G.R. No. 104151 & G.R. No. 105563. March 10, 1995.
COMMISSIONER OF INTERNAL REVENUE, petitioner, vs. COURT OF APPEALS, ATLAS CONSOLIDATED MINING AND DEVELOPMENT CORPORATION and COURT OF TAX APPEALS, respondents. ATLAS CONSOLIDATED MINING AND DEVELOPMENT CORPORATION, petitioner, vs. COURT OF APPEALS, COMMISSIONER OF INTERNAL REVENUE and COURT OF TAX APPEALS, respondents.

FACTS

The Commissioner of Internal Revenue (CIR) assessed Atlas Consolidated Mining and Development Corporation (ACMDC) for deficiency ad valorem and business taxes for 1975 and 1976. ACMDC protested. The Court of Tax Appeals (CTA) ruled that ACMDC was not liable for the main deficiency ad valorem taxes on copper and silver, agreeing that in computing the tax base, refining and smelting charges should be deducted from the London Metal Exchange price, along with freight and insurance. However, the CTA held ACMDC liable for a reduced amount covering surcharges for late payment and filing on certain minerals, plus deficiency manufacturer’s sales and contractor’s taxes.
Both parties appealed to the Court of Appeals (CA). In CA-G.R. SP No. 25945, the CA affirmed the CTA’s ruling on the deductibility of smelting and refining charges. In CA-G.R. SP No. 26087, the CA modified the CTA decision by deleting some surcharges for the period November 1, 1974 to December 31, 1975, further reducing ACMDC’s liability. The CIR and ACMDC then filed separate petitions for review with the Supreme Court, which were consolidated.

ISSUE

The consolidated petitions raised the following issues: (1) In G.R. No. 104151 , whether smelting and refining charges are deductible from the market price of copper concentrates in computing the ad valorem tax; and (2) In G.R. No. 105563, whether ACMDC is liable for the remaining deficiency assessments for surcharges, manufacturer’s sales tax, and contractor’s tax.

RULING

The Supreme Court denied both petitions and affirmed the CA decisions. On the first issue, the Court upheld the deductibility of smelting and refining charges. The legal logic is grounded in the specific tax base defined by Section 244 of the National Internal Revenue Code, which imposes the ad valorem tax on the “actual market value” of the mineral product. The “actual market value” refers to the price of the mineral in its condition at the time of removal from the mine—the “mine mouth” value. For ACMDC’s copper concentrates, which required smelting and refining to become commercially acceptable metal, the costs of these necessary processes, like freight and insurance, are not intrinsic to the mineral’s value at the mine. Deducting these charges correctly arrives at the actual market value of the concentrates themselves, not the value of the processed metal.
On the second issue, the Court sustained ACMDC’s liability for the remaining assessments. The surcharges for late filing of notices of removal were properly imposed as a penalty for violating a clear statutory requirement. Regarding the deficiency contractor’s tax on equipment leases, the Court found that ACMDC’s activity of leasing its own equipment to its mining contractors constituted a separate business subject to the tax, as it was pursued for profit and was distinct from its primary mining operations. The assessments were based on sufficient evidence and correctly computed.