CESTAT grants partial relief to ICF, holding excise duty refund claims not barred by unjust enrichment.

June 18, 2026 : The Customs, Excise and Service Tax Appellate Tribunal (CESTAT), Chennai, the Integral Coach Factory (ICF), Chennai has secured partial relief in a long-running dispute over refund claims arising from excess central excise duty paid on railway coaches. The Tribunal held that refund claims cannot be denied merely on the ground of unjust enrichment and directed authorities to reconsider eligible claims after verification of records, while also clarifying the applicability of limitation provisions under the Central Excise Act.

The dispute originated from refund applications filed by ICF under Section 11B of the Central Excise Act, 1944. ICF manufactures railway coaches and coach components for Indian Railways and follows a batch-costing system. Since the actual cost of manufacturing a batch of coaches becomes available only after completion of the batch, the factory initially paid excise duty on estimated production costs. Once final cost reports were prepared, ICF found that in several cases the actual cost of production was lower than the estimated value adopted for duty payment, resulting in excess excise duty payments for which refunds were sought.

The Department rejected parts of these refund claims on multiple grounds, including limitation under Section 11B, absence of provisional assessment under Rule 7 of the Central Excise Rules, 2002, lack of correlation between invoices and batch-cost records, and the doctrine of unjust enrichment. The Commissioner (Appeals) had upheld these objections, prompting ICF to approach the Tribunal.

A Division Bench comprising Judicial Member P. Dinesha and Technical Member M. Ajit Kumar examined the legal issues in detail. One of the most important questions before the Tribunal was whether the refund claims were barred by the doctrine of unjust enrichment, which prevents a claimant from obtaining a refund if the burden of tax has already been passed on to another person.

Rejecting the Department’s stand, the Tribunal observed that ICF is a production unit functioning under the Ministry of Railways and manufactures coaches for use by Indian Railways. The coaches are not sold in the open market but are deployed as rolling stock for railway operations. The Bench found no evidence showing that the burden of excess duty had been transferred to any independent buyer. The Tribunal noted that the excess duty arose solely because of downward revision of manufacturing costs after finalization of batch-cost records.

Referring to an earlier decision in ICF’s own case and relying on judicial precedents, including a Madras High Court ruling, the Tribunal held that the appellant had successfully rebutted the statutory presumption under Section 12B of the Central Excise Act. The Bench observed, “The Appellant has successfully rebutted the statutory presumption under Section 12B and established that the incidence of the excess duty has not been passed on to any other person.” Consequently, the rejection of refunds on the ground of unjust enrichment was set aside.

However, the Tribunal did not grant blanket relief on limitation. It emphasized that ICF had never sought provisional assessment under Rule 7 of the Central Excise Rules, 2002, despite the fact that actual production costs were not ascertainable at the time of clearance of coaches. According to the Bench, in the absence of provisional assessment, all assessments made at the time of removal of goods must be treated as final assessments. Therefore, refund claims remain governed by Section 11B and must satisfy the statutory limitation period of one year.

The Tribunal clarified that while the right to seek refund may exist after finalization of actual costs, the law does not permit treating the date of cost finalization as the “relevant date” for limitation purposes where provisional assessment was never adopted. As a result, refund claims filed beyond the one-year limitation period were held to be time-barred, while claims filed within the prescribed period were declared eligible, subject to verification.

The Bench also examined whether the Department could reject refund claims merely because invoices did not contain batch numbers or references to cost sheets. On this issue, the Tribunal ruled in favour of ICF. It held that the absence of batch numbers on invoices may justify detailed scrutiny but cannot by itself become a ground for rejecting refund claims. The Tribunal noted that the Department had previously accepted the same batch-costing methodology while recovering differential duty whenever actual production costs exceeded estimated costs. Therefore, authorities could not selectively reject the methodology when it resulted in a refund claim.

The Tribunal directed the adjudicating authority to verify the necessary correlation through production records, cost sheets, batch-wise statements and other contemporaneous documents. It observed that “Refund shall not be denied merely because batch numbers are not reflected on the invoices, if the requisite correlation can otherwise be established from the records produced.”

Another important aspect of the case concerned valuation methodology. ICF argued that production costs should be determined under Chapter 13 of the Indian Railway Code for the Mechanical Department. The Tribunal rejected this contention and ruled that valuation for excise purposes must be determined strictly under Rule 8 of the Central Excise Valuation Rules, 2000 using the CAS-4 cost accounting standard. The Bench held that internal railway costing procedures cannot override statutory valuation rules framed under the Central Excise Act.

The Tribunal further upheld the denial of refund relating to spare parts amounting to ₹34.44 lakh because ICF had not specifically challenged that portion of the appellate order or advanced substantive arguments against it during the proceedings.

Summarising its conclusions, CESTAT held that refund claims are not barred by unjust enrichment, claims filed within the limitation period under Section 11B are admissible subject to verification, time-barred claims cannot be entertained, assessments cannot be treated as provisional without compliance with Rule 7, valuation must be based on CAS-4 standards, and refund cannot be denied solely because invoices lack batch numbers if proper correlation is otherwise established. The matter has been remanded to the adjudicating authority for verification of quantification, limitation issues, correlation of records and determination of the admissible refund amount.

The ruling is likely to have wider implications for public sector manufacturing units and government entities that follow batch-costing systems and seek excise duty refunds after finalization of production costs. It reinforces the principle that procedural deficiencies cannot automatically defeat genuine refund claims, while simultaneously reaffirming the strict application of limitation provisions under Section 11B of the Central Excise Act.

Case Reference: Integral Coach Factory, Chennai v. Commissioner of GST & Central Excise, Chennai North Commissionerate, Excise Appeal Nos. 40732-40741 of 2017.