I suggest you take a look at
www.rvhb.com, the site for one
of the biggest law-firms in RD. Generally speaking, taxes
are very low, but there seems to be much confusion about it.
I myself pay approx 7 %, but it may be unrepresentative,
since my workplace is in a "free zone". (A zone with certain
tax advantages) There are some progressiveness, but to the best
of my knowledge it starts at VERY high salaries.
Good luck and welcome to RD!
Gunnar, working in Santiago and living in Jarabacoa