Receiving a BIR Letter of Authority (LOA) can be stressful for business owners. It generally authorizes the BIR to examine your books of accounts and other financial records to verify whether your business has complied with its tax obligations.
However, not every BIR officer is automatically authorized to conduct a tax audit. The document must grant the proper authority, identify the taxpayer being examined, and specify the taxes and taxable periods covered.
Before submitting your accounting records, take time to review your LOA. Understanding its requirements can help you recognize potential issues and respond appropriately to a BIR audit.
Here are seven important things to know about the validity of a BIR Letter of Authority.
1. Check Whether You Have the Correct BIR Letter of Authority
An Electronic Letter of Authority (eLA) is generally used by the BIR to authorize a full examination of a taxpayer’s books of accounts and other accounting records.
Other BIR documents, such as a Mission Order, Tax Verification Notice, Letter Notice, or internal assignment memorandum, serve different purposes. They do not automatically provide the same authority as an eLA to conduct a full tax examination.
For example, a notice requesting information about a specific transaction does not necessarily authorize a broader examination of all your tax records.
What to check: Identify the document issued to your business and understand the examination it authorizes.
2. Verify Your Business Name and TIN in your BIR Letter of Authority
The LOA should correctly identify the taxpayer being examined. Check that your registered business name and Tax Identification Number (TIN) match your registration records.
This is particularly important for businesses with multiple branches, related companies, or different registered entities. An authority issued for one taxpayer should not automatically be treated as authority to examine another.
What to check: Confirm that the taxpayer identified in the LOA is the same entity whose records are being examined. If you find a discrepancy, seek clarification from the appropriate BIR office.
3. Check the Taxes and Taxable Periods Covered in your BIR Letter of Authority
An LOA should specify the types of taxes being examined and the corresponding taxable periods.
For example, the examination may cover income tax and other applicable internal revenue taxes for a particular taxable year. The audit should remain within the authority granted.
Under the BIR’s Single Instance Audit Framework, the general rule is to issue one eLA for a taxpayer for a given taxable year, covering the applicable internal revenue taxes, subject to specific exceptions.
What to check: Compare the taxes and periods stated in the LOA with the records and transactions being examined. If the audit appears to cover matters outside its stated scope, ask whether additional or amended authority is required.
4. Confirm That the Revenue Officers Are Authorized
The identity of the examining officers is another important part of the audit process. The assigned Revenue Officers and Group Supervisor should be identified in the eLA.
Compare the names on the document with the officers who request your records, examine your books, and conduct the audit.
An LOA is not a general authorization that any BIR officer can use to examine your business. The officers conducting the examination must be properly authorized.
What to check: If the people handling your audit are different from those named in the eLA, ask the BIR to clarify the situation and verify whether the necessary replacement or amended authority has been issued.
5. Verify Any Change in the Assigned Revenue Officer
Revenue officers may be transferred, reassigned, or replaced while an audit is ongoing. When this happens, the change must be properly documented.
Under the applicable 2026 rules, a Replacement eLA issued solely because of reassignment or organizational restructuring may continue the existing audit authority when the taxpayer, taxable period, and scope remain unchanged.
However, a change in personnel does not mean that the replacement officer can automatically take over without the required authority.
What to check: If another officer takes over your audit, request the relevant documentation and confirm that the officer is authorized to continue the examination.
6. Make Sure the Examination Stays Within Its Authorized Scope
Even a valid Letter of Authority does not give the BIR unlimited authority to examine every aspect of your business.
The examination must remain within the taxpayer, taxes, taxable periods, and scope covered by the applicable authority.
For instance, a limited verification under a Mission Order or Tax Verification Notice does not automatically authorize a full tax examination. The appropriate audit authority must be secured when required by the applicable rules.
What to check: Review the records being requested and the issues being examined. If the audit expands beyond its original scope, seek clarification before determining how to respond.
7. Verify the Authenticity of the BIR Letter of Authority
Before turning over your accounting records, verify whether the LOA is genuine.
The BIR provides an LOA verification facility through its Chatbot REVIE. Taxpayers can use details such as their TIN, taxpayer name, and LOA case number to check an issued LOA.
If the system returns an “LOA NOT FOUND” result, do not immediately conclude that the document is fake or invalid. Follow the BIR’s prescribed procedure for further verification.
What to check: Confirm the document’s authenticity and keep a copy of the LOA, along with relevant communications with the BIR, for your records.
Does the Old 30-Day Rule Still Apply?
Older articles and legal discussions may state that an LOA becomes invalid if it is not served within 30 days, unless it is revalidated.
However, the BIR subsequently removed the former 30-day service rule for electronic LOAs. Late service alone should therefore not automatically be treated as making an eLA invalid.
If you have concerns about the timing or validity of your BIR Letter of Authority, check the rules applicable to your specific audit rather than relying solely on older guidance.
What Should You Do When You Receive a BIR Letter of Authority?
Start by verifying the document and reviewing its details. Confirm that your business is correctly identified, the taxes and taxable periods are clear, and the officers conducting the examination have the necessary authority.
Keep copies of the documents you receive, maintain organized accounting records, and document your communications with the BIR. If you identify a possible issue, seek clarification and obtain professional advice before deciding on your next steps.
These measures can help you respond to the audit in an organized and informed manner.
Final Thoughts: Understand Your Audit Authority Before Addressing the Assessment
A Letter of Authority establishes the basis for a BIR examination by identifying the taxpayer, the authorized examining officers, and the taxes and periods covered.
Problems involving audit authority can have significant implications for the examination and any resulting tax assessment. However, not every error automatically invalidates a BIR Letter of Authority or cancels an assessment. The applicable rules and specific circumstances must be considered.
Business owners should therefore look beyond the amount of tax being questioned. Understanding the authority behind the audit is also an important part of protecting your rights as a taxpayer.
Need Assistance With a BIR Audit or Assessment?
A BIR audit can involve complex requirements, documentation, and deadlines. If your business has received a Letter of Authority or is facing a tax assessment, getting professional guidance can help you understand your obligations and determine the appropriate next steps.
DJKA Accounting Services can assist you in understanding your tax compliance requirements and reviewing your BIR audit concerns.
Email us at info@djkaaccounting.com to discuss your situation and explore how we can help your business navigate BIR audit and assessment matters with greater clarity and confidence.
