Colorado State Tax Extension: A Detailed Guide

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 and interest, 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 and interest, 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.

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.

FAQs

Do I Need to Pay My Colorado Taxes When I File a Tax Extension?

Yes. While Colorado gives you an automatic 6-month extension to file, you must pay at least 90% of your total state tax liability by April 15th to avoid late payment penalties. Interest will still apply to any unpaid balance.

Who is Eligible for a Tax Extension in Colorado?

All Colorado taxpayers automatically qualify for a 6-month extension — no application or form is required. However, to avoid late payment penalties, you must pay at least 90% of your total tax liability by the original deadline.

What Are the Penalties for Filing My Taxes Late in Colorado?

• A one-time penalty of 5% of the unpaid tax or $5, whichever is greater.
• An additional 0.5% per month on the unpaid balance, up to a maximum of 12%.

What Are the Penalties for Paying My Taxes Late in Colorado?

Interest is charged on any unpaid tax balance:

• 9% annually if paid before a late notice is issued.
• 12% annually if paid after a late notice is issued.

👉 Note: Even if you avoid a late payment penalty by paying 90% by the deadline, interest still accrues on any unpaid amount.

Can I get automated tax notification updates?

Yes. You can sign up for Colorado Department of Revenue Email Alerts to get automated reminders and updates on deadlines and tax changes.

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.

Let's Wrap it Up

You now have all the facts about Colorado’s automatic tax extension. No forms are required for the extension — just make sure at least 90% of your state taxes are paid by April 15th to avoid penalties.

Work with Our Experts!

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