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DSO Calculator
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Free tool

DSO Calculator

Calculate your days sales outstanding, benchmark it against healthy ranges, and see exactly how much working capital a lower DSO would free up. No sign-up, no email required.

Your DSO
51.1days
Room to improve
Daily credit sales$8,219
Cash freed at 40-day DSO$91,233
Cutting DSO from 51.1 to 40 days unlocks working capital that is currently tied up in unpaid invoices.
Annual cost of that cash (at 10%)$9,123
Yonovo automates follow-ups across email, SMS, and voice to collect faster.

How DSO is calculated

DSO = (Accounts Receivable / Total Credit Sales) × Number of Days

Days sales outstanding measures the average time between making a sale on credit and collecting the cash. Use 365 days for an annual figure, 90 for a quarter, or 30 for a month. A DSO that runs well above your payment terms is a sign that customers are paying late and cash is sitting in receivables instead of your bank account.

The headline number to watch is the cash you free up by lowering DSO. Every day you shave off DSO releases roughly one day of credit sales back into working capital. For a deeper model of when each invoice will actually be paid, read our cash collections formula guide, or see 7 proven ways to reduce DSO.

Frequently asked questions

Days sales outstanding (DSO) is the average number of days it takes to collect payment after a sale on credit. A lower DSO means you convert receivables into cash faster, which improves working capital and cash flow.
DSO = (Accounts Receivable / Total Credit Sales) x Number of Days in the period. For an annual figure, divide your accounts receivable by total credit sales for the year and multiply by 365. For a quarter, use 90 days; for a month, use 30.
It varies by industry and payment terms, but a common rule of thumb is that a DSO under 45 days is healthy, 45 to 60 days has room to improve, and above 60 days suggests cash is getting stuck in receivables. Compare against your own payment terms: if you bill Net 30 but your DSO is 55, customers are paying roughly 25 days late on average.
Send invoices promptly and accurately, set clear payment terms, follow up consistently across multiple channels before and after the due date, make paying easy, and escalate aging invoices on a schedule. Automating these follow-ups is the fastest lever for most teams. See our guide on how to reduce DSO for seven proven strategies.
Roughly your daily credit sales multiplied by the number of days you cut from DSO. If you bill $3M a year (about $8,200/day) and reduce DSO by 15 days, you free up around $123,000 in cash that was previously tied up in unpaid invoices. The calculator above estimates this for your numbers.

Stop chasing payments by hand

Yonovo follows up on every overdue invoice across email, SMS, and voice, so you collect faster and bring your DSO down without adding headcount.