Complete Guide to Garment Costing (2025): CMT, FOB & Everything In Between

1. What is Garment Costing and Why It Matters

Garment costing is the process of estimating the total cost incurred to manufacture a piece of clothing. It is the foundation of profitability in the fashion supply chain. Accurate costing ensures competitive pricing while protecting manufacturer margins; inaccurate costing leads to hidden losses and unsustainable operations.

2. The 6 Cost Components Every Manufacturer Must Know

1. Direct Material Cost: The cost of fabric, trims, labels, hangtags, and packaging. Fabric typically accounts for 60-70% of the total garment cost.
2. Direct Labour Cost: Calculated using the formula: (SMV × SAM rate) / Efficiency percentage.
3. Manufacturing Overhead: Factory burden including utilities, rent, machine depreciation, and indirect labour.
4. Quality & Testing Costs: Expenses related to third-party testing, AQL inspections, and compliance audits.
5. Selling & Administration Cost: Marketing, merchandising overhead, and administrative expenses.
6. Profit Margin: The markup applied to the total cost to ensure business viability.

3. CMT vs FOB vs DDP — Which Costing Model Are You On?

CMT (Cut, Make, Trim): The buyer provides the fabric; the manufacturer charges only for cutting, sewing, and trims.
FOB (Free On Board): The manufacturer sources everything and covers costs up to loading the goods onto the shipping vessel.
DDP (Delivered Duty Paid): The manufacturer covers all costs, including shipping and import duties, delivering the goods directly to the buyer's warehouse.

4. How to Calculate Fabric Consumption for Accurate Costing

Fabric consumption calculation requires precise marker planning. It considers the garment dimensions, fabric width, shrinkage, and pattern repeat. Even a 2% error in consumption estimation can wipe out the profit margin on a high-volume order.

5. Fabric Wastage Factors and How to Account for Them

Wastage occurs during cutting (end bits, edge allowances), sewing, and quality rejections. Standard practice adds a 3-5% wastage allowance for basic solids, and up to 10% for complex prints or checks. This must be factored into the initial material cost.

6. Currency Risk: How Exchange Rates Kill Export Margins

For exporters, quoting in USD or EUR while incurring costs in INR introduces currency risk. A 5% currency fluctuation between quotation and payment can erase profits. Exporters must employ forward contracts or build currency buffers into their FOB quotes.

7. The Most Common Garment Costing Errors (and how to fix them)

Common errors include omitting hidden trims (e.g., fusing, thread), underestimating fabric shrinkage, ignoring testing costs, and using outdated labour rates. Fixing these requires moving away from manual Excel sheets to centralized costing databases.

8. Seasonal Costing vs. Running Product Costing

Seasonal costing involves high initial development costs and smaller runs, requiring higher margins. Running (core) products benefit from economies of scale, learning curve efficiencies, and long-term material contracts, allowing for tighter costing.

9. Downloadable Garment Costing Sheet Template

A standardized costing sheet ensures no component is missed. It should clearly separate material, labour, overhead, and logistics costs.

10. How AI Improves Garment Costing Accuracy

AI models analyze historical production data to predict true SMV, identify hidden wastage patterns, and flag anomalies in trim costs. They ensure that quoted costs closely match actual realized costs.

11. Try TRAZE AI Free Garment Costing Calculator

Stop guessing your margins. Use the TRAZE AI Free Garment Costing Calculator to build accurate CMT and FOB costs instantly.