DOR Taxation web site

Estimated Payments

A Colorado individual taxpayer must make estimated income tax payments if it can reasonably be expected that the net Colorado income tax liability for the current taxable year will exceed the Colorado sales tax refund (if applicable that year) and withholding credits by $1,000 or more. Taxpayers who underpay estimated tax may be subject to a penalty.


Pay By Mail
You can file estimated tax by using the Estimated Individual Income Tax Payment Vouchers (104EP). Mail payments to

Colorado Department of Revenue

Denver, CO 80261-0008

 

Pay Online

You can make estimated tax payments through the Online Tax Payment service by credit card or echeck.

 

Estimated tax payments submitted by a married couple that will file a joint tax return must show the names of each spouse and the social security numbers in the same order on the estimated tax payment voucher (104EP) as on the Colorado individual income tax form (104) or the electronic filing. For more information, please see FYI Income 51.

 

Due Dates

Estimated tax payments are due in four equal installments on

  • April 15 (first calendar quarter)
  • June 15 (second calendar quarter)
  • September 15 (third calendar quarter)
  • January 15 (fourth calendar quarter)

If the due date falls on a Saturday, Sunday or state holiday, payment is due on the next business day.
More on Estimated Tax
  • To compute estimated income tax please see the worksheet provided in the 104EP booklet.
  • Estimated income tax may be paid by check, Electronic Funds Transfer or with an echeck or credit card through the Colorado Online Tax Payment service.
  • Check your estimated tax payments on the Income Tax Account Information Web site.
  • Estimated tax payments are claimed when you file your Colorado Individual Income Tax Return (104).