Hello Cgh. Epson uses ISO/IEC 24711 tests to determine page yield. Please note your results can vary based on printer model, print settings, image size, paper type, etc. A new set of standard capacity T812 ink cartridges can print approximately 350 Black or 300 Color ISO pages. Alternatively, with a new set of T812XL ink cartridges, you can expect to print approximately 1,100 Black and 1,100 Color ISO pages. Regards, Kevin - The Epson Team.