A BIR examination of a taxpayer's books and records must be authorized, and the authorizing document is the Letter of Authority (LOA), an official document empowering a revenue officer to examine and scrutinize a taxpayer's books of accounts and other accounting records for a particular taxable period. The LOA requirement is not a formality: jurisprudence is firm that the absence of a valid LOA renders the assessment void, and an LOA issued to one revenue officer does not authorize a different officer to continue the audit; a mere memorandum of assignment or referral reassigning the case to another officer, without a new LOA, is insufficient, and an assessment issued on such an audit is void. The LOA must also specify the taxable period covered, and it generally covers only one taxable year, so an LOA covering unverified prior years is problematic. The audit process typically proceeds through defined stages. First, the LOA is served and the taxpayer presents its books and records. Second, if the revenue officer finds discrepancies, the BIR issues a Notice of Discrepancy (formerly the Notice of Informal Conference), and the taxpayer is given the opportunity for a discussion within the prescribed period. Third, if unresolved, the BIR issues a Preliminary Assessment Notice (PAN) stating the facts, law, rules, and jurisprudence on which the assessment is based; the taxpayer has fifteen (15) days to reply. Fourth, the BIR issues the Formal Letter of Demand and Final Assessment Notice (FLD/FAN); the taxpayer must file a protest within thirty (30) days from receipt, either a request for reconsideration or a request for reinvestigation (the latter requiring the submission of supporting documents within sixty days). Fifth, if the protest is denied or unacted upon within one hundred eighty (180) days, the taxpayer may appeal to the Court of Tax Appeals within thirty (30) days from the denial or from the lapse of the 180-day period. Due process is essential: an assessment that does not state the facts and law on which it is based, or that skips the PAN where required, is void. So a BIR audit requires a valid LOA naming the examining officer, and the assessment must follow the PAN-FAN due process, with strict deadlines for protest and appeal.
The LOA Is Indispensable
A BIR examination must be authorized by a Letter of Authority (LOA). The absence of a valid LOA renders the assessment VOID, and an LOA issued to one officer does not authorize another — a mere memorandum of assignment is insufficient.
The Stages of an Audit
- LOA served, books examined;
- Notice of Discrepancy and discussion;
- Preliminary Assessment Notice (PAN) — reply within 15 days;
- Formal Letter of Demand / Final Assessment Notice (FAN) — protest within 30 days; and
- Appeal to the Court of Tax Appeals within 30 days of denial or the lapse of 180 days.
Due Process Matters
An assessment that fails to state the facts and the law on which it is based, or that skips the PAN where required, is VOID. A request for reinvestigation requires submitting supporting documents within 60 days.
Practical Takeaways
- Always check the LOA — no valid LOA, void assessment;
- Watch the 15-day PAN and 30-day FAN protest deadlines;
- Appeal to the CTA within 30 days of denial or the 180-day lapse.
Frequently Asked Questions
What is a Letter of Authority? The official document empowering a revenue officer to examine and scrutinize a taxpayer's books of accounts and other accounting records for a particular taxable period. Without a valid LOA, the resulting assessment is void.
Can a different revenue officer continue an audit? Not without a new LOA. An LOA issued to one revenue officer does not authorize another officer to continue the audit, and a mere memorandum of assignment reassigning the case is insufficient, rendering the assessment void.
What are the stages of a BIR assessment? Service of the LOA and examination, a Notice of Discrepancy and discussion, a Preliminary Assessment Notice with 15 days to reply, a Formal Letter of Demand and Final Assessment Notice with 30 days to protest, and appeal to the Court of Tax Appeals.
How long do I have to protest a Final Assessment Notice? Thirty days from receipt, by a request for reconsideration or reinvestigation. If reinvestigation, supporting documents must be submitted within sixty days. If denied or unacted upon within 180 days, appeal to the CTA within 30 days.
This commentary is for general informational purposes only and does not constitute legal advice. For guidance specific to your situation, please consult a licensed attorney.
If you have questions about your rights or options under Philippine law, our firm is available to assist. You may reach us via Viber or WhatsApp, call us at 0995 433 5550, or send an email to vivasnobles@gmail.com. We look forward to hearing from you.