What is Cash Conversion Cycle?
The Cash Conversion Cycle measures how long cash is tied up in operations. It combines three metrics: how long you hold inventory (DIO), how long customers take to pay (DSO), and how long you take to pay suppliers (DPO). Lower or negative CCC is better.
Why CCC Matters for Founders
CCC reveals your working capital efficiency. A 60-day CCC means you need to finance 60 days of operations before cash comes back. A negative CCC, like Amazon achieves, means you collect from customers before paying suppliers, essentially running on vendor financing.
For ecommerce founders, CCC determines how much working capital you need to scale. A high CCC means every dollar of growth requires proportionally more cash investment.
How to Calculate Cash Conversion Cycle Step by Step
Step 1: Calculate Days Inventory Outstanding (DIO). For SaaS companies, this is often zero or near-zero. For ecommerce, it measures how long products sit before selling.
- Average inventory: $120,000
- COGS (annual): $960,000
- DIO = ($120K ÷ $960K) × 365 = 45.6 days
Step 2: Calculate Days Sales Outstanding (DSO). How long until customers pay you.
- Accounts receivable: $80,000
- Average daily revenue: $4,000
- DSO = $80K ÷ $4K = 20 days
Step 3: Calculate Days Payable Outstanding (DPO). How long you take to pay your suppliers.
- Accounts payable: $95,000
- Average daily COGS: $2,630
- DPO = $95K ÷ $2,630 = 36.1 days
Step 4: Combine them.
- CCC = DIO + DSO - DPO = 45.6 + 20 - 36.1 = 29.5 days
Cash is tied up for about 30 days per cycle. You need to finance 30 days of operations between paying suppliers and collecting from customers.
Step 5: Find levers to improve.
- Negotiate longer payment terms with suppliers → increases DPO → lowers CCC
- Require upfront payment or faster collection → decreases DSO → lowers CCC
- Improve inventory turnover → decreases DIO → lowers CCC
For SaaS: Your CCC is often negative because customers prepay (monthly or annual subscriptions) while you pay vendors after 30 days. That's a built-in cash flow advantage.
Common mistakes founders make:
- Ignoring CCC because they're SaaS (even SaaS companies with enterprise invoicing can have CCC issues)
- Not separating DIO/DSO/DPO to see which component to improve
- Using annual averages when seasonality creates cash crunches at specific times
The Power of Negative CCC
Businesses with negative CCC can grow almost indefinitely without external capital because growth generates cash rather than consuming it. This is a massive competitive advantage.
Formula
Cash Conversion Cycle = DIO + DSO - DPO
DIO = Days Inventory Outstanding
DSO = Days Sales Outstanding
DPO = Days Payable Outstanding
Example
Your ecommerce company has:
- DIO: 45 days (inventory holding time)
- DSO: 30 days (customer collection time)
- DPO: 60 days (supplier payment time)
CCC = 45 + 30 - 60 = 15 days
Cash is tied up for only 15 days per cycle. If you could negotiate DPO to 75 days, you would hit zero CCC and need minimal working capital to grow.