Most cost sheets treat waste as a small line near the bottom: the scrap sold, or the cost of carting it away. (MFCA) asks a different question. What did it cost to buy, heat, move and work on the material that never became product?
The answer is usually several times larger than the waste line suggests, and it is money already spent.
The idea in one paragraph
Every kilogram that enters a process leaves it either as product or as a loss: offcuts, rejects, evaporation, sludge, dust. MFCA follows the material by weight through each step and gives the loss its full share of cost. That share is the material itself, the energy used on it, the labour and machine time spent on it, and the cost of handling and disposing of it. Product and loss are costed in the same way, so the loss shows up as a figure management can act on.
A worked example
A unit processes 1,000 kg of material in a batch. 800 kg leaves as good product and 200 kg is lost. The figures are illustrative.
| Cost | Amount |
|---|---|
| Material: 1,000 kg at ₹200 | ₹2,00,000 |
| Energy | ₹30,000 |
| Labour, depreciation and other processing costs | ₹70,000 |
| Waste handling and disposal | ₹5,000 |
| Total | ₹3,05,000 |
The usual cost sheet
All ₹3,05,000 is charged to the 800 kg of product, which gives ₹381.25 a kg. Waste appears only as the ₹5,000 disposal cost.
The same batch under MFCA
Material, energy and processing costs are shared by weight: 80% to product, 20% to the loss. Waste handling belongs entirely to the loss.
| Cost | Product (800 kg) | Material loss (200 kg) |
|---|---|---|
| Material | ₹1,60,000 | ₹40,000 |
| Energy | ₹24,000 | ₹6,000 |
| Processing costs | ₹56,000 | ₹14,000 |
| Waste handling | Nil | ₹5,000 |
| Total | ₹2,40,000 | ₹65,000 |
The product has cost ₹300 a kg. The loss has cost ₹65,000, which is 21% of everything spent on the batch, and 13 times the disposal cost that the usual cost sheet shows.
What the figure is for
The product did not become cheaper; the same ₹3,05,000 was spent. What changes is what management can see. A ₹5,000 waste line does not justify a project. A ₹65,000 loss in every batch does.
It also prices improvement. If the loss falls from 200 kg to 150 kg for the same 800 kg of output, the unit buys 50 kg less material: ₹10,000 a batch, before any saving in energy, processing and disposal.
Where it tends to matter most
- Processes with cutting or trimming losses: leather, garments, sheet metal, timber
- Processes with yield losses: chemicals, food, foundries, dyeing
- Any process where the material is expensive and the loss is treated as normal
How to start
- Pick one process and one month. Weigh what goes in and what comes out, product and loss separately.
- Reconcile the weights. What cannot be accounted for is itself a finding.
- Cost the loss with its share of material, energy and processing, and all of the disposal cost.
- Rank the losses by rupees, not by kilograms, and look at the largest first.
MFCA does not replace the cost records a business keeps. It reads the same data a different way.
About ISO 14051
ISO 14051 is the international standard that sets out a general framework for MFCA. It is a method a business can follow. It is not a certificate that a business or a firm can hold.
This article is a plain-language companion to a paper by the author on material flow cost accounting in The Management Accountant, the journal of the Institute of Cost Accountants of India (September 2026). The paper is the author's own work, and its publication is not an endorsement of the firm by the Institute.
Before relying on this article: the figures are an illustration. How energy and processing costs are shared between product and loss depends on the process, so work the shares out from your own records.
