (Earnings Before Interest, Taxes, Depreciation & Amortization)
A widely used profitability metric that strips out financing, tax, and non-cash capital costs to approximate operating cash generation.
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