Cash conversion cycle calculator

How the cash conversion cycle is calculated

CCC = DSO + DIO − DPO

The cash conversion cycle measures how many days pass between spending cash to acquire inventory and receiving cash from customers who bought that inventory. It ties together three efficiency metrics:

• DSO (days sales outstanding): how long your business waits to collect payment after making a sale.
• DIO (days inventory outstanding): how long inventory sits on the shelf before being sold.
• DPO (days payable outstanding): how long you take to pay suppliers after receiving their invoice.

DSO and DIO represent days that cash is tied up in the business. DPO represents days that suppliers are effectively funding your operations. Subtracting DPO captures the offset: the longer you hold supplier invoices, the less of the cycle you personally need to fund.

A lower CCC means the business converts its investments into cash faster and needs less working capital to sustain operations. A negative CCC — common in grocery, fast food, and subscription businesses — means suppliers are funding operations: the business collects cash before it pays for the inventory that generated the sale.

CCC benchmarks

Three levers to shorten the CCC

Each component is an independent lever:

• Reduce DSO: invoice faster, offer early-payment discounts, tighten credit terms, or use invoice factoring to convert receivables to immediate cash.
• Reduce DIO: improve demand forecasting, order more frequently in smaller quantities, eliminate slow-moving SKUs.
• Increase DPO: negotiate net-45 or net-60 terms with suppliers, consolidate purchases to gain leverage, use a business credit card for purchases to add float without breaching supplier terms.

Worked examples

Example 1 — restaurant: A restaurant collects cash at point of sale (DSO ≈ 2 days including tips and card settlement), turns inventory every 7 days (DIO = 7), and pays its food distributors on net-21 terms (DPO = 21).

At $2,000/day in revenue, the negative CCC means the restaurant holds roughly $24,000 in supplier float at any given time — cash it collected from customers before the food bill is due. This is why restaurants can operate with minimal working capital reserves compared to businesses that carry inventory for months.

Example 2 — HVAC contractor: An HVAC contractor invoices customers on net-30 terms (DSO = 42 days actual), carries parts inventory for about 30 days (DIO = 30), and pays its distributors in 30 days (DPO = 30).

At $1,500/day in revenue, the contractor needs roughly $63,000 in working capital to fund its cycle — cash laid out for parts and labor before customers pay. A business line of credit sized at one to two months of revenue is the standard solution. Reducing DSO from 42 to 30 days (by requiring payment on completion) would save $18,000 in required working capital.

Assumptions and limitations

• All three inputs are averages. DSO, DIO, and DPO each represent averages over a period. Point-in-time snapshots — especially near quarter-end or year-end — can distort each input and therefore the CCC. Use rolling averages where possible.
• Service businesses without inventory. A pure service business may have no inventory and therefore DIO = 0. CCC simplifies to DSO − DPO, which accurately captures the gap between collecting from customers and paying suppliers.
• Cash-basis businesses. Businesses that collect payment at the point of sale (retail, restaurants, e-commerce with immediate settlement) have a DSO near zero. Their CCC is dominated by inventory efficiency and supplier terms.
• The dollar conversion uses daily revenue, not daily COGS. Multiplying CCC by daily revenue is a common approximation for working capital requirements. It slightly overstates the need because part of the cycle is funded by gross margin. For a tighter estimate, use daily COGS instead — but daily revenue is easier to obtain and gives a conservative upper bound.

Frequently asked questions

How does CCC affect my ability to get a business loan?

Lenders use CCC — often implicitly — when sizing a working capital line of credit. A high CCC means you need more cash on hand at any given moment to fund operations between spending and collecting. A revolving line of credit is typically sized at 10–20% of annual revenue, but lenders will size it higher for businesses with long cash cycles. A high CCC combined with fast growth is a strong argument for a larger line.

Is a negative CCC always good?

Generally yes — it means your suppliers are funding your operations rather than the other way around. However, a negative CCC achieved by stretching supplier payments beyond agreed terms is not sustainable and will damage supplier relationships. A genuinely negative CCC comes from collecting customer payments before paying for the inventory that generated the sale, which is a structural business model advantage rather than a liquidity trick.

How do I find my DSO, DIO, and DPO?

Use the three companion calculators: the DSO calculator for receivables, the inventory turnover calculator for DIO, and the DPO calculator for payables. Each requires a balance (AR, inventory, or AP) plus annual revenue or COGS and the number of days in the period.

What is a typical CCC for a small business?

It varies widely by industry. Restaurants and grocery stores often run negative CCCs. Retail businesses typically see 30–60 days. Contractors and B2B service businesses with slow-paying customers often run 60–90 days. Manufacturing businesses can exceed 90 days. The most actionable benchmark is your own trend over time — a rising CCC signals that receivables are aging, inventory is building, or payment terms with suppliers are tightening.