The ARP number in a tax declaration is the Assessment of Real Property number that your city or municipal assessor assigns to identify a specific parcel of land or improvement in the assessment records. It appears near the top of the tax declaration, usually labeled “ARP No.” or “TD/ARP No.,” and it functions as your property’s account number for real property tax purposes.
What the ARP Number Is For
Every assessed property in the Philippines has one. The Bureau of Local Government Finance describes ARP and tax declaration numbers as codes “assigned to every assessment of real property unit” and recorded on both the Field Appraisal and Assessment Sheet and the tax declaration itself.1Bureau of Local Government Finance. Manual on Real Property Appraisal and Assessment Operations Republic Act 7160, the Local Government Code, requires the local assessor to “install and maintain a real property identification and accounting system” covering all taxable and exempt properties in the jurisdiction.2Lawphil. Republic Act 7160 – Local Government Code of 1991
In practice, you use the ARP number whenever you deal with your property’s taxes. Assessor’s office and treasurer’s office staff pull up your record by searching this number. It appears on the annual real property tax receipts. If you are buying or selling, matching the ARP number on the tax declaration against the assessor’s records is one of the checks that confirms you are looking at the right property.
Where to Find It on the Tax Declaration
On most tax declaration forms, the ARP number sits near the top of the document, often in the upper right corner or centered just below the document title. The label reads “ARP No.” or “TD/ARP No.,” printed directly before the number.
Nearby, in a separate box, you will usually see another code called the Property Index Number, or PIN. It is easy to mix the two up. The PIN identifies the physical land parcel and stays with the parcel even when ownership changes; if a lot is subdivided, the original PIN is retired and new PINs are assigned to the resulting parcels.1Bureau of Local Government Finance. Manual on Real Property Appraisal and Assessment Operations The ARP number is tied to the assessment record, not the land, so it can change while the PIN stays the same.
How the Number Is Structured
The digits are not random. Each segment stands for a geographic or administrative level, and the format shifts slightly by location.
- Provincial properties usually follow the pattern 00-0000-00000. The first two digits are the municipality, the next four the barangay, and the last five the sequential assessment count within that barangay.
- Cities outside Metro Manila use the same 00-0000-00000 format, but the first two digits identify the district rather than the municipality.
- Metro Manila properties carry an additional letter prefix marking the general revision cycle. “A” or “AA” marks the first general revision after the Local Government Code took effect in 1992, “B” or “BB” the second, and so on. The rest of the number follows the district-barangay-count pattern.
The assessment count starts at 00001 for the first property assessed in a given barangay and rises from there.1Bureau of Local Government Finance. Manual on Real Property Appraisal and Assessment Operations The dashes or spaces you see on the document generally mark the boundaries between these segments.
ARP Number vs. Property Index Number
The distinction matters because homeowners often assume the two are interchangeable. They are not.
The PIN is a physical identifier for the parcel. It answers the question, “Which piece of land is this?” It remains stable across ownership changes and is only retired when the parcel itself is altered, such as through subdivision or consolidation.
The ARP number is an accounting identifier for the assessment. It answers the question, “Which record in the assessor’s books governs the tax on this property right now?” A single parcel can go through several ARP numbers over the years, one for each new tax declaration issued on it.
When Your ARP Number Changes
Your ARP number is not permanent. The BLGF manual specifies that “initial numbering shall be done every time a general revision of real property assessments is conducted.”1Bureau of Local Government Finance. Manual on Real Property Appraisal and Assessment Operations A new tax declaration with a new ARP number is also issued when the property changes hands, is reclassified, changes in area, or is physically altered.
When a new tax declaration is issued, the old ARP number is effectively retired. The new document should reference the previous tax declaration it cancels. Keep both the old and new tax declarations in your records. Tracing the sequence of ARP numbers is sometimes necessary in land disputes or when you need to show continuous tax payment on a property. If you are not sure whether a general revision has caught your parcel, call or visit the municipal or city assessor’s office and ask whether a new tax declaration has been issued.
Under Republic Act 12001, the Real Property Valuation and Assessment Reform Act signed in 2024, local government units must now update their schedule of market values and conduct general revisions every three years.3Lawphil. Republic Act 12001 – Real Property Valuation and Assessment Reform Act Going forward, ARP numbers will change on a more regular schedule than in the past, when some LGUs let decades pass between revisions.
A Tax Declaration Is Not Proof of Ownership
One clarification worth making, because it comes up whenever ARP numbers do: holding a tax declaration and paying the real property tax does not, by itself, make you the legal owner. The Supreme Court has held that “tax declarations are not conclusive evidence of ownership or of the right to possess land when not supported by any other evidence” and are “merely indicia of a claim of ownership.”4Supreme Court E-Library. G.R. No. 203090 – Kawayan Hills Corporation v. Court of Appeals
The tax declaration and its ARP number are assessment records maintained by the local government for taxation. Conclusive proof of ownership is a certificate of title issued through the Register of Deeds under the Torrens system. Tax declarations can support an ownership claim when combined with long, open, continuous, and exclusive possession, particularly for unregistered land, but on their own they carry limited weight. If you only have a tax declaration for a property, consider consulting a lawyer about securing a proper title.