In the Philippines, the passing of a spouse triggers a legal and fiscal transition. While many families choose to remain in the family home or continue using conjugal assets without immediate physical partition or transfer of titles, the Bureau of Internal Revenue (BIR) requires the settlement of estate taxes within a specific timeframe.

Failing to document the estate properly—even if you don't intend to "move" the property yet—can lead to heavy penalties, surcharges, and legal complications when the heirs eventually decide to sell or formally transfer the assets.

1. Understanding the Legal Framework

Under the National Internal Revenue Code (NIRC), as amended by the TRAIN Law (Republic Act No. 10963), the estate tax is not a tax on the property itself, but on the privilege of the deceased to transmit their estate to lawful heirs.

For married couples, the property regime—usually Absolute Community of Property (ACP) or Conjugal Partnership of Gains (CPG)—is dissolved upon the death of one spouse. Only the one-half (1/2) share of the deceased spouse in the conjugal assets, plus any exclusive properties, is subject to estate tax.

2. Mandatory Documentary Requirements

To settle the estate tax without an immediate transfer of title (i.e., filing the return and paying the tax due), the following documents must be submitted to the Revenue District Office (RDO) having jurisdiction over the deceased’s last residence.

A. Mandatory General Requirements

BIR Form 1801: Estate Tax Return.
Certified True Copy of the Death Certificate: Issued by the Philippine Statistics Authority (PSA).
Taxpayer Identification Number (TIN): For both the deceased and the heir(s).
Notice of Death: (Required only for deaths occurring prior to Jan 1, 2018).
Certified True Copy of the Marriage Contract: To establish the conjugal nature of the property.

B. Real Property Requirements

Certified True Copy of the Original/Transfer Certificate of Title (OCT/TCT): Issued by the Register of Deeds.
Certified True Copy of the Tax Declaration: Issued by the City or Municipal Assessor’s Office at the time of death.
Certificate of No Improvement: Issued by the Assessor's Office if the lot has no buildings or structures.

C. Personal Property Requirements

Bank Certification: For cash in bank, showing the balance as of the date of death.
Proof of Stocks: Certificate of stocks or proof of ownership in a corporation.
Proof of Ownership of Vehicles: (e.g., OR/CR from the LTO).

D. Special Requirements for Deductions

Certification of the Barangay Captain: To claim the Standard Deduction or the Family Home deduction (the latter can be as high as ₱10 million under current law).
Proof of Claims against the Estate: Notarized debts or loans.

3. The "No Transfer" Scenario: Why File Now?

Heirs often ask: "If we aren't selling the house or changing the name on the title, why do we need to do this?"

Stop the Clock on Penalties: The Estate Tax Return must be filed within one (1) year from the date of death. Failure to file results in a 25% to 50% surcharge plus 12% annual interest.
The Electronic Certificate Authorizing Registration (eCAR): Even if you don't transfer the title to the heirs' names today, the BIR will issue an eCAR once taxes are paid. This document is a "golden ticket"—it proves the government has no more claim over the estate, allowing future generations to sell or mortgage the property without a hitch.
The "Family Home" Benefit: Under the TRAIN Law, the family home deduction is substantial. Filing promptly ensures you lock in the valuation of the property at the time of death, rather than at a much higher future value.

4. Key Deductions to Minimize Tax Liability

When calculating the tax for a deceased spouse’s share of conjugal property, remember these key deductions:

Standard Deduction: ₱5,000,000 (no receipts required).
Family Home: Up to ₱10,000,000, provided it was the actual residence.
Share of Surviving Spouse: 50% of the net conjugal estate is automatically deducted before the tax is computed, as that half belongs to the survivor, not the deceased.

5. Procedures at a Glance

Inventory: List all conjugal and exclusive assets.
Valuation: Use the Zonal Value (BIR) or Assessed Value (Local Government), whichever is higher.
Filing: Submit Form 1801 and the supporting documents to the RDO.
Payment: Pay the 6% flat rate (under TRAIN Law) to an Authorized Agent Bank (AAB).
Issuance: Wait for the BIR to issue the eCAR.

Note: For estates involving complex assets or disputes among heirs, an Extrajudicial Settlement of Estate (EJS) is typically executed alongside these tax filings, even if the title remains in the deceased's name for the time being.

Would you like me to draft a checklist of the specific BIR forms and the current zonal valuation look-up process for your specific city or municipality?