Understanding Accounts Receivable Days (DSO)
Days Sales Outstanding (DSO) measures how efficiently a business collects revenue after making a credit sale. It is calculated by dividing the accounts receivable balance by average daily revenue. A lower DSO means faster cash conversion; a higher DSO indicates slow-paying customers or weak collections processes.
The Association of Finance Professionals (AFP) 2024 Benchmarking Survey found median DSO across US industries is 36 days, with financial services at 28 days and construction at 67 days.
DSO Benchmark by Industry (2024)
| Industry | Median DSO | Best-in-Class |
|---|---|---|
| Software / SaaS | 28 days | 15 days |
| Manufacturing | 42 days | 30 days |
| Healthcare | 45 days | 32 days |
| Construction | 67 days | 48 days |
| Retail (B2B) | 35 days | 22 days |
The DSO Formula
DSO = \frac{\text{Accounts Receivable}}{\text{Revenue}} \times \text{Period Days}
Why DSO Matters for Cash Flow
Each day of DSO represents cash trapped in unpaid invoices. For a business with $5M annual revenue, reducing DSO from 50 to 40 days releases:
\text{Cash Released} = \frac{\$5{,}000{,}000}{365} \times 10 = \$136{,}986
Strategies to Reduce DSO
- Tighten credit terms: Move from Net-60 to Net-30 for new customers
- Early payment discounts: Offer 2/10 Net-30 (2% discount if paid within 10 days)
- Automated reminders: Send invoice reminders at 7, 14, and 30 days overdue
- Invoice factoring: Sell receivables for immediate cash at a small discount
- Upfront deposits: Require 30–50% payment before project commencement