Extension of Time to File

Colorado Extension applies to filing the information, not to payment

If you can’t file your 2012 Colorado individual income tax return by Monday, April 15, 2013, you may take advantage of the state’s automatic six-month extension of time to file. There is no form, paper or electronic, to fill out to notify the Department of Revenue that you are taking the extension.

There’s no extension for tax due

The extension applies to filing Colorado income tax information, either on paper or electronically, not to any state income tax you may owe. If you expect to get a refund this year but do not make the April 15 filing deadline, you can still file your state income tax on or before Tuesday, Oct. 15, 2013.

But, if you owe state income tax, 90 percent of the tax liability must be paid on or before April 15 to avoid penalties. Any remaining balance due would be subject to interest only.

What are the penalty and interest rates?

  • Interest rate for 2012 is 6 percent on tax owed. A discounted rate of 3 percent is available if payment of tax, or agreement to pay, is made within 30 days of the April 15 deadline.
  • Penalty is 5 percent of the balance due for the first month past the April 15 deadline plus 0.5 percent for each additional month up to a maximum of 12 percent.

For more information, please see the Extension of Time to File Web page.