An account used in a partnership to record an individual partner's investment in the partnership plus the indi- vidual's share of any undistributed partnership income. In a corpo- ration, the equity sections have two parts: the contributed capital and retained earnings first works as the amount of shareholder investment, and the second works as the undisturbed income of the firm. In a partner- ship, the equity section have a capital account for each partner that combines that partner's investment and share of undistributed income.