Colorado Business Tax Extension LLC / Partnership – S Corporation – C Corporation – Fiduciary / Estate / Trust
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Connect with a TaxPro →Colorado Business Tax Extension – LLC / Partnership
DR 0158-N • LLC / PartnershipColorado LLC & Partnership Tax Extension
Colorado LLCs and partnerships file with the Colorado Department of Revenue. Colorado provides an automatic 6-month filing extension – no separate extension form is required, and a federal extension is not a prerequisite. Your Colorado LLC return is automatically extended to October 15, 2026.
How the Extension Works
Colorado automatically grants a 6-month filing extension to LLCs and partnerships – no action is required to activate it. If your entity owes Colorado tax, submit payment with DR 0158-N by April 15, 2026. File the completed Colorado LLC or partnership return by October 15, 2026.
Best Practices
- Colorado's extension is fully automatic – no filing is needed to extend your April 15 deadline to October 15, 2026.
- Pay estimated Colorado LLC or partnership tax using DR 0158-N by April 15, 2026.
- Make payments through Revenue Online for immediate processing and a digital confirmation.
- File the completed Colorado return no later than October 15, 2026.
Working with a Tax Professional
LLC / Partnership returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Colorado return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Colorado return by October 15, 2026
How to Pay
Colorado requires online payment for tax amounts of $750 or more. Submit electronically via the Colorado Online Tax Extension Payment portal. For amounts under $750, complete DR 0158-N and mail with your payment.
Colorado Online Payment Portal
Submit electronically through the Colorado Online Tax Extension Payment system. Required for all payments $750 and above.
DR 0158-N by Check
Download DR 0158-N and mail with your check or money order. Include your EIN and tax year on the check.
1375 Sherman Street
Denver, CO 80261-0008
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
LLC / Partnership Quick Reference
| State Abbreviation | CO |
| Entity Type | LLC / Partnership |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Payment Due | April 15, 2026 (100% of tax owed) |
| Payment Form | DR 0158-N |
| Online Payment | Colorado Online Tax Extension Payment |
| State Agency | Colorado Department of Revenue |
| Failure to File Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
Colorado Business Tax Extension – S Corporation
DR 0158-N • S CorporationColorado S Corporation Tax Extension
Colorado S Corporations file with the Colorado Department of Revenue. Like other Colorado business entities, S Corporations benefit from an automatic 6-month extension – no extension form or federal extension is required. The extended deadline is October 15, 2026.
How the Extension Works
Colorado S Corporations receive an automatic 6-month extension without filing any form or obtaining a federal extension first. If a Colorado tax balance is owed, pay it using DR 0158-N by April 15, 2026. The completed S Corporation return must then be filed by October 15, 2026.
Best Practices
- Colorado's automatic extension requires no paperwork – your deadline is extended to October 15, 2026 automatically.
- Submit any Colorado S Corporation tax payment using DR 0158-N by April 15, 2026.
- Pay conveniently online through Revenue Online.
- File the completed Colorado S Corporation return by October 15, 2026.
Working with a Tax Professional
S Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Colorado return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Colorado return by October 15, 2026
How to Pay
Colorado requires online payment for tax amounts of $750 or more. Submit electronically via the Colorado Online Tax Extension Payment portal. For amounts under $750, complete DR 0158-N and mail with your payment.
Colorado Online Payment Portal
Submit electronically through the Colorado Online Tax Extension Payment system. Required for all payments $750 and above.
DR 0158-N by Check
Download DR 0158-N and mail with your check or money order. Include your EIN and tax year on the check.
1375 Sherman Street
Denver, CO 80261-0008
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
S Corporation Quick Reference
| State Abbreviation | CO |
| Entity Type | S Corporation |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Payment Due | April 15, 2026 (100% of tax owed) |
| Payment Form | DR 0158-N |
| Online Payment | Colorado Online Tax Extension Payment |
| State Agency | Colorado Department of Revenue |
| Failure to File Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
Colorado Business Tax Extension – C Corporation
DR 0158-N • C CorporationColorado C Corporation Tax Extension
Colorado C Corporations file with the Colorado Department of Revenue and are subject to Colorado corporate income tax. Colorado grants an automatic 6-month filing extension, so your C Corporation return is extended to October 15, 2026 without any additional forms or filings.
How the Extension Works
Colorado automatically extends C Corporation filing deadlines to October 15, 2026 – no extension application or federal extension is required. If Colorado corporate tax is owed, remit the estimated balance using Form DR 0158-C by April 15, 2026. File the completed Colorado C Corporation return by October 15, 2026.
Best Practices
- No extension form or federal extension is needed – Colorado C Corp deadlines are automatically extended to October 15, 2026.
- Estimate your Colorado corporate income tax and pay using Form DR 0158-C by April 15, 2026.
- Use Revenue Online for fast, electronic payment with immediate confirmation.
- File the completed Colorado C Corporation return by the October 15, 2026 extended deadline.
Working with a Tax Professional
C Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Colorado return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Colorado return by October 15, 2026
How to Pay
Colorado requires online payment for tax amounts of $750 or more. Submit electronically via the Colorado Online Tax Extension Payment portal. For amounts under $750, complete DR 0158-N and mail with your payment.
Colorado Online Payment Portal
Submit electronically through the Colorado Online Tax Extension Payment system. Required for all payments $750 and above.
DR 0158-N by Check
Download DR 0158-N and mail with your check or money order. Include your EIN and tax year on the check.
1375 Sherman Street
Denver, CO 80261-0008
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
C Corporation Quick Reference
| State Abbreviation | CO |
| Entity Type | C Corporation |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Payment Due | April 15, 2026 (100% of tax owed) |
| Payment Form | DR 0158-N |
| Online Payment | Colorado Online Tax Extension Payment |
| State Agency | Colorado Department of Revenue |
| Failure to File Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
Colorado Business Tax Extension – Fiduciary / Estate / Trust
DR 0158-N • Fiduciary / Estate / TrustColorado Fiduciary Tax Extension
Colorado estates and trusts with Colorado-source income file with the Colorado Department of Revenue. Colorado's automatic 6-month extension applies to fiduciary returns as well – no state form or federal extension is required to extend to October 15, 2026.
How the Extension Works
Colorado fiduciary returns receive an automatic 6-month extension to October 15, 2026 without any filing. If the estate or trust owes Colorado income tax, pay using Form DR 0105EP by April 15, 2026. File the completed Colorado fiduciary return by October 15, 2026.
Best Practices
- No extension filing is needed – Colorado automatically extends fiduciary deadlines to October 15, 2026.
- Pay estimated Colorado fiduciary income tax using Form DR 0105EP by April 15, 2026.
- Remit payment electronically through Revenue Online for fast processing and a digital payment record.
- File the completed Colorado fiduciary return by October 15, 2026.
Working with a Tax Professional
Fiduciary / Estate / Trust returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Colorado return is filed accurately and on time.
- Get matched with a verified U.S.-based CPA or Enrolled Agent
- Upload your business documents via secure drag-and-drop
- Review your return with transparent, upfront pricing
- Your TaxPro files the Colorado return by October 15, 2026
How to Pay
Colorado requires online payment for tax amounts of $750 or more. Submit electronically via the Colorado Online Tax Extension Payment portal. For amounts under $750, complete DR 0158-N and mail with your payment.
Colorado Online Payment Portal
Submit electronically through the Colorado Online Tax Extension Payment system. Required for all payments $750 and above.
DR 0158-N by Check
Download DR 0158-N and mail with your check or money order. Include your EIN and tax year on the check.
1375 Sherman Street
Denver, CO 80261-0008
Late Filing & Payment Penalties
| Penalty Type | Amount |
|---|---|
| Failure to File | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
Fiduciary / Estate / Trust Quick Reference
| State Abbreviation | CO |
| Entity Type | Fiduciary / Estate / Trust |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Payment Due | April 15, 2026 (100% of tax owed) |
| Payment Form | DR 0158-N |
| Online Payment | Colorado Online Tax Extension Payment |
| State Agency | Colorado Department of Revenue |
| Failure to File Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
| Failure to Pay Penalty | Greater of: 12% of tax due; 5% for first month plus 0.5% each additional month; or $5 |
Extended? Your Colorado Business Return Deadline Is Coming Up.
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