Quality

Sock Factory Subcontracting: What Buyers Should Ask

Published: 2026-06-29By ZheSock TeamReading time: 5 min

Sock factory subcontracting can help a supplier handle peak season volume, but it also hides where the work is done. For brand owners and importers, the risk is not just late shipment. It is losing control of yarn lot, gauge, needle count, size tolerance, packing, and inspection records.

Table of Contents

1. Why do sock factories subcontract orders?
2. How can buyers confirm where socks are actually made?
3. What subcontracting questions should be in the RFQ?
4. How does subcontracting affect price, MOQ, and lead time?
5. What quality controls matter when subcontractors are used?
6. What contract terms reduce subcontracting risk?

Why do sock factories subcontract orders?

Capacity is the usual reason. A factory with 120 machines may be asked to fill 180 machine weeks of work in one month. Extra knitting then moves to a second site, often a nearby workshop with 20 to 50 machines that runs the same gauges. In Datang, Zhejiang, this is common because knitting, dyeing, boarding, linking, and packing sit close together.

That is not a problem by itself. It becomes one when the buyer is not told, or when the main factory cannot show control over the outside site. Ask which steps move out, who owns the yarn, and who signs the final inspection.

Knitting is the most common outside step.
Linking, boarding, trimming, and packing may also move out.
Dyeing should have batch cards, shade bands, and lot records.

How can buyers confirm where socks are actually made?

Start with an audit and ask for hard proof. A real sock factory should show machine lists by gauge and needle count, yarn warehouse labels, in-process check sheets, and the finished goods area. Common adult sock setups include 144N, 168N, and 200N machines. Heavy sports styles may use 84N to 120N. Kids styles often sit lower, depending on leg height and yarn weight.

Ask to see the machine running your order. Match the PO number, date, yarn lot, and machine code in one photo or video set. For orders above 10,000 pairs, ask for a live check when 20% to 40% of the order is knitted. If a supplier cannot show this, control on the floor is weak.

What subcontracting questions should be in the RFQ?

Put the question in writing before price talks go far. Ask whether any part of knitting, linking, boarding, inspection, or packing will be done outside the named factory. Ask whether the subcontractor changes by season or by order size. Ask who keeps the records and who makes the reject call.

Use numbers. For example: 5,000 pairs per color, 200N combed cotton crew sock, one size, polybag pack, carton marks supplied by buyer. Then ask for lead time in days, not months. A typical custom sock order needs 7 to 10 days for samples, 20 to 35 days for bulk, and 3 to 5 days for final packing after inspection. Simple repeat orders can move faster. Complex jacquard, wool blends, or gift box packing can take longer.

How does subcontracting affect price, MOQ, and lead time?

Subcontracting can help a factory take more orders, but it also adds handling cost and more chances for error. Small runs of 100 to 500 pairs per design are often kept in one factory because splitting the work creates waste. One workable example is a 100-pair MOQ for a simple custom sock with standard yarn and plain polybag packing. That only works when the style is basic and the factory has open machine time.

On price, a basic cotton crew sock often lands around USD 0.60 to USD 1.20 per pair in custom production, depending on yarn cost, weight, color count, and packing. Merino wool, terry cushion, grip socks, and compression styles cost more. If a quote sits 15% or more below the market and the promised lead time is short, ask how many machines are assigned and whether part of the knitting is being pushed out.

What quality controls matter when subcontractors are used?

The named supplier must own the quality system, even if another site knits part of the order. One approved sample, one yarn standard, one size chart, and one inspection method should apply to all pairs. The buyer should not have to chase two factories for one problem.

For cotton fashion socks, check fabric weight per pair, leg length, foot length, cuff width, toe seam feel, stretch recovery, and wash shrinkage. A common final inspection plan uses AQL 2.5 for major defects and AQL 4.0 for minor defects. Some buyers set AQL 1.5 for key defects such as wrong size, wrong color, broken needle lines, or logo misplacement. Ask for in-process records, carton count sheets, and defect photos tied to the PO.

In practice, a good factory will record yarn lot, machine number, operator, inspection time, and repair count. It should also keep a needle detector log and a packed case tally. If those records are missing, the control system is thin.

What contract terms reduce subcontracting risk?

Write the rule into the purchase order or supply agreement. The supplier should disclose any outside workshop before production starts, keep the same material and process standard, and allow inspection at every site used for the order. The named exporter remains responsible for quality, delivery, and documents. That point should not be vague.

Payment terms matter too. For a new supplier, 30% deposit and 70% after final inspection is common. For repeat orders, 20% deposit and balance before shipment is also used. Add a clear rework rule: wrong size, wrong color, wrong logo, or packing errors must be corrected before shipment at supplier cost. If the order uses subcontractors, add a line that the buyer can reject goods made at any undeclared site.

Frequently Asked Questions

Is sock factory subcontracting always a bad sign?

No. During peak months, or for one step like knitting, subcontracting can be normal. The issue is disclosure and control. If the main factory says where the work moves, keeps the records, and inspects the goods before packing, the risk stays manageable. Hidden subcontracting is different. That can create mixed yarn lots, size drift, and unclear blame when defects appear.

What is a reasonable MOQ if a factory does not subcontract?

For custom socks, a practical MOQ is often 100 to 1,000 pairs per design, depending on yarn, color count, and packing. Simple styles can sit near the low end. Complex jacquard, dyed yarn, woven labels, and gift boxes usually push MOQ up because setup waste and labor time rise. If the factory keeps all work in house, it can sometimes accept smaller runs.

How can I spot hidden subcontracting from samples?

Samples alone may not show it. Watch for changes between sample and bulk. Common signs are altered cuff tension, toe linking feel, yarn shade variation, uneven logo shape, and size spread outside the approved chart. Ask for bulk photos, machine needle count, yarn lot numbers, and in-process inspection records. Those details make it harder to hide a second production site.

Should I allow subcontracting in my purchase order?

Yes, but only with written approval. The PO should name which steps may be subcontracted and state that the named supplier remains responsible for quality, delivery, and compliance. It should also give you the right to inspect the actual production site. Without that, the supplier can move work without telling you.

Which certifications matter when subcontracting is involved?

Common documents in the sock trade include OEKO-TEX, BSCI, Sedex, ISO 9001, GOTS, GRS, and CE for certain product types. Check the company name, address, scope, expiry date, and product category. If subcontracting is used, ask whether the certificate covers the site doing the relevant process. A certificate for one address does not prove another workshop is covered.

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