A cummerbund belt assembly for retaining a cummerbund in a preferred position includes a cummerbund is wearable around a waist of a user to enhance the appearance of formal dress. A plurality of couplers is each coupled to and extends downwardly from the cummerbund. Each of the couplers is positioned at strategic locations along the cummerbund such that each of the couplers is aligned with a respective plurality of suspender buttons in the trousers. Moreover, each of the couplers releasably engages the respective suspender button to inhibit the cummerbund from riding upwardly on the user's waist when the cummerbund and the trousers are worn.