Who Pays Real Property Tax When a Government Corporation Assumes a Private Firm's Tax Liability?

The case of National Power Corporation v. Province of Quezon (G.R. No. 171586, July 15, 2009) settles a recurring question in build-operate-transfer (BOT) arrangements: when a government-owned and controlled corporation (GOCC) contractually assumes the tax liabilities of a private contractor, can it also claim the GOCC's statutory tax exemptions? The Supreme Court said no, clarifying that the test for real property tax exemption is actual use, not ownership or contractual obligation.

The Facts of the Case

The National Power Corporation (NPC) entered into an Energy Conversion Agreement (ECA) with Mirant Pagbilao Corporation in 1991. Under this BOT arrangement, Mirant would build, finance, operate, and maintain a coal-fired power plant on NPC-owned land in Pagbilao, Quezon for 25 years. At the end of the term, the plant would be transferred to NPC without compensation. Under the ECA, NPC assumed responsibility for paying all real estate taxes on the plant and its machineries.

In 2000, the Municipality of Pagbilao assessed real property taxes on the power plant and its equipment totaling over P1.5 billion for 1997 to 2000. NPC protested the assessment, claiming exemption under Section 234(c) of the Local Government Code (LGC), which exempts machineries actually, directly, and exclusively used by GOCCs engaged in power generation and transmission. NPC also sought a lower assessment level and depreciation allowances.

The Issue

The central question was whether NPC, as a GOCC that contractually assumed Mirant's tax obligations, could claim the tax exemptions and privileges available to GOCCs under the LGC.

The Ruling

The Supreme Court denied NPC's petition and affirmed the Court of Tax Appeals' decision. The Court made several key rulings.

No standing to protest. Under Section 226 of the LGC, only the owner or a person with legal interest in the property may protest an assessment. The Court found that NPC had neither. Under the ECA, Mirant owned the plant and its machineries until the transfer date. NPC's future ownership after 25 years was merely contingent and expectant, not the direct and immediate interest the law requires. NPC's contractual assumption of tax liability, without ownership or possession, did not give it legal standing to challenge the assessment.

Tax liability follows ownership and use. While NPC agreed to pay Mirant's taxes, this obligation ran only between NPC and Mirant. Under the principle of relativity of contracts (Article 1311, Civil Code), the local government units (LGUs) could not enforce this contractual obligation against NPC, nor could NPC use it to claim exemptions. The tax liability imposed by law rests on the owner or the entity with actual and beneficial use of the property—here, Mirant.

Exemption depends on actual use. To claim exemption under Section 234(c) of the LGC, the GOCC must actually, directly, and exclusively use the machineries. Although the plant generated electricity for NPC's benefit, Mirant—a private corporation—operated and used the machineries. The Court rejected NPC's argument that it was the beneficial user, noting that the test is the nature of the use, not ownership or the ultimate beneficiary of the output.

No unfair windfall. The Court found it fundamentally wrong for NPC to assume Mirant's tax liability in a contract, then claim exemption from those same taxes. Allowing this would deprive the Province of Quezon and Municipality of Pagbilao of revenues they are entitled to under the LGC.

Practical Takeaways

• Tax exemptions are strictly construed. A GOCC cannot extend its statutory exemptions to a private contractor's property merely by contract. The exemption under Section 234(c) of the LGC requires the GOCC itself to actually, directly, and exclusively use the machineries.
• Contractual assumption of taxes is not enough. Assuming another party's tax liability creates an obligation between the contracting parties only. It does not give the assuming party standing to protest assessments or claim exemptions before tax authorities.
• Know who has standing to protest. Only the owner or a person with actual and material legal interest in the property may appeal an assessment under Section 226 of the LGC. A future or contingent interest will not suffice.
• Draft BOT agreements carefully. Parties should consider who will bear real property tax liabilities and how protests will be handled, since the private contractor—not the GOCC—will typically have standing to challenge assessments.
• LGUs may collect from the actual owner or user. Local governments can enforce real property tax against the entity that owns or beneficially uses the property, regardless of any private arrangement shifting the economic burden elsewhere.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.