BIR Letter of Authority Audit Defense in the Philippines: Know Your Rights
Received a BIR Letter of Authority? Learn how a BIR audit works, what records you must keep, and how to respond when revenue officers examine your books.
A Letter of Authority (LOA) is the document that authorizes a BIR revenue officer to examine your books and records. Without a valid LOA, an audit is unauthorized, and you may question it. Once a valid LOA is served, the audit proceeds under the rules on examination and inspection of books of accounts: records must be preserved intact at your place of business and produced on demand. Your defense rests on three things — verifying the LOA's validity, keeping complete records for the required retention period, and responding within the rules rather than ignoring the audit.
What a Letter of Authority Authorizes
A BIR audit begins with a Letter of Authority naming the taxpayer and the revenue officer authorized to conduct the examination. The examination covers the taxpayer's books of accounts, subsidiary books, and other accounting records.
Under Revenue Regulations No. 7-2024, implementing the Ease of Paying Taxes Act, the term "other accounting records" includes the corresponding invoices, receipts, vouchers, and returns, and other source documents supporting the entries in the books of accounts. These records must be preserved intact, unaltered, and unmutilated, and kept at the taxpayer's place of business, subject to inspection by any internal revenue officer.
If the LOA is defective — for instance, it does not properly identify the taxpayer or the officer — the audit may be challenged. An audit conducted without the required authority is a legitimate ground to question the examination.
How Long You Must Keep Records
The retention period is central to audit defense, because missing records are often treated as unreported income or disallowed deductions.
Under Section 4 of RR No. 7-2024, all books of accounts, including subsidiary books and other accounting records, must be preserved for five (5) years reckoned from the day following the deadline for filing the return, or, if filed after the deadline, from the date of actual filing.
The rules distinguish between manual and computerized records:
- Manual books of accounts and other accounting records — kept in hard copies for five years.
- Computerized books of accounts and other accounting records — maintained in electronic copies and hard copies.
If the taxpayer has a pending protest or claim for tax credit or refund, and the books and records are material to the case, the records must be preserved until the case is finally resolved.
When the BIR May Examine Your Books
Not every BIR visit is a full audit. Under Section 4 of RR No. 7-2024, books of accounts and other accounting records may be examined and inspected for purposes of audit, for a request for exchange of information by a foreign tax authority, and in the exercise of the Commissioner's power to obtain information, among others.
For income tax purposes, the examination and inspection shall be made only once in a taxable year, except in the following cases:
- Fraud, irregularity, or mistakes, as determined by the Commissioner;
- The taxpayer requests reinvestigation;
- Verification of compliance with withholding tax laws and regulations;
- Verification of capital gains tax liabilities; and
- In the exercise of the Commissioner's power under the Tax Code to obtain information from other persons.
This once-a-year rule is a practical shield. If a second examination is attempted within the same taxable year without falling under any exception, the taxpayer may raise this as an objection.
Where the Examination Must Take Place
Examination and inspection of books of accounts and other accounting records shall be done in the taxpayer's office or place of business or in the office of the BIR.
This matters for defense because it limits how the audit is conducted. Records must be preserved intact and kept at all times in the place of business of the taxpayer, subject to inspection by any internal revenue officer, and upon demand, the same must be immediately produced and submitted for inspection.
Invoicing and Record-Keeping as Audit Defense
A large share of BIR audit findings arise from defective invoices. Under Section 3 of RR No. 7-2024, a VAT-registered person must issue a duly registered VAT Invoice for every sale, barter, exchange, or lease of goods or properties, and for every sale, barter, or exchange of services, regardless of the amount of the transaction.
The VAT Invoice must state that the seller is a VAT-registered person, followed by the seller's Taxpayer Identification Number (TIN) and Branch Code. It must show the total amount the purchaser pays or is obligated to pay, with the indication that the amount includes VAT, and the VAT amount shown as a separate item.
Where a sale involves a mix of taxable, exempt, and zero-rated components, the invoice must clearly indicate the breakdown of the sale price and the calculation of the VAT on each portion. The terms "VAT-Exempt Sale" or "Zero-Rated Sale" must be written or printed as applicable.
For sales of One thousand pesos (P1,000) or more made to a VAT-registered person, the invoice must show the registered name or name, address, and TIN of the purchaser, customer, or client.
Under Section 6 of RR No. 7-2024, all persons subject to internal revenue tax shall, at the point of each sale and transfer of merchandise or for services rendered valued at Five hundred pesos (P500.00) or more, issue duly registered invoices showing the name, TIN, date of transaction, quantity, unit cost, and description of merchandise or nature of service. The P500.00 amount is adjusted to present values every three years using the consumer price index.
Critically, Supplementary Documents are not valid proof to support the claim of input taxes by buyers or purchasers of goods or services. A taxpayer who relies on supplementary documents alone to substantiate input VAT faces disallowance.
Frequently asked questions
What should I do when I receive a BIR Letter of Authority? Verify that the LOA is valid and properly identifies the taxpayer and the authorized revenue officer. Then prepare your books and records, since they must be preserved intact and produced on demand. Consult a tax lawyer before submitting anything.
Can the BIR audit me more than once in the same year? For income tax purposes, examination and inspection shall be made only once in a taxable year, except in cases of fraud, irregularity, or mistakes as determined by the Commissioner, reinvestigation at the taxpayer's request, verification of withholding tax compliance, verification of capital gains tax liabilities, and the exercise of the Commissioner's power to obtain information from other persons under the Tax Code.
How long must I keep my BIR records? Five years, reckoned from the day following the deadline for filing the return, or from the date of actual filing if filed late. If there is a pending protest or claim for tax credit or refund, keep the records until the case is finally resolved.
Practical takeaways
- A valid Letter of Authority is the foundation of any BIR audit; verify it before cooperating.
- Preserve books of accounts and other accounting records for five years from the day following the filing deadline, or from actual filing if late.
- For income tax purposes, examination is generally limited to once per taxable year, subject to specific exceptions.
- Issue duly registered VAT Invoices with the required information; supplementary documents cannot support an input tax claim.
- Examination is conducted at the taxpayer's office or place of business, or at the BIR, and records must be produced on demand.
Primary sources
The rules discussed above are drawn from the following issuances, embedded here in full for your reference.
RR No. 16-2005 — Prescribes the Consolidated Value-Added Tax Regulations of 2005 superseding RR No. 14-2005 (Published in Manila Times on Oct. 21, 2005) Digest | Full TextOpen in Law LibraryDownload PDF
3rd Sectoral Risk Assessment for Banks and Other BSP-Supervised Financial InstitutionsOpen in Law LibraryDownload PDF
RR No. 7-2024 — Implements Section 113, 235, 236, 237, 238, 242, 243 of the Tax Code of 1997, as amended by RA No. 11976 (Ease of Paying Taxes Act), on the registration procedures and invoicing requirements (Date Posted: April 12, 2024)Open in Law LibraryDownload PDF
This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.
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