Accounting Working Capital (Per-Unit) Calculator Examples
Explore worked examples showing how inventory, production costs, customer credit, and supplier terms affect working capital per unit.
These examples use a 365-day year and steady activity to illustrate the calculator's operating working capital estimates. Currency symbols are illustrative; use the same currency consistently for all monetary inputs.
Example 1: Small batch manufacturer with balanced supplier terms
Low-volume manufacturer with supplier credit matching material holding days.
Input Summary
Annual units
3,000
Material cost per unit
$20.00
Labour and overhead per unit
$10.00
Selling price per unit
$45.00
Raw material, WIP, finished goods days
20, 5, 15 days
WIP completion, receivable, payable days
50%, 30, 20 days
Calculation Breakdown
- 1Production cost$20.00 + $10.00$30.00 per unit
- 2WIP investment3,000 × $30.00 × 5 / 365 × 50%$616.44
- 3Finished goods investment3,000 × $30.00 × 15 / 365$3,698.63
- 4Receivables investment3,000 × $45.00 × 30 / 365$11,095.89
- 5Net result($616.44 + $3,698.63 + $11,095.89) / 3,000$5.14 per unit
Result Summary
Net result
$5.14 per unit
Accounting Working Capital (Per-Unit) Calculator
Estimated total working capital is $15,410.96, or $5.14 per unit. The net operating cycle is 50 days.
Example 2: Growing producer with longer customer collection
Growth planning case with a longer cash collection period.
Input Summary
Annual units
20,000
Material cost per unit
$18.00
Labour and overhead per unit
$12.00
Selling price per unit
$50.00
Raw material, WIP, finished goods days
25, 12, 30 days
WIP completion, receivable, payable days
60%, 60, 35 days
Calculation Breakdown
- 1Production cost$18.00 + $12.00$30.00 per unit
- 2Raw materials less supplier credit20,000 × $18.00 × (25 − 35) / 365−$9,863.01
- 3WIP and finished goods20,000 × $30.00 × 12 / 365 × 60% + 20,000 × $30.00 × 30 / 365$66,739.73
- 4Receivables20,000 × $50.00 × 60 / 365$164,383.56
- 5Net result($66,739.73 + $164,383.56 − $9,863.01) / 20,000$11.06 per unit
Result Summary
Net result
$11.06 per unit
Accounting Working Capital (Per-Unit) Calculator
Estimated working capital is $221,260.27, or $11.06 per unit. The net operating cycle is 92 days.
Example 3: Faster-turning business with short customer terms
Operationally faster cycle with limited stock holding.
Input Summary
Annual units
50,000
Material cost per unit
$8.00
Labour and overhead per unit
$7.00
Selling price per unit
$28.00
Raw material, WIP, finished goods days
10, 4, 8 days
WIP completion, receivable, payable days
40%, 14, 25 days
Calculation Breakdown
- 1Production cost$8.00 + $7.00$15.00 per unit
- 2Net material and supplier position50,000 × $8.00 × (10 − 25) / 365−$16,438.36
- 3WIP and finished goods50,000 × $15.00 × 4 / 365 × 40% + 50,000 × $15.00 × 8 / 365$19,726.03
- 4Receivables50,000 × $28.00 × 14 / 365$53,698.63
- 5Net result($19,726.03 + $53,698.63 − $16,438.36) / 50,000$1.14 per unit
Result Summary
Net result
$1.14 per unit
Accounting Working Capital (Per-Unit) Calculator
Estimated working capital is $56,986.30, or $1.14 per unit. The net operating cycle is 11 days.
How to Read Your Results
Working capital per unit expresses estimated average operating funding against each unit in the annual plan.
Total working capital is the estimated average balance tied up across the full annual volume, not a one-time purchase cost.
A longer net operating cycle generally means cash is tied up for more days.
Receivables are valued at selling price, whereas inventory is valued at cost.
A negative total can occur if estimated supplier credit exceeds inventory and receivables; check whether the timing assumptions are realistic.
Assumptions & Important Notes
- Production and sales are spread evenly through a 365-day year.
- All examples assume credit sales and use average days rather than individual invoices or deliveries.
- Material costs are used for raw materials and supplier payables.
- The examples exclude taxes, cash reserves, financing, selling costs, and other balance-sheet items.
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Frequently Asked Questions
Can I use these examples for a retail business?
They can be a starting point if the business holds stock and sells on credit, but WIP may be zero or not relevant for a pure retailer.
Why is the per-unit result lower in the fast-turning example?
It has shorter inventory and customer payment periods, while supplier credit exceeds raw material holding days.
Should I use forecast or historical days?
Either can be used for an estimate. Historical averages can describe current operations, while forecast days can model a planned change.
Do I need to convert monthly volume to annual units?
Yes. The calculator uses annual values and divides relevant balances by 365, so use expected units for the full year.
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