Taxes: FYI

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:

• 2025 Standard mileage rate is .70 cents

• 2025 medical or moving mileage rate is .21 cents
• 2025 charity mileage rate is .14 cents
• 2025 Depreciation mileage rate is .33 cents

Income Tax Return Due Dates:

• Individuals – 4/15/25; may be extended until 10/15/25.
• Partnerships and S Corporations – 15th day of the 3rd month after year end; may be extended 6 months (Calendar-year taxpayers due 3/17/25; may be extended until 9/15/25.)
• C Corporations – 18th day of the 4th month after year end; may be extended 6 months. (Calendar-year taxpayers due 4/15/25; may be extended 10/15/25.) (If fiscal year end is other than Dec 31 please go here)
• Trusts – 18th day of the 4th month; may be extended 5 months and 15 days. (Calendar-year taxpayers due 4/15/25; may be extended 9/30/25.)
• Tax-Exempt Organizations – 15^th day of the 5^th month after year end; may be extended 6 months.

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