Subcontracting in Manufacturing

Indian factory storekeeper sorting spare parts by priority, representing VED inventory classification

TL;DR: Subcontracting means sending a processing step, plating, heat treatment, specialized machining, to an outside vendor while you still own the material. It works fine until nobody can say exactly how much of your material is sitting at a vendor’s shop floor right now.

Every growing factory subcontracts something eventually, a process step it doesn’t have equipment for, or overflow capacity during a busy month. The real risk isn’t the decision to subcontract, it’s losing track of material the moment it leaves the gate.

What Is Subcontracting in Manufacturing?

Subcontracting is sending raw material or a semi-finished component to an outside vendor to perform a specific processing step, plating, heat treatment, powder coating, or specialized machining, that the factory can’t do in-house or doesn’t have spare capacity for.

It is different from buying a finished part outright. In subcontracting the manufacturer usually keeps ownership of the material the whole time, the vendor is paid only for processing labor, which is exactly why the material needs to be tracked out and back like any other stock movement.

The most common subcontracted processes in Indian manufacturing are electroplating, powder coating, heat treatment, CNC overflow work, and specialized welding that needs equipment a smaller factory doesn’t own.

Where Subcontracting Fits in the Purchase and Production Cycle

The Subcontracting Process, Step by Step

A subcontracted job usually runs through four stages, whether or not a factory tracks them formally:

Material issue. Raw material or WIP is issued out against a subcontract PO or challan, the quantity sent needs to match what actually leaves the gate.
Job work at the vendor. The vendor performs the agreed process, plating, machining, heat treatment, on the material, usually against an agreed turnaround time.
Return and inward QC. Processed material comes back and gets checked against what was sent out, both quantity and quality, before it’s accepted back into stock.
Vendor billing. The vendor invoices for the processing labor, not the material, and that invoice gets matched against the subcontract job before payment.

Indian factory worker operating a digital touchscreen control panel on a machine

Where Subcontracting Breaks Down

The same failure patterns show up regardless of factory size:

No record of what’s out. Material sent to a vendor isn’t tracked as a distinct stock state, so nobody can say how much inventory is sitting outside the factory at any moment.
Quantity mismatches at return. What comes back doesn’t get checked against what was sent, so process loss or a short return goes unnoticed until it affects a delivery.
No visibility into vendor turnaround. Without a tracked due date, a subcontracted job can sit at a vendor for weeks longer than planned before anyone follows up.
Subcontract billing not tied to the actual job. Vendor invoices get paid against a rough estimate instead of the specific batch and quantity that was actually processed.
Material treated as consumed the moment it’s issued. Some systems record subcontracted material as used up on issue, which overstates consumption and understates what’s actually recoverable if a job gets cancelled.

Do you know exactly how much material is sitting at a subcontractor’s shop floor right now, or does that need a phone call?

TranZact’s warehouse-wise real-time tracking treats material sent for subcontracting as its own trackable stock state, so you always know what is out, at which vendor, and what is still owed back.

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In-House Processing vs Subcontracting

Capital: in-house processing needs equipment investment; subcontracting shifts that cost to a per-job vendor rate.
Control: in-house processing gives full control over turnaround and quality; subcontracting depends on the vendor’s own schedule and standards.
Flexibility: subcontracting absorbs demand spikes without adding permanent capacity; in-house capacity is fixed regardless of order volume.
Visibility: in-house material never leaves the factory; subcontracted material needs deliberate tracking the moment it exits the gate.
Manufacturer relevance: most Indian SMEs run a mix, core processes in-house and specialized or overflow work subcontracted, rather than choosing one model exclusively.

How TranZact Supports Subcontracting

TranZact’s Sub Contracting module tracks material issued to a vendor as its own stage in the production flow, so a subcontracted batch shows up in stock reports as material out for processing, not as consumed or missing.

It does not manage the vendor relationship or negotiate turnaround times. What it fixes is knowing exactly what is out, where, and when it is due back, instead of tracking subcontracted material in a separate register nobody updates.

FAQs

What is subcontracting in manufacturing?

Subcontracting is sending raw material or a semi-finished component to an outside vendor to perform a specific process, plating, heat treatment, or machining, that a factory can’t do in-house or doesn’t have capacity for, while the manufacturer usually retains ownership of the material.

What is the difference between subcontracting and outsourcing?

Subcontracting typically means sending your own material out for one process step and getting it back. Outsourcing is broader, it can mean buying a finished component or an entire product from a vendor without ever owning the input material.

How do you track material sent for subcontracting?

By treating it as its own inventory state, issued to a vendor, distinct from both in-stock and consumed, with quantity checked on return against what was originally sent.

What processes are commonly subcontracted in Indian manufacturing?

Electroplating, powder coating, heat treatment, specialized CNC machining, and welding or fabrication work that needs equipment a smaller factory doesn’t own.

Does subcontracted material count as inventory?

Yes. It is still owned by the manufacturer and should appear in stock reports as material out for processing, not as consumed, since it comes back and re-enters usable stock once the job work is done.