BEN Bentonite Production Tax


All bentonite producers must file a Bentonite Production Tax return every six months.

Due dates:

  • Period ending June 30: August 14
  • Period ending December 31: February 14

Tax Rates

We calculate the bentonite production tax rates every year using the formula found in 15-39-101, MCA.

Montana taxes bentonite per ton before crushing and drying.