Interest continues to accrue until paid in full. Interest is calculated as follows:
Effective Oct. 1, 2019, through Dec. 31, 2019
- 7.75% interest compounded quarterly
Jan. 1, 2019, through Sept. 30, 2019
- 8.25% interest compounded quarterly
Oct. 1, 2018, through Dec. 31, 2018
- 8% interest compounded quarterly
July 1, 2018, through Sept. 30, 2018
- 7.75% interest compounded quarterly
April 1, 2018, through June 30, 2018
- 7.50% interest compounded quarterly
Jan. 1, 2018, through March 31, 2018
- 7.25% interest compounded quarterly
July 1, 2017, through Dec. 31, 2017
- 8.75% interest compounded quarterly for Oil and Gas Production
- 4.75% simple interest for all other tax types
April 1, 2017, through June 30, 2017
- 8.50% interest compounded quarterly for Oil and Gas Production
- 4.50% simple interest for all other tax types
Jan. 1, 2017, through March 31, 2017- 8.25% interest compounded quarterly for Oil and Gas Production
- 4.25% simple interest for all other tax types
Jan. 1, 2016, through Dec. 31, 2016
Jan. 1, 2014, through Dec. 31, 2015
Oct. 1, 2007, through Dec. 31, 2013- 11% interest compounded quarterly
July 1, 2006, through Sept. 30, 2007- 11.25% interest compounded quarterly
Oct. 31, 1991, through June 30, 2006- 11% interest compounded quarterly
July 1, 1982, through Oct. 30, 1991