The new tax audit landscape

By Ronald Bernas and Joshua Tan

In 2025, the Bureau of Internal Revenue (BIR) suspended all its audit and field operations to realign its audit strategy and processes. This stemmed from congressional probes concerning the agency’s alleged “weaponization” of letters of authority (LOAs) and supposed anomalous audit practices.

In a public consultation, the BIR presented a five-point priority reform and legacy agenda aimed at digital transformation, audit accountability and service excellence. Following this, on Jan. 27, 2026, the BIR announced the resumption of all tax audit and field operations, signaling its readiness to implement the revised audit framework under reinforced controls and procedures.

These reforms entail changes that will affect taxpayers moving forward with the outset and key reform being the issuance of only one electronic letter of authority (eLA) per taxable year that will cover the tax assessment for all tax types, such as income tax, value-added tax, withholding tax, final taxes and documentary tax stamp. This aims to simplify the audit process by removing the need to coordinate with different BIR officers concerning different audit cases. In essence, the taxpayer will generally face only one audit review for each taxable year.

Starting March 4, 2026, multiple eLAs covering the same taxable year will be automatically consolidated into one. As such, unless the taxpayer requests non-consolidation, all other previous eLAs will be canceled and replaced by a single consolidated one by May 4, 2026. The new system envisions a “single‑instance audit framework” in which taxpayers may expect a more predictable and efficient audit protocol.

Risk-based and system-assisted approach

In response to the recurring concerns about the misuse of LOAs, the BIR plans to implement a risk-based and system-assisted audit selection approach.

This process begins with the system generating an anonymized list of taxpayers who are preselected based on specific criteria, among which are disproportionate financial ratios, data mismatches, reporting discrepancies, automatic-audit events and industry risks. The BIR commissioner will then personally review the case dockets to determine and approve the shortlist of taxpayers who will be issued the eLA. The case is then assigned to BIR officials who will handle the audit investigation.

The BIR acknowledges past vulnerabilities in its system and seeks to reshape its audit selection process into a fairer, more objective and data-driven affair. This new framework aims to end the practice of singling out large taxpayers to drive up collection targets.

To streamline their audit operations, the BIR is also introducing stronger oversight measures and audit safeguards. This includes standardizing its checklist of requirements, administering proper documentation and official communication channels, and keeping the audit process orderly and transparent.

These measures are meant to minimize the issuance of “bloated” or “exaggerated” tax assessments by ensuring that audit findings are backed by verified facts, supported by clear legal basis and subjected to closer supervisory review. With these enhanced parameters, it could be less likely for taxpayers to be pressured into unreasonable tax settlements and compromised payments.

The BIR will also undergo extensive reorganization with the phasing out of various offices, units and task forces to realign their services and functions under the new regimen. This is in line with the agency’s continued pursuit to bring about a service‑oriented approach to tax administration as it fulfills the mandate to collect funds needed for nation‑building, consistent with the new BIR leadership’s endeavor of implementing and guiding the transition to a more modern tax framework.

All these reforms are intended to rebuild public trust in the BIR, encouraging taxpayers to engage more openly during audit investigations and comply responsibly with their tax obligations. While tax practitioners and stakeholders welcome this reform toward transparency, efficiency and predictability in the audit process, the real test lies in ensuring that the commitments are consistently upheld.

There remains much to uncover as the BIR continues to develop its new audit reform agenda. The BIR is expected to issue more comprehensive regulations by April 16, 2026, covering the rules for systematic selection of taxpayers for audit, case assignment and eLA issuance. These additional reforms are scheduled to take effect on May 1, 2026.

In the meantime, taxpayers are encouraged to make the necessary adjustments and preparations to align their systems with the new tax audit standards. Among other things, taxpayers should already begin reviewing their documentation protocols, validating data consistency across various tax reports and filings, and updating internal controls in line with these new regulations.

This year could mark a significant transformation in the Philippine tax landscape, as these promised changes may take shape as the long-overdue reforms in our tax system.

Ronald Bernas is a Legal Partner at Deloitte Philippines, a member firm of the Deloitte network. Joshua Tan is a Legal Assistant Manager of Deloitte Philippines.