Tax Assumption vs. Tax Exemption: Who Pays When International Agreements Are Involved

The Supreme Court's 2017 decision in Mitsubishi Corporation-Manila Branch v. Commissioner of Internal Revenue (G.R. No. 175772) settles an important question in Philippine tax law: what happens when the government promises to "assume" the taxes of a foreign contractor under an international agreement? The answer hinges on a critical distinction between a tax assumption and a tax exemption—two concepts that carry very different legal consequences.

The Facts of the Case

In 1987, Japan and the Philippines entered into an Exchange of Notes whereby Japan extended a loan of ¥40.4 billion to the Philippines through the Overseas Economic Cooperation Fund (OECF) for the Calaca II Coal-Fired Thermal Power Plant Project. Under Paragraph 5(2) of the Exchange of Notes, the Philippine Government undertook to assume all fiscal levies or taxes imposed in the Philippines on Japanese firms and nationals operating as suppliers, contractors, or consultants in connection with the project. The exact text of this provision is not reproduced in the library materials, but the Supreme Court decision confirms its substance.

The National Power Corporation (NPC), as the executing agency, later contracted Mitsubishi Corporation for the project's engineering and construction. The contract contained a provision mirroring the tax assumption commitment, stating that NPC shall pay any and all forms of taxes directly imposable under the contract. Again, the precise wording is not in the library, but the decision confirms this arrangement.

Despite these provisions, Mitsubishi paid ₱44,288,712.00 in income tax and ₱8,324,100.00 in branch profit remittance tax (BPRT) for fiscal year ending March 31, 1998. It then filed a claim for refund with the Commissioner of Internal Revenue (CIR), arguing the taxes were erroneously collected since the Philippine Government had assumed them.

The Core Issue

The case presented two questions: (1) Was Mitsubishi entitled to a refund of the taxes it paid? (2) If so, from which government entity should the refund be claimed?

The Court's Ruling

The Supreme Court ruled in favor of Mitsubishi, reversing the Court of Tax Appeals En Banc. The Court held that the taxes were indeed erroneously collected and that Mitsubishi was entitled to a refund from the BIR.

Tax Assumption vs. Tax Exemption

The Court drew a clear line between the two concepts. Tax exemption means freedom from a duty or liability—the taxpayer simply does not owe the tax. Tax assumption, on the other hand, means the obligation remains but is passed on to another person who becomes bound to pay it.

Here, the Exchange of Notes did not exempt Mitsubishi from tax liability. Instead, the Philippine Government, through NPC, assumed that liability. The obligation to pay still existed—it was just shifted to the government.

Executive Agreements and Senate Concurrence

The CTA En Banc had argued that the Exchange of Notes could not grant tax exemption without Senate concurrence as required by the Constitution. The Supreme Court disagreed, citing Abaya v. Ebdane: an exchange of notes is a form of executive agreement, which becomes binding through executive action alone, without needing Senate approval.

Because the provision was a tax assumption—not an exemption—the constitutional requirement for Senate concurrence in tax exemptions did not apply.

The Refund Must Come from the BIR

The CIR argued that under an administrative issuance, Mitsubishi should claim its refund from NPC, not from the BIR. The Court rejected this argument. The National Internal Revenue Code (NIRC) vests in the CIR the authority to refund erroneously collected taxes. An administrative issuance cannot override a statutory mandate.

The Court noted that the CIR had itself acknowledged Mitsubishi's non-liability through its own administrative rulings. Having collected taxes that Mitsubishi was not required to pay, the BIR was bound to refund them—and could then collect from NPC, which had assumed the liability. The specific administrative issuance numbers cited in the decision are not available in the library, but the decision confirms their existence and effect.

Practical Takeaways

• Tax assumption is not tax exemption. When the government assumes a taxpayer's obligation, the taxpayer remains liable in theory, but the government pays. This distinction matters for constitutional requirements and for determining who must file claims.

• Executive agreements are binding without Senate concurrence. An exchange of notes between governments can create binding obligations, including tax assumption commitments, through executive action alone.

• The BIR refunds erroneously collected taxes. If the BIR collects taxes that another party assumed, the taxpayer's remedy is a refund claim with the CIR under the NIRC—not a claim against the executing agency.

• Administrative issuances cannot override the NIRC. Revenue regulations and circulars must remain consistent with the law they implement. A circular that shifts refund obligations away from the BIR cannot prevail over the statutory scheme.

• Document the assumption clause. Foreign contractors working on government-funded projects should carefully review contracts and international agreements for tax assumption provisions, as these directly affect who bears the tax burden.

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