Assessment Process | Tax Remedies | National Internal Revenue Code of 1997 (NIRC), as amended by R.A. No.… | TAXATION LAW

Here is a meticulous breakdown on the Assessment Process under the National Internal Revenue Code (NIRC) of 1997, as amended by the Tax Reform for Acceleration and Inclusion (TRAIN) Law and further modified by the Ease of Paying Taxes Act (R.A. No. 11976). This summary covers the legal and procedural framework involved in the tax assessment process in the Philippines.


I. Overview of the Assessment Process

The assessment process is a key phase in tax administration where the Bureau of Internal Revenue (BIR) determines the tax due from a taxpayer. The process of assessing tax liabilities is governed by the National Internal Revenue Code (NIRC) as amended by recent legislation including the TRAIN Law and R.A. No. 11976 (Ease of Paying Taxes Act). This stage includes issuing notices and finalizing assessments when there is a discrepancy between the taxpayer’s declared liabilities and the BIR’s findings.

II. Legal Basis and Amendments to the NIRC

  1. National Internal Revenue Code of 1997: The foundational law governing tax collection and assessment processes.
  2. TRAIN Law (R.A. No. 10963): This 2018 law introduced significant reforms, including simplified income tax rates and revised tax thresholds.
  3. Ease of Paying Taxes Act (R.A. No. 11976): Enacted in 2023, it aims to simplify and streamline the tax compliance process, including assessment and remedies available to taxpayers.

III. The Assessment Process under the NIRC

The assessment process generally follows these steps:

  1. Letter of Authority (LOA) Issuance

    • The BIR begins the audit or investigation process through a Letter of Authority (LOA), which empowers a revenue officer to examine a taxpayer's books and records.
    • Requirements under R.A. No. 11976: An LOA is valid only if signed by authorized personnel, including the Commissioner of Internal Revenue or duly authorized deputies.
  2. Notice of Discrepancy (NOD)

    • The Notice of Discrepancy is issued when discrepancies are found during the audit. The NOD allows the taxpayer to reconcile records or explain identified variances.
    • Response Time: Taxpayers are given 30 days to respond, either to refute findings or agree with adjustments.
  3. Pre-Assessment Notice (PAN)

    • If the taxpayer’s explanation for discrepancies is unsatisfactory or unresolved, the BIR may issue a Pre-Assessment Notice (PAN), indicating the deficiencies.
    • Contents: The PAN should contain the legal basis for the assessment, the deficiency amounts, and reasons for the findings.
    • Response Period: The taxpayer has 15 days to reply to the PAN, explaining or contesting the assessment.
  4. Formal Letter of Demand and Final Assessment Notice (FAN)

    • Following an unresolved PAN, the BIR issues a Formal Letter of Demand with a Final Assessment Notice (FAN).
    • Legal Requirements: The FAN must contain the specific amount of tax liability, the basis for the assessment, and penalties.
    • Protest Window: Taxpayers have 30 days to file a protest against the FAN; failure to do so results in the FAN becoming final and executory.
  5. Protest and Administrative Review

    • Protest Submission: Taxpayers must file either a request for reconsideration or a request for reinvestigation to contest the FAN. The protest must include specific points of disagreement and supporting documents.
    • 120-Day Period: The BIR has 120 days to act on the protest. If the BIR does not act within this period, the protest is considered denied.
  6. Appeal to the Court of Tax Appeals (CTA)

    • 30-Day Rule: If the protest is denied or unresolved within 120 days, the taxpayer has 30 days to appeal to the CTA.
    • Jurisdiction and Timeline: Appeals to the CTA must follow strict procedural timelines. The CTA reviews the legal merits of the BIR’s assessment and the taxpayer's arguments.

IV. Key Amendments from the Ease of Paying Taxes Act (R.A. No. 11976)

R.A. No. 11976 introduced several procedural changes to improve taxpayer experience and reduce administrative burden:

  1. Simplified and Modernized Tax Administration

    • Emphasis on e-filing and digital records submission to streamline assessment processes.
    • The Act encourages the BIR to use electronic systems to issue notices and streamline documentation requirements for assessments.
  2. Clearer Notification Requirements

    • Strengthens due process rights by requiring the BIR to communicate clearer, detailed assessment notices.
    • Clarifies the procedure and timelines for issuing PANs, FANs, and handling protests.
  3. Increased Transparency and Efficiency

    • R.A. No. 11976 mandates transparency in the audit process, requiring revenue officers to fully disclose assessment bases and computation details in all notices.
    • Reduces discretion in assessments by standardizing BIR procedures, ensuring that taxpayers understand and can respond adequately.

V. Key Legal Doctrines Related to Tax Assessments

  1. Due Process in Tax Assessments

    • The Supreme Court has repeatedly emphasized that due process is essential in tax assessments. Taxpayers must receive adequate notice and opportunity to respond to all stages in the assessment process.
  2. Doctrine of Finality of Assessments

    • Once a FAN becomes final and executory (due to failure to file a protest or appeal), it can no longer be challenged administratively or judicially.
  3. Strict Compliance with LOA Requirements

    • Any assessment without a valid LOA is void, as held in multiple cases. Unauthorized investigations or assessments violate taxpayer rights and cannot result in enforceable assessments.
  4. Requirement for Valid Notice of Assessment

    • The BIR must specify the legal and factual bases for tax deficiencies. Vague or incomplete assessments are invalid and cannot be enforced.

VI. Remedies Available to Taxpayers

Taxpayers have several administrative and judicial remedies:

  1. Administrative Protest

    • Taxpayers can file either a request for reconsideration (disputing the findings based on evidence already on record) or a request for reinvestigation (providing new evidence).
  2. Appeal to the Court of Tax Appeals (CTA)

    • If a protest is denied or unresolved, taxpayers may appeal to the CTA for a judicial review.
  3. Compromise Settlement

    • Taxpayers may seek a compromise if unable to fully pay assessed liabilities, subject to the BIR’s approval. Compromise is typically considered for taxpayers in financial hardship or when there is a valid question of law or fact.
  4. Payment Under Protest

    • In certain cases, taxpayers may choose to pay assessed taxes “under protest” and subsequently pursue refunds or credits through litigation.
  5. Abatement of Penalties

    • The BIR Commissioner has the authority to abate or cancel interest and penalties in cases of erroneous or wrongful assessments.

VII. Conclusion

The assessment process under the NIRC, as amended, remains an area of robust taxpayer protection while aiming to uphold revenue collection. The TRAIN Law and R.A. No. 11976 reinforce fair, efficient, and transparent procedures, emphasizing a taxpayer’s right to due process and facilitating ease of compliance. Taxpayers and practitioners must stay vigilant about procedural requirements to effectively contest or manage assessments, especially given the rigid timelines governing the protest and appeals process.


This comprehensive guide should help in understanding the assessment process, amendments, and remedies. Each stage requires strict compliance with legal procedures to safeguard the taxpayer’s rights and ensure that the BIR’s assessment is lawful and enforceable.

Disclaimer: This content is not legal advice and may involve AI assistance. Information may be inaccurate.