An image forming apparatus includes a main body memory, and a controller. A second upper limit information stored in the main body memory indicates an upper limit of a printable page number that the image forming apparatus is allowed to print in a state where the image forming apparatus is in an off-line state. A printed page number information stored in the main body memory indicates a printed page number printed in the off-line state. The controller is configured to: increment the printed page number information by one in a case where the one sheet of paper is printed on one side printing; and increment the printed page number information by two in a case where the one sheet is printed on double-sided printing. The controller is configured to determine whether the printed page number information is greater than or equal to the second upper limit page number.