Business calculus isn't as difficult as the regular calculus that most applied science majors need to know, but you would still need a foundation in pre-calc to understand it, and taking precalc in college would probably be harder than taking it in high school.

Is precalculus needed for calculus?

Precalculus prepares students for calculus somewhat differently from the way that pre-algebra prepares students for algebra. ... For example, an honors-level course might spend more time on conic sections, Euclidean vectors, and other topics needed for calculus, used in fields such as medicine or engineering.

Can you skip pre-calc and go straight to calculus?

you can def skip trig/precalc and go straight to calc. as long as you can use a unit circle, you should be fine with the trig. precalc spends weeks on the first thing you learn in calc1, so it's pretty much a big waste of time.