Enterprise Zone Certification:

As of 1/1/2012, businesses must now be pre-certified to qualify for tax credits. Learn more: Enterprise Zone Major Legislative Changes,  Enterprise Zone Program Fact Sheet and Upstate Colorado letter

 Standard mileage rates:

  • 2021 Standard mileage rate is 56 cents
  • 2021 medical or moving mileage rate is 16 cents
  • 2021 charity mileage rate is 14 cents
  • 2021 Depreciation mileage rate is 26 cents

 

  • 2020 standard mileage rate is 57.5 cents
  • 2020 medical or moving mileage rate is 17 cents
  • 2020 charity mileage rate is 14 cents
  • 2020 Depreciation mileage rate is 27 cents

Income Tax Return Due Dates:

  • Individuals – 4/15/21; may be extended until 10/15/21.
  • Partnerships and S Corporations – 15th day of the 3rd month after year end; may be extended 6 months (Calendar-year taxpayers due 3/15/21; may be extended until 9/15/21.)
  • C Corporations – 15th day of the 4th month after year end; may be extended 6 months. (Calendar-year taxpayers due 4/15/21; may be extended 10/15/21.) (If fiscal year end is other than Dec 31 please go here)
  • Trusts – 15th day of the 4th month; may be extended 5 months and 15 days. (Calendar-year taxpayers due 4/15/21; may be extended 9/30/21.)
  • Tax-Exempt Organizations – 15th day of the 5th month after year end; may be extended 6 months.

Colorado returns for all entities – 15th day of the 4th month following year end, automatic 6-month extension if federal extension is filed.