dont do this "by what age" shyt
when i graduated college my first job i made 65k and that was low compared to my friends. one of my friends is 33 and hasnt cracked 75k yet
my friends brother is 28 and does some kind of trading shyt and is making over 200
it depends on a shytload of diff factors, what field you're in, where you live, opps for growth within ur field/company.
a better question(s) would be to ask how u can reach 100k in ur field and see how to get there.
i work in SF, making 100k aint shyt here cuz of the cost of living.