Finance fundamentals
Cash Conversion Cycle (CCC)
The cash conversion cycle (CCC) measures how many days your cash is tied up in operations — from paying for inventory to collecting from customers. Formula: CCC = DIO + DSO − DPO (days inventory + days to collect − days you take to pay suppliers). Lower is better; negative means customers fund your operations.
CCC is the metric that connects three numbers most owners track separately — inventory, receivables, payables — into a single answer to the question that actually matters: how much working capital does running this business consume?
The formula and its three components
CCC = DIO + DSO − DPO
DIO — Days Inventory Outstanding
(Inventory ÷ COGS) × 365
How many days inventory sits before it sells. Cash leaves when you buy stock; nothing comes back until it moves.
DSO — Days Sales Outstanding
(AR ÷ Credit Sales) × 365
How many days after the sale you actually collect. Covered in depth in our DSO guide.
DPO — Days Payable Outstanding
(AP ÷ COGS) × 365
How many days you take to pay suppliers. This one subtracts — supplier terms delay your cash outlay.
Worked example: A specialty food retailer holds inventory 40 days before it sells (DIO), collects wholesale invoices in 35 days (DSO), and pays suppliers on Net 30 (DPO).
CCC = 40 + 35 − 30 = 45 days
Every operating dollar is committed for 45 days before it returns as collected revenue. If the business spends $10,000/month on inventory and operations, roughly $15,000 of cash (45 days ÷ 30 × $10,000) is permanently tied up just keeping the wheels turning — that is its working capital requirement.
The negative CCC: making customers fund your business
A negative cycle means cash comes in before it goes out. Amazon is the textbook case: a customer pays instantly at checkout, the inventory may have sat only days, and the supplier invoice is due weeks later. The company operates on its suppliers' money.
Collect at or before sale
Card payments, deposits, retainers, and subscriptions all pull DSO toward zero — the single biggest step toward a negative cycle.
Turn inventory fast (or hold none)
Service businesses skip DIO entirely. Retailers get there with tight purchasing and fast-moving product mix.
Negotiate supplier terms
Every extra day of DPO is a day of free financing. Moving key suppliers from Net 30 to Net 60 can flip a small positive cycle negative.
Why CCC decides how much cash you need to grow
Growth consumes working capital in proportion to your cycle. With a 45-day CCC, adding $20,000/month of new sales means roughly $30,000 of additional cash permanently committed to inventory and receivables before profit ever shows up. This is why profitable businesses run out of cash while growing — and why shortening the cycle is often worth more than raising prices. A business that cuts its CCC from 45 to 30 days frees a third of its working capital instantly, with no new revenue required.
To lower DIO
Cut slow-moving SKUs, order smaller and more often, forecast from actual sell-through
To lower DSO
Invoice same-day, take deposits, automate reminders — see the DSO guide
To raise DPO
Negotiate longer terms, pay on the due date (not early), consolidate suppliers for leverage
Frequently asked questions
What is a good cash conversion cycle?+
Shorter is better, and negative is best. A CCC of 30 means a dollar spent on operations comes back as collected revenue in about 30 days. What's achievable depends on your model: retailers with fast-moving inventory and card payments can run very short or negative cycles, while manufacturers holding raw materials on Net 60 customer terms may run 60-100+ days. Track your own trend quarter over quarter rather than chasing a universal number.
What does a negative cash conversion cycle mean?+
A negative CCC means you collect cash from customers before you pay your suppliers — customers effectively finance your operations. Amazon and Walmart are the classic examples: they sell inventory (collecting immediately) before supplier invoices come due. Any business that collects upfront and pays suppliers on terms — subscriptions, deposits, fast-turn retail — can achieve it.
How is the cash conversion cycle different from the operating cycle?+
The operating cycle is DIO + DSO — how long from buying inventory to collecting the sale. The cash conversion cycle subtracts DPO, recognizing that supplier terms delay your actual cash outlay. Operating cycle measures the business process; CCC measures how long your own cash is out the door.
How do you calculate CCC for a service business with no inventory?+
Drop the inventory term: CCC = DSO − DPO. A consulting firm that collects invoices in 45 days (DSO) and pays its own bills in 30 days (DPO) has a 15-day cycle. Service businesses that bill deposits upfront can easily run negative cycles — one of the structural cash flow advantages of service models.
Why did my cash conversion cycle get longer?+
One of three things moved against you: inventory is sitting longer (DIO up — overbuying or slowing sales), customers are paying slower (DSO up), or you're paying suppliers faster (DPO down — often after losing negotiated terms). Calculate all three components separately to find which one moved; each has a different fix.
Related tools and guides
Deep dive on the collection component, with 5 tactics to speed it up.
The times-per-year view of your collection efficiency.
The foundation: how receivables and payables work together.
Calculate DIO — how many days inventory sits before selling.
Project monthly cash flow and see if you'll run out of cash.
Calculate the working capital your cycle actually requires.