First, we need to define what is the 5% rule toner cartridge usage on your laser printer, digital copier all in one machine. When HP toner cartridge specifications says 10,000 pages at 5% it means 10,000 pages of text DOUBLE space on a 8.5" by 11" with 1.25" margins (see below for actual sample of 5% text n page). If you just send simple memos on your laser printer copier then you are set. However, most companies especially accountant and lawyers use way more toner per page than 5%. Here is a 5% (between the dotted lines page of toner on HP laser printer, Sharp copier, Canon printer copier or other brand of office equipment:
Start with this, which is 5% page coverage for a hp printer or digital copier. You will notice its only two paragraphs long. If this is all you print on the average then the estimated pages per toner cartridge the manufacture specifies will be close. However, you will notice there are no graphics, company logos or anything else. If you print graphs or tax returns your rate of usage will be much higher.
If you are using a color laser printer copier, then you need to be careful; because if the color toner cartridges on your laser printer or digital copier says 5,000 pages then it is not 5,000 each color toner cartridge but a COMBINED total of the cyan, magenta and yellow. This end of 5% coverage example of text a standard sheet of paper printed on your laser printer, color copier or all in one copier printer scanner device - end of 5 %.