A subscriber station for a bus system and a method for time-optimized data transmission in a bus system are provided. The subscriber station comprises a coding device for coding and/or decoding bits of a message to/from at least one further subscriber station of the bus system, in which at least temporarily an exclusive, collision-free access of a subscriber station to a bus line of the bus system is ensured, wherein the coding device is designed to allocate, during the coding of the message, to at least two bits as bit combination, a predetermined voltage level for a bit time and/or wherein the coding device is designed to allocate, during the decoding of the message, at least two bits as bit combination to a predetermined voltage level for a bit time.