The path to clarity: BIR’s new audit framework

The first quarter of 2026 has been anything but quiet for taxpayers. Along with the preparations for filing income tax returns, the Bureau of Internal Revenue’s (BIR) has rolled out guidance to update the tax investigation process. Shortly after lifting the tax audit suspension via Revenue Memorandum Circular (RMC) No. 8-2026, the BIR released Revenue Memorandum Order (RMO) No. 1- 2026, introducing major changes such as the single-instance audit framework.

Although the RMO attempted to simplify the process with the new guidelines, the new rules left many things uncertain particularly with regard to how the pending electronic Letters of Authority (eLAs) will be consolidated, how replacement eLAs will be issued, and what these replacement eLAs cover.

To help address these concerns, the BIR has followed up with RMO No. 6-2026 and RMC 14-2026. While these have provided clarifications, some uncertainties remain.

CONSOLIDATION OF PENDING ELAS
One of the most pressing questions raised by taxpayers with multiple ongoing audits was how eLAs at various procedural stages will be consolidated in accordance with the single-instance audit rule.

RMO No. 6-2026 now provides additional guidelines on the consolidation process. In particular, it prohibits consolidation in cases that have reached the Final Decision on Disputed Assessment (FDDA) stage and in cases where the Final Assessment Notice (FAN) has become final and executory. These cases must proceed independently to prevent undue delay in the resolution of such cases.

To clarify, not all cases with a FAN are barred from consolidation. Consolidation may be allowed if ALL the conditions below are met:

a. The FAN was validly issued and properly served;

b. The 30-day protest period is still running, or a valid protest has been timely filed;

c. The assessment is not yet final and executory;

d. All mandatory safeguards under RMO No. 6-2026 are complied with; and

e. Where a protest has already been filed, the Consolidated FAN is issued before the lapse of the 180-day period for the BIR to decide on the protest in accordance with Section 228 of the Tax Code.

The specific rules on consolidation are summarized as follows.

CONSOLIDATION PRIOR TO FAN STAGE
• No NOD + No NOD = Consolidate at NOD

• No NOD or NOD / NOD + NOD = Consolidate at NOD

• No NOD + Preliminary Assessment Notice (PAN) = Lower-stage case must first undergo NOD before elevating to PAN

• NOD + PAN / PAN + PAN = Consolidate at PAN with conformity and safeguards

CONSOLIDATION AT FAN STAGE
• No NOD + FAN / NOD + FAN = No consolidation allowed

• PAN + FAN = Possible consolidation at FAN only after lower-stage case completes its process

• FAN + FAN = May be consolidated if neither FAN is final and executory

It can be noted from the rules above that the “No Regression Rule” is observed. This prevents an audit case from moving backward in the tax assessment timeline, ensuring that the taxpayer’s progress through the stages of due process remains intact.

AUTHORITY TO ISSUE A REPLACEMENT ELA
RMO No. 1-2026 authorizes the Revenue District Officers (RDOs), Office Audit Section, or Large Taxpayers Audit Office to issue replacement eLAs when cases are reassigned. RMC No. 14 -2026 clarified that the issuance of a Replacement eLA due to the reassignment does not constitute a new audit authority requiring separate approval from the Commissioner of Internal Revenue (CIR). Instead, as per RMO No. 1-2026, it is merely an administrative adjustment rather than a new authorization to maintain continuity of an existing audit.

Despite the clarification, ambiguity remains as to whether an RDO may validly sign and issue the replacement eLA.

Interestingly, the Supreme Court (SC) decision cited by the RMC held that an internal document signed by the RDO or a subordinate official cannot be considered an equivalent of the eLA. It is only the CIR or his duly authorized representative who may issue an eLA under Sections 6, 10(c) and 13 of the Tax Code.

Applying the SC’s ruling, the officer signing the replacement eLA for purposes of consolidation must have an existing and valid delegation of authority from the CIR to issue or sign the eLA. Without a Revenue Delegation Authority Order (RDAO), the replacement eLA issued by the said officer could potentially be challenged for lack of authority.

SCOPE OF THE REPLACEMENT ELA
With the impending closure of the VATAS and LTVAU, taxpayers pose another question: can the scope of a replacement eLA be expanded to include additional tax types?

While RMC No. 14-2026 and RMO No. 6-2026 do not explicitly address the matter, Q&A Nos. 1 and 5 of RMC 14-2026 provide useful guidance. Q&A No. 1 emphasizes that a replacement eLA will be issued only if there is a reassignment of revenue officers or organization restructuring. Meanwhile, Q&A No. 5 states that the replacement eLA cannot be expanded to include additional taxable periods. If additional taxable periods are to be examined, such coverage must undergo the system-assisted taxpayer selection and centralized approval process under RMO No. 1-2026.

By analogy, the inclusion of additional tax types to the subsisting eLA, then the issuance of a replacement eLA should likewise be prohibited. As such, an express clarification from the BIR regarding the scope of the replacement eLA would be helpful to clarify this concern.

While RMO No. 6-2026 and RMC No. 14-2026 address many of the ambiguities left by the new audit framework, some questions such as the above understandably remain from the taxpayer’s perspective.

As the BIR pushes forward with its drive to modernize and streamline the audit process, its efforts to refine procedures signal a genuine commitment to improving taxpayer experience. The BIR’s next wave of guidance will determine whether this evolving framework can fully deliver on its promise of fairness and consistency in tax administration.

The views or opinions expressed in this article are solely those of the author and do not necessarily represent those of Isla Lipana & Co. The content is for general information purposes only and should not be used as a substitute for specific advice.

Jannelle B. Roxas is an assistant manager at the Tax Services department of Isla Lipana & Co., the Philippine member firm of the PwC network.

jannelle.b.roxas@pwc.com