G.R. Nos. L-18843 and L-18844, August 29, 1974
CONSOLIDATED MINES, INC., petitioner, vs. COURT OF TAX APPEALS and COMMISSIONER OF INTERNAL REVENUE, respondents. G.R. Nos. L-18853 & L-18854, August 29, 1974 COMMISSIONER OF INTERNAL REVENUE, petitioner, vs. CONSOLIDATED MINES, INC., respondent.

FACTS

Consolidated Mines, Inc. (CMI), a domestic mining corporation, filed its income tax returns for 1951-1954 and 1956 using the accrual method of accounting. Following a 1957 investigation triggered by CMI’s own claim for a tax refund for 1951, the Commissioner of Internal Revenue issued deficiency income tax assessments for 1951-1954 and 1956. The Commissioner’s adjustments were based on findings that CMI: (1) failed to properly accrue as an expense the profit share due to Benguet Consolidated Mining Company, its mine operator; (2) overcharged depletion and depreciation expenses; and (3) claimed unsubstantiated miscellaneous expenses. CMI contested these assessments before the Court of Tax Appeals (CTA).
The CTA, in an amended decision, nullified the assessments for 1951 and 1952 as time-barred but upheld modified deficiency taxes for 1953, 1954, and 1956. Both parties appealed. CMI assailed the CTA’s approved rate for mine depletion and the disallowance of certain depreciation and miscellaneous expenses. The Commissioner challenged the accounting method approved by the CTA for treating Benguet’s profit share, arguing it created an impermissible hybrid system.

ISSUE

The core issues were: (1) Whether CMI employed a proper method of accounting for the expense representing Benguet’s share in net profits; (2) Whether the CTA correctly determined the allowable rate for mine depletion; and (3) Whether the CTA correctly disallowed certain depreciation charges and miscellaneous expenses.

RULING

The Supreme Court modified the CTA’s decision. On the primary accounting issue, the Court ruled that CMI’s treatment of Benguet’s profit share was improper. CMI used the accrual method but deducted Benguet’s share only from actual cash receipts, not from accrued accounts receivable, thereby adopting a hybrid cash-and-accrual method for this single expense. The Court held that a taxpayer must consistently use one recognized accounting method. Since CMI adopted the accrual method, all expenses, including Benguet’s contingent share, must be accrued in the year the income is earned, not when cash is received. The Commissioner correctly disallowed the deduction of Benguet’s share from accounts receivable until actual collection.
Regarding mine depletion, the Court affirmed the CTA’s factual finding. The correct depletion rate was P0.6196 per ton of chrome ore, not the P1.00 per ton claimed by CMI. This rate was based on the adjusted cost of mining properties and estimated ore reserves, a factual determination supported by evidence. Consequently, CMI overcharged its depletion deductions for the years in question.
On the disallowed expenses, the Court sustained the CTA. The depreciation adjustments were properly affirmed as CMI failed to specifically contest them in its petition before the CTA, thereby waiving the issue. Furthermore, the miscellaneous expenses (e.g., discretionary funds, Christmas gifts) were correctly disallowed for lack of substantial evidence proving they were ordinary and necessary business expenses under the Tax Code.