Commissioner of Internal Revenue vs. Phoenix Assurance Co., Ltd.

When an amended income tax return substantially modifies the original return by excluding substantial income items and corresponding deductions, the five-year prescriptive period for assessment under Section 331 of the Tax Code commences from the filing of the amended return, not from the date of the original return, thereby preventing taxpayers from evading taxes by initially reporting losses and amending returns after the prescription period has lapsed.

Phoenix Assurance Co., Ltd., a British insurance corporation licensed to do business in the Philippines with its head office in London, entered into worldwide reinsurance treaties whereby it ceded portions of premiums earned from its Philippine underwriting business to foreign reinsurers not doing business in the Philippines. The Commissioner of Internal Revenue assessed withholding taxes on these ceded premiums and deficiency income taxes for various years based on disallowances of deductions claimed for marine insurance reserves and head office expenses. The case presented critical questions regarding the computation of the prescriptive period for tax assessments when amended returns are filed, the taxability of reinsurance premiums under the source rule, and the proper method for computing allowable deductions for foreign insurance companies operating in the Philippines.

• Phoenix Assurance Co., Ltd. is a foreign insurance corporation organized under the laws of Great Britain and licensed to do business in the Philippines, maintaining its head office in London and operating through a Philippine branch
• Through its London head office, Phoenix entered into worldwide reinsurance treaties with various foreign insurance companies, agreeing to cede portions of premiums received on original insurances underwritten by its head office, subsidiaries, and branch offices throughout the world, in exchange for the foreign insurers assuming equivalent portions of the liability from such original insurances
• Phoenix ceded portions of premiums earned from its Philippine underwriting business to foreign reinsurers not doing business in the Philippines in the following amounts: P316,526.75 for 1952, P246,082.04 for 1953, and P203,384.69 for 1954
• On April 1, 1951, Phoenix filed its 1950 income tax return claiming a deduction of P37,147.04 as net addition to marine insurance reserve, computed at 40% of the gross marine insurance premiums received during the year
• The Commissioner of Internal Revenue disallowed P11,772.57 of the 1950 marine reserve claim, fixing the allowable reserve at 100% of marine insurance premiums received during the last three months of the year, and subsequently assessed P1,884.00 as deficiency income tax based on the assumption that ninety-three days approximate the time required before shipments reach their destination or before claims are received
• On April 1, 1953, Phoenix filed its 1952 income tax return showing a net loss of P199,583.93 and claiming a deduction for head office expenses of P35,912.25 computed at 5% of its gross Philippine income
• On August 30, 1955, Phoenix amended its 1952 return excluding from gross income the amount of P316,526.75 representing reinsurance premiums ceded to foreign reinsurers and eliminating corresponding deductions, resulting in a reported tax liability of P2,502.00
• On July 24, 1958, the Commissioner assessed a deficiency income tax of P5,667.00 for 1952 based on the disallowance of P15,826.35 of the claimed head office expenses, representing the difference between the amount claimed at 5% of gross income and the amount allowed at 5% of net income
• For 1953, Phoenix filed its return on April 30, 1954 and amended it on August 30, 1955 to exclude reinsurance premiums ceded of P246,082.04, claiming a refund of P23,409.00 which the Commissioner reduced to P20,180.00 after disallowing P12,304.10 of head office expenses
• For 1954, Phoenix filed its return on April 29, 1955 excluding reinsurance premiums ceded of P203,384.69 and claiming head office expenses of P99,624.75 computed at 5% of gross income, leading to a deficiency assessment of P2,847.00 after the Commissioner recomputed the expenses at 5% of net income
• The Commissioner assessed withholding taxes on the reinsurance premiums ceded to foreign reinsurers for 1952 (P75,966.42), 1953 (P59,059.68), and 1954 (P48,812.32) under Sections 53 and 54 of the Tax Code

• The Commissioner of Internal Revenue contended that the prescriptive period for the 1952 deficiency assessment should be counted from August 30, 1955, the date of the amended return, rather than April 1, 1953, the date of the original return, because the amended return substantially modified the original by excluding substantial income items and deductions, and because the original return showed a loss of P199,583.93 which would have precluded any deficiency assessment based on the disallowance of head office expenses
• The Commissioner argued that reinsurance premiums ceded to foreign reinsurers not doing business in the Philippines pursuant to contracts executed abroad constitute income from sources within the Philippines subject to withholding tax under Sections 53 and 54 of the Tax Code
• The Commissioner maintained that the deduction claimed by Phoenix for net addition to marine insurance reserve for 1950 was excessive and should be limited to the amount equivalent to 100% of marine insurance premiums received during the last three months of the year rather than 40% of annual premiums, based on the formula that ninety-three days approximate the risk period
• The Commissioner asserted that head office expenses allocable to Philippine business should be computed at 5% of net income rather than 5% of gross income as claimed by Phoenix, arguing that only expenses attributable to the Philippine business should be allowed
• The Commissioner argued that the limitation on interest collectible for delinquency to a maximum of three years under Republic Act 2343, which took effect on June 20, 1959, should not be applied retroactively to withholding taxes for years 1952, 1953, and 1954

• Phoenix Assurance Co., Ltd. argued that the right of the Commissioner to assess deficiency income tax for 1952 had prescribed because the assessment was issued on July 24, 1958, more than five years after the filing of the original return on April 1, 1953, invoking Section 331 of the Tax Code which limits assessment to five years from the date the return was filed
• Phoenix contended that the original return was complete and contained sufficient information for the Commissioner to compute the tax liability, and that the amended return merely corrected errors without substantially changing the return's character
• Phoenix maintained that reinsurance premiums ceded to foreign reinsurers not doing business in the Philippines should not be subject to withholding tax because they do not constitute income from sources within the Philippines, as the contracts were executed abroad and the reinsurers had no Philippine presence
• Phoenix argued that the deduction of P37,147.04 claimed as net addition to marine insurance reserve for 1950 computed at 40% of gross marine premiums was proper, reasonable, and not excessive under Section 32(a) of the Tax Code
• Phoenix argued that head office expenses allocable to Philippine business should be computed at 5% of gross Philippine income rather than net income, asserting that the Tax Code does not specify net income as the basis for such computation
• Phoenix claimed it should be absolved from payment of statutory penalties for non-filing of withholding tax returns because its failure to file was due to the Commissioner's opinion expressed in prior rulings that no withholding tax was due on such reinsurance premiums

• Procedural Issues: Whether the right of the Commissioner of Internal Revenue to assess deficiency income tax for the year 1952 against Phoenix Assurance Co., Ltd. has prescribed, specifically whether the five-year period under Section 331 of the Tax Code should be counted from the filing of the original return on April 1, 1953 or from the filing of the substantially modified amended return on August 30, 1955
• Substantive Issues: Whether reinsurance premiums ceded to foreign reinsurers not doing business in the Philippines pursuant to contracts executed abroad are subject to withholding tax under Sections 53 and 54 of the Tax Code as income from sources within the Philippines; whether the deduction claimed by Phoenix for net addition to marine insurance reserve for 1950 is excessive under Section 32(a) of the Tax Code and Section 186 of the Insurance Law; whether deductions claimed for head office expenses allocable to Philippine business for 1952, 1953, and 1954 should be computed based on gross income or net income under Section 30(a)(2) of the Tax Code; and whether the limitation on interest for delinquency to three years under Republic Act 2343 applies retroactively to withholding taxes for 1952-1954

• Procedural: The Supreme Court ruled that the right of the Commissioner to assess deficiency income tax for 1952 has not prescribed because the five-year period under Section 331 of the Tax Code should be counted from the filing of the amended return on August 30, 1955, not the original return on April 1, 1953, given that the amended return substantially modified the original by excluding reinsurance premiums received from domestic insurance companies by the London head office, reinsurance premiums ceded to foreign reinsurers not doing business in the Philippines, and various items of deduction attributable to such excluded reinsurance premiums, and because the original return's declared loss of P199,583.93 would have more than offset the disallowance of head office expenses of P15,826.35, making it impossible for the Commissioner to determine a deficiency from the original return alone
• Substantive: The Court held that reinsurance premiums ceded to foreign reinsurers are income from sources within the Philippines subject to withholding tax under Sections 53 and 54 of the Tax Code, following the doctrine established in British Traders' Insurance Co., Ltd.; that the deduction for marine insurance reserve was not excessive because the amount claimed (P37,147.04 or 40% of premiums) was less than the statutory requirement under Section 186 of the Insurance Law which mandates 50% of premiums on yearly risks and 100% of premiums on other marine risks not terminated, and a taxpayer may deduct a lesser amount but not exceed the statutory limit; that head office expenses must be computed at 5% of net income derived from Philippine business rather than gross income pursuant to Section 30(a)(2) of the Tax Code which allows deductions only for expenses paid or incurred in carrying on business conducted within the Philippines; and that the three-year limitation on interest for delinquency under Section 51(c)(2) as amended by Republic Act 2343 applies because the taxpayer could only be held liable for statutory penalties after the Court of Tax Appeals judgment dated February 14, 1962, which was subsequent to the effectivity of Republic Act 2343 on June 20, 1959

• Prescriptive Period for Substantially Modified Amended Returns — When an amended income tax return substantially alters the original return by excluding substantial amounts of income and corresponding deductions, the five-year prescriptive period for assessment under Section 331 of the Tax Code commences from the filing of the amended return, not the original return, to prevent taxpayers from circumventing tax liabilities by initially reporting losses and subsequently amending returns after the original prescription period has expired
• Source of Income Rule for Reinsurance Premiums — Reinsurance premiums ceded to foreign reinsurers not doing business in the Philippines pursuant to contracts executed abroad constitute income from sources within the Philippines when they arise from original insurances underwritten in the Philippines, and are therefore subject to withholding tax under Sections 53 and 54 of the Tax Code
• Statutory Limits on Insurance Reserve Deductions — While the Insurance Law mandates specific reserve requirements as a safeguard to the general public and such requirements must be strictly followed for insurance regulatory purposes, for income tax purposes a taxpayer may deduct a lesser amount than the statutory reserve requirement, but cannot claim a deduction beyond the amount authorized by Section 32(a) of the Tax Code
• Allocation of Head Office Expenses for Foreign Corporations — For foreign corporations, head office expenses are deductible only to the extent they relate to business conducted within the Philippines under Section 30(a)(2) of the Tax Code, and must be computed based on net income attributable to Philippine operations rather than gross income to ensure that only expenses allocable to the Philippine business are deducted from Philippine-sourced income

• "The object of the Tax Code is to impose taxes for the needs of the Government, not to enhance tax avoidance to its prejudice."
• "To our mind, the Commissioner's view should be sustained. The changes and alterations embodied in the amended income tax return consisted of the exclusion of reinsurance premiums received from domestic insurance companies by Phoenix Assurance Co., Ltd.'s London head office, reinsurance premiums ceded to foreign reinsurers not doing business in the Philippines and various items of deduction attributable to such excluded reinsurance premiums thereby substantially modifying the original return."
• "The reserve called for in Section 186 is a safeguard to the general public and should be strictly followed not only because it is an express provision but also as a matter of public policy."
• "What is prohibited by the income tax law is to claim a deduction beyond the amount authorized therein."

• British Traders' Insurance Co., Ltd. v. Commissioner of Internal Revenue, G.R. No. L-20501, April 30, 1965 — Cited as controlling precedent establishing that reinsurance premiums ceded to foreign reinsurers are income from sources within the Philippines subject to withholding tax under Sections 53 and 54 of the Tax Code
• Alexander Howden & Co., Ltd. v. Commissioner of Internal Revenue, G.R. No. L-19392, April 14, 1965 — Cited as additional precedent supporting the holding that reinsurance premiums are subject to withholding tax
• Philippine Guaranty Co., Inc. v. Commissioner of Internal Revenue, G.R. No. L-22074, April 30, 1965 — Cited as further authority on the taxability of reinsurance premiums as Philippine-sourced income
• Maryland Casualty Co. v. United States, 251 U.S. 342 (1920) — Cited for the interpretation of charges for liability on insurance contracts as reserves in the context of insurance company taxation

• Section 331 of the National Internal Revenue Code (Tax Code) — Prescribes the five-year period of limitation for assessment of internal revenue taxes from the date of filing of the return, interpreted by the Court to run from the amended return when it substantially modifies the original
• Section 306 of the National Internal Revenue Code — Prescribes the two-year prescriptive period for filing claims for refund of taxes, cited in the factual background regarding Phoenix's refund claim for 1953
• Sections 53 and 54 of the National Internal Revenue Code — Provisions governing withholding taxes on income paid to non-resident aliens and foreign corporations, applied by the Court to uphold the withholding tax assessments on reinsurance premiums ceded to foreign reinsurers
• Section 32(a) of the National Internal Revenue Code — Allows insurance companies to deduct net additions to reserve funds and sums paid on policy and annuity contracts from gross income, subject to the condition that released reserves be treated as income
• Section 186 of the Insurance Law — Mandates specific reserve requirements for marine insurance (50% of premiums on yearly risks and 100% of premiums on other marine risks not terminated), cited to establish the maximum allowable deduction for marine reserves and the standard against which the claimed deduction was measured
• Section 30(a)(2) of the National Internal Revenue Code — Limits deductible expenses of non-resident aliens and foreign corporations to those paid or incurred in carrying on business conducted within the Philippines, applied to justify computing head office expenses based on net Philippine income rather than gross income
• Section 51(c)(2) of the National Internal Revenue Code as amended by Republic Act 2343 — Limits the collection of interest on unpaid taxes to a maximum period of three years, applied by the Court to delinquencies occurring after the judgment of the Court of Tax Appeals