Income Tax Due Dates & Filing Extension
Who Must File?
Due Dates & Extensions
W-2 & 1099 Statements
Donate Your Refund to Charity
New Colorado Residents
Military Service Members
Request a Tax Return Copy
Frequently Asked Questions
2019 Income Tax Deadline Extension
Governor Jared Polis has extended the income tax payment deadline for all Colorado taxpayers by 90 days until July 15, 2020. Interest from the due date of the payment until July 15, 2020 is waived. All income tax returns that were required to be filed by April 15, 2020 are granted an automatic six-month extension, and are due on or before October 15, 2020.
In addition, the deadline for estimated payments has also been extended for the 2020 tax year. The penalties for estimated payments are also waived until July 15, 2020. This extension and these waivers do not apply to payments plans, current/prior unpaid tax notices (bills), or tax years 2018 and prior.
This is similar to the Internal Revenue Service (IRS) extension, but applies to any income tax payment, regardless of the amount. Unlike the federal government, the state will not impose any caps on the amount of tax that can be deferred.