Back Taxes on Undeclared Improvements: What "Declared for the First Time" Means

When a property owner buys real estate and declares it for tax purposes, the declaration must be complete and accurate. If the local assessor later discovers that the building is actually larger or more valuable than what was declared, the owner may face back taxes for the years the undeclared portion escaped assessment. The Supreme Court addressed this situation in Sesbreño v. Central Board of Assessment Appeals (G.R. No. 106588, March 24, 1997), clarifying the meaning of "declared for the first time" under Presidential Decree No. 464, the Real Property Tax Code.

The Facts of the Case

In 1980, Raul Sesbreño bought two lots in Cebu City, including a "residential house of strong materials." He declared the property for tax assessment as a single-storey house with a 60-square-meter floor area. The City Assessor valued it at P60,000.00.

In 1989, a tax-mapping operation revealed the truth: the building was actually four storeys with a fifth storey used as a roof deck, totaling 500.20 square meters. The City Assessor issued a new tax declaration, canceling the old one and assessing the building at a much higher value. The assessor also imposed back taxes on the undeclared excess area, applying the schedules of value in force since 1981.

Sesbreño protested, arguing the assessment was excessive and that he had bought the property for only P100,000.00. When the Local Board of Assessment Appeals dismissed his appeal, he elevated the case to the Central Board of Assessment Appeals (CBAA), which ordered the issuance of new tax declarations for the undeclared area effective 1981 and 1987. The Supreme Court affirmed the CBAA's ruling.

The Issue: What Does "Declared for the First Time" Mean?

The central question was whether Section 25 of PD 464, which allows back taxes on real property "declared for the first time," could apply to the undeclared excess area of a building that had already been partially declared. Sesbreño argued that since his property was declared in 1980, the back-tax provision did not apply.

The Court rejected this argument, citing the 1919 case Lopez v. Crow. There, the Court held that when a property is discovered to have an area in excess of what was declared, the excess area is deemed "declared for the first time" upon its discovery. Only the area stated in the declaration sheet is considered declared; the area over and above that was never declared. This principle applies equally to building improvements.

The Ruling: Back Taxes Are Proper

The Supreme Court held that Section 25 of PD 464 authorized the imposition of back taxes on the undeclared excess area. The provision states that real property declared for the first time shall have back taxes assessed against it for the period it would have been liable if assessed from the start, but in no case for more than ten years prior to the year of initial assessment.

The Court also rejected the argument that Section 24, which generally gives assessments prospective effect, should apply instead. If Section 24 were applied, the taxpayer would escape paying back taxes on the undeclared area—a result that would deprive the government of revenue and render Section 25 superfluous. The Court emphasized that taxes are the "lifeblood" of the government, and a taxpayer cannot evade obligations by under-declaring property.

Other Points Clarified by the Court

The Court also addressed several related issues:

• Market value vs. acquisition cost. The definition of "market value" in PD 464 does not require the assessor to use the owner's purchase price. Instead, PD 464 requires appraisal at current and fair market value. Acquisition cost is not the sole basis; the current value of similar properties and actual uses are considered.

• Number of storeys matter. A building with more floors has a higher market value than one with fewer floors, all else being equal. Tax declarations must accurately reflect the building's actual area and number of floors.

• General revision of assessments. The back taxes were not imposed under a general revision that had not taken effect. The CBAA correctly applied the applicable schedules of value for the relevant periods.

• No constitutional violation. The imposition of back taxes is not an ex post facto law. PD 464 had been in effect since 1974, and Section 25 is not penal in character.

Practical Takeaways

• Declare improvements accurately. Under-declaring a building's size or number of storeys can lead to back taxes for up to ten years, with interest and penalties.

• "Declared for the first time" includes undeclared excess. If an assessor discovers that a building has more floor area than declared, the excess is treated as newly declared property subject to back taxes.

• Purchase price does not control valuation. The assessor appraises property at current and fair market value, not at what the owner paid.

• Pay under protest before going to court. PD 464 requires a taxpayer to pay the assessed tax under protest before a court will entertain a suit challenging its validity.

• Raise all issues at the administrative level. While appellate bodies may consider related unassigned errors, evidence not presented to the assessor or the local board—such as lease receipts—cannot be introduced for the first time on appeal.

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