G.R. No. 179259 ; September 25, 2013
COMMISSIONER OF INTERNAL REVENUE, Petitioner, vs. PHILIPPINE AIRLINES, INC. (PAL), Respondent.

FACTS

For its fiscal year ending March 31, 2000, Philippine Airlines, Inc. (PAL) filed a Tentative Corporate Income Tax Return reflecting zero taxable income and a claim for refund of creditable withholding tax. The Bureau of Internal Revenue (BIR) subsequently issued a Letter of Authority to examine PAL’s books concerning this refund claim. Following an audit, the BIR instead issued a Formal Letter of Demand dated December 1, 2003, assessing PAL for deficiency Minimum Corporate Income Tax (MCIT) in the amount of ₱326,778,723.35 for the same fiscal year.
PAL filed a formal protest, arguing it was exempt from the MCIT under its legislative franchise, Presidential Decree No. 1590, and that the assessment was issued beyond the three-year prescriptive period. As the Commissioner of Internal Revenue took no final action, PAL filed a Petition for Review with the Court of Tax Appeals (CTA). The CTA Second Division granted PAL’s petition, canceling the assessment. The CTA En Banc affirmed this decision, prompting the Commissioner to elevate the case to the Supreme Court.

ISSUE

Whether PAL is liable for the deficiency Minimum Corporate Income Tax (MCIT) assessment for its fiscal year ending March 31, 2000.

RULING

The Supreme Court DENIED the petition and AFFIRMED the CTA En Banc decision, holding PAL not liable for the MCIT. The Court’s ruling hinged on the interpretation of PAL’s franchise under P.D. No. 1590. Section 13 of the franchise provides that PAL shall pay either a basic corporate income tax based on its annual net taxable income or a two percent (2%) franchise tax on its gross revenues, whichever is lower, “in lieu of all other taxes.”
The Court clarified that the “basic corporate income tax” referenced in the franchise specifically pertains to the ordinary income tax under Section 27(A) of the 1997 National Internal Revenue Code (NIRC), not the MCIT under Section 27(E). The MCIT is a distinct tax mechanism imposed on a corporation’s gross income when it exceeds the ordinary income tax due, designed to ensure minimum tax payment. Since PAL’s franchise only offers a choice between two specific tax bases, the MCIT—being a separate tax not included in the franchise’s enumerated options—falls under the “all other taxes” from which PAL is expressly exempted. Therefore, having reported zero taxable income for the relevant period, PAL correctly availed itself of the basic corporate income tax option under its franchise, rendering it exempt from the MCIT assessment. The Court found no need to rule on the issue of prescription.