Solution
The lifetime of the Canon genuine starter toner cartridge which comes with the machine is approximately 1,000 pages, and the lifetime of the Canon genuine replacement toner cartridge is approximately 2,000 pages. The page counts are on the basis of "ISO/IEC 19752"* when printing A4 size paper with the default print density setting. The level of toner consumption varies depending on the type of documents printed. If your average document contains a lot of graphics, tables, or charts, the life of the toner cartridge will be shorter as they consume more toner.
* "ISO/IEC 19752" is the global standard related to "Method for the determination of toner cartridge yield
for monochromatic electrophotographic printers and multi-function devices that may contain printer components" issued by ISO (International Organization for Standardization).