BIR Form 1901: Application for Registration / TIN for Self-Employed

Last Updated: June 13, 2026

Written and reviewed by the TaxCalculator.ph Editorial Team, led by Aditya Aman, Founder

Complete guide to BIR Form 1901 for TIN application by self-employed individuals. Learn filing requirements, deadlines, line-by-line instructions, and common errors.

Quick Answer

BIR Form 1901 is the Application for Registration of self-employed individuals, professionals, estates, and trusts. It is filed with the Revenue District Office on or before the start of business or practice to secure a TIN and Certificate of Registration (Form 2303).

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Download BIR Form 1901 from bir.gov.ph. We link to the official BIR website and never host BIR PDFs, so you always get the latest revision.

Form Overview

PurposeTIN registration for self-employed individuals and professionals
Who FilesSelf-Employed Individuals, Professionals, Sole Proprietors, New Taxpayers
DeadlineWithin 30 days from start of business operations or upon becoming liable to tax
Filing ChannelIn-person at BIR Revenue District Office or eBIR Forms (online)

For the authoritative form, deadlines, and latest revisions, refer to the official BIR website.

BIR Form 1901 is the official application form used by self-employed individuals and professionals to register with the Bureau of Internal Revenue (BIR) and obtain a Taxpayer Identification Number (TIN). A TIN is a unique nine-digit identifier required for all tax-related transactions, including filing income tax returns, claiming refunds, and conducting business with government agencies. This guide provides comprehensive instructions on completing Form 1901, understanding filing requirements, and avoiding common mistakes.

Purpose & Legal Basis

BIR Form 1901 serves as the primary registration document for self-employed individuals seeking to obtain a TIN. The form is mandated under the National Internal Revenue Code (NIRC) of 1997, as amended, specifically Section 236 (Registration Requirements) and Section 275 (Penalties for Failure to Register). Revenue Memorandum Order (RMO) No. 1-2023 and subsequent issuances provide detailed guidelines on TIN registration procedures and requirements. The BIR requires all individuals engaged in trade, business, or profession to register and obtain a TIN within thirty (30) days from the start of their business operations or upon becoming liable to tax.

Who Must File

BIR Form 1901 must be filed by:

Note: Corporations, partnerships, and other juridical entities use different registration forms (BIR Form 1902 for corporations, BIR Form 1903 for partnerships).

When to File

According to NIRC Section 236, self-employed individuals must register and obtain a TIN within thirty (30) days from the start of their business operations or upon becoming liable to tax, whichever is earlier. Late registration may result in penalties. The BIR recommends filing as soon as possible to avoid compliance issues. Registration can be done at any BIR office nationwide, with processing typically completed within one (1) business day for complete applications.

Line-by-Line Instructions

Header Section:

Part I: Personal Information

Part II: Identification Documents

Part III: Business / Professional Information

Part IV: Contact Information

Part V: Income Information (Optional but Recommended)

Part VI: Declaration & Signature

Common Filing Errors

1. Incomplete or Illegible Information: Ensure all required fields are completed in clear, legible handwriting or typed text. Incomplete applications are returned for correction, delaying TIN issuance.

2. Mismatched Names: Your name on Form 1901 must exactly match your government-issued ID. Discrepancies cause processing delays. If your legal name differs from your ID, bring a court order or legal document proving the name change.

3. Invalid or Expired ID: Present a valid government-issued ID. Expired IDs are not accepted. Ensure your ID is current at the time of application.

4. Vague Business Description: Avoid generic descriptions like "Business" or "Services." Specify your exact business activity (e.g., "Freelance Web Development," "Dental Practice," "Import-Export Trading"). Vague descriptions may result in incorrect tax classification.

5. Incorrect Business Start Date: Enter the actual date you began operations, not the date you are applying for the TIN. The BIR uses this date to determine your tax liability period.

6. Missing Contact Information: Provide a valid mobile number and email address. The BIR uses these to send your TIN and important tax notices.

7. Inconsistent Addresses: Ensure your business and residential addresses are clearly stated. If they are the same, explicitly write "Same as Above" rather than leaving it blank.

8. Unsigned Form: The form must be signed in blue or black ink. Unsigned or photocopied signatures are not accepted.

Required Attachments

When submitting BIR Form 1901, bring the following documents:

How to File

In-Person Filing at BIR Office:

Online Filing (eBIR Forms):

Processing Time: Standard processing is one (1) business day for complete applications submitted in person. Online applications may take 2-3 business days pending verification.

Penalties for Late Filing

Under NIRC Section 275, failure to register and obtain a TIN within the required thirty (30) days incurs penalties:

To avoid penalties, register immediately upon starting your business or becoming liable to tax. If you have not yet registered, file Form 1901 without delay and settle any back taxes owed.

After Registration: Your TIN and Next Steps

Once your Form 1901 is approved, you will receive:

With your TIN, you are now required to:

Frequently Asked Questions

Q: Can I apply for a TIN online without visiting a BIR office?
A: Yes, you can initiate your application through the eBIR Forms portal online. However, you will likely need to visit a BIR office for final verification and ID presentation before your TIN is officially issued. The BIR will notify you of the next steps after your online submission.

Q: How long is a TIN valid?
A: A TIN is valid for life. Once issued, it remains your permanent tax identifier. You do not need to renew it unless it is cancelled due to non-compliance or you request cancellation.

Q: What if I lost my TIN Certificate?
A: You can request a duplicate TIN Certificate from the BIR by submitting a written request to your assigned Revenue District Office. Bring a valid ID and proof of your previous registration. A replacement certificate is typically issued within 1-2 business days.

Q: Do I need a TIN if I am not yet earning income?
A: If you are planning to start a business or profession, it is advisable to register and obtain a TIN before you begin earning income. This ensures you are compliant from day one. If you have not yet started earning but plan to, you can still apply for a TIN.

Q: Can someone else submit my Form 1901 on my behalf?
A: Generally, you should submit the form in person to ensure accuracy and to present your original ID for verification. However, if you are unable to do so, an authorized representative (such as a family member or accountant) may submit the form on your behalf, provided they bring a notarized Special Power of Attorney (SPA) and a photocopy of your ID.

Q: What is the difference between a TIN and a business permit?
A: A TIN is a tax identification number issued by the BIR for tax purposes. A business permit is a local government license issued by your city or municipality to authorize you to operate a business. Both are required; they serve different purposes. The TIN is for tax compliance, while the business permit is for local regulatory compliance.

Q: If I have multiple businesses, do I need multiple TINs?
A: No. You are issued one TIN for life, regardless of how many businesses or professions you operate. All your business income is reported under the same TIN. However, if you operate as a separate legal entity (corporation or partnership), that entity will have its own TIN.

Q: What happens if I provide false information on Form 1901?
A: Providing false or misleading information on a tax form is a criminal offense under NIRC Section 269. Penalties include fines up to P100,000 and/or imprisonment up to five (5) years. Always ensure all information is accurate and truthful.

Line-by-Line Instructions

  1. Header Section - Application Type

    Check 'New Registration' if applying for TIN for the first time, or 'Re-registration' if your previous TIN was cancelled. Example: New Registration

  2. Part I - Personal Information (Last Name, First Name, Middle Name)

    Enter your legal name exactly as it appears on your birth certificate or government-issued ID. Do not use nicknames. Example: Santos, Juan, Dela Cruz

  3. Part I - Date of Birth

    Enter in MM/DD/YYYY format. Must match your official identification. Example: 01/15/1985

  4. Part II - Primary ID Type and Number

    Specify your government-issued ID (Passport, Driver's License, PRC License, SSS ID, etc.) and enter the complete ID number. Example: Driver's License, N01-12-345678

  5. Part III - Nature of Business / Profession

    Describe your primary business activity in detail. Be specific, not vague. Example: Freelance Graphic Designer, Medical Consultant, Construction Contractor

  6. Part III - Business Name

    If you operate under a trade name different from your personal name, enter it here. Otherwise, write 'N/A'. Example: JD Consulting Services

  7. Part III - Date Business Started

    Enter the actual date you began operations in MM/DD/YYYY format. This determines your tax liability start date. Example: 06/01/2025

  8. Part III - Business Address

    Provide the complete address where you conduct business, including street, barangay, city/municipality, province, and postal code. Example: 123 Main Street, Barangay Poblacion, Manila, Metro Manila 1000

  9. Part IV - Contact Information (Mobile and Email)

    Provide a valid mobile number and email address. The BIR uses these for TIN issuance and tax notices. Example: 09171234567, juan.santos@email.com

  10. Part V - Estimated Annual Gross Income

    Provide a reasonable estimate of your expected annual gross income. This helps the BIR classify you for tax purposes. Example: P500,000

  11. Part VI - Signature and Date

    Sign the form in blue or black ink with your handwritten signature (must match your ID signature). Enter the application date. Do not print your name.

Required Attachments

How to File

In-person at BIR Revenue District Office (RDO)
eBIR Forms (online portal at www.ebir.bir.gov.ph)
Authorized BIR Extension Office

Frequently Asked Questions

Can I apply for a TIN online without visiting a BIR office?expand_more

Yes, you can initiate your application through the eBIR Forms portal. However, you will likely need to visit a BIR office for final verification and ID presentation before your TIN is officially issued.

How long is a TIN valid?expand_more

A TIN is valid for life. Once issued, it remains your permanent tax identifier. You do not need to renew it unless it is cancelled due to non-compliance.

What if I lost my TIN Certificate?expand_more

You can request a duplicate TIN Certificate from your assigned Revenue District Office by submitting a written request, bringing a valid ID, and proof of previous registration. A replacement is typically issued within 1-2 business days.

Do I need a TIN if I am not yet earning income?expand_more

If you are planning to start a business or profession, it is advisable to register and obtain a TIN before you begin earning income to ensure compliance from day one.

Can someone else submit my Form 1901 on my behalf?expand_more

Generally, you should submit in person. However, an authorized representative may submit on your behalf with a notarized Special Power of Attorney (SPA) and a photocopy of your ID.

If I have multiple businesses, do I need multiple TINs?expand_more

No. You are issued one TIN for life, regardless of how many businesses you operate. All business income is reported under the same TIN.

What are the penalties for late registration?expand_more

Failure to register within 30 days incurs a 25% penalty on tax due or P1,000 (whichever is greater), plus 5% surcharge per annum and 12% annual interest on unpaid taxes. Criminal penalties include fines up to P10,000 and/or imprisonment up to one year.

What is the difference between a TIN and a business permit?expand_more

A TIN is a tax identification number issued by the BIR for tax purposes. A business permit is a local government license issued by your city/municipality. Both are required; the TIN is for tax compliance, the permit is for local regulatory compliance.

Calculate before you file

Confirm your numbers with our BIR-compliant calculators before submitting 1901.

Sources & References (4)

Primary sources and the laws, regulations, and official issuances this page relies on. Each citation links directly to the issuing authority’s document.

  1. Bureau of Internal Revenue. BIR Form 1901 — Application for Registration for Self-Employed and Mixed Income Individuals, Estates and Trusts (official BIR forms page).” bir.gov.ph. Bureau of Internal Revenue, Application Forms — BIR Form No. 1901. Accessed .
  2. LawPhil Project (Arellano Law Foundation). NIRC Sec. 236 — Registration requirements.” lawphil.net. National Internal Revenue Code of 1997, as amended, Sec. 236. Accessed .
  3. Bureau of Internal Revenue. RMO No. 1-2023 — updated registration guidelines.” bir.gov.ph. Revenue Memorandum Order No. 1-2023, Bureau of Internal Revenue. Accessed .
  4. Bureau of Internal Revenue. Nirc Section 236 Registration.” bir.gov.ph. Accessed .

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