Best Practices on Managing BIR’s LOA and Audit Process: A Guide for Businesses

The issuance of Letter of Authority (LOA) and audit process is a crucial part of tax compliance for businesses in the Philippines. Properly managing the LOA process ensures compliance, minimizes disruptions, and helps businesses avoid penalties.

The Bureau of Internal Revenue (BIR) now issues LOAs electronically as eLAs, which authorize named revenue officers to audit a company’s financial records. Under RMO 22-2026, an audit without a valid eLA, Tax Verification Notice, or Mission Order is unauthorized.

This guide outlines best practices for handling an LOA efficiently, including preparation, documentation, communication, and legal considerations.

1. Understanding the BIR LOA Process and Stages

The audit process generally follows these key stages:

1. Issuance of the LOA – The BIR formally authorizes tax examiners to conduct an audit on the taxpayer’s financial records.
2. Presentation of LOA and Initial Audit – The taxpayer must acknowledge receipt of the LOA, after which the BIR examiners will review tax records.
3. Request for Documents and Submissions – The BIR serves the eLA with a Standard Checklist of Requirements. You have 10 calendar days to submit the documents. If you miss it, a First Notice and then a Second and Final Notice each give you 10 more calendar days.
4. Notice of Discrepancy (NOD) – If discrepancies are found, the BIR will issue an NOD detailing the findings. The taxpayer is given a chance to respond and provide explanations or additional documents to justify their tax position.
5. Preliminary Assessment Notice (PAN) – If the BIR is not satisfied with the taxpayer’s response to the NOD, they may issue a PAN, which is a formal notice indicating the BIR’s initial assessment of tax deficiencies.
6. Final Letter of Demand/Final Assessment Notice (FLD/FAN) – If the BIR rejects the taxpayer’s response to the PAN, they will issue the FLD/FAN, which is the final tax assessment. The taxpayer may either pay the assessed deficiency or protest the findings by requesting a reconsideration or reinvestigation, which is processed differently based on the protest type requested.

Understanding these stages of the BIR audit allows businesses to prepare adequately and respond appropriately at each step. That being said, it’s important to note the key timelines the BIR allows for responses (see standard response times in Step 5).

2. Review the LOA Scope and Requirements

Before you submit anything, confirm the notice cites a valid eLA, Tax Verification Notice, or Mission Order. Under RMO 22-2026, an audit without one is unauthorized.

To avoid compliance risks, businesses should carefully review:

• Your registered name and TIN
• Tax periods covered
• Types of taxes under review (e.g. income tax, VAT, withholding tax)
• Authorized revenue officers involved
• Whether another eLA covers the same taxable year

Why does this matter?

The assigned revenue officers must be those officially listed in the LOA. If unlisted officers participate in the audit, the business has the right to question their authority. Ensuring proper authorization helps avoid legal complications.

RMO 22-2026 also limits the BIR to one eLA per taxable year covering all applicable tax types, with exceptions.

If the BIR replaces your eLA, you should receive a letter notice that gives:

• The old eLA’s serial number and date
• A statement that the old eLA is cancelled

A replacement cannot widen the original scope.

Understanding these details ensures that businesses prepare the right documents and respond appropriately.

3. Prepare Tax Documents in Advance

Preparation is key to a smooth BIR audit process. Compile all relevant tax and financial records well before the deadline to prevent last-minute issues. Essential documents include:

• Tax returns and supporting schedules
• Financial statements and general ledgers
• Invoices, receipts, and contracts
• Payroll records and withholding tax certificates

Hard copies vs. digital copies?

Keep organized digital records. You then choose where the BIR examines them, using the Taxpayer Consent on Audit Venue form:

• Submit the records to the BIR office
• Have them examined at your principal place of business, after coordinating with the revenue officer

The BIR accepts photocopies certified as true copies. It can ask for originals only to verify matters within the audit scope. Once a Subpoena Duces Tecum is issued, you can no longer choose the venue.

4. Assign a Dedicated LOA Compliance Officer

To streamline the LOA audit process, designate a single point of contact (POC) within your organization. This person should be:

• Familiar with the company’s financial records
• Knowledgeable about tax laws and compliance
• Able to communicate effectively with BIR auditors

A dedicated compliance officer helps avoid miscommunication, ensures timely responses, and improves audit outcomes.

5. Maintain Professional and Transparent Communication

Interacting professionally with BIR auditors can significantly impact the audit’s progress. Follow these best practices:

• Clarify any unclear points in the LOA upfront
• Keep records of all discussions and document requests
• Respond to BIR inquiries within the given timeframe

Normal Timeframe for Responses

The standard response time varies depending on the stage of the audit and the type of notice issued by the BIR. Generally:

• Initial document requests – within 10 calendar days from service of the eLA and its checklist. Missing it brings a First Notice, then a Second and Final Notice, each with 10 more calendar days.
• Notice of Discrepancy (NOD) – taxpayer is initially given 5 days from receipt. If the taxpayer needs more time, the extension of the response shall be within 30 days from the receipt.
• Preliminary Assessment Notice (PAN) – response is due within 15 days from receipt. The FLD/FAN follows only after your response or after those 15 days lapse.
• Final Letter of Demand/Final Assessment Notice (FLD/FAN) – taxpayer has 30 days to either protest the assessment or pay the deficiency. There are two types of protests applicable here:
  • Request for Reconsideration – This is based on existing records. The taxpayer requests the BIR to reconsider its findings without introducing new evidence. It is typically based on a claim of misapplication of the law or computational errors.
  • Request for Reinvestigation – In this case, the taxpayer asks for a re-evaluation of the facts, providing additional evidence to support the protest. This requires a comprehensive re-audit, and the taxpayer must submit the new supporting documents within 60 days from the filing of the protest.

What If the Business Lacks an Accountant?

• If the business does not have an in-house accountant, it is best to engage an external tax consultant or a CPA firm immediately.
• The taxpayer should formally request an extension from the BIR (if necessary), citing the need for additional time to gather records.

What If Documents Are Missing?

• Identify which records are missing and provide alternative supporting documents if possible (e.g., bank statements, sales ledgers, supplier invoices).
• If documents were lost due to unforeseen circumstances (fire, flood, or theft), submit an affidavit of loss and coordinate with suppliers or banks for copies.
• Businesses should communicate proactively with the BIR, explaining the situation and proposing a timeline for submission.

Maintaining open communication with the BIR and documenting all interactions ensures smoother negotiations and reduces compliance risks.

6. Seek Legal and Tax Expert Assistance

Navigating a BIR tax audit can be complex. Hiring expert tax consultants or legal advisors can help with the following situations:

Reviewing the LOA for irregularities

A company receives an LOA that lists multiple revenue officers assigned to the audit. Upon review, the tax consultant identifies that some officers were not properly authorized or that the LOA was issued beyond the allowed period for assessment.

The consultant helps the company question the validity of the LOA, potentially nullifying the audit and avoiding unnecessary scrutiny.

Advising on proper responses and documentation

A business is issued a Notice of Discrepancy (NOD) claiming undeclared sales based on third-party reports.

The tax consultant assists in reconciling sales records with actual transactions, preparing the proper explanations, and submitting the necessary documents to dispute the claim before it escalates to a formal assessment.

Representing the company in case of disputes

After responding to the NOD, the BIR proceeds with a Preliminary Assessment Notice (PAN), rejecting the company’s explanation.

The tax consultant drafts a well-supported position paper backed by tax laws and financial evidence to challenge the assessment. If the dispute escalates to a Final Letter of Demand (FLD/FAN), they could guide the company in filing a protest with the BIR or appealing to the Court of Tax Appeals.

7. Track Deadlines and Compliance Timelines

LOAs include strict deadlines for submitting records and responding to BIR findings. Missing deadlines can lead to penalties or extended audits. To avoid unnecessary risks and stay on track:

• Use a calendar or audit tracking system
• Set reminders for key deadlines
• Ensure all responses are submitted on time
• Remember the escalation path: First Notice, Second and Final Notice, then a possible Subpoena Duces Tecum

The BIR also has its own report targets by case class. These are internal BIR deadlines, not yours. They pause for subpoena or exchange-of-information requests, and a late report does not void an assessment.

8. Address Issues Proactively

During the BIR audit, discrepancies may arise. Instead of waiting for findings, proactively address potential issues early and minimize your risks by:

• Reviewing records for inconsistencies
• Providing explanations and supporting documents when needed
• Working closely with tax consultants to resolve concerns

9. Keep Detailed Records of the LOA Process

Documentation is critical for tax compliance so businesses can defend their position in case of disputes or future audits. Maintain a comprehensive audit trail, including:

• Copies of submitted documents
• Meeting notes and discussions with BIR officers
• All correspondence related to the audit
• Signed minutes of the meeting on the Notice of Discrepancy (the BIR notes any refusal to sign)
• The Taxpayer Consent on Audit Venue form and any replacement eLA letter notice
• Every First Notice, Second and Final Notice, and Subpoena Duces Tecum

10. Conduct a Post-Audit Review

After the audit, businesses should assess and improve their compliance processes by:

• Identifying gaps in documentation or procedures
• Reviewing feedback from tax auditors
• Updating internal processes to prevent future issues
• Filing the Termination Letter the BIR issues for paid or no-findings cases

Final Thoughts: Navigating the LOA Process with Confidence

Effectively managing the Letter of Authority (LOA) process requires organization, preparation, and expert guidance. By following these best practices, businesses can ensure compliance, minimize risks, and streamline tax audits with the BIR.

If you’d rather have experts handle the complexities of the LOA process, CloudCFO is here to support you. Get in touch with us today so you can navigate BIR’s audit process without stress, letting you focus on growing your business.