Amazon FBA Working Capital Calculator
Calculate how much working capital your Amazon FBA business needs based on your cash conversion cycle.
Calculate Your Working Capital
Cash Conversion Cycle Breakdown
Working Capital Needed
capital needed to fund your cash conversion cycle
What Is the Cash Conversion Cycle?
The cash conversion cycle (CCC) measures how long your cash is tied up between paying for inventory and receiving payment from sales. For Amazon FBA sellers, this is critical because you purchase inventory weeks or months before Amazon pays you.
A shorter CCC means less working capital is needed to run your business. A negative CCC means your suppliers are effectively financing your operations—you collect from Amazon before you have to pay your supplier.
How to Calculate Working Capital
The formula breaks into three components:
DIO = (Average Inventory ÷ Monthly COGS) × 30
DSO = Days to receive payment (Amazon default: 14 days)
DPO = Supplier payment terms in days
CCC = DIO + DSO − DPO
Working Capital = (CCC ÷ 30) × Monthly COGS
Example: If you hold $30,000 in inventory, your monthly COGS is $15,000, Amazon pays in 14 days, and you pay your supplier in 30 days: DIO = ($30,000 ÷ $15,000) × 30 = 60 days. CCC = 60 + 14 − 30 = 44 days. Working capital needed = (44 ÷ 30) × $15,000 = $22,000.
Understanding Your Results
| CCC Range | Assessment | What It Means |
|---|---|---|
| Negative | Excellent | Suppliers finance your business—you get paid before bills are due |
| 0–30 days | Good | Healthy cash flow with modest working capital needs |
| 30–60 days | Typical | Common for Amazon FBA sellers; plan financing accordingly |
| 60–90 days | High | Significant capital tied up; consider negotiating better supplier terms |
| 90+ days | Very High | Cash flow risk; review inventory levels and payment terms |
Frequently Asked Questions
The cash conversion cycle (CCC) measures the number of days between when you pay for inventory and when you receive cash from selling it. It combines three metrics: how long inventory sits (DIO), how long until you get paid (DSO), and how long you take to pay suppliers (DPO). A shorter CCC means your business needs less working capital.
Amazon typically pays sellers every 14 days. This 14-day delay (your DSO) is a fixed cost to your cash flow. Unlike businesses that collect payment at the point of sale, Amazon sellers always have at least two weeks of revenue tied up in transit. Some new sellers may have longer hold periods of 21-28 days.
Longer payment terms (higher DPO) reduce your working capital needs because you hold onto cash longer before paying. Net-30 terms mean you have 30 days to pay, effectively getting a free short-term loan from your supplier. Net-0 or prepayment terms significantly increase the cash you need on hand.
Most Amazon FBA sellers have a CCC between 30 and 60 days. Below 30 days is excellent. A negative CCC is ideal but rare for physical product businesses—it means you collect from customers before you need to pay suppliers. Focus on reducing DIO (sell through inventory faster) and increasing DPO (negotiate longer payment terms).
Three levers: (1) Reduce DIO by ordering smaller, more frequent shipments and clearing slow-moving stock. (2) Negotiate longer supplier payment terms (Net-30, Net-60) to increase DPO. (3) Consider Amazon Lending or a line of credit to bridge the gap during peak inventory periods.
A negative CCC is a good thing. It means you receive payment from Amazon before your supplier payment is due. This is common for sellers with generous Net-60 or Net-90 supplier terms and fast-turning inventory. Effectively, your suppliers are providing free financing for your operations.
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