If you've never calculated your Days Sales Outstanding (DSO), it's worth five minutes — it's the one number that tells you, precisely, how much of your own money is currently sitting in your clients' bank accounts instead of yours.
How to calculate it
DSO = (Total Accounts Receivable ÷ Total Credit Sales) × Number of Days
In plain terms: take everything currently owed to you, divide it by your total sales over a period, and multiply by the number of days in that period. The result is the average number of days it takes you to collect payment after a sale.
What a "normal" DSO looks like
There's no single healthy number — it depends on your payment terms — but as a benchmark, 55% of all B2B invoices in the US are paid late, and average DSO across US and Canadian businesses sits around 51–52 days — Crestmont Capital. If your terms are Net 30 and your DSO is 51 days, that's three extra weeks of your cash tied up in receivables, every single cycle.
The average small business is currently owed more than $17,000 in unpaid invoices at any given time — Crestmont Capital — and the hidden cost of that gap (late fees you don't charge, interest on capital you have to borrow instead, and the time spent chasing) averages around $39,000 per company per year.
Why DSO matters more than "am I profitable"
A business can be fully profitable on paper and still run out of cash, because profit is measured on invoices issued, not invoices collected. DSO is the metric that exposes that gap before it becomes a real crisis — a rising DSO is often the earliest warning sign of a cash flow problem, well before the bank balance shows it.
How to actually bring DSO down
A combination of faster invoicing, clearer terms, and systematic follow-up can realistically cut DSO by 15–30 days — Beancount, 2026. In practice that means:
- Shorter, clearer payment terms — see how Net 30 terms affect your own cash position before defaulting to them.
- Invoicing immediately, not in a weekly batch — every delay before you send is added straight onto your DSO.
- A fixed reminder cadence that runs the moment an invoice goes overdue, not whenever you get around to it.
- A frictionless payment method included on every invoice and every reminder.
Automation compounds these gains: businesses that automate more than half of their accounts receivable process report a 32% reduction in DSO — roughly 19 days — ResolvePay.
The gap most small businesses never close
Despite the upside, only 17% of small firms have adopted meaningful AR automation — PYMNTS — largely because "AR automation" sounds like enterprise software built for finance teams, not solo freelancers. AutoChase exists for the other 83%: turn on auto-chase for an invoice and it handles the reminder cadence automatically, cutting your effective DSO without hiring anyone or learning new software. Free for up to 3 invoices, no card required.