My personal definition of “upper class” excludes anyone who actually has to work. Wikipedia seems to agree, putting “CEOs and successful business owners” in the upper middle class. And the New York Times considers the 90th to 99th percentile of earners upper-middle-class.
I do see some places defining “upper class” as those earning at least twice the median household income (so about $150,000) but I don’t think that matches common usage. Is a software developer right out of college upper class? Or a nurse practitioner? I would say “clearly no, unless they happen to be from a very wealthy family”.