Title
Philippine National Bank vs. AIC Construction Corp.
Case
G.R. No. 228904
Decision Date
Oct 13, 2021
AIC Construction challenged PNB's unilateral interest rates and foreclosure, leading to Supreme Court ruling that rates were unconscionable, void, and replaced with 12% legal interest.

Case Summary (G.R. No. 40681)

Petitioner

Philippine National Bank, a government-chartered banking institution that determined variable interest rates based on its prime rate plus a spread, applied unilaterally determined rates to the loan.

Respondents

AIC Construction Corporation and spouses Rodolfo C. Bacani and Ma. Aurora C. Bacani, borrowers and guarantors who challenged the validity and excessiveness of interest and penalty charges and sought exemption of their family home from foreclosure.

Key Dates

• 1988: Current account opened; July 4, 1989: P10 million credit line granted.
• September 1998: Loan maturity—principal and capitalized interest totaled ₱65 million.
• April 30, 2001: Final demand for ₱140,837,511.29.
• January–February 2002: Foreclosure notices issued; complaint filed February 27, 2002.
• December 5, 2013: RTC decision dismissing complaint; February 5, 2015: denial of reconsideration.
• October 11, 2016: Court of Appeals decision modifying interest and penalties; December 28, 2016: denial of CA reconsideration.
• October 13, 2021: Supreme Court decision.

Applicable Law

• 1987 Philippine Constitution – equitable protection, freedom to contract subject to public welfare.
• Civil Code Articles 1306 (freedom of contract) and 1308 (mutuality principle).
• Republic Act No. 3765 (Truth in Lending Act).
• Nacar v. Gallery Frames (legal interest rate).
• Jurisprudence on unconscionable interest (Vitug v. Abuda; Castro v. Tan; Spouses Silos v. PNB).

Factual Background

PNB’s credit agreement provided that interest would accrue at “the rate per annum which is determined by the Bank to be the Bank’s prime rate plus applicable spread in effect as of the date of the relevant availment.” Over ten years, PNB capitalized interest and continuously increased the credit line to ₱65 million. Respondents’ proposals to extinguish the debt by dacion en pago were not accepted. Foreclosure ensued, including the family home.

Procedural History

Respondents filed for annulment of interest and penalty charges, accounting, exemption of family home, and damages. The Regional Trial Court dismissed their complaint for lack of proof of inequitable interest. On appeal, the Court of Appeals held PNB acted in good faith but found the interest and penalties unconscionable, applied the 12% legal rate, and excluded penalties from the secured amount. PNB petitioned for certiorari.

Issue

Whether the Court of Appeals erred in declaring PNB’s variable interest rates and penalty charges usurious and unconscionable and in applying the legal interest rate in lieu of the contractual rates.

Supreme Court’s Analysis

The Court affirmed the CA ruling under the 1987 Constitution. It reaffirmed the principle of mutuality (Art. 1308): contractual validity or compliance cannot be left to one party’s will. Monetary interest may be stipulated freely (Art. 1306) but must not be iniquitous or unconscionable. The Court cited Vitug v. Abuda and Castro v. Tan to underscore judicial power to equitably reduce unfair interest and cited Nacar for the 12% legal rate where market rates violate public morals.

Principle of Mutuality and Equitable Reduction of Unconscionable Interest

Interest provisions that allow unilateral, subjective determination by the lender—without true meeting of the minds on rate or spread—violate mutuality and public policy. Even knowing and voluntary agreements may be equitably reduced if found “immoral and unjust,” given market imperfections and unequal bargaining power. Truth in Lending Act (RA 3765) requires full disclosure of credit costs; failure to do so exposes the lender to sanctions.

Application to the Present C

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