BIR Registration Requirements for New Businesses: TIN, COR, and Books of Accounts

Every new registrant is working toward the same three outcomes, in roughly this order: a confirmed Taxpayer Identification Number tied to the correct Revenue District Office, a Certificate of Registration that locks in your tax types, and stamped or approved books of accounts. Everything else in the process, the forms, the fees, the invoicing authority, supports one of those three.

Philippine law allows a person to hold only one TIN for life. If you already have one, whether from prior employment, a past business, or a professional license, you do not apply for a new number when you start a business. You update your existing registration instead.

Corporations, partnerships, and other juridical entities are different. They receive their own TIN, separate from the personal TIN of any incorporator, partner, or officer. Sole proprietorships do not get this separation: the business runs under the owner's personal TIN, since it has no legal identity apart from the owner.

The TIN is also tied to jurisdiction. You register at the Revenue District Office covering your business address, which is not always the same RDO as your residence. If your existing TIN sits under a different RDO, you will need to process a transfer before the new registration can move forward, a step that catches a lot of applicants off guard.

Sole proprietors and self-employed professionals file BIR Form 1901. Corporations, partnerships, and other non-individual entities file BIR Form 1903. Both capture your registered address, declared line of business, and the tax types you will be liable for, income tax, VAT or percentage tax, and withholding tax if you will have employees or pay for services subject to expanded withholding.

Sole proprietors typically attach a DTI Certificate of Business Name Registration, a government ID, and proof of the business address. Corporations and partnerships attach their SEC certificate, articles of incorporation or partnership, and, if a representative is filing on the entity's behalf, a board resolution or secretary's certificate authorizing that person.

Later changes, a new address, an added tax type, a switch between VAT and non-VAT, or a new branch, go through BIR Form 1905. It is the update mechanism for an existing registration, not a fresh application.

Once your application is approved, the BIR issues the Certificate of Registration, BIR Form 2303. It carries your registered name, TIN, business address, declared line of business, RDO, and, most importantly, the specific tax types you are obligated to file.

That last part matters more than most new owners expect. The tax types on the COR determine which returns you must submit going forward, including during periods with no income. A wrong tax type on this document tends to generate what the BIR calls an open case, a flagged non-filing, even when nothing was actually owed for that period. Review the COR line by line before you leave the RDO.

The COR needs to be displayed at your place of business. If you run an online or home-based operation without a public storefront, keep it on hand at your registered address in case the BIR asks to see it.

Every registered business keeps books of accounts, regardless of size or whether it turns a profit in its first year. There are three formats, and the right one depends on how your business is structured and what it can support administratively.

Timing is where new registrants most often slip. Books need to be registered before you start recording transactions, not months later once a bookkeeper gets involved. Unregistered or unstamped books can create problems during an audit even when the underlying numbers are accurate, because the issue at that point is the registration requirement itself, not the arithmetic.

A registered business cannot legally issue receipts or invoices the moment it opens. It needs either an Authority to Print, historically filed through BIR Form 1906, or approval to use a computerized accounting system, point-of-sale terminal, or electronic invoicing platform. Invoices issued without that authority expose the business to penalties, and the buyer on the other end may lose the ability to claim the expense as a deduction or, for VAT-registered buyers, as input tax.

Whether you register as VAT or non-VAT is one of the more consequential early decisions, and the dividing line is gross sales or receipts of ₱3 million within a twelve-month period. Below that, you generally register as non-VAT and may be subject to percentage tax instead, unless you voluntarily register as VAT, which carries stricter invoicing rules and is not easily reversed once elected.

Individual taxpayers below the VAT threshold, sole proprietors and professionals specifically, may also elect the 8% income tax rate on gross sales or receipts, in place of graduated income tax rates and percentage tax. The election needs to be made early, generally at registration or with the first quarterly income tax return, since missing that window defaults you back to graduated rates for the year. Corporations and partnerships are not eligible for this option.

The ₱500 annual registration fee that businesses historically paid through BIR Form 0605 has been removed for many taxpayers under recent reforms, though a documentary stamp tax and costs for books of accounts and printed receipts typically still apply. Confirm current fee requirements with your RDO, since this is an area that has shifted in recent years.

Penalties for skipping registration, or registering late, range from fixed amounts tied to the business location up to tens of thousands of pesos, on top of surcharges and interest on any unpaid taxes. Separate penalties apply for failing to issue proper invoices, failing to register books of accounts, or using an unapproved point-of-sale system, and repeated violations can escalate toward business closure orders.

A Certificate of Registration is not the finish line. Once you have it, the typical next steps are securing or renewing your Mayor's or Business Permit for the registered address, enrolling with SSS, PhilHealth, and Pag-IBIG if you have employees, and setting up whichever invoicing or point-of-sale system you will use to issue compliant receipts from day one. Many new owners bring in an accountant or bookkeeper at this stage specifically to keep books and filings in order from the start.

A few patterns show up repeatedly: applying for a second TIN instead of updating an existing one, registering under the wrong RDO, assuming a DTI or SEC certificate substitutes for BIR registration, treating zero income as a reason to skip filing returns, and issuing invoices before the Authority to Print or system approval comes through. Online sellers and freelancers in particular tend to assume informal or home-based work falls outside registration requirements. It does not. What matters is whether the activity is habitual and for profit, not its size or where the customers are located.