Oyo State's tax authority splits its online presence across separate addresses. One is a general site. Another is a self-service portal for registering and checking a tax clearance certificate.
What OYIRS covers for Oyo residents
The Oyo State Internal Revenue Service, OYIRS, collects personal income tax from residents of the state. As with every state, that follows the tax authority of the state where the employee lives. It is not about where a resident happens to work each day.
OYIRS's own presence online starts at bir.oyostate.gov.ng. It sits within the wider Oyo State Government site.
An employee's PAYE still goes through their employer's payroll first. A self-employed resident in Oyo deals with OYIRS more directly, through registration and assessment.
Finding the self-service portal
Registration and certificate checks happen elsewhere, at selfservice.oyostatebir.com. That is the self-service portal OYIRS points residents to. It is a separate address from the general site.
Bookmarking the self-service address directly saves a click through the main site every time you need it. The general site is a good starting point if you have lost track of the self-service address. The portal itself is not a .gov.ng address, so reach it from the OYIRS site rather than from a search result.
Registering as a payer
Payer registration is the self-service portal's first job. It is the step that puts you on OYIRS's own record as a taxpayer, ahead of any payment or filing.
A self-employed resident has the most reason to do this directly. There is no employer registering anyone on their behalf. An employee's registration sometimes happens through payroll, but it is still worth confirming rather than assuming it was done.
Have your basic identifying details ready before you start. A registration form that half-fills and stalls is more frustrating than one you complete in a single sitting.
What else the portal lets you do
Beyond registration, the self-service portal lists a tax clearance certificate check among its functions. That lets you confirm a certificate against OYIRS's own record rather than taking a paper copy on trust.
OYIRS has also named a separate payment address alongside the self-service portal. Keep a record of each payment reference in case a query comes up later.
Keeping your details current
A payer record is only useful if it reflects where you actually live and work now. Update your details on the self-service portal if either changes, rather than leaving an old address on file.
Moving out of Oyo entirely changes which authority you owe going forward, covered in our checklist for moving states mid-year. For the annual return that sits alongside registration, see filing your individual annual tax return. For how the self-employed are assessed without a payroll department involved, see personal income tax for the self-employed, and browse other states in the PAYE and state tax hub.