Accounts Receivable Turnover & DSO Calculator

The Formulas

Turnover tells you how many times a year you collect your entire receivables balance. DSO converts that into the number most people find easier to act on: the average days between raising an invoice and getting paid.

The Number Owners Underestimate

The Cash Beyond Terms figure is the one worth sitting with. It is the amount of your money customers are holding purely because they pay later than they agreed. On $1.8M of annual sales, every single day of DSO is roughly $4,900. Running 20 days past terms means nearly $100,000 of your cash is financing your customers' businesses, interest-free, permanently.

Put differently: cutting DSO by ten days on those numbers releases $49,000 in one-off cash without selling anything more, raising a price, or borrowing. There is almost no other lever in a small business that produces that much cash that quickly.

How to Actually Reduce DSO

• Invoice the same day. A surprising share of slow payment is slow invoicing. Nothing starts the clock until the invoice goes out.
• Make terms unambiguous on every invoice — a due date, not "net 30", and the payment methods you accept.
• Chase before due, not after. A short reminder three days ahead of the due date outperforms three chasers afterwards.
• Take card and ACH. Processing fees are almost always cheaper than the cash cost of waiting.
• Escalate on a schedule everyone knows about, rather than when someone remembers.
• Deposits on large jobs. The cheapest receivable is one that never exists.

Read It Against Payables

DSO on its own is only half the picture. If you collect in 45 days and pay suppliers in 30, you are funding a 15-day gap out of working capital on every cycle. The businesses with the strongest cash positions are usually the ones that manage both sides deliberately. Check your liquidity position with our current ratio calculator.

Frequently Asked Questions

What is a good DSO?

Compare it to your own terms, not to a benchmark. If you offer net 30 and your DSO is 38, that is respectable. If it is 65, you have a collections problem regardless of what your industry average happens to be.

Should I use total sales or credit sales?

Credit sales only. Including cash sales that were never a receivable understates DSO and makes collections look better than it is. If you sell on both terms, split them.

Why average receivables rather than the closing balance?

A single closing balance can be distorted by one large invoice raised near period end. Averaging the opening and closing balances smooths that out and gives a more representative figure.

Is offering an early payment discount worth it?

Do the arithmetic before offering one. A 2% discount for paying 20 days early is an effective annual cost of over 36%. That is worth paying only if the cash is genuinely urgent or your borrowing costs are higher.