Permitted Work

I haven't been offered a position but am at the interview stage and wanted to ask: the permitted work rules for ESA are under 16 hours and earning less than £125.50. But as not all employers pay the minimum wage (some pay more) does your ESA benefit completely stop if you earn more, like for example £138? I receive PIP. I also worry a lot about working because my ESA is up for reassessment in the Summer and I worry that they will believe I am well and fine because of working, which isn't the case. Thank you.