Rivers State Internal Revenue Service

What Rivers State Internal Revenue Service does

Rivers State Internal Revenue Service (RSIRS) is the statutory government agency responsible for assessing, collecting, and administering internal revenue taxes due to the Government of Rivers State, Nigeria. Operating under Nigerian federal/state tax law, RSIRS holds the exclusive mandate to register taxpayers, enforce compliance, and remit collections to the State Treasury. Its service population comprises every individual, SME, and corporate entity operating or residing in Rivers State, with no commercial alternative permitted within the jurisdiction.

The agency's core product is RIVTAMIS (Rivers State Tax Administration Management Information System), a unified digital platform hosted from its Port Harcourt headquarters. RIVTAMIS consolidates taxpayer registration via RivTIN, online tax payments routed through more than 20 commercial bank partners, and inter-agency data exchange with the Federal Inland Revenue Service (FIRS) and Joint Tax Board (JTB). The platform exposes self-service tax calculators for PAYE, Stamp Duty, and Capital Gains Tax, and offers public verification services for Tax Clearance Certificates (TCC) and Withholding Tax (WHT) credits. The agency is staffed by 94 personnel and led by Executive Chairman Sir Israel O. Egbunfu (FCTI).

RSIRS's business model is non-commercial: it does not sell goods or services and earns no revenue in the conventional sense. Its funding flows from Rivers State Government appropriations, and the economic value it generates is measured in taxes collected and remitted to the State consolidated revenue fund, not in top-line income. The agency's competitive position rests entirely on its statutory monopoly and on its operational execution through RIVTAMIS, which functions as both a compliance backbone and a public-facing taxpayer interface.

Name

Rivers State Internal Revenue Service

Legal name

Rivers State Internal Revenue Service

Website

https://riversbirs.gov.ng

Company type

Private

Operating status

Operating

Headcount range

51–100 employees

Short description

Rivers State Internal Revenue Service (RSIRS) is the statutory tax authority for Rivers State, Nigeria, operating the RIVTAMIS digital platform to register taxpayers, collect internal revenue taxes through 20+ bank partners, and deliver self-service compliance and verification services.

Ownership category

akta.pro rank

Product category

Government Tax Administration

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (5412), Regulation, Licensing, and Inspection of Miscellaneous Commercial Sectors (926150)

akta.pro primary industry

Tax Return Filing, Processing & Assessment (BPAIADAC)

akta.pro secondary industries

Revenue Systems, E-Filing & Digital Tax Administration (BPAIADAO), Taxpayer Registration, Identity & Account Management (BPAIADAB), Revenue Intelligence, Analytics & Risk Management (BPAIADAL), State/Provincial Taxation & Revenue Administration (BPAIABAD)

Keywords

• State tax administration
• Tax collection services
• Revenue mobilization
• Taxpayer self-service portal
• PAYE tax collection

Headquarters

HQ city

Port Harcourt

HQ country

Nigeria

HQ region

Africa

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales, Others

Revenue model

1. Tax Collection Services: Government tax collection agency collecting various taxes on behalf of Rivers State Government. Revenue is generated through collection of multiple tax types including Personal Income Tax (PAYE, Direct Assessment), Business Premises Registration/Renewal, Property Tax, Stamp Duty, Capital Gain Tax, and various other state taxes.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Rivers State Internal Revenue Service (RSIRS) is a government tax administration agency that assesses, collects, and administers state-level taxes in Rivers State, Nigeria. It operates the RIVTAMIS online platform, which enables taxpayers to register, file returns, calculate taxes (PAYE, Stamp Duty, Capital Gain Tax), pay taxes, verify Tax Clearance Certificates, and manage demand notices online. Tax collection covers Personal Income Tax, Business Premises Registration, Property Tax, Stamp Duty, Capital Gain Tax, Withholding Tax, and other state-specific levies.

Product overview

RIVTAMIS (Rivers State Tax Management Information System) is a single unified online platform that provides comprehensive tax management services for the Rivers State government. The core platform encompasses online tax payment, e-filing, registration, and tax record management. It includes specialized calculator modules for PAYE (Pay As You Earn), Stamp Duty, and Capital Gain Tax calculations. Additional features include TCC (Tax Clearance Certificate) verification, WHT (Withholding Tax) verification, RIVTIN search functionality, and demand notice management. The system supports both individual and corporate taxpayers with 24-hour account activation.

Differentiator

Problem solved

Functional benefit

Brands

• RIVTAMIS: Rivers State Tax Management Information System - an online platform that provides taxpayers and tax administrators a convenient and effective means of paying and managing taxes and tax information.

Products and services

• RIVTAMIS (Rivers State Tax Management Information System) A government tax management platform that provides taxpayers and tax administrators an online system for paying and managing taxes. It enables the tax-paying public to pay taxes, file returns, request Tax Clearance Certificates, verify demand notices, and own their tax records and tax-related activities.
• PAYE Tax Calculator An online personal income tax calculator that simulates tax rates under current and proposed Nigeria Tax law, allowing users to compare tax obligations. It supports gross income input with deductions for NHF, NHIS, pension, life insurance, and rent relief.
• Stamp Duty Tax Calculator A calculator for computing stamp duty taxes on lease and mortgage transactions with property value inputs.
• Capital Gain Tax Calculator A calculator for computing capital gain tax based on cost of sales and sales proceeds.

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

21 partnerships are on record, tiered core.

• Federal Inland Revenue Service (FIRS)coreStrategic or Co-development PartnerFederal government counterpart for tax administration. FIRS handles federal taxes while RSIRS handles state taxes. Collaboration ensures proper tax coordination between federal and state levels, prevents double taxation, and enables verification of Tax Clearance Certificates.
• Joint Tax Board (JTB)coreStrategic or Co-development PartnerJTB is a federal body that coordinates tax administration across Nigerian states. RSIRS works with JTB to standardize tax practices and ensure consistency in tax compliance across jurisdictions.
• Access BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0006790611, Sort Code: 044210937. Provides bank branch and electronic payment collection services for tax payments.
• CitibankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0011267008, Sort Code: 023150005. Provides bank branch and electronic payment collection services.
• First Bank of NigeriacoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 2014239360, Sort Code: 011212942. Major Nigerian bank providing tax payment collection services.
• Guaranty Trust Bank (GTBank)coreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0167839553, Sort Code: 058215054. Provides tax payment collection services.
• United Bank for Africa (UBA)coreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 1012830182, Sort Code: 033212687. Pan-African bank providing tax payment collection services.
• Zenith BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 1130009156, Sort Code: 057210018. Major Nigerian bank providing tax payment collection services.
• EcobankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 2162119403, Sort Code: 050210989. Provides tax payment collection services across Nigeria.
• Stanbic IBTC BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 9200439837, Sort Code: 221210080. Part of Standard Bank Group providing tax payment collection.
• Sterling BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0058260020. Provides tax payment collection services.
• Fidelity BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 2923129001, Sort Code: 070210299. Provides tax payment collection services.
• First City Monument Bank (FCMB)coreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0129577022, Sort Code: 214210013. Provides tax payment collection services.
• Diamond Bank (Access Bank)coreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0013341489, Sort Code: 063210633. Now merged with Access Bank.
• Heritage BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank with two accounts: 5600000466 (Sort Code: 030210077) and 0003948103. Provides tax payment collection services.
• Keystone BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 6010007672, Sort Code: 082210067. Provides tax payment collection services.
• Skye Bank (Ecobank)coreChannel Partner/ Reseller/ DistributorOfficial payment bank with two accounts: 1790029960 (Sort Code: 076211357) and 1790218780 (Sort Code: 076213562). Now merged with Ecobank.
• Union Bank of NigeriacoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0030125374, Sort Code: 032216545. Provides tax payment collection services.
• Unity BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0017814234, Sort Code: 215213349. Provides tax payment collection services.
• Wema BankcoreChannel Partner/ Reseller/ DistributorOfficial payment bank. Account Number: 0121217880, Sort Code: 035210852. Provides tax payment collection services.
• Federal Government of NigeriacoreStrategic or Co-development PartnerFederal government body that establishes overall tax policy framework within which RSIRS operates. RSIRS collects state taxes under the framework of national tax laws and regulations.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Delta State Internal Revenue Service: Delta State's IRS handling individual income tax, business premises registration, and other state taxes under the same Nigerian regulatory framework as RSIRS.
• Kano State Internal Revenue Service (KIRS): Kano State's tax administration body handling state-level taxes across individuals and corporates. Operates under the same Nigerian state-tax framework as RSIRS with analogous functions.
• Lagos State Internal Revenue Service (LIRS): Lagos State's tax administration agency, operating a digital tax platform (eTax) with comparable mandates — PAYE, WHT, business premises, and stamp duty. It is the most analogous Nigerian state IRS in terms of scale and digital maturity.
• Ogun State Internal Revenue Service (OGIRS): Ogun State's tax authority with a comparable mandate covering individual income tax, business premises, and other state taxes. Operates a digital platform with similar self-service capabilities for taxpayers.

Broad incumbents

• Joint Tax Board (JTB): Statutory federal body that coordinates tax administration across Nigerian states. Listed as a core strategic partner of RSIRS and shapes the standardisation of digital tax platforms across states.
• Federal Inland Revenue Service (FIRS): Nigeria's federal tax authority covering corporate income tax, VAT, and federal levies. FIRS is explicitly listed as a strategic partner of RSIRS and represents the broader incumbent in the same regulatory family.

Regional players

• Accra Revenue Authority (GRA): Ghana's domestic tax authority providing digital tax administration for individuals and businesses. While geographically separate, it is highly analogous in function and digital-first approach to African state-level revenue services.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/rivers-state-internal-revenue-service

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Rivers State Internal Revenue Service