I beg to differ with the "just suck it up" response - here's why:
If you are ON THE CLOCK and ON COMPANY PROPERTY, you are covered by their Worker's Comp insurance. If you CLOCK OUT, and then spend 10 more minutes strolling around company property, what happens if you slip and fall? You are OFF THE CLOCK!!! Sorry, honey...
This is a major lawsuit waiting to happen.
If you want to get your 10 minutes back in a "civilized way", you should check with your state Workers' Comp agency and ask them about the scenario: "
If I clock out from work, but I spend 10 more minutes on company property, am I covered by Workers' Comp if I slip and fall? Or if a fork truck runs over my foot?" I'm not a lawyer, but I have worked in industry before and this seems VERY risky to either YOU or possibly to your company. Theoretically, if you are not "on the job" (on the clock) and you get hurt, I don't think they'd cover you. In that case, you can SUE THE PANTS off your company for your injuries. Your company policy is putting the company at risk. (You don't have to tell the WC people what your company's name is, just make a general inquiry).
Does your company have a "Risk Management" department? That's another place to inquire after contacting your state.