If you're a business owner, self-employed professional, or corporation in the Philippines who filed (or is about to file) your Annual Income Tax Return and now faces the separate requirement to submit your Audited Financial Statements along with other attachments, the Bureau of Internal Revenue's Electronic Audited Financial Statements (eAFS) system is the mandatory online channel for doing so. Many taxpayers feel overwhelmed by the technical requirements, strict file-naming rules, and tight timelines that follow the ITR deadline. This guide gives you clear, practical steps based on how the system actually works in practice, what documents belong in each upload, and how to avoid the most common problems that delay or invalidate submissions.

The eAFS is BIR’s web-based platform that lets you electronically submit the attachments to your filed Annual Income Tax Return (AITR) — primarily the Audited Financial Statements (AFS) and other supporting documents — in PDF format. It replaced manual stamping and physical submission for most taxpayers. Once you successfully upload and the system accepts your files, it issues a Transaction Reference Number (TRN) and confirmation receipt sent to your registered email. This TRN serves as your official proof of submission to the BIR.

What the eAFS Submission Covers

You do not file the ITR itself through eAFS. You file the ITR first through the appropriate channel (eBIRForms, eFPS, or Tax Software Provider). Then, within the allowed window, you upload the required attachments through eAFS. The three main groups of documents are:

A copy of the filed Income Tax Return
The complete Audited Financial Statements package
All other required supporting attachments (withholding certificates, schedules, etc.)

The system groups these into categories with very specific file names. Incorrect naming is one of the top reasons uploads fail.

Who Must Submit Through eAFS

You generally need to submit audited financial statements and use eAFS if your gross sales, receipts, earnings, or output for the taxable year exceeded ₱3 million. This threshold applies to most self-employed individuals, professionals, and sole proprietors using itemized deductions on BIR Form 1701. Corporations almost always fall under this requirement regardless of size because they must maintain audited financial statements for both tax and Securities and Exchange Commission (SEC) purposes.

Taxpayers below the ₱3 million threshold who qualify for the Optional Standard Deduction or the 8% tax rate on gross receipts usually do not need audited statements and therefore do not use eAFS for AFS submission. Micro and small taxpayers who electronically filed simplified returns may have reduced attachment requirements, but you should still verify with your Revenue District Office (RDO) or accountant if any attachments are needed.

Foreigners, non-resident aliens engaged in trade or business in the Philippines, and foreign corporations with Philippine-source income follow the same rules when they are required to file an AITR and meet the gross receipts threshold. The CPA who audits the statements must be a Philippine-licensed practitioner accredited by the BIR.

Legal Basis

The obligation to file an Annual Income Tax Return and submit attachments comes from the National Internal Revenue Code of 1997, as amended, particularly the provisions on returns, books of accounts, and record-keeping. Specific rules on when financial statements must be audited by an independent CPA and the procedures for electronic submission of attachments are detailed in various Revenue Regulations and Revenue Memorandum Circulars issued by the BIR.

Key recent issuances include Revenue Memorandum Circular No. 20-2026 (guidelines for Calendar Year 2025 AITR filing and attachment submission) and Revenue Memorandum Circular No. 46-2026 (which addressed technical issues during the 2025 filing season by granting a limited extension and allowing contingency email submissions in certain cases). Earlier foundational circulars such as RMC No. 49-2020 and RMC No. 82-2020 established the eAFS system and the three-file grouping approach. These circulars mandate electronic submission through eAFS for attachments to electronically filed AITRs and specify that the system-generated TRN or confirmation receipt serves as proof of compliance.

Step-by-Step Guide to Filing in the BIR eAFS System

File your Annual Income Tax Return first. Complete and submit your AITR through the correct electronic channel and pay any tax due. Note your Filing Reference Number (FRN) or Tax Return Receipt Confirmation (TRRC) — you may need these details later.
Engage a BIR-accredited CPA if required. If your gross receipts exceeded ₱3 million, your financial statements must be audited by an independent CPA who is accredited by the BIR. The CPA will issue the auditor’s report or certificate that forms part of the AFS package.
Register or log in to the eAFS portal. Go to the official site at https://eafs.bir.gov.ph/eafs/. If this is your first time, click “Not Registered?” and complete the enrollment form. Provide your 9-digit TIN, complete name (Last Name, First Name, Middle Name for individuals; exact SEC-registered name for corporations), RDO code, registered email address, and other required details. If you do not have an authorized tax agent or representative, enter the same information in those fields. Submit the form, read and accept the Statement of Undertaking, then check your email (including spam) for the activation link. Click the link within 72 hours to activate your account. If you miss the window, you must repeat registration.
Prepare your PDF files with exact naming conventions. Scan or export everything as clear, complete PDFs. The system is strict about file names and will reject uploads that do not match. Use the following structure (replace XXXXXXXXX with your 9-digit TIN and YYYY with the taxable year, e.g., 2025):
- Income Tax Return file: EAFSXXXXXXXXXITRYYYY.pdf
- Audited Financial Statements file: EAFSXXXXXXXXXAFSYYYY.pdf
- Other attachments (split if needed): EAFSXXXXXXXXXOTHYYYY-01.pdf, EAFSXXXXXXXXXOTHYYYY-02.pdf, etc.
For fiscal-year taxpayers, some circulars require additional indicators such as TYMM in the name — check the latest BIR advisory for your specific period.
Merge documents correctly within each file. The AFS PDF should be one single merged file containing the complete set: the Certificate of Independent CPA (if applicable), the full financial statements (balance sheet, income statement, cash flows, changes in equity, notes), and the signed Statement of Management’s Responsibility. Other attachments can be grouped or split into numbered OTH files as needed. Keep file sizes reasonable — oversized files are often rejected.
Log in and upload. Enter your username and password. Look for the upload or “Submit New” option. Select the correct taxable year and upload your properly named PDF files into the appropriate categories. The system will validate names and formats.
Review, accept the undertaking, and submit. Double-check every file before final submission. Once you click submit, read and accept the Statement of Undertaking. The system will process the upload and display a success message with your Transaction Reference Number (TRN). You will also receive an email confirmation containing the TRN and details of what was uploaded.
Save and print your proof. Immediately save and print the confirmation page and the email. The TRN is your official proof that you submitted the attachments to the BIR. For corporations that also file AFS with the SEC through eFAST, attach or reference this TRN as proof of BIR submission.

Required Documents and What Belongs in Each File

ITR File
A clear PDF copy of your filed Annual Income Tax Return (the form itself and any basic schedules filed with it).

AFS File (one merged PDF)

Certificate or report from a BIR-accredited independent CPA (required when gross receipts exceed ₱3 million)
Complete financial statements (Statement of Financial Position, Statement of Comprehensive Income, Statement of Cash Flows, Statement of Changes in Equity)
Notes to the Financial Statements
Signed Statement of Management’s Responsibility for the financial statements and the annual income tax return

Other Attachments (one or more numbered OTH files)

BIR Form 2307 (Certificate of Creditable Tax Withheld at Source)
Summary of Withholding Taxes (SAWT) if claiming credits
BIR Form 2316 or other certificates related to compensation income
Any other schedules or documents the BIR requires for your specific industry, deductions, or tax incentives
Proof of ITR filing (FRN or TRRC) when required by the applicable RMC

Keep the original physical or digital source documents in your records. The BIR may request them during an audit or verification.

Deadlines and Timelines

Attachments must generally be submitted through eAFS within 15 days from the deadline for filing the AITR or within 15 days from the actual date of filing if you filed late. For Calendar Year 2025 returns, the BIR issued RMC No. 46-2026 granting a limited extension to May 25, 2026 for taxpayers who experienced system-related issues, and allowed contingency email submission to the concerned RDO or Large Taxpayers Office in specific cases. Always check the latest RMC or BIR advisory for the year you are filing because deadlines and contingency rules can be adjusted during peak seasons.

Common Pitfalls and How to Avoid Them

Many taxpayers encounter problems because they prepare files at the last minute. Blurry or incomplete scans, missing pages in the merged AFS PDF, and incorrect file names are the most frequent causes of rejection. Another common issue is failing to activate the eAFS account within 72 hours or discovering that the activation email landed in spam.

During peak filing months (April and May), the portal can slow down or experience temporary glitches. The BIR has responded in the past by issuing extensions or allowing email submissions when the system is officially unavailable — always wait for an official advisory before using alternatives.

For taxpayers abroad or OFWs managing Philippine businesses remotely, coordinate early with your local CPA and accountant. You can complete the eAFS upload from anywhere with stable internet, but the underlying financial statements and CPA audit must still comply with Philippine standards.

Frequently Asked Questions

Do I need a BIR-accredited CPA even if my gross sales are just slightly over ₱3 million?
Yes. The threshold triggers the requirement for an independent audit by a BIR-accredited CPA. The certificate from that CPA becomes part of your AFS upload.

Can my accountant or external tax agent submit the eAFS files on my behalf?
You can authorize a representative during registration or use their details in the authorized tax agent fields. However, you remain responsible for the accuracy and timeliness of the submission. Many businesses give their accountant access or have them prepare the PDFs for the taxpayer to upload.

What if I already submitted some documents via email during a system outage?
Under RMC No. 46-2026 and similar past circulars, taxpayers who received an official email acknowledgment from their RDO or concerned office by the original deadline are generally considered compliant. You may still upload the same files through eAFS later if you wish, but it is not always required.

Is the TRN enough proof for my SEC filing?
Yes. Corporations that file AFS with the SEC through eFAST can use the BIR eAFS Transaction Reference Number or confirmation receipt in place of a manually stamped “Received” copy.

What happens if I miss the eAFS deadline?
Late submission can result in penalties, surcharges, and interest under the National Internal Revenue Code. It may also increase the likelihood of a BIR audit or disallowance of certain deductions. File as soon as possible and keep records of any system issues you encountered.

Do I still need to keep paper copies after uploading everything?
Yes. The BIR requires taxpayers to retain original books, records, and supporting documents for the period prescribed under the NIRC (generally at least three years, longer in some cases). The electronic submission does not replace your record-keeping obligation.

Can I upload the files in any order or do I have to do all three at once?
You should prepare and upload all required files for the taxable year in one submission session when possible. The system processes them together and issues one TRN for the complete set.

How do I know if I have the correct RDO code for registration?
Your RDO code appears on your BIR Certificate of Registration (Form 2303) or previous tax filings. Using the wrong code can cause registration or processing problems.

Key Takeaways

File your Annual Income Tax Return first, then submit attachments through eAFS within the 15-day window (or any extended deadline announced by the BIR).
Prepare three main PDF files with exact naming conventions: one for the ITR, one merged AFS package, and one or more for other attachments.
The AFS PDF must include the BIR-accredited CPA’s certificate (when gross receipts exceed ₱3 million), complete financial statements, notes, and the signed Statement of Management’s Responsibility.
Register and activate your eAFS account early; the activation link expires after 72 hours.
Save and print the Transaction Reference Number and email confirmation immediately — this is your official proof of submission.
Keep original records for the required retention period even after successful electronic submission.
Monitor the official BIR website and your RDO for any year-specific advisories, extensions, or contingency procedures, especially during peak filing season.

Following these steps carefully helps ensure your submission is accepted on the first try and keeps your tax compliance record clean. Many taxpayers successfully complete the process every year once they understand the file preparation and naming requirements. Start preparing your PDFs well before the deadline so you have time to correct any issues.