GST on Job Work Services: Section 143 Rates & Compliance (2026)

What is GST on job work? Job work is any processing, treatment, or manufacturing carried out on goods belonging to a registered principal. The principal sends raw materials or capital goods to the job worker under a delivery challan without paying GST. The job worker performs the work and charges GST at 5%, 12%, or 18% depending on the nature of the service. The principal claims ITC on the job work charges. Inputs must return within 1 year and capital goods within 3 years; failure triggers a deemed supply with retrospective tax and interest.

If you are a manufacturer, textile processor, or engineering job shop in India, the GST treatment of job work determines how you move goods, claim credits, and file returns. The rules sit across Section 143 of the CGST Act, multiple rate notifications, and the ITC-04 reporting framework. Getting any of these wrong creates reconciliation mismatches, interest liabilities, or blocked ITC.

This guide covers the complete framework: definitions, applicable rates, the Section 143 procedure, delivery challan requirements, time limits, deemed supply consequences, ITC rules, and ITC-04 filing. It applies to all job work arrangements where the principal is a registered person under GST.

For an overview of all GST return types and their filing timelines, see our guide on types of GST returns in India 2026.

Looking for expert help with GST compliance for manufacturers? The team at Tax Garden, based in Kondapur, Hyderabad, helps Indian SMEs stay compliant end-to-end: filings, notices, and advisory, all in one place.

What Is Job Work Under GST? Definition and Scope

Section 2(68) of the CGST Act, 2017 defines job work as "any treatment or process undertaken by a person on goods belonging to another registered person." Three elements follow from this definition.

First, the goods must belong to the principal. The job worker does not purchase or own the raw materials or semi-finished goods. Ownership stays with the principal throughout the process. This is the key distinction between job work and outright manufacturing on contract.

Second, the principal must be a registered person under GST. If the person sending the goods is unregistered, the movement does not qualify for the Section 143 job work procedure, and standard supply rules apply.

Third, "treatment or process" is defined broadly. It includes manufacturing, processing, assembling, packing, labelling, testing, and any other activity that brings the goods closer to a finished state. The definition does not require the final product to be different from the input. Even quality testing or surface finishing qualifies if performed on the principal's goods.

Common job work arrangements in practice:

• Textiles: grey fabric sent to a dyer or printer for processing, then returned or shipped directly to the buyer
• Engineering and metal: castings sent for machining, heat treatment, or surface coating
• Pharmaceuticals: bulk drugs sent for formulation, blister packing, or labelling
• Jewellery: gold or diamonds sent for cutting, polishing, or setting
• Electronics: PCBs sent for assembly and soldering
• Plastics: raw granules sent for injection moulding or extrusion

GST Rates on Job Work Services

Job work services fall under SAC (Services Accounting Code) 9988: "Manufacturing services on physical inputs (goods) owned by others." The applicable rate depends on the nature of the goods being processed and the type of job work.

Two points of practical importance.

The 5% rate for textiles applies specifically to processing of goods falling under Chapters 50 to 63 of the First Schedule to the Customs Tariff Act, 1975. These chapters cover silk, wool, cotton, man-made fibres, knitted fabrics, and made-up textile articles. If your processing work falls outside these chapters (for example, leather processing under Chapter 41), the 12% general rate applies.

The 18% rate on alcoholic liquor manufacturing job work is significant because alcoholic liquor for human consumption is outside the GST levy on goods (it remains under state excise). However, the service of manufacturing it on behalf of a brand owner is taxable under GST as a job work service. This creates situations where the finished product is not subject to GST but the processing service is.

For a detailed guide on SAC and HSN code classification, see our HSN/SAC code guide.

Section 143: The Job Work Procedure

Section 143 of the CGST Act establishes the legal framework that allows a principal to send goods to a job worker without paying GST at the time of dispatch. Without this provision, every movement of goods from the principal to the job worker would be a taxable supply.

Step-by-Step Guide

Job Work Procedure Under Section 143

End-to-end workflow from sending goods to filing ITC-04

1

Principal Sends Goods on Delivery Challan

The principal dispatches inputs or capital goods to the job worker using a delivery challan (not a tax invoice). The challan includes description, quantity, HSN code, value of goods, and the principal's and job worker's GSTIN. An e-way bill is generated if the consignment value exceeds Rs 50,000.

Dispatch

2

Job Worker Processes the Goods

The job worker performs the agreed treatment or process: dyeing, machining, assembling, testing, or any other operation. The principal's goods remain under the principal's ownership throughout.

Processing

3

Job Worker Invoices for Services

The job worker issues a tax invoice to the principal for the job work charges. GST is charged at the applicable rate (5%, 12%, or 18%) on the service value. This invoice is reported in the job worker's GSTR-1 as a B2B supply.

Invoicing

4

Goods Returned or Supplied Directly

Processed goods are either returned to the principal on a delivery challan, or supplied directly from the job worker's premises to a third party (domestic or export) on the principal's tax invoice. Time limits apply: 1 year for inputs, 3 years for capital goods.

Return/Supply

5

Principal Claims ITC

The principal claims ITC on the GST charged by the job worker (on the job work service invoice). The principal also retains ITC on the inputs originally sent for job work, as long as the goods are returned within the prescribed time limits.

ITC Claim

6

File Form GST ITC-04

The principal files ITC-04 reporting all goods sent for job work, goods received back, and goods supplied directly from job worker premises. Filing frequency: half-yearly (turnover up to Rs 5 crore) or quarterly (turnover above Rs 5 crore).

Compliance

Source: Section 143, CGST Act 2017; Rule 45, CGST Rules 2017; CBIC Circular 38/12/2018-GST

The entire arrangement works because Section 143 creates a legal fiction: the movement of goods from the principal to the job worker is not treated as a supply, provided the goods return within the prescribed time limits. The moment those limits are breached, the fiction collapses, and the movement is treated as a deemed supply with retrospective tax consequences.

Delivery Challan: Rules and Format

When a principal sends goods for job work, the document that accompanies the goods is a delivery challan, not a tax invoice. Rule 55 of the CGST Rules, 2017 prescribes the contents and format.

A delivery challan must contain:

• Date and serial number (unique, consecutive, within a financial year)
• Name, address, and GSTIN of the principal (consignor)
• Name, address, and GSTIN (if registered) of the job worker (consignee)
• HSN code, description, and quantity of goods
• Taxable value of goods being sent
• Tax rate and tax amount: since no tax is payable on the movement, the challan shows "Nil" or "0" for tax
• Place of supply and signature of the consignor or authorized agent

The delivery challan must be prepared in triplicate: one copy for the principal, one for the job worker, and one to accompany the goods during transit.

E-way bill requirement: If the value of goods in a single consignment exceeds Rs 50,000, an e-way bill must be generated on the e-way bill portal before the goods are dispatched. The e-way bill references the delivery challan number (not a tax invoice number). For goods moving within the same state, state-specific e-way bill thresholds may apply. See our e-way bill guide for the full procedure.

When a tax invoice is issued instead: The delivery challan is used only for the movement of goods. The job worker issues a separate tax invoice to the principal for the job work service charges. If the principal decides to supply finished goods directly from the job worker's premises to a buyer, the principal issues a tax invoice (not the job worker) for that outward supply.

Time Limits: 1 Year for Inputs, 3 Years for Capital Goods

Section 143(1) prescribes the time limits within which goods sent for job work must be returned to the principal or otherwise dealt with.

Inputs (raw materials and semi-finished goods): Must be returned to the principal within 1 year from the date of dispatch. The 1-year period is calculated from the date on the delivery challan.

Capital goods: Must be returned to the principal within 3 years from the date of dispatch. Capital goods include plant and machinery, equipment, and tools used in manufacturing. However, there is an important exception.

Exception for moulds, dies, jigs, fixtures, and tools: These items are explicitly excluded from the 3-year time limit under the proviso to Section 143(1)(b). They can remain at the job worker's premises indefinitely. This exception recognises the practical reality that moulds and dies are often permanently installed at the job worker's location for the duration of a manufacturing programme. The principal must still report them in ITC-04 when initially sent out, but no return deadline applies.

Practical tracking: For a manufacturer with multiple job workers and hundreds of delivery challans in a year, tracking these deadlines is operationally critical. A single missed deadline on a high-value consignment can trigger a deemed supply with tax plus interest calculated retrospectively from the date of original dispatch, not from the date the deadline was missed.

Deemed Supply: What Happens If You Miss the Deadline

Section 143(3) is the enforcement provision. If the inputs are not received back within 1 year (or capital goods within 3 years), the transaction is treated as if the principal had supplied those goods to the job worker on the date they were originally sent out.

The consequences are:

1. GST becomes payable on the value of the goods at the rate applicable to those goods (not the job work service rate). For example, if steel worth Rs 10 lakh was sent for machining and not returned within 1 year, GST at the rate applicable to steel (18%) is payable on Rs 10 lakh.

2. Interest at 18% per annum is charged from the date of deemed supply (i.e., the original dispatch date) to the date of actual tax payment. On a 12-month delay, this adds roughly 18% to the tax liability.

3. ITC reversal: Any ITC claimed by the principal on the inputs sent for job work must be reversed, because the goods are now treated as supplied (i.e., they are no longer "inputs" in the principal's hands).

4. The deemed supply is reported in the principal's GSTR-1 and GSTR-3B for the tax period in which the time limit expires, but the tax and interest are calculated from the original dispatch date.

This retrospective treatment makes deadline management critical. The penalty is not just the tax; it is the interest accumulation over the entire period the goods were out for processing.

Recovery scenario: If the goods are eventually returned after the time limit has expired and the principal has already paid the deemed supply tax, the principal can treat the subsequent return as a fresh inward supply (subject to conditions under the law). However, this creates additional documentation burden and reconciliation complexity.

ITC Rules for Job Work Transactions

The ITC framework for job work has two distinct components.

ITC on inputs sent for job work: The principal claims ITC on the inputs at the time of purchase, as normal. The fact that those inputs are subsequently sent to a job worker does not affect the principal's ITC entitlement, provided the goods are returned within the prescribed time limits (1 year for inputs, 3 years for capital goods). Section 19(3) of the CGST Act (previously Section 16) explicitly permits the principal to claim ITC even if the inputs are not received at the principal's own premises but are received at the job worker's premises on behalf of the principal.

ITC on job work charges: The job worker charges GST on the service (5%, 12%, or 18% depending on the category). The principal pays the invoice and claims ITC on the GST component of the job work charges. This is a standard B2B ITC claim, matched through the job worker's GSTR-1 and the principal's GSTR-2B.

What the job worker can claim: The job worker, being a registered person providing taxable services, can claim ITC on inputs and input services used in providing job work services. This includes consumables, fuel, machine maintenance, and other costs directly attributable to the job work activity. The job worker cannot claim ITC on the principal's goods (because those goods do not belong to the job worker).

ITC reversal on deemed supply: If the 1-year or 3-year time limit is breached, the principal must reverse the ITC claimed on the inputs or capital goods that were sent for job work. This reversal is reported in Table 4(B) of GSTR-3B for the relevant tax period.

For a detailed guide on ITC eligibility across different scenarios, see our guide on GST input tax credit for startups and businesses.

Form GST ITC-04: Filing Requirements

Form GST ITC-04 is the principal's declaration of all job work transactions during a reporting period. It captures the complete lifecycle: goods sent out, goods received back, and goods supplied directly from the job worker's premises.

Who must file: Every registered principal who sends goods for job work under Section 143.

Filing frequency:

What ITC-04 captures:

• Challan-wise details of goods sent to each job worker (challan number, date, description, quantity, value)
• Details of goods received back from the job worker (challan number, date, quantity)
• Details of goods supplied directly from the job worker's premises to a third party (tax invoice details)
• Details of goods sent from one job worker to another job worker (where multi-stage processing is involved)
• GSTIN of each job worker

Multi-stage job work: In many manufacturing processes, goods move from one job worker to another (for example, casting to machining to surface treatment). Each movement must be documented with a delivery challan, and the entire chain must be reported in ITC-04. The 1-year time limit for inputs runs from the date the goods were originally dispatched from the principal's premises, not from each intermediate movement.

Late filing: There is no specific penalty prescribed for late filing of ITC-04. However, failure to file creates a compliance gap that can trigger scrutiny during audits. The department may question ITC claims on inputs sent for job work if the corresponding ITC-04 is not filed, leading to potential ITC disallowance during assessment proceedings.

Direct Supply from Job Worker's Premises

Section 143(1)(a) permits the principal to supply processed goods directly from the job worker's premises to a third-party buyer. This provision is significant for manufacturers who use the job worker as the last stage of processing before delivery to the end customer.

Domestic supply: The principal issues a tax invoice to the buyer and charges GST. The supply is treated as a supply by the principal, not by the job worker. The place of supply follows normal rules (location of the buyer for goods).

Export: The principal can export goods directly from the job worker's premises, either with payment of IGST or without payment of IGST under a Letter of Undertaking (LUT). The principal must have a valid LUT filed via Form RFD-11 on the GST portal. The shipping bill references the principal's GSTIN, not the job worker's.

Condition: For direct supply from the job worker's premises, the job worker's place of business must be declared as an additional place of business by the principal, OR the job worker must be a registered person. This condition ensures that the department has visibility into the location from which goods are being supplied.

This arrangement is common in textiles (principal supplies dyed fabric directly to garment manufacturers from the dyer's premises), engineering (machined components shipped directly to the OEM from the machining shop), and export-oriented units that process goods through multiple job workers before the final shipment leaves India.

Common Mistakes in Job Work GST Compliance

Issuing a tax invoice instead of a delivery challan when sending goods. The movement of principal's goods to a job worker is not a supply. Issuing a tax invoice creates a fictitious taxable supply that must then be reversed. Always use a delivery challan under Rule 55 for sending goods for job work.

Missing the 1-year or 3-year return deadline. This is the most expensive mistake. The deemed supply provision under Section 143(3) applies retrospectively, which means interest accumulates from the original dispatch date. For a large consignment sitting at a job worker for 14 months, the interest liability alone (18% for 14 months) can be substantial.

Not filing ITC-04. Many principals, especially smaller manufacturers, are unaware that ITC-04 is a separate filing obligation. The GST portal does not automatically populate ITC-04 from delivery challans; it must be filed manually with challan-wise details. Missing ITC-04 filings can lead to ITC being questioned during audits.

Job worker not charging GST on job work services. An unregistered job worker cannot issue a tax invoice. If the principal pays job work charges without GST, the principal loses ITC on those charges. Worse, the transaction may be treated as an unregistered supply, triggering reverse charge obligations on the principal under Section 9(4) in specific notified categories.

Treating moulds and dies under the 3-year time limit. Moulds, dies, jigs, fixtures, and tools are exempt from the return time limit. Principals sometimes panic and recall moulds from job workers as the 3-year mark approaches, disrupting production unnecessarily. The exemption is clear in the proviso to Section 143(1)(b).

Not generating e-way bills for consignments above Rs 50,000. Even though goods are moving on a delivery challan (not a supply transaction), the e-way bill requirement applies to the movement of goods. Goods intercepted without a valid e-way bill during transit attract a penalty equal to the tax that would have been applicable on the goods, plus the goods may be detained.

Frequently Asked Questions

Does a job worker need separate GST registration?

Not mandatory if the job worker works exclusively for registered principals sending goods under delivery challans. However, registration is recommended because: (1) an unregistered job worker cannot issue tax invoices for job work charges, (2) the principal cannot claim ITC on charges paid to an unregistered job worker without reverse charge complications, and (3) if the job worker's aggregate turnover exceeds Rs 20 lakh (Rs 10 lakh in special category states), registration is mandatory regardless.

What happens if inputs sent for job work are not returned within 1 year?

Under Section 143(3), the inputs are deemed to have been supplied by the principal to the job worker on the date they were originally sent out. The principal must pay GST on the value of those inputs plus 18% interest from the date of deemed supply. Any ITC claimed on those inputs must also be reversed. The 1-year clock starts from the date of the delivery challan.

Can the principal supply finished goods directly from the job worker's premises?

Yes. Section 143(1)(a) permits the principal to supply processed goods directly from the job worker's premises. For domestic supplies, the principal issues a tax invoice and pays GST. For exports, the principal can supply with or without payment of tax (under LUT/bond). This avoids double transportation costs.

Is ITC-04 filing mandatory for every principal?

Yes. Every registered principal who sends goods for job work must file Form GST ITC-04 on the GST portal. Filing frequency: half-yearly for taxpayers with aggregate turnover up to Rs 5 crore (January and July); quarterly for taxpayers with turnover above Rs 5 crore. ITC-04 captures challan-wise details of goods sent, received back, and supplied from job worker premises.

Who pays GST on job work charges: the principal or the job worker?

The job worker charges GST on job work services and issues a tax invoice to the principal. The principal pays the invoice amount (including GST) and claims ITC on the GST component. This is a forward charge mechanism. The job worker files the supply in their GSTR-1 as B2B services.

Are moulds and dies sent to job workers covered by the 3-year time limit?

No. Moulds, dies, jigs, fixtures, and tools are explicitly excluded from the 3-year return requirement for capital goods under Section 143(1)(b). They can remain with the job worker indefinitely. However, the principal must report them in ITC-04 when initially sent out.

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Tax Garden's GST compliance service covers the entire job work cycle for manufacturers and principals: delivery challan tracking with automated deadline alerts for the 1-year and 3-year time limits, ITC-04 preparation and filing (half-yearly or quarterly), reconciliation of job work ITC against GSTR-2B, and e-way bill generation for job work consignments. Fixed monthly plans with no per-challan charges.

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Sources used in this article: CGST Act, 2017, Section 2(68) (definition of job work), Section 143 (job work procedure, time limits, deemed supply provisions), Section 19(3) (ITC on goods at job worker premises); CGST Rules, 2017, Rule 45 (conditions and procedures for job work), Rule 55 (delivery challan format and contents); Notification 11/2017-Central Tax (Rate) as amended (GST rates on job work services under SAC 9988); CBIC Circular 38/12/2018-GST (clarifications on job work procedure); Form GST ITC-04 filing requirements per CBIC notification dated 10.11.2020 (half-yearly filing for turnover up to Rs 5 crore). Rate classifications verified against cbic-gst.gov.in rate schedules and the First Schedule to the Customs Tariff Act, 1975 (Chapters 50-63 for textiles).