Petron v. CIR: A Freeport Buyer's 30% Sales Cap Doesn't Touch the Seller's Excise Tax Exemption

In Petron Corporation v. Commissioner of Internal Revenue, the Court of Tax Appeals (CTA) En Banc upheld a ₱727.33 million refund of excise taxes Petron paid on gasoline and diesel fuel it sold to a Subic Bay Freeport enterprise, rejecting the BIR’s argument that the buyer’s alleged failure to meet a 30% domestic-sales cap in its own registration stripped away the seller’s exemption. The same July 2, 2026 ruling still disallowed ₱46.57 million of Petron’s claim because portions of the fuel removals it cited could not be reconciled against its own supporting records. This post is part of the Day in Court series.

Case details #

What happened #

Petron Corporation, as manufacturer of petroleum products, pays excise tax on the unleaded gasoline and diesel fuel oil it produces before those products leave its refinery, under the “pay-as-you-remove” scheme in Section 130 of the National Internal Revenue Code (NIRC). Some of that fuel was later sold and delivered to Micro Dragon Petroleum, Inc. (MDPI), an enterprise registered with the Subic Bay Metropolitan Authority (SBMA) and located within the Subic Bay Freeport Zone.

Petron treated those sales as exempt from excise tax under Section 135(c) of the NIRC, which exempts petroleum products sold to entities that are, by law, exempt from both direct and indirect taxes — a status Freeport locators generally hold under Republic Act No. 7227 (the Bases Conversion and Development Act). Having already paid the excise tax as the statutory taxpayer, Petron filed administrative and then judicial claims for a refund or tax credit certificate covering the first, second, and third quarters of calendar year 2018, docketed as CTA Case Nos. 10232, 10267, and 10266.

The CTA First Division ruled on the consolidated cases in a Decision dated August 15, 2024, later modified by a Resolution dated March 11, 2025, granting Petron a partial refund. Both the Commissioner of Internal Revenue (CIR) and Petron appealed portions of that ruling to the CTA En Banc — the CIR seeking to overturn the refund entirely, Petron seeking to recover the part that had been disallowed.

The issue before the court #

Two distinct questions were before the CTA En Banc. First, whether MDPI’s alleged failure to keep its Philippine customs-territory sales within a 30% cap — a condition the CIR said was attached to MDPI’s SBMA registration — disqualified Petron’s fuel sales to MDPI from the Section 135 excise tax exemption. Second, whether Petron had adequately proven, through its own records, that the full volume of fuel it claimed a refund on was actually removed and sold to MDPI as an exempt transaction.

The ruling #

The CTA En Banc denied both parties’ petitions for review, affirming the First Division’s partial refund essentially as modified.

The 30% threshold governs a different incentive #

The CIR argued that MDPI’s registration with the SBMA conditioned its incentives on limiting sales within the Philippine customs territory to no more than 30% of its total income, and that MDPI’s failure to meet that cap should disqualify Petron’s sales to it from the excise tax exemption. The Court rejected this, holding that the 30% domestic-sales threshold is a condition of MDPI’s income tax incentive — not a condition of the excise tax exemption Petron invoked under Section 135(c) of the NIRC. The two exemptions rest on separate legal bases and separate conditions; a shortfall in one does not automatically defeat the other.

In doing so, the Court reiterated the Supreme Court’s earlier reasoning in Commissioner of Internal Revenue v. Pilipinas Shell Petroleum Corporation on how the excise tax exemption for petroleum sold to a tax-exempt buyer is meant to operate. As BusinessWorld’s report on the ruling quoted the Court’s reasoning:

“[The exemption] must correspondingly benefit the one who actually bears the liability to pay the [excise tax], such as the importers or manufacturers of petroleum products sold to international carriers.”

Applying that logic, because Petron was the party that actually bore the excise tax cost on fuel ultimately sold to a tax-exempt buyer, the exemption’s benefit was meant to flow back to Petron through a refund — regardless of a registration condition attached to a different tax incentive of its buyer.

Petron’s own documentation still had to hold up #

Winning the legal argument on the exemption did not resolve the case in Petron’s favor entirely. The Court affirmed the First Division’s disallowance of ₱46.57 million of the claim after finding that portions of the diesel fuel removals Petron cited could not be reconciled against its own supporting documents — its SAP-generated Official Registry Books (ORBs) and its excise tax returns. Tax refund claims, the Court noted, are strictly construed against the claimant and must rest on evidence that actually supports the specific amount claimed, not merely on the underlying legal entitlement.

A companion ruling on the same day #

The CTA En Banc issued a second, related decision the same day covering a separate Petron claim for ₱9.55 million in excise tax on imported lubricating oils and additives that became part of finished products later sold to tax-exempt entities, covering the period August 1 to December 31, 2019. The Court upheld a refund of ₱2.77 million but denied Petron’s attempt to recover an additional ₱3.73 million, holding that the company could not expand its refund claim to cover periods or amounts beyond what its original petition had pleaded.

Our insights #

Two incentives, two sets of conditions #

The most transferable lesson from this ruling isn’t really about petroleum — it’s about how Philippine tax law tends to bundle multiple, legally distinct incentives into a single registration certificate. A Freeport or ecozone enterprise’s registration can carry an income tax incentive (such as a preferential gross income tax rate) alongside VAT and excise tax treatment on its purchases, each governed by its own provision of the NIRC or its own special law. The CTA’s holding here — that a condition attached to one incentive doesn’t automatically import itself into another — is a recurring theme across Philippine tax jurisprudence on multi-incentive registrations, and it cuts against a common BIR audit shortcut of treating a single registration lapse as fatal to every tax benefit an entity enjoys.

A refund claim still lives or dies on paper #

Even where a taxpayer is legally entitled to an exemption in principle, this decision is a reminder that a refund claim is ultimately a documentation exercise. Petron won the legal argument decisively but still lost ₱46.57 million because specific removals could not be traced back to specific supporting records. For any taxpayer pursuing a refund of an indirect tax like excise tax or VAT, this reinforces the practical need to keep source documents — removal permits, delivery records, and the returns filed at the time — organized well enough to survive a line-by-line reconciliation years later, when the case is finally decided.

What this means for taxpayers #

If your business sells goods or services to a Freeport, ecozone, or otherwise tax-exempt buyer and later seeks a refund of the indirect tax you paid upstream:

• Identify which specific exemption or incentive applies to the transaction, and don’t assume a condition attached to your buyer’s other tax privileges (like an income tax incentive) automatically limits an unrelated exemption, such as one for excise tax or VAT.
• Keep transaction-level records that tie each removal or sale to its supporting documentation — registry books, permits, and returns — because a refund claim can be reduced or denied item by item even after the underlying legal theory is accepted.
• Expect strict construction. Philippine courts consistently treat tax refund and exemption claims as matters to be proven affirmatively and narrowly, not inferred from general eligibility.

This case sits alongside other Day in Court posts on Freeport and export-oriented VAT zero-rating, including Coral Bay Nickel v. CIR on PEZA VAT zero-rating documentation, and connects to this site’s guides on BIR Form 2200-P for excise tax on petroleum products and what excise tax covers in the Philippines.

Frequently asked questions #

Why was Petron entitled to a refund of excise tax it already paid? #

Petron, as manufacturer, is the statutory taxpayer who pays excise tax on petroleum products before they leave the refinery. When those products are later sold to a buyer that Section 135 of the NIRC exempts from excise tax — such as a Subic Bay Freeport locator — the tax paid on that portion becomes erroneous or illegally collected, and Section 135 read with Section 204 lets the seller who bore the cost claim it back.

Does a Freeport enterprise’s 30% domestic-sales limit affect its fuel purchases? #

According to the CTA En Banc’s ruling in Petron v. CIR, no. The 30% cap on how much of a Subic Bay Freeport enterprise’s total income can come from sales within the Philippine customs territory is a condition tied to the enterprise’s income tax incentive under its SBMA registration. The Court held it has no bearing on whether petroleum products sold to that enterprise qualify for the separate excise tax exemption under Section 135 of the NIRC.

Why did Petron still lose part of its refund claim? #

The CTA En Banc affirmed the CTA First Division’s disallowance of ₱46.57 million of Petron’s claim because certain diesel fuel removals could not be reconciled against Petron’s own supporting records — its SAP-generated Official Registry Books and excise tax returns. The ruling on the legal exemption question did not excuse Petron from proving, removal by removal, that the fuel it claimed a refund on was actually the fuel it sold to the exempt buyer.

What is the difference between the excise tax exemption and an income tax incentive for Freeport enterprises? #

They rest on different legal bases and serve different purposes. A Freeport or economic zone enterprise’s income tax incentive (such as the 5% gross income tax in lieu of national and local taxes) is conditioned on registration requirements like the 30% domestic-sales cap. The excise tax exemption on petroleum products sold to such an entity flows instead from Section 135 of the NIRC, which asks only whether the buyer is, by law, exempt from direct and indirect taxes — a separate question the Court held the 30% cap does not answer.

Sources #

Primary sources

• Court of Tax Appeals — official case decisions and resolutions portal (citation of record for the CTA En Banc Decision promulgated July 2, 2026, and the CTA First Division Decision of August 15, 2024 and Resolution of March 11, 2025 in CTA Case Nos. 10232, 10266 & 10267; the specific decision documents could not be independently fetched in this research session due to a network restriction on direct access to court document downloads — the facts and figures above are corroborated across the secondary sources below)

Secondary sources

• BusinessWorld Online — CTA upholds partial Petron excise tax refunds in twin rulings
• BusinessMirror — CTA rules for Petron in ₱727-M case
• Du-Baladad and Associates (BDB Law) — INSIGHTS, September 2024 Issue (corroborating the CTA First Division’s August 15, 2024 decision in CTA Case Nos. 10232, 10266 & 10267 and its holding that the 30% sales threshold applies to the income tax incentive, not the excise tax exemption)