Mandanas Ruling: LGUs' Just Share Must Come From All National Taxes

The Supreme Court's ruling in Mandanas v. Ochoa (G.R. No. 199802, July 3, 2018) settled a long-standing question on how the just share of local government units (LGUs) in national taxes should be computed. The decision, which consolidated two petitions, declared that the Internal Revenue Allotment (IRA) must be based on all national taxes, not merely on national internal revenue taxes collected by the Bureau of Internal Revenue (BIR). This clarification has significant implications for the fiscal resources available to provinces, cities, municipalities, and barangays nationwide.

The Constitutional Framework

Section 6, Article X of the 1987 Constitution provides that local government units "shall have a just share, as determined by law, in the national taxes which shall be automatically released to them." This provision embodies three mandates: (1) LGUs are entitled to a just share in national taxes; (2) the share shall be determined by law; and (3) it shall be automatically released.

To implement this, Congress enacted the Local Government Code (Republic Act No. 7160), which set the LGU share at 30% to 40% of "national internal revenue taxes" collected in the third fiscal year preceding the current one. The petitioners argued that this statutory language impermissibly narrowed the constitutional phrase "national taxes" to "national internal revenue taxes," thereby excluding collections made by the Bureau of Customs (BOC) such as excise taxes, value-added taxes, and documentary stamp taxes.

The Petitions and Issues

The petitioners in both consolidated cases challenged the exclusion of BOC-collected taxes from the IRA base. They alleged that billions of pesos in LGU shares were withheld because the computation used only BIR data. The Office of the Solicitor General defended the existing practice, arguing that Congress had discretion to define the base and that the distinction between BIR and BOC collections justified different treatment.

The central issue was whether the provision of the Local Government Code limiting the IRA base to national internal revenue taxes was unconstitutional, contrary to the constitutional mandate that LGUs receive a just share in "national taxes."

The Court's Ruling

The Supreme Court ruled partly in favor of the petitioners. On the procedural question, the Court held that mandamus was not the proper remedy to compel Congress to appropriate funds, as this would violate the doctrine of separation of powers. However, the Court treated the petitions as certiorari actions alleging grave abuse of discretion, given the constitutional challenge raised.

On the substantive issue, the Court found that the Local Government Code's limitation of the IRA base to national internal revenue taxes deviated from the plain language of Section 6, Article X of the Constitution. The phrase "national internal revenue taxes" is more restrictive than "national taxes." The Court invoked the principle verba legis non est recedendum—from the words of a statute there should be no departure—and held that Congress could not narrow the constitutional base without violating the guarantee of fiscal autonomy for LGUs.

The Court emphasized that while Congress has plenary power over local governments, this power is subject to constitutional limitations. The 1987 Constitution's policy of local autonomy, particularly fiscal decentralization, requires that LGUs receive their just share from the broader base of all national taxes.

Practical Takeaways

• The IRA base now includes all national taxes, not just those collected by the BIR. Taxes collected by the Bureau of Customs—such as excise taxes, VAT, and documentary stamp taxes—must be included in computing the LGU share.
• The ruling affirms the constitutional limits on congressional discretion. While Congress determines the percentage share and mechanics of distribution, it cannot alter the constitutional base from which that share is computed.
• LGUs may claim unpaid shares for periods when the narrower base was used, subject to applicable rules on prescription and claims.
• The decision reinforces fiscal autonomy as a constitutional guarantee, not merely a statutory privilege that Congress may restrict at will.
• Local governments should monitor national tax collections from all collecting agencies, not just the BIR, to verify that their shares are correctly computed.

The Mandanas ruling is a landmark affirmation of local fiscal autonomy. By requiring that the just share of LGUs be computed from all national taxes, the Court has ensured that the constitutional promise of decentralization is backed by adequate resources for local governments to fulfill their mandates.

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