What Is a TIN?
A plain-language explanation of the Philippine Tax Identification Number and why it matters.
Definition
A Tax Identification Number (TIN) is a unique nine-digit number assigned by the Bureau of Internal Revenue (BIR) to every registered taxpayer in the Philippines — individuals, businesses, estates, and trusts.
Think of it as your personal ID number with the BIR. Every time you pay taxes, file a return, or transact with a government agency that requires proof of tax registration, you will need your TIN.
Format
A standard individual TIN looks like this:
123-456-789
9 digits, usually written with hyphens
Some TINs have additional branch codes (three or four digits) appended for business use, but the core TIN is always nine digits.
Who Needs a TIN?
Under the National Internal Revenue Code (NIRC), the following are required to register:
- Employees — registered upon first employment
- Self-employed individuals and professionals (freelancers, doctors, lawyers, etc.)
- Business owners, sole proprietors, and partnerships
- Corporations and other juridical entities
- Estates and trusts with income
- Non-resident aliens with Philippine-sourced income
What Is It Used For?
Your TIN is required in many everyday situations, including:
Important Rules
Your TIN is permanent — it does not expire and does not change even if you move, change jobs, or transfer your RDO.