1. The responsibility of those who are of a higher authority than oneself, denoted by the level of pay which one receives in comparison to one's superiors. All these questions you're asking are beyond your pay grade. He had some great ideas about how to run the company, but contributing such things was beyond his pay grade.

2. Above or beyond one's skill, knowledge, ability, or willingness to participate. He soon realized that the details of the IT development project were a bit beyond his pay grade. Sorry, fishing garbage out of the lake is beyond my pay grade.