About RIRS
Office Address
22, William Jumbo Street, Old GRA, Port Harcourt
Official Portal
File your Annual Returns and verify your TCC on the official portal.
Visit RIRS WebsiteWhy use a specific calculator for Rivers?
While the Personal Income Tax Act (PITA) is a federal law that applies nationwide, each state's Internal Revenue Service (like RIRS) is responsible for collecting taxes from individuals residing in that state.
Our calculator ensures you understand your liability specifically for Rivers State.
