FOB Price Calculation Basics for Garment Merchandisers

What FOB Price Actually Covers

FOB (Free on Board) price is the price a buyer pays that covers the cost of producing the garment and delivering it loaded onto the shipping vessel at the port of origin — it does not include the buyer's onward freight, insurance, or import duties, which are the buyer's responsibility from that point forward. Understanding exactly where FOB responsibility ends is essential, since confusing it with other commercial terms (like CIF) leads to real costing disputes. For broader trade compliance, merchandisers also align quotes with tariff schedules under Knitted Apparel (Chapter 61) and Woven Apparel (Chapter 62).

The boundary is the point of loading at the origin port. Everything up to that point — production, local transport to the port, export handling, and loading on board — sits inside the FOB price. Everything after it — the ocean freight, marine insurance, and any import duty at destination — sits outside it and belongs to the buyer. That is why a quote must always name the port of origin: "FOB" without a port leaves the boundary undefined, and an undefined boundary is where disputes start.

Main Cost Components That Build Up an FOB Price

An FOB price is typically built from: fabric cost (often the largest single component), trims and accessories cost, cut-make-trim (CMT) cost covering labor and factory overhead, and the factory's profit margin. Each of these components depends on other planning numbers already discussed elsewhere — fabric cost depends on accurate fabric consumption planning, and CMT cost depends heavily on accurate SMV time study and line efficiency assumptions. You can follow our complete garment costing step-by-step guide to see how these cost centers aggregate.

Inside those components, trims and accessories cover everything that is not fabric: buttons, zippers, labels, thread, poly bags, and cartons. CMT itself is not a single rate — it comes from the garment's SMV multiplied by the factory's labour-plus-overhead rate per minute, so a style with a higher SMV or a factory with a higher overhead rate carries a higher CMT. Getting CMT right therefore depends on the same SMV and efficiency discipline as the production guides in this series.

Why FOB Costing Errors Compound

Because FOB price is built from several dependent numbers, an error upstream (say, an underestimated fabric consumption or an overly optimistic efficiency assumption) flows directly into an inaccurate FOB quote — sometimes only becoming visible once the order is already in production and real costs diverge from the original quote. Merchandisers can verify their formulas using our interactive FOB Price Calculator or build a full multi-item cost sheet with the Garment Costing Sheet Calculator.

A sensitivity check makes the compounding concrete. In the worked example below, each garment carries 0.45 kilograms of fabric at 6.50 dollars per kilogram. If the fabric price rises by 0.50 dollars per kilogram, the fabric cost per piece rises by 0.45 multiplied by 0.50, which is 0.225 dollars — about 0.23 dollars per piece, or 2,250 dollars across a 10,000-piece order. A quote that never tested that sensitivity would absorb the whole increase as lost margin.

A Practical Costing Habit

Experienced merchandisers typically re-verify each major input — fabric consumption, trims cost, and CMT assumptions — against the most current actual production and sourcing data before finalizing a quote, rather than relying solely on an earlier planning-stage estimate. To master international trade terms, payment risks, and pricing strategy, explore our structured Commercial Management A–Z Course and Garment Merchandising Masterclass.

Part of that habit is stating the quote's validity: fabric prices and currency move, so a quote should say how long its inputs hold and what triggers a re-quote. A quote built on last season's fabric price, an assumed efficiency, or an unconfirmed trim price is not a quote — it is a guess with a number attached. Re-verify, record the inputs on the cost sheet, and only then send the price.

Worked Example: Building an FOB Quote

Take the same 10,000-piece cotton T-shirt order from the fabric consumption guide: 160 GSM jersey, 0.45 kilograms of fabric per piece. At an illustrative fabric price of 6.50 dollars per kilogram, the fabric cost per piece is 0.45 multiplied by 6.50, which is 2.925 dollars, rounded to 2.93 dollars. Add trims and accessories at an illustrative 0.80 dollars per piece. For CMT, use the garment SMV of 12.0 minutes from the production guides and an illustrative labour-plus-overhead rate of 0.05 dollars per minute — the same illustrative rate used in the SMV guide, and every factory must use its own — giving 12.0 multiplied by 0.05, which is 0.60 dollars per piece.

The subtotal is 2.93 plus 0.80 plus 0.60, which is 4.33 dollars per piece. Add a factory margin of 10 percent — 0.43 dollars — and the FOB price is 4.76 dollars per piece, or 47,600 dollars for the 10,000-piece order. That FOB figure covers production and delivery loaded on board at the origin port, and nothing beyond it: the buyer's onward freight, insurance, and import duties are excluded, exactly as the first section states.

The ex-factory comparison shows why the boundary matters. If local transport and port handling to load on board cost an illustrative 0.15 dollars per piece, then the ex-factory price for the same garment is 4.76 minus 0.15, which is 4.61 dollars per piece. Ex-factory and FOB describe the same garment at two different handover points — quoting one while the buyer expects the other is a 0.15-dollar-per-piece misunderstanding, or 1,500 dollars on this order. You can verify the whole build-up with the FOB Price Calculator.

Quote Checklist Before You Send

Before sending any FOB quote, check five things. One: is the fabric consumption figure from the actual marker for this style and size ratio, at the finished-fabric GSM? Two: are trims priced from current supplier quotes, not a previous order? Three: is CMT built on a realistic planned efficiency — not 100 percent — and the factory's own per-minute rate? Four: does the margin leave room for the risks the factory actually carries, such as fabric price movement and rework? Five: does the quote name the port of origin and state that onward freight, insurance, and duties are excluded?

If any answer is no, the quote is not ready. A quote sent on stale inputs will either lose the order on price or win it at a loss — and the loss usually surfaces mid-production, when renegotiation is hardest. Keep the cost sheet with the quote so every component can be re-verified when the buyer counters, rather than rebuilt from memory.