Dealing with Zonal Values vs. Assessed Values: Calculating Fair Market Value for Inherited Land in the Philippines
Introduction: why “valuation” matters in inherited land
When real property is inherited, heirs often discover that the “value” of the land depends on which government record you look at. A tax declaration may show one amount, the local assessor’s schedule of fair market values may show another, and the Bureau of Internal Revenue (BIR) zonal value may be higher still. This matters because estate tax filings generally use a statutorily defined valuation basis—not the heirs’ preferred number. Getting the valuation wrong can lead to deficiency assessments, penalties, and delays in settling the estate.
Governing rule: the taxable value is generally the higher of BIR zonal value or the assessor’s fair market value
For purposes of computing internal revenue taxes on real property (which includes estate tax), the National Internal Revenue Code, as cited in BIR issuances, adopts a “whichever is higher” rule: use (a) the fair market value determined by the Commissioner (BIR zonal value) or (b) the fair market value in the schedule of values of the Provincial/City Assessor. This is reflected in the statutory text quoted in BIR Ruling No. 048-2023 (2019), which cites the Commissioner’s authority to prescribe zonal values and the “whichever is higher” standard for tax computation.
In other words, when heirs are determining the taxable basis of inherited land for BIR purposes, the starting point is typically not the tax declaration’s “assessed value” but the higher between the BIR zonal value and the local assessor’s fair market value schedule. (BIR Ruling No. 048-2023, 2019)
Important distinction: “assessed value” is not the same as “fair market value” for BIR tax base
Heirs frequently confuse these figures:
Fair Market Value (FMV) is the valuation base used to determine the taxable value for internal revenue tax purposes under the “whichever is higher” rule (BIR zonal value vs. assessor’s FMV schedule). (BIR Ruling No. 048-2023, 2019)
Assessed Value is commonly used for local real property tax (RPT) computation and is derived by applying an assessment level to the assessor’s FMV. While it appears on the tax declaration, it is usually not the controlling figure for estate tax valuation.
Step-by-step guide: how heirs can identify the correct taxable basis
Step 1: identify the exact property and classification on the tax declaration
Secure the latest tax declaration and confirm the lot details, area, location, and classification (e.g., residential, agricultural, commercial). Classification affects both assessor schedules and BIR zonal values.
Step 2: get the local assessor’s schedule of fair market values (SMV)
Request from the City/Municipal Assessor the Schedule of Market Values (or the applicable schedule of values) and identify the FMV that matches the property’s classification and location.
Step 3: get the BIR zonal value covering the property
Check the latest BIR zonal valuation schedule applicable to the property’s Revenue District Office (RDO). The BIR updates zonal values through Department of Finance / BIR issuances for specific areas. The governing statutory standard, as quoted in BIR Ruling No. 048-2023 (2019), is that for computing internal revenue tax, use whichever is higher between the BIR-determined FMV and the assessor’s FMV schedule.
Step 4: compare values and use the higher amount as the tax base
As a general rule for internal revenue taxes involving real property, the taxable basis is whichever is higher between:
(1) BIR zonal value; and
(2) Local assessor’s FMV per schedule. (BIR Ruling No. 048-2023, 2019)
Quick reference table: what to compare and what usually controls
Document / Source
What it usually shows
How it is used for inherited land (tax focus)
Tax Declaration
Property details, classification, assessed value, sometimes FMV
Useful for identifying the property and classification; assessed value is typically not the controlling estate tax base.
Assessor’s Schedule of Market Values (SMV)
Local FMV per location/classification
Compared against BIR zonal value; used if higher than zonal value. (BIR Ruling No. 048-2023, 2019)
BIR Zonal Value Schedule
BIR FMV per zone/area
Compared against assessor’s SMV; used if higher than assessor’s FMV. (BIR Ruling No. 048-2023, 2019)
Typical scenarios heirs encounter (with examples)
Scenario A: assessor’s FMV is higher than the zonal value
If the assessor’s FMV per schedule is higher, heirs generally use the assessor’s FMV as the taxable basis under the “whichever is higher” rule. (BIR Ruling No. 048-2023, 2019)
Example: Assessor’s FMV = PHP 3,500/sqm; zonal value = PHP 3,000/sqm. Tax base is PHP 3,500/sqm (subject to other statutory rules and documentation).
Scenario B: BIR zonal value is higher than the assessor’s FMV
If the BIR zonal value is higher, heirs generally use the zonal value. (BIR Ruling No. 048-2023, 2019)
Example: Assessor’s FMV = PHP 2,200/sqm; zonal value = PHP 4,000/sqm. Tax base is PHP 4,000/sqm.
Scenario C: the tax declaration shows a low “assessed value” that seems inconsistent with market reality
A low assessed value does not automatically reduce the estate tax base. The statutory comparison is between the BIR’s zonal valuation and the assessor’s FMV schedule (not the assessed value). (BIR Ruling No. 048-2023, 2019)
What about “fair market value” in court cases—does it change the estate tax base?
In expropriation, the Supreme Court has emphasized that just compensation is a judicial function and that BIR zonal valuation is only one index of fair market value, not the sole basis. Courts may consider multiple factors, and are not strictly bound to a single valuation metric. (Republic of the Philippines v. Heirs of dela Cruz, et al., G.R. No. 245988, 2021)
However, heirs should not confuse expropriation valuation standards with the statutory valuation rule for tax computation. For estate tax compliance, the BIR’s “whichever is higher” standard (zonal value vs. assessor’s schedule) remains the baseline approach reflected in BIR issuances. (BIR Ruling No. 048-2023, 2019)
Common documentation checklist for heirs (to avoid delays)
Heirs typically reduce valuation disputes and processing time by preparing these early:
1) Latest Tax Declaration
2) Certified true copy / excerpt of Assessor’s Schedule of Market Values
3) Copy of the applicable BIR Zonal Value Schedule for the property location
4) Lot plan and technical description (if boundaries/area are questioned)
5) Proof of ownership and transfer documents (e.g., title, if titled)
Practical advice: how to prevent overpayment and deficiency assessments
Confirm you are using the correct “zone” and classification. Errors usually happen when heirs apply the wrong street/barangay zone, or use residential values for land that the assessor/BIR treats as commercial, or vice versa.
Check if the BIR zonal schedule is updated for your RDO. Zonal values can change by issuance; using an outdated schedule can lead to reassessment.
Keep written proof of the schedules used. Attach certified copies or official printouts to your estate tax working papers so you can explain the valuation basis if audited.
How new valuation reforms may affect future practice (general note)
Real property valuation reforms may influence how government agencies harmonize valuation standards over time. Republic Act No. 12001 (Real Property Valuation and Assessment Reform Act, 2024) adopts market value as a single base for real property assessments and related taxes, aiming for uniformity and consistency. Heirs and practitioners should monitor implementing measures and transitions affecting local schedules and valuation references used in tax filings. (Republic Act No. 12001, 2024)
Conclusion: use the higher of zonal value or assessor’s schedule, and document the comparison
For inherited land, heirs should approach valuation as a compliance exercise anchored on the statutory and administrative rule reflected in BIR guidance: determine the property’s taxable value using whichever is higherbetween the BIR zonal value and the local assessor’s schedule of fair market values. (BIR Ruling No. 048-2023, 2019)
As a final step, keep copies of the schedules used, confirm correct property classification and location, and align computations with the latest published valuations to avoid delays, penalties, and deficiency findings.
About Nicolas and De Vega Law Offices
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