Many manufacturers dispatch materials or machinery to third-party vendors for processing under a delivery challan without paying tax. Under Section 19 of the CGST Act, you are entitled to take full input tax credit on those inputs and capital goods even when they are delivered directly to a job worker. The law grants this credit on one strict condition: the goods must come back to your factory or be sold directly from the job worker's premises within statutory timelines.
When the job worker fails to return the material before the deadline, the statutory fiction of Section 143 comes into play. The transaction ceases to be a non-taxable job work transfer and becomes a deemed taxable outward supply with retrospective tax and interest consequences.
Statutory timelines under Section 143 of the CGST Act
Section 143(1) of the Central Goods and Services Tax Act allows a registered principal to send inputs or capital goods to a job worker without payment of tax under the cover of a delivery challan. You can review the official text directly in Section 143 of the CGST Act on the CBIC portal.
The statute sets two distinct return clocks based on the nature of the goods:
- Inputs must return to any factory or warehouse of the principal within 1 year, or be supplied directly from the processor site.
- Capital goods must return within 3 years, or be supplied directly from the external facility.
- Moulds, dies, jigs, fixtures, and tools: Section 143(5) specifically excludes production tools from the return timeline. No return deadline applies.
If you need more time due to genuine operational reasons, the proviso to Section 143(1) allows the Commissioner to extend the return period upon sufficient cause shown. The Commissioner may grant an extension of up to 1 additional year for inputs and up to 2 additional years for capital goods.
Deemed supply mechanism: Section 143(3) and Section 143(4)
When goods are not returned within the prescribed period, the law does not ask you to simply write off the material. Instead, Section 143(3) for inputs and Section 143(4) for capital goods create a mandatory deemed supply:
“where the inputs sent for job work are not received back by the principal after completion of job work or otherwise... or are not supplied from the place of business of the job worker... within a period of one year of their being sent out, it shall be deemed that such inputs had been supplied by the principal to the job worker on the day when the said inputs were sent out” Section 143(3), CGST Act, 2017
This wording has serious practical consequences for your accounts team:
- The date of supply is not the expiry date of the 1 year or 3 years. The date of supply is deemed to be the date on which you originally dispatched the goods under the delivery challan.
- Because the date of supply relates back to the original dispatch date, the tax liability also belongs to that original month.
- You must issue a tax invoice for the deemed supply, report the taxable value and output tax in Form GSTR-1, and discharge the tax liability through Form GSTR-3B.
- You must pay interest under Section 50 at 18% per annum. Interest runs continuously from the date the tax was originally due for the dispatch month until the actual date of tax payment.
Costly misconception: Do not treat unreturned goods merely as an ITC reversal in Table 4B(2) of GSTR-3B without paying interest. Because Section 143 classifies unreturned items as an outward deemed supply, you must pay output tax in Table 3.1(a) and calculate interest under Section 50 from the original delivery challan date.
Reporting requirements in Form GST ITC-04 and Rule 45
Rule 45 of the CGST Rules governs the documentation and reporting mechanism for goods sent out for job work. You can check the complete rules in Rule 45 of the CGST Rules on the CBIC portal.
Every principal sending goods on job work must track the delivery challans and report them periodically in Form GST ITC-04 on the GST common portal. You can find official filing instructions on the GST Portal Returns Guidelines. The filing periodicity of Form GST ITC-04 depends on your aggregate annual turnover:
- Turnover exceeding ₹5 crore: Form GST ITC-04 must be filed half-yearly, covering April to September (due by 25 October) and October to March (due by 25 April).
- Turnover up to ₹5 crore: Form GST ITC-04 is filed annually for the financial year (due by 25 April following the end of the financial year).
Form GST ITC-04 contains specific tables to record every stage of movement. Table 4 records goods dispatched to job workers. Table 5A records goods received back from job workers. When goods exceed the statutory time limits without returning, they are accounted for as deemed supplies, reconciling the open balances reported in your ITC-04 filings.
Worked example: tax and interest calculation on unreturned inputs
For example, consider a registered manufacturing firm, Apex Engineering Works, located in Pune, Maharashtra. On 10 July 2025, Apex sent 5,000 kg of copper rods valued at ₹15,00,000 (applicable GST 18%, being CGST ₹1,35,000 and SGST ₹1,35,000, total tax ₹2,70,000) to an auxiliary unit in Nashik for specialized heat treatment under Delivery Challan DC-104.
Apex availed input tax credit on the raw material purchase. By 10 July 2026, the 1-year timeline expired. The job worker could not return 2,000 kg of copper rods due to an unresolved plant breakdown, nor was any extension sought from the Commissioner. The remaining 3,000 kg had returned safely within 6 months.
| Particulars | Quantity | Taxable Value | CGST (9%) | SGST (9%) | Total Tax |
|---|---|---|---|---|---|
| Total sent on 10 July 2025 | 5,000 kg | ₹15,00,000 | ₹1,35,000 | ₹1,35,000 | ₹2,70,000 |
| Returned within 1 year | 3,000 kg | ₹9,00,000 | ₹81,000 | ₹81,000 | ₹1,62,000 |
| Unreturned on 10 July 2026 | 2,000 kg | ₹6,00,000 | ₹54,000 | ₹54,000 | ₹1,08,000 |
Apex accounts for the deemed supply in the return for July 2026, filed on 20 August 2026. The financial liability is determined as follows:
- Taxable value of deemed supply: ₹6,00,000 for the unreturned 2,000 kg.
- Output tax payable: CGST of ₹54,000 and SGST of ₹54,000, making a total tax of ₹1,08,000.
- Deemed supply date: 10 July 2025 (the original challan dispatch date).
- Original due date of tax payment: 20 August 2025 (the due date for the July 2025 return).
- Actual payment date: 20 August 2026.
- Period of delay for interest: From 21 August 2025 to 20 August 2026, which is exactly 365 days.
- Interest calculation under Section 50: ₹1,08,000 multiplied by 18% per annum for 365 days equals ₹19,440 (comprising CGST interest ₹9,720 and SGST interest ₹9,720).
- Total cash outflow: ₹1,08,000 tax plus ₹19,440 interest, giving ₹1,27,440.
If the job worker later returns these goods after 10 July 2026, the job worker must treat that return as an independent outward supply by issuing a fresh tax invoice, enabling Apex to claim fresh ITC subject to Section 16 conditions.
Common compliance mistakes to avoid
Tax authorities routinely scrutinize job work transactions by comparing delivery challans with e-way bills and annual returns. In our review of audit findings, businesses repeatedly trigger demand notices through three recurring errors:
Mistake 1: Omitting Delivery Challan details from Form GST ITC-04. Many businesses issue physical delivery challans under Rule 55 but fail to file Form GST ITC-04. When audit teams examine e-way bills generated with sub-type 'Job Work', missing ITC-04 records lead to automatic notices treating the movement as an unaccounted outward supply.
Mistake 2: Failing to track the 1-year and 3-year aging schedule. Without an active delivery challan register, accounts teams lose visibility over materials sent across multiple job workers. By the time an annual audit occurs, unreturned materials have accumulated substantial interest liabilities under Section 50.
Mistake 3: Misapplying time limits to moulds and dies. Section 143(5) exempts moulds, dies, jigs, fixtures, and tools from the 3-year return requirement. Forcing an unnecessary deemed supply or reversing credit on active tooling parked at vendor facilities disrupts cash flow without statutory justification.
For related insights on managing credit documentation, see our guide on ITC forms under GST and our detailed walkthrough of statutory conditions in ITC claim rules under GST.
Related guides
- ITC reversal on goods sent for exhibition abroad not sold: GST rules and Circular 108
- ITC reversal on sale of capital goods: Section 18(6) and Rule 44 calculation formula
- E-way bill for goods sent for job work and Form GST ITC-04 reconciliation
- ITC reversal on sale of used business vehicle: margin scheme versus Section 18(6)
Frequently asked questions
What happens if inputs sent for job work are not received back within one year?
Under Section 143(3) of the CGST Act, if inputs are not received back within one year or an approved extended period, they are treated as a deemed supply by the principal on the original challan date. The principal must pay outward tax along with interest under Section 50.
Can the one-year or three-year period for job work goods be extended?
Yes, under the proviso to Section 143(1), the Commissioner may extend the period on sufficient cause being shown: up to one additional year for inputs, and up to two additional years for capital goods.
Do moulds, dies, jigs, and fixtures need to be returned within three years?
No, Section 143(5) specifically excludes moulds and dies, jigs and fixtures, or tools sent out for job work from the three-year return condition. No deemed supply or reversal arises on them.
How is interest calculated on deemed supply of unreturned job work goods?
Interest runs at 18% per annum under Section 50. Because the supply is deemed to have taken place on the original dispatch date, interest is calculated from the day following the original challan date until the tax is paid.
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Last checked: 15 October 2026. Official sources: Section 143 CGST Act (CBIC), Rule 45 CGST Rules (CBIC), and GSTN Returns User Guide.