Quick Read: A garment can be beautiful, technically sound and still fail as a product if the numbers do not work. Garment costing converts material consumption, labour, trims, overhead, waste, transport and margin into a commercial structure that determines whether the design is viable.
Price begins long before the price tag
The consumer sees one number. The business sees a stack of costs.
A retail price is the visible end of an invisible cost architecture.
The CivDJ system chain
design → material consumption → labour minutes → trims → waste → overhead → factory cost → freight/duty → wholesale margin → retail margin → final price → sell-through → margin evidence → future costing
Fabric is often the largest direct cost
The cost of cloth depends not only on price per metre but how much fabric each garment consumes.
Pattern efficiency, width and size range all affect consumption.
Marker efficiency turns geometry into money
Pattern pieces must be arranged on fabric. Better utilisation reduces waste.
A tiny improvement in marker efficiency can matter greatly at high volume.
Labour cost depends on time
A garment with ten simple operations costs differently from one with fifty complex operations.
Standard minutes convert construction complexity into labour planning and cost.
Trims look small but accumulate
Zippers, buttons, labels, interlining, thread, snaps and packaging may each seem minor. Together they can materially change unit cost.
Waste is still cost
Offcuts, rejected pieces and process loss are paid for even when they never become sellable product.
Costing therefore has to account for material utilisation rather than idealised consumption.
Overhead keeps the factory functioning
Rent, supervision, utilities, maintenance, administration and depreciation are not attached neatly to one garment, but they still need to be recovered.
FOB is not retail price
The factory price is only one layer. Freight, insurance, duties, warehousing and local handling can all add cost before the product reaches the retailer.
Margins fund the rest of the business
Brands and retailers need gross margin to pay staff, stores, marketing, returns, markdowns and future development.
Margin is not pure profit.
Target costing reverses the process
Sometimes the market price is known first. The team then works backward to determine the maximum allowable product cost.
target retail price → required margin → allowable cost → design choices
Design changes when costing fails
A pocket may be simplified. A lining may change. A trim may be removed. Fabric may be substituted. Construction may be redesigned.
Costing is therefore part of design, not a separate accounting exercise.
Volume changes unit economics
Large orders can spread fixed development and setup costs across more units. Small runs preserve exclusivity but often cost more per piece.
Minimums can make cheap materials expensive
A low unit price is irrelevant if the supplier requires far more material than the brand can use.
Markdown risk belongs in the real economics
A product expected to sell at full price but later discounted has a different realised margin.
Good costing should be read alongside actual sell-through.
Returns also consume margin
Reverse logistics, inspection, repacking and lost sellable time create costs that the original product cost does not show.
Currency can move the cost after approval
Global fashion often buys in one currency and sells in another. Exchange-rate changes can alter margin without changing the garment.
Failure mode: costing from supplier quote alone
This ignores freight, duties, returns, overhead and markdown.
Failure mode: cutting quality blindly to hit price
Reducing cost in the wrong place can increase defects, returns and brand damage later.
Failure mode: ignoring size-related consumption
Larger sizes often require more material, affecting average cost across a size curve.
Primary reader: what is garment costing?
It is working out how much money is required to make and sell a garment.
Secondary reader: what makes costing difficult?
Many small costs combine, and changes in materials, volume, freight or markdown can alter the result.
Advanced reader: what system job does costing own?
Garment costing converts physical product architecture into financial constraints and viability thresholds.
Laboratory: cost a simple T-shirt
Create a fictional cost sheet for fabric, labour, label, thread, packaging, freight and margin. Change one variable at a time and observe how the final price moves.
Research corridor
Connect cost accounting, industrial engineering, marker utilisation, retail margin, logistics, currency risk and target costing.
World Return
Actual production cost, markdown, returns and sell-through reveal whether the original cost model was realistic.
estimated cost → production → realised margin → variance → revised costing
The larger idea
Fashion becomes commercial when beauty survives arithmetic.