Kwara State Internal Revenue Service (KW-IRS) is a pivotal institution established under the Kwara State Revenue Administration Law of 2015. Designed to enhance the state's financial independence and governance efficiency, KW-IRS is the exclusive authority responsible for tax administration and related services in Kwara State. Its core mandates focus on upholding tax law integrity, averting multiple taxation, and supporting the government’s economic and social goals.

KW-IRS actively encourages voluntary tax compliance, thereby empowering citizens to engage in the decision-making processes that shape their community. With a vision aimed at strategically mobilizing revenue for the state's development, KW-IRS is committed to using innovative approaches that add value and integrity to the revenue collection process. Under the leadership of Executive Chairman Shade Omoniyi, who took office in October 2019, the organization strives to serve the residents of Kwara State effectively, ensuring that the tax system not only meets legal standards but also aligns with the developmental objectives of the government.