A ready to assemble chair base includes three leg components. First and second leg components each include two of the five legs, and a third leg component includes a single leg. A hub portion of all three components includes a portion of the central tapered hole. The hub portions of the first and second components join together with vertical interlocking surfaces slidably locking together in the direction of the axis of the central tapered hole. The hub of the third leg component is formed in the shape of a tenon blade and is inserted into a horizontal mortise slot (perpendicular to the axis of the central hole) formed by the interlocked hubs of the first and second leg components. A gas lift post is received into the center, tapered hole of the assembled base locking all three components together.