Sourcing Guide

What's Actually in a Bag Quote: A Cost Breakdown for Brands

Updated 20269 min read

You send the same drawing to three factories and get back $4.20, $5.60, and $7.80. The instinct is to assume the first one is efficient and the last one is greedy. Almost always, something else is going on: the three factories quoted three different bags, because your spec left them room to choose. Here is what sits underneath a unit price, why the same bag can legitimately cost nearly twice as much at one supplier, and how to ask for a breakdown in a way that actually gets you one.


1. The Seven Lines Behind a Unit Price

Whatever the final number, a factory built it from roughly the same seven components. Knowing which is which tells you where a price difference is coming from — and where a design change would actually save you money.

Main fabric.Usually the single largest line. Cost scales with weight, coating, and whether the color is a stock shade or a custom dye. Two quotes that both say "polyester" can be a dollar apart on this line alone, because 600D and 1680D are both polyester.

Lining and interlining. Invisible from the outside and easy to downgrade quietly. Foam, board inserts, and stiffeners that hold a bag's shape live here too, and they are a common reason a cheap sample arrives looking limp.

Hardware and trims. Zippers, buckles, sliders, rivets, D-rings, webbing, and any branded metal parts. This line has the widest quality range of anything on the bag — see our hardware guide for what separates the grades.

Labor. Priced from the number of sewing operations, not from the size of the bag. A small crossbody with eight pockets, a zip lining, and length-adjustable strap hardware takes more minutes than a large plain tote, and will cost more to sew.

Branding operations. Embroidery, printing, woven labels, heat-pressed logos, embossed plates. Each is a separate operation with its own setup cost — and a logo that appears in three places on the bag is three operations, not one.

Packaging. Polybag, hangtag, tissue, dust bag, gift box, barcode labels, carton and carton marks. On a low-priced bag with retail packaging, this line can quietly reach ten percent of the unit cost.

Waste, overhead, and margin. Fabric cutting always produces offcuts, and the yield loss is real cost. On top of that sits factory overhead and the supplier's margin — which, on straightforward OEM work at volume, is usually a thinner slice than buyers assume.

2. What Sits Outside the Unit Price

Three more costs exist but are quoted separately, and forgetting them is how a landed cost calculation goes wrong.

Sampling. Development and sample fees are charged per round, before bulk. We covered how these are calculated, and when they get credited back, in the sample development guide.

Tooling and setup. A mould for a custom hardware piece, a die for a cut shape, an embossing plate, or an embroidery digitizing charge. One-time, paid up front, and independent of quantity — which is exactly why it hurts most on a small first order and disappears on reorders. Ask who owns the tool afterwards and whether it stays on file for you.

Freight, duty, and testing. Whatever your trade term doesn't cover. If your market requires product testing or specific compliance documentation, that is a real cost too, and it belongs in your budget before you compare quotes rather than after.

3. Where a $4.20 and a $7.80 Quote Actually Diverge

When we look at two quotes on the same drawing that are far apart, the gap almost always sits in a small number of places:

LineWhat the cheap quote assumedWhat you probably meant
FabricLightest weight that meets the description, stock color, uncoatedA specific denier and coating, dyed to your Pantone
ZipperGeneric nylon coilBranded zipper, specific size and slider finish
StructureNo foam or board — a soft, collapsible bagPadded panels and a bottom board that holds shape
BrandingOne printed labelWoven main label, embroidered front logo, branded puller
PackagingBulk polybagIndividual polybag, hangtag, barcode, retail-ready
Trade termEXWFOB or DDP

Not one of those is a lie. Each is a factory filling a gap in the spec with the cheapest defensible assumption, because the quote that comes back lowest is the one that gets a reply. The fix is not to distrust cheap quotes — it is to close the gaps, which is what a tech pack is for.

4. How Quantity Actually Moves the Price

Unit price doesn't slide down as volume rises; it steps down at break points. Three thresholds do most of the work:

The fabric roll minimum. Mills sell in roll quantities and dye in lot minimums. Below that threshold, you are either paying for fabric you won't use or paying a surcharge for a short run. Cross it and the fabric line drops sharply.

The hardware carton. Buying 200 sliders is disproportionately expensive compared to buying a full carton. This is the main reason hardware-heavy styles carry higher minimums than simple ones.

Setup amortization. A tooling or digitizing charge divided by 200 units is visible in the unit price; divided by 3,000 it disappears.

The practical consequence: going from 200 to 400 pieces often moves the price much more than going from 2,000 to 4,000, because the first jump crosses thresholds and the second only buys marginal sewing efficiency. Rather than asking "what's your price at 5,000?", ask where the break points are — the answer sometimes means a modest quantity increase pays for itself. The same logic drives the minimums themselves, which we unpacked in our MOQ guide.

5. Asking for a Breakdown Without Getting a Fake One

Most factories will not open their full margin structure, and a buyer who demands it usually receives a plausible-looking set of numbers invented backwards from the quoted price. That is worse than no breakdown at all.

What is reasonable to ask, and what a serious supplier will give you, is a split across materials, hardware, labor, packaging, and one-time charges. Two questions get you further than demanding a spreadsheet:

"Which line is the biggest, and what would change it most?"— this points straight at the lever. Sometimes it's a fabric one grade down that no customer would notice; sometimes it's deleting a pocket that costs three sewing operations.

"What did you assume where my spec was silent?" — this surfaces the gaps in the table above before they become a production dispute. A supplier who answers this one specifically is telling you something useful about how they will behave later.

6. Reading a Quote Before You Sign

Five things worth confirming in writing, every time:

  • The trade term — EXW, FOB, or DDP. Comparing two quotes on different terms is not comparing anything.
  • How long the price holds — material prices and exchange rates move, and a quote without a validity date is not really a commitment.
  • Whether the price is per colorway — one color at 1,000 pieces and ten colors at 100 each are different orders, and the second one is more expensive.
  • What packaging is included — down to whether there is a hangtag and who prints the barcode.
  • The overage or shortage tolerance — how many pieces over or under the ordered quantity is considered acceptable delivery, and how that is billed.

Frequently Asked Questions

Why do two factories quote such different prices for the same bag?

Usually because they are not quoting the same bag. The two most common causes are material grade (a 600D polyester and a 1680D ballistic polyester are both 'polyester', and coated versus uncoated versions of the same fabric differ again) and hardware grade (a nylon-coil zipper versus a branded metal zipper can move a unit price by more than a dollar on its own). The third cause is the trade term: an EXW price and a DDP price for the identical bag are not comparable numbers. Ask both factories to quote against the same written spec and the same Incoterm before concluding one is expensive.

Should I ask a factory for a full cost breakdown?

Ask for a partial one. Most factories will not open their full margin structure, and pushing for it tends to produce a fabricated breakdown rather than a real one. What is reasonable, and what a serious supplier will provide, is a split between materials, hardware, labor, packaging, and any amortized tooling or setup charges. That is enough to see which line is driving the difference between two quotes and where a design change would actually save money.

How much does unit price drop as quantity goes up?

Less than most buyers expect, and not smoothly. Price steps down at break points rather than sliding — the points where a fabric roll minimum is met, where hardware can be bought in a full carton rather than a partial one, and where a setup or tooling charge spreads across enough units to stop mattering. Doubling from 200 to 400 pieces often moves the price meaningfully because it crosses those thresholds; doubling from 2,000 to 4,000 usually moves it much less, since only labor efficiency is left to gain.

What is a mould or tooling charge and when do I have to pay it?

A tooling charge covers a physical tool made specifically for your product — a mould for a custom-shaped hardware piece or a moulded shell, a die for a cut shape, or a plate for an embossed logo. It is a one-time cost, paid before production, and it is separate from the unit price. You only pay it when your design needs a custom component; a bag built entirely from stock hardware and standard patterns carries no tooling charge. Always ask who owns the tool afterwards and whether it stays available for your reorders.

Is the cheapest quote ever the right one?

Sometimes, but check what was left out before deciding. The recurring pattern with an unusually low quote is not dishonesty so much as a different set of assumptions: a lighter fabric weight, generic hardware instead of the branded item you specified, a simpler lining, a polybag instead of the retail packaging you described, or an EXW price where the others quoted FOB. Re-quote the lowest bidder against the exact written spec and the same trade term; if the price holds, it is real.


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Sanjin Bag has manufactured bags since 2006 from a 48,000㎡ facility in Gaoqing, Shandong, with 200+ skilled workers and 20+ production lines. Send us a drawing or a reference bag and we'll quote it with the material, hardware, labor, and packaging assumptions written out — so you can see what you are comparing. Samples from 1 piece, bulk orders from 200 pieces. BSCI, ISO 9001, and GRS certified.

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