The Customs, Excise and Service Tax Appellate Tribunal (CESTAT) Chennai has clarified that a refund of excess Oil Industry Development Cess (OID Cess) cannot be denied on grounds of unjust enrichment when the contractual framework and documentary evidence conclusively establish that the burden of the cess was borne solely by the seller and never passed on to the buyer. This ruling reinforces the primacy of contractual terms and independent evidence over statutory presumptions in refund adjudication under the Central Excise Act.
Background & Facts
The Dispute
The dispute concerns the refund of excess Oil Industry Development Cess (OID Cess) paid by M/s. Oil and Natural Gas Corporation Ltd. (ONGC), the appellant, during the period March 2016 to May 2016. ONGC, engaged in crude oil exploration and production, sold crude oil to Chennai Petroleum Corporation Limited (CPC L) under a Crude Oil Sale Agreement (COSA). OID Cess was levied at an ad valorem rate of 20% under Notification dated 28.03.2016 issued under Section 15 of the Oil Industry (Development) Act, 1974. ONGC claimed a refund of Rs. 4,42,08,044/-, asserting that the cess was erroneously computed on the ex-duty value of crude oil instead of the correct cum-duty value, resulting in overpayment.
Key Facts
- OID Cess was levied at 20% ad valorem from 28.03.2016 under Notification dated 28.03.2016
- The Appellant paid cess on the sale price excluding VAT, treating it as ex-duty value
- The correct valuation under Section 4 of the Central Excise Act, 1944 requires treating the sale price as cum-duty value
- For a sale price of ₹100, correct assessable value should be ₹83.33 (₹100 ÷ 1.20), with cess of ₹16.67
- Instead, ONGC paid ₹20 as cess on ₹100, resulting in excess payment of ₹3.33 per ₹100 of sale value
- The excess payment for March - May 2016 totaled Rs. 4,42,08,044/-
- The COSA explicitly excluded OID Cess from Schedule B, which governs pricing
- Schedule B lists recoverable components as base price, VAT, and certain duties; OID Cess is absent
- Invoices issued to CPC L showed only base price and VAT, with no OID Cess component
- ONGC corrected its valuation methodology from June 2016 onwards
- A Chartered Accountant certificate dated 14.03.2017 certified that OID Cess was borne by ONGC and not passed on
- CPC L issued a confirmation dated 08.03.2017 stating it had paid no amount towards OID Cess
Procedural History
- March 2016 to May 2016: Period of excess OID Cess payment
- 2016 - 2017: ONGC filed refund claim under Section 11B of the Central Excise Act, 1944
- 30.01.2018: Commissioner of GST and Central Excise (Appeals-I) issued Order-in-Appeal No. 45/2018 rejecting refund on grounds of unjust enrichment
- 12.06.2018: Appeal filed before CESTAT Chennai (Excise Appeal No. 41097 of 2018)
- 26.03.2026: Hearing conducted before CESTAT Chennai Regional Bench
- 12.06.2026: Final Order No. 40721/2026 issued
The Parties' Positions
For the Appellant
- Argued that OID Cess was not recoverable from CPC L under COSA
- Contended that valuation error was purely technical, arising from misapplication of Section 4
- Relied on invoices, CA certificate, and buyer confirmation to prove non-passing of incidence
- Cited precedents including Indian Oil Corporation Ltd. v. CCE and Amadalasa Cooperative Sugars Ltd.
- Emphasized that cum-duty valuation is a method of computation, not evidence of burden shifting
For the Respondent
- Relied on Section 12B of the Central Excise Act, which creates a statutory presumption of unjust enrichment
- Argued that mere certificates are insufficient to rebut the presumption
- Contended that the transaction value inherently includes all levies unless expressly excluded
- Maintained that the absence of OID Cess in invoices does not prove non-recovery
Relief Sought
The Appellant sought:
- Refund of Rs. 4,42,08,044/- paid as excess OID Cess
- Interest on the refund amount as per law
- Setting aside of the Impugned Order dated 30.01.2018
The Legal Issue
The central question was whether the doctrine of unjust enrichment under Section 11B read with Section 12B of the Central Excise Act, 1944 applies when the incidence of OID Cess is contractually borne by the seller, the buyer confirms non-payment of the cess, and independent documentary evidence establishes that the duty was never passed on.
Arguments Presented
For the Appellant
The Appellant relied on the Crude Oil Sale Agreement (COSA), particularly Schedule B, which explicitly lists only VAT and certain other duties as recoverable from the buyer. OID Cess is conspicuously absent. The invoices issued to CPC L did not include any OID Cess component. The Chartered Accountant’s certificate dated 14.03.2017, based on examination of accounting records and contractual terms, certified that the burden of OID Cess was borne by ONGC. The buyer, CPC L, independently confirmed in writing that it had paid no amount towards OID Cess. The Appellant cited Indian Oil Corporation Ltd. v. CCE, Amadalasa Cooperative Sugars Ltd., and Dharival Industries Ltd. to establish that where the contract price is inclusive of duty and no separate recovery is made, unjust enrichment does not arise. The Appellant emphasized that the cum-duty valuation principle is a statutory mechanism for determining assessable value and cannot be conflated with actual burden shifting.
For the Respondent
The Respondent contended that Section 12B raises a statutory presumption that the incidence of duty has been passed on, and the burden to rebut it lies squarely on the appellant. It argued that the mere production of certificates and invoices is insufficient without corroborative proof of financial impact on the buyer. The Department maintained that the transaction value under COSA, being a commercial price, inherently absorbs all levies unless explicitly excluded, and that the absence of OID Cess in invoices could be a matter of accounting convenience rather than non-recovery. It relied on the verification report to argue that the Appellant’s own methodology indicated an intent to recover the cess.
The Court's Analysis
The Tribunal undertook a meticulous analysis of the statutory framework, contractual terms, and evidentiary record. It began by affirming that Section 4 of the Central Excise Act, 1944 requires the assessable value to be derived by backing out the duty component from a cum-duty price. The Appellant’s error - paying 20% cess on a price already inclusive of cess - was mathematically established as an overpayment of ₹3.33 per ₹100 of sale value, totaling Rs. 4,42,08,044/-. The Tribunal held that such excess payment, arising from a mistake in valuation methodology, is refundable under Article 265 of the Constitution, which prohibits taxation without legal authority.
"The absence of OID Cess in Schedule B is not accidental but deliberate, particularly when the agreement expressly identifies and allocates tax components such as VAT."
The Tribunal emphasized that the COSA operates as a complete code for pricing. Schedule B explicitly includes VAT and excludes OID Cess. The inclusion of other levies like Customs Duty and NCCD for certain crude types, while omitting OID Cess for Cauvery crude, demonstrated a deliberate allocation of burden. The invoices, which showed only base price and VAT, further corroborated this.
"The Chartered Accountant's certificate... certifies that the refund amount... has been borne by the Appellant itself and has not been passed on to CPC L or any other person."
The Tribunal found the CA certificate and the buyer’s confirmation to be independent, credible, and mutually reinforcing. The buyer, as the ultimate recipient, had no incentive to falsely confirm non-payment. The Department failed to produce any evidence to rebut these documents. The Tribunal distinguished Allied Photographics, holding that the doctrine of unjust enrichment must be applied pragmatically, not mechanically. It held that the presumption under Section 12B is rebuttable and stands overcome by documentary proof of contractual exclusion and buyer attestation. The Tribunal rejected the Department’s argument that cum-duty valuation implies burden shifting, stating that valuation is a legal fiction for computation, not proof of economic incidence.
The Verdict
The Appellant succeeded. The Tribunal set aside the Impugned Order dated 30.01.2018 and allowed the refund of Rs. 4,42,08,044/- paid as excess OID Cess for the period March 2016 to May 2016. The Tribunal directed the Respondent to process the refund within 8 weeks from the date of the order, with interest at the rate of 6% per annum from the date of payment until actual refund. Costs of Rs. 50,000/- were awarded to the Appellant.
What This Means For Similar Cases
Contractual Clarity Overrides Presumptions
- Practitioners must meticulously document contractual terms governing tax allocation
- Absence of a tax in a pricing schedule is strong evidence of non-recovery
- Invoices must reflect actual transaction value without hidden duty components
Documentary Evidence Is Decisive
- Chartered Accountant certificates and buyer confirmations are admissible and powerful rebuttals to Section 12B presumption
- Independent third-party attestations carry greater weight than internal assertions
- A chain of documentary evidence (contract + invoice + certificate) is more persuasive than any single document
Valuation Errors Are Refundable
- Excess duty paid due to misapplication of Section 4 valuation principles is refundable
- The doctrine of unjust enrichment does not apply where the burden is contractually borne by the seller
- Tax authorities cannot retain amounts collected without legal authority under Article 265
