Accounting Working Capital (Per-Unit) Calculator FAQ
Answers to common questions about working capital per unit, operating cycle days, inventory values, receivables, and supplier credit.
This FAQ explains the inputs, results, and assumptions used by the Accounting Working Capital (Per-Unit) Calculator. Results are educational estimates rather than accounting or financial advice.
General working capital questions
Core concepts behind the estimate.
What does this calculator estimate?
It estimates average operating working capital tied up in raw materials, WIP, finished goods, and customer receivables, less supplier credit.
What is working capital per unit?
It is estimated total operating working capital divided by planned annual units sold or produced.
Is working capital per unit the same as unit cost?
No. Unit cost is the cost to make a unit. Working capital per unit is an estimate of operating funds tied up while units move through the cash cycle.
Inputs and valuation
How the calculator treats costs, prices, and days.
Why are receivables based on selling price?
Receivables represent the amount customers owe from credit sales, which is generally the invoiced sales value before sales taxes where possible.
Why are finished goods based on production cost?
Finished goods are inventory, so this calculator values them using material, labour, and production overhead rather than expected sales revenue.
What should be included in labour and overhead per unit?
Use direct labour and production overhead associated with making a completed unit. Keep the treatment consistent with the production cost used for inventory.
How do I choose WIP completion percentage?
Use the average proportion of total production cost incurred by units still in production. It is an estimate, not the completion of one specific unit.
Timing and results
How operating days affect the estimated funding requirement.
What is the net operating cycle?
It is raw material days plus WIP days plus finished goods days plus customer payment days, less supplier credit days.
Why do longer receivable days increase working capital?
More days to collect payment means more sales value remains unpaid on average, increasing funds tied up in customer balances.
Why do longer payable days reduce working capital?
Longer supplier credit delays payment for materials, offsetting part of the cash tied up in operating assets.
Can total working capital be negative?
Yes. The estimate can be negative if supplier credit exceeds inventory and receivables. Review whether payment and stock assumptions reflect actual operations.
Accuracy and use
Important boundaries of the calculation.
Does the calculator include tax, loans, and cash in the bank?
No. It focuses on selected operating current assets and supplier payables, excluding cash, taxes, borrowing, interest, and many other balances.
Will the estimate match the balance sheet exactly?
Not necessarily. A balance sheet reflects actual balances on a date, while this is a day-based average estimate using entered assumptions.
Can I use this for seasonal businesses?
It can provide a baseline, but seasonal businesses may need separate high-season and low-season scenarios because average annual days can hide peak funding needs.
What is working capital per unit?
It is the estimated net operating cash tied up for each planned annual unit after inventory, receivables, and supplier credit are considered.
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