Tax season is stressful, especially when you're running around gathering all the papers.

The good news is that filing a Colorado extension gives you time to get everything together without the late filing penalty.

Whether you're waiting on documents or need some space, this will walk you through the steps to file an extension in Colorado and avoid the surprise.

Ready? Go!

Colorado Extension Requirements

Colorado automatically grants all taxpayers a 6-month extension to file their state income tax return — no form required.

But remember: This is an extension to file, not to pay.

To avoid late payment penalties, you must pay at least 90% of your total state tax liability by April 15th.

If you owe taxes:

• Pay online using Colorado Revenue Online, or
• Mail your payment with Form DR 0158-I
  🔔 Note: This form is only a payment voucher, not an extension request.

Important Colorado Extension Deadlines

• Original Tax Deadline: April 15th
• Extended Filing Deadline: October 15th

To avoid penalties, you must pay at least 90% of your total Colorado state tax liability by the original deadline (April 15th). The extension only gives you more time to file, not more time to pay.

When is my new deadline for filing a tax extension for Colorado?

The extended filing deadline in Colorado is automatic — if you need more time to file, you have until October 15th.
Just be sure to pay at least 90% of your total tax liability by the original deadline to avoid penalties.

How to Make a Colorado Tax Extension Payment

You don’t need to file anything to receive a filing extension in Colorado. The extension is automatic.

If you expect to owe taxes:

• Use Form DR 0158-I to send a payment by mail — or
• Pay online through the Colorado Revenue Online portal.

📝 Note: The DR 0158-I is not required unless you are mailing a payment.

Follow these simple steps to make a payment in Colorado:

• Mail: Send your form and payment to: Colorado Department of Revenue, Denver, CO 80261-0008 (No street address required)
• Online: Ensure your online submission is completed by 11:59 p.m. on April 15th.
• Save a Copy: Keep a copy of your form and payment confirmation for your records.

How Colorado Compares to Nearby State Tax Extensions

Tax extension rules can vary significantly depending on the state.

If you live near state borders or recently moved, it’s important to understand how Colorado’s automatic extension compares to neighboring states before filing.

Colorado’s rules differ from nearby states. For example, Utah tax extension requirements may vary depending on payment timing and filing status.

Similarly, New Mexico state tax extension rules may require additional documentation depending on the taxpayer’s situation.

Taxpayers should also review Kansas tax extension rules, as payment expectations can differ from Colorado’s automatic extension.

Nearby, the Nebraska extension deadline follows similar timing but may have different filing requirements.

Some taxpayers also compare policies with a California tax extension, especially since California has unique disaster relief extensions in certain years.

Let's Wrap it Up

Filing a Colorado tax extension gives you more time to file your return, but it does not extend the deadline to pay your taxes.

To avoid penalties, make sure you pay at least 90% of your total tax liability by April 15.

If you still need more time to prepare your federal return, you can begin your extension process here.

Work with Our Experts!

Tax return extensions are usually simple. However, figuring out federal tax extensions can be a bit tricky.

Luckily, you don't have to do it alone – work with our tax experts to ensure everything is filed correctly and on time. Click here now to create an account and get started!

Summary of Colorado General Fund Gross Receipts and Marijuana Tax Revenues

The Colorado Gross Receipts by Source chart for fiscal years 2019-2023 illustrates that income and sales taxes are the most significant contributors to the state's revenue. In 2023, gross receipts reached $22.8 billion, with income and sales taxes being the most significant sources.