Local Autonomy vs Congressional Power: Defining the Just Share in National Taxes

The Supreme Court's 2018 ruling in Mandanas v. Ochoa settled a long-running dispute over how much of the national tax collection belongs to local government units (LGUs). The case clarified the meaning of the constitutional guarantee that LGUs shall have a "just share" in national taxes, and in doing so, expanded the base from which that share is computed. The decision affects every province, city, municipality, and barangay in the country, and it continues to shape fiscal policy today.

The Dispute: What Counts in the Base?

The 1987 Constitution guarantees LGUs a just share in national taxes, which shall be automatically released to them. Congress implemented this guarantee through the Local Government Code (Republic Act No. 7160), which provides LGUs a share of national internal revenue taxes—specifically, 40% of collections from the third fiscal year preceding the current one.

The petitioners in the consolidated cases argued that the phrase "national internal revenue taxes" was too narrow. They pointed out that the Bureau of Customs collects certain taxes—such as excise taxes, value-added tax, and documentary stamp tax on imported goods—that are national taxes but were not being included in the base for computing the LGUs' share. This exclusion, they said, deprived LGUs of billions of pesos.

The Issue: Did Congress Exceed Its Authority?

The central question was whether the Local Government Code, by limiting the base to internal revenue taxes, violated the constitutional mandate that LGUs receive a just share in national taxes. The petitioners also raised procedural questions about whether mandamus was the proper remedy.

The Ruling: The Constitution Prevails

The Supreme Court ruled that the relevant provision of the Local Government Code was unconstitutional insofar as it restricted the base to national internal revenue taxes. The Court held that Congress had departed from the plain language of the Constitution, which speaks of "national taxes"—a broader term.

The Court emphasized the principle verba legis non est recedendum: from the words of a statute, there should be no departure. Congress, in enacting the Local Government Code, had used language more restrictive than the Constitution itself. This was impermissible because congressional power, while plenary, remains subject to constitutional limitations.

The Court also addressed the relationship between Congress and LGUs. While local governments remain subject to the will of Congress under what is known as Dillon's Rule, the Constitution imposes limits on that control. The fiscal autonomy guaranteed to LGUs means that Congress cannot diminish the base from which their just share is computed.

Significantly, the Court treated the petitions as challenges to the constitutionality of the Local Government Code provision, even though they were filed as petitions for mandamus. The Court noted that the allegations of grave abuse of discretion justified treating them as petitions for certiorari, which is the proper vehicle for challenging the validity of legislative action.

The Practical Effect

The ruling means that the base for computing the LGUs' share must now include all national taxes collected by the Bureau of Internal Revenue and the Bureau of Customs, not just internal revenue taxes. This includes excise taxes, value-added tax, and documentary stamp taxes collected on imports.

The Court did not, however, grant the petitioners' request for retroactive payment of unpaid shares dating back to 1992. The ruling was prospective in its application.

Practical Takeaways

• The base is broader than before. LGUs' shares must now be computed from all national taxes, not just internal revenue taxes collected by the BIR.
• Congress cannot narrow constitutional guarantees. When the Constitution says "national taxes," Congress cannot substitute a more restrictive phrase without violating the Constitution.
• Local autonomy has constitutional limits on congressional power. While Congress retains control over LGUs, that control is subject to explicit constitutional protections, including the guarantee of fiscal autonomy.
• The ruling affects national budgeting. The expanded base means larger shares for LGUs, which must be factored into annual appropriations.
• The decision was prospective. LGUs cannot claim arrears for past years based on the expanded base.

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