A posture support system that includes a base portion, a vertical arm portion extending from the base portion, a horizontal arm portion extending from the vertical arm portion, and a support portion extending from the horizontal arm portion. The base portion includes a rectangular board that rests on a flat surface. The vertical arm and horizontal arm portions are fully adjustable to accommodate different users when a user rests against the support portion to perform work, such as typing, on the flat surface. The posture support system induces proper seated posture.