What is the cash conversion cycle (and why it matters)

Profit and cash are not the same thing. You can book a sale today and not see the cash for 60 days — meanwhile you've already paid for the inventory and the labor. The cash conversion cycle (CCC) measures exactly this gap: how many days your cash is locked up in the business before it comes back as cash.

It's one of the most useful — and most ignored — numbers a small business can track.

The formula

Cash Conversion Cycle = DSO + Inventory Days − DPO

Three pieces:

1. DSO (Days Sales Outstanding) = accounts receivable ÷ revenue × 365. How long customers take to pay you.
2. Inventory Days = inventory ÷ COGS × 365. How long inventory sits before it's sold. (Service businesses with no inventory can treat this as zero.)
3. DPO (Days Payable Outstanding) = accounts payable ÷ COGS × 365. How long you take to pay suppliers.

You add the time cash is tied up in receivables and inventory, then subtract the time you get to hold onto cash by paying suppliers later.

A worked example

Say a small distributor has:

• DSO of 45 days
• Inventory days of 60
• DPO of 50

Their CCC = 45 + 60 − 50 = 55 days. That means, on average, the company funds 55 days of operations out of its own pocket before the cash cycles back. If sales grow quickly, that 55-day gap grows too — which is why fast-growing businesses can run out of cash even while profitable.

Why a lower (or negative) CCC is better

A shorter cycle means less working capital tied up and more cash free for payroll, growth, or a buffer. Some businesses even achieve a negative CCC — they collect from customers before they pay suppliers (think subscriptions billed up front). That's a powerful position: customers effectively finance operations.

How to shorten your cash conversion cycle

• Collect faster (lower DSO): invoice immediately, offer easy payment methods, set clear terms, and follow up on overdue invoices systematically.
• Hold less inventory (lower inventory days): tighten reorder points, drop slow movers, and avoid over-buying on "deals" that sit on the shelf.
• Pay strategically (reasonable DPO): use the full payment terms you've negotiated — without straining supplier relationships or missing early-payment discounts that are worth more than the float.

Watch the trend

A single CCC number is useful; the trend is more useful. If your cycle is creeping from 55 to 70 days over a few quarters, cash is getting tighter even if the P&L looks fine. That's the kind of quiet deterioration a financial-health scorecard is built to catch.

HealthGauge calculates your DSO, DPO, inventory days, and cash conversion cycle automatically from QuickBooks Online, charts the trend, and flags it when the cycle is lengthening. See it on sample data.