Abstract: A portable automatic billing and printing device which provides for an automatic calculation and printout of a customer bill for utilities such as water, gas and electricity. A customer utility card is positioned within the apparatus and pertinent data is automatically read from the card and provided as electrical signals to a calculating unit. Means are provided for the manual input of present meter readings to provide additional signals to the calculating unit. Output data from the calculating unit is imprinted on the customer card and pertinent data is also provided on a memory storage device which may be removed from the main device housing for further processing in the central office.