The Ministry of Finance says employees, sole traders, partnerships and companies are legally required to register for a BIR file number. Companies and sole traders that hire employees must obtain a PAYE number. The Government does not charge a fee for the BIR/PAYE registration service; BizReg’s TTD $400 is a professional assistance fee.
BIR number: the taxpayer identifier
The Inland Revenue Division describes the BIR Number as the identification number used by the Board of Inland Revenue in administering the tax laws. It must be quoted on tax returns, statements, tax-related documents and most communication with IRD.
IRD distinguishes several tax registrations under this system: an Individual Income Tax File Number, Company File Number, PAYE Number and VAT Registration.
Who needs a BIR file number
The Ministry of Finance states that all employees, sole traders, partnerships and companies are legally obligated to register for a BIR file number for tax payments and returns.
A Companies Registry certificate does not replace this. A sole trader can have a registered business name and still need the individual tax file process; a company is a separate legal person and needs the applicable company file number.
PAYE is triggered by employing people
The Ministry of Finance states that companies and sole traders that hire employees must obtain a PAYE number. The number is used to remit income tax withheld from employees under the Pay-As-You-Earn system.
That means a new sole trader with no employees should not treat PAYE as another label for the BIR number. When the business becomes an employer, PAYE and NIS should be prepared as part of the payroll setup.
Current forms and core IRD requirements
| Registration | Current IRD form / evidence |
|---|---|
| Individual BIR file number | IA-001 and valid identification |
| Company File Number | AOI-002 and valid identification for company directors |
| PAYE Number | AOI-002 and valid identification for company directors under IRD guidance |
| VAT Registration | Separate VAT requirements, including evidence of income above the current threshold |
The Ministry's service page also lists the Certificate of Incorporation/Registration, director/file-number information, Notices of Directors and Address for company applications, and the Certificate of Registration/ID for sole traders where applicable.
Online routes depend on the type of registration
IRD currently says an individual can apply online for a BIR number through e-TAX. For Company File Number, PAYE and VAT registrations, the IRD page says online access is available where the applicant is already registered for TTBizLink through TTConnect.
Online availability and portal workflows can change. Use the current IRD page at the time of filing rather than an old screenshot or third-party checklist.
The Government registration service has no fee
The Ministry of Finance's BIR/PAYE service page states that there is no fee for the Government service.
BizReg's TTD $400 BIR & PAYE Registration Support fee is a professional assistance fee for preparing and supporting the administrative process. It is not a Government charge for issuing the tax numbers.
What happens after PAYE registration
PAYE registration is the start of the employer tax process. Employees supply their BIR file numbers and the employer must calculate and remit the deductions required by the PAYE rules. The employer also issues the appropriate annual employee certificates and maintains payroll records.
Employer setup should be coordinated with NIS Employer Registration, because NIBTT has a separate employer-registration and contribution regime.
BIR/PAYE and VAT are separate decisions
A business can need a BIR/company file number without being VAT registered. VAT registration depends on the VAT Act and the current turnover/forecast threshold. The live IRD VAT guidance currently uses TT$600,000 in commercial supplies in a twelve-month period.
Read the VAT Registration guide before assuming a PAYE number or company file number automatically creates VAT status.
Prepare the tax file as part of post-registration readiness
For a new business, tax registration should sit beside NIS, banking and company compliance in the launch checklist. BizReg offers BIR & PAYE Registration Support — TTD $400 and NIS Employer Registration Support — TTD $400.
Tax treatment, liabilities and return preparation can require a qualified tax professional or accountant. BizReg's published service is administrative registration support.
Questions people ask
Does a sole trader need a BIR number?
Yes. The Ministry of Finance states that sole traders are legally obligated to register for a BIR file number.
Does every business need PAYE?
PAYE is tied to employing people. The Ministry says companies and sole traders that hire employees must obtain a PAYE number.
Does the Government charge for BIR or PAYE registration?
The Ministry of Finance service page states that there is no fee for the Government registration service.
Is PAYE the same as VAT?
No. PAYE concerns employee income-tax withholding; VAT is a separate tax registration based on taxable commercial supplies and the VAT rules.
References
Requirements can change. Check these references for current details.