A multi-compartment walk-in bathtub is disclosed that allows for a first compartment of the walk-in bathtub to be filled with a quantity of water while a second compartment of the walk-in bathtub allows the user to enter the bathtub. A first movable gate contains a volume of water in the first compartment while the second compartment is in an unfilled condition. A second movable gate is operable to open and close an entry sidewall of the bathtub, allowing the user to enter the second compartment. The second movable gate is then moved to a closed position. When the second movable gate is in the closed condition, the first movable gate may be moved to an open condition to release the volume of water and fill the walk-in bathtub to a filled condition. A seat may be provided that is selectively elevated and lowered by drive mechanism.