Prescription in Tax Assessment: Taxpayers' Right to a Timely Assessment

The Supreme Court’s 2018 ruling in Commissioner of Internal Revenue v. Bank of the Philippine Islands (G.R. No. 224327) reinforces a fundamental taxpayer protection: the government’s power to assess and collect taxes is not unlimited. Once the prescriptive period lapses, the BIR loses its right to assess—even if the taxpayer previously negotiated a compromise. This case is a reminder that strict compliance with procedural rules, especially on waivers, cuts both ways.

The Facts of the Case

Citytrust Banking Corporation (CBC) filed its Annual Income Tax Returns for taxable year 1986 on April 15, 1987. Over the next few years, CBC executed several Waivers of the Statute of Limitations under the National Internal Revenue Code (NIRC). On March 7, 1991, the Commissioner of Internal Revenue (CIR) issued a Pre-Assessment Notice against CBC for deficiency taxes, including income tax for 1986 amounting to over P19 million.

CBC protested. The CIR then issued assessment notices on May 6, 1991, which CBC also protested. Negotiations for a compromise settlement dragged on from 1994 to 1995, but the CIR ultimately disapproved the compromise. In the meantime, BPI merged with CBC in 1996, with BPI as the surviving corporation.

Remarkably, it was only in 2011—some 20 years after the original assessment—that the CIR issued a Notice of Denial and a Warrant of Distraint and/or Levy against BPI. BPI challenged the warrant before the Court of Tax Appeals (CTA), which cancelled it. The CTA En Banc affirmed, and the CIR appealed to the Supreme Court.

The Issue

The central question was whether the CIR’s right to assess and collect CBC’s deficiency income tax for 1986 had already prescribed. The CIR argued that BPI was estopped from raising prescription because it had actively participated in the compromise negotiations.

The Ruling

The Supreme Court denied the CIR’s petition and affirmed the CTA’s rulings. The Court held that the right to assess had indeed prescribed.

Under the NIRC, the BIR generally has three years from the date the return is filed (or the due date, whichever is later) to assess a tax deficiency. Here, the return was filed on April 15, 1987, so the three-year period ended in April 1990. The assessment notices issued on May 6, 1991 were therefore already beyond the prescriptive period.

The waivers executed by CBC did not save the assessment. The Court found that the waivers executed on July 12, 1990 and November 8, 1990 did not comply with the proper form required under Revenue Memorandum Order (RMO) No. 20-90. Since a waiver of the statute of limitations is a derogation of the taxpayer’s right to security against prolonged investigations, it must be strictly construed against the BIR. The BIR, having caused the defects in the waivers, could not hide behind the doctrine of estoppel.

The Court also noted that the CIR failed to prove that it validly served the assessment on the taxpayer. While a mailed letter is presumed received in the ordinary course of mail, that presumption is disputable. When the taxpayer denies receipt, the burden shifts to the BIR to prove actual receipt. The CIR’s own witness admitted there was no proof of mailing or receipt.

Key Principles Established

• Three-year prescriptive period: The BIR must assess within three years from filing of the return. Collection must likewise be pursued within the prescribed period.
• Waivers must strictly comply with BIR rules: A defective waiver does not extend the prescriptive period, and the BIR cannot invoke estoppel to cure its own procedural lapses.
• Burden of proof on service: The BIR must clearly and satisfactorily prove the release, mailing, or sending of an assessment notice. Mere notations without supporting evidence are insufficient.
• A taxpayer may challenge a warrant of distraint and/or levy before the CTA, even if the underlying assessment was not directly appealed, where the assessment itself is void for having been issued beyond the prescriptive period.

Practical Takeaways

• Know the three-year rule. If the BIR does not issue a valid assessment within three years from the filing of your return, the right to assess generally prescribes.
• Scrutinize any waiver you sign. A waiver of the statute of limitations must strictly follow BIR regulations. A defective waiver is invalid and will not extend the assessment period.
• Document everything. Keep proof of filing dates, and if you deny receiving an assessment notice, say so clearly—the BIR bears the burden of proving service.
• Don’t assume negotiations stop the clock. Protests and compromise offers do not automatically extend the prescriptive period unless valid waivers are in place.
• A stale warrant can be challenged. If the BIR tries to collect beyond the prescriptive period, a taxpayer may ask the CTA to cancel the warrant of distraint and/or levy.

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