how much does it yield

It is rated at 30,000 page yield. Yield is approximate and may vary by type of use. To explain this technically and legally, this rating is in accordance with ISO/IEC 19798 standard. Youc an google this ISO/IEC 19798 standard on page yield and you will find all in detail as well as sample reports. To explain it in plain English, it will give you 30,000 pages if you are printing something like a cover letter page without any graphic. Printing full page text or something with graphic will use the drum/toner up more quickly.