A taximeter assembly including an electronic calculating module with data memory, an operating keyboard, as well as a data indicating device, consists of two flat housing panels which are joined by detent devices and which are secured together by a lead-sealable screw connection. An electronic taximeter circuit wired on a single printed circuit board is installed between the housing panels and feed-in of all electrical transmitter lines and supply lines is effected, as desired, from the rear or from below, wherein the latter are guided directly to connectors on the printed circuit board. The rear wall of the rear housing panel is constructed, at the same time, as a mounting plate for installation in a vehicle. A compact, extremely flat taximeter device having its circuitry in a single printed circuit board system enables arrangement of the device in an optimal installation position within or on the outside of the dashboard of a vehicle.