What a bill of materials is
A bill of materials, or BOM, lists everything needed to make one garment: fabric, rib, thread, labels, trims and packaging, each with the amount used. It tells the factory what to source and lets you cost the garment line by line.
How costs are calculated
Cost per garment for a line = quantity × (1 + wastage %) × unit cost
The lines are added up to give materials cost per garment, then multiplied by the order quantity. Labour is not included. Add it with the manufacturing cost calculator.
What to include
- Main and secondary fabrics with composition and weight
- Rib, lining and interlining
- Thread, zips, buttons, snaps, drawcords and eyelets
- Main, care and size labels, hang tags
- Polybags, stickers and cartons
The example rows are placeholders. Replace them with your own materials and prices.
Common questions
Is a BOM part of a tech pack?
Yes. It sits alongside the sketches, size chart and artwork so the factory knows exactly which materials to use.
Why add wastage to each line?
Fabric is lost in cutting and a few trims are lost or damaged in production. Wastage makes sure enough is ordered.