The cash conversion cycle: end-to-end view
The cash conversion cycle measures how many days pass between paying a supplier and receiving cash from the customer for the resulting sale. CCC = DSO (days sales outstanding, how long customers take to pay) + DIO (days inventory outstanding, how long stock sits) − DPO (days payable outstanding, how long you take to pay suppliers).
Lower CCC means faster cash recycling and less working-capital funding needed for growth. A CCC of 30 days on €1M monthly revenue means roughly €1M tied up at any time; cut it to 15 days and you free €500k. For high-growth companies, CCC optimization is often more impactful than any single fundraising round.
Each lever: DSO, DIO, DPO
DSO (Days Sales Outstanding): days × accounts receivable ÷ revenue. Reduce via clearer terms (state due date prominently, not vague 'net 30'), part-payment up front for large projects, automated reminders, early-payment discounts (2% if paid within 10 days), monthly direct debit for recurring billing. Each 5-day DSO reduction on €5M revenue frees roughly €70k cash.
DIO (Days Inventory Outstanding): days × inventory ÷ COGS. Reduce via SKU rationalization (most retailers carry 30–40% SKUs generating <5% revenue), better forecasting, supplier consignment for slow-movers, just-in-time replenishment for fast-movers. DPO (Days Payable Outstanding): days × accounts payable ÷ COGS. Extend cautiously — beyond 45–60 days you damage supplier relationships and may lose volume discounts.
The growth trap: how scaling drains cash
The fundamental SME cash trap: growing revenue requires proportional working capital. If your operational working capital (receivables + inventory − payables) is 20% of revenue, growing from €5M to €10M revenue requires an additional €1M in working capital — usually more cash than the company generates from operations even at 15% net margin.
Three responses: improve CCC to reduce working capital intensity (free internal cash); raise external capital (debt or equity) sized to fund growth; or grow slower so internal cashflow covers working capital needs. Most SMEs that fail during growth chose the third unconsciously, then tried the first too late, and ran out of cash before the second could be arranged. Build a 12-month rolling cashflow forecast and track working capital weekly — it's the single most predictive financial metric.
Calculate your cash conversion cycle
Enter receivables, inventory, payables and revenue — the EuroCalc working capital calculator returns DSO, DIO, DPO and CCC instantly.
Open the calculator →Frequently asked questions
What's a healthy working capital ratio?+
Current ratio (current assets ÷ current liabilities) of 1.5–2.5 is typical for healthy SMEs. Below 1.0 suggests liquidity risk; above 3.0 may suggest over-capitalization or poor cash deployment.
How do I shorten DSO without losing customers?+
Invoice immediately (not month-end), state terms clearly, automate reminders at +1, +7, +14 days after due, and use direct debit for recurring billing. For new customers, require 25–50% upfront on first orders. Avoid heavy-handed collection on long-tenured customers — relationship damage is rarely worth a few days.
Should I take supplier early-payment discounts?+
Almost always if the implied annual rate exceeds your cost of capital. A 2% discount for paying 20 days early implies an annual rate of ~37% — better than almost any other use of cash if you have liquidity.
What about factoring or invoice financing?+
Useful for bridging seasonal gaps or one-off large contracts; expensive (1.5–3.5% of invoice value, equivalent to 12–25% APR) as a permanent funding source. Use sparingly and prefer asset-based credit lines for ongoing working capital needs.
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