You can request a tax extension if you need more time to file your Oklahoma income taxes.

The Oklahoma Tax Commission allows up to six additional months to file, providing individuals and businesses with the flexibility to meet their obligations without undue pressure.

However, this extension does not give you more time to pay any taxes owed.

This guide covers everything you need to know about Oklahoma tax extensions, including deadlines, requirements, and filing instructions.

Why File an Oklahoma Tax Extension?

Filing a tax extension gives you more time to ensure your return is accurate and complete. This is particularly helpful if:

• You’re waiting on key financial documents.
• Your tax situation is complex and requires additional time.
• You’ve already filed a federal extension and need state alignment.

However, it’s important to remember that a tax extension only extends the time to file, not the time to pay. Any unpaid balance may be subject to penalties and interest.

How to File an Oklahoma Tax Extension

For Individuals

1. File Form 504-I if no federal extension was submitted or if additional payment is owed.
2. If you filed Form 4868 for a federal extension, Oklahoma honors it automatically.
3. Pay Electronically: Use the Oklahoma Tax Commission’s portal to make your payment and retain the confirmation number for your records.
4. Mail Your Payment: If paying by mail, send Form 504-I with your check to Oklahoma Tax Commission, P.O. Box 26890, Oklahoma City, OK 73126-0890.

For Businesses

1. File Form 504-C by the original deadline if no federal extension was submitted.
2. Automatic Corporate Extensions: Oklahoma grants an automatic extension if the federal Form 7004 was filed.
3. Pay Required Amounts: 90% of the tax liability must be paid by May 15.

Eligibility and Requirements

• Oklahoma relies on Federal Form 4868 for state tax extensions. If your federal extension is approved, your Oklahoma extension is automatically granted as long as no tax is due.
• If your federal extension is denied, you must file Form 504-I for individuals or Form 504-C for businesses.
• Active-duty military members serving outside the U.S. are granted an automatic extension without filing.
• To qualify for the extension, you must pay at least 90% of your tax liability by April 15th.

Penalties for Missing the Deadline

• Late Filing Penalty: 5% of the unpaid tax if filed after the extended due date.
• Late Payment Penalty: 1.25% interest per month on unpaid taxes.
• Tip: Even if you can’t pay in full, filing helps reduce penalties.

Revenue Insights: Where Do Your Taxes Go?

Oklahoma Revenue Distribution by Major Function (2024 Fiscal Year)

• General Revenue Fund (63%): Pays for essential services like healthcare, public safety, and government operations.
• Other Programs (24%): Includes infrastructure improvements and local initiatives.
• Schools and Teacher Retirement (7%): Supports education and retirement plans.
• State and County Roads (6%): Maintains and improves transportation infrastructure.

Oklahoma Revenue by Major Sources (2024 Fiscal Year)

• Individual Income Tax: $6.13 billion
• Sales and Use Taxes: $2.99 billion
• Gross Production Taxes: $1.08 billion
• Motor Vehicle Taxes: $0.37 billion
• Corporate Income Tax: $0.05 billion
• Other Sources: $0.28 billion

Frequently Asked Questions

Do I Need to File a Separate State Extension?

You do not need to file a separate Oklahoma extension if you have an approved federal extension and no tax is due.

What Happens If I Can’t Pay My Taxes by April 15th?

File your extension and pay as much as you can. You may still face interest and penalties on the unpaid balance, but filing will help you avoid higher late filing penalties.

Are Military Members Automatically Granted Extensions?

Yes. Active-duty military members serving outside the U.S. receive an automatic extension until the 15th day of the third month after returning to the U.S. or leaving the hospital.

What Are the Penalties for Late Filing?

Late filings are penalized with 5% of the unpaid tax. Additionally, unpaid balances are subject to interest of 1.25% per month.

Can Businesses Use the Federal Extension?

Yes. If a federal extension is filed, Oklahoma will honor it. However, if additional payment is due, file Form 504-C to avoid penalties.

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