Oklahoma Business Personal Property Tax: Form 901 Due March 15, Inventory Rules and Penalties

Many new owners assume that because Oklahoma has no general state business license and no franchise tax, there is no other annual filing to worry about. That is not the case. The oklahoma business personal property tax reaches the equipment, fixtures and inventory a business holds in a county. Every business with taxable assets files a return with the county assessor by March 15, even if it expects to owe nothing.

This guide covers what goes on the return, how inventory is reported, when the freeport exemption applies, and what late filing costs. It is informational content, not legal or tax advice. Property tax treatment depends on your specific assets and locations, so confirm your filing with your county assessor, and consult a qualified CPA or attorney if your situation is complicated.

What Oklahoma Taxes as Business Personal Property

Business personal property is tangible property you own and use or hold for your business. The types most businesses report include:

• Furniture and fixtures
• Machinery and equipment
• Computers
• Tools and dies
• Leasehold improvements
• Inventory, unless the freeport exemption applies

The valuation date is January 1. Taxable property located in the county on January 1 goes on that year's return. Selling equipment in February does not remove it from that return, because the valuation date is January 1. Equipment you buy in July 2026 first appears on the return due March 15, 2027.

Some property is outside the tax. Intangible assets are exempt under State Question 766, approved in 2012. Motor vehicles and cargo trailers are not subject to the business personal property tax.

Form 901: The Business Personal Property Return

The return is the Business Personal Property Return, OTC Form 901, and you file it with the county assessor. The key rules are:

• Every business files, including businesses that expect an exemption to cover everything they own. Claiming an exemption does not replace the return.
• File a separate return for each location.
• The return is signed under penalty of perjury, so the figures must be accurate and complete.
• The deadline is March 15. Late-filing penalties are covered below.

The Oklahoma County Assessor's instruction sheet cites 68 O.S. 2902.2 for the filing requirement. To prepare your return, work through these steps:

1. Get the current Form 901 from your county assessor or from the Oklahoma Tax Commission at oklahoma.gov/tax.
2. List every taxable asset at each location as it stood on January 1, including inventory.
3. Value the assets using the OTC's annual Business Personal Property Valuation Schedule. The 2026 edition is published on oklahoma.gov/tax.
4. Ask your county assessor whether it wants the OTC's Form 904-3, General Asset Listing, to accompany your Form 901.
5. Report inventory as an average, as explained in the next section.
6. Sign the return and file it by March 15.

How Inventory Is Reported

Inventory is taxable in Oklahoma unless it qualifies for the freeport exemption. You do not report a single count from one day. You report inventory as an average, using one of these methods:

• Beginning inventory plus ending inventory, divided by two.
• A 12-month average of inventory values.

For example, suppose a hardware store had $80,000 in inventory at the start of the year and $60,000 at the end. Using the first method, its reported inventory value is $70,000, the average of the two figures. These numbers are illustrative only. Confirm with your county assessor which averaging approach it accepts.

The Freeport Exemption

The freeport exemption under Article X, Section 6A of the Oklahoma Constitution is narrow. It covers two categories of goods:

• Goods in interstate transit.
• Goods held no more than nine months for assembly, storage or manufacturing.

Qualifying inventory is exempt only if you apply each year. The freeport application is due on or before March 15, or within 30 days of a notice of valuation increase, whichever is later. A claim from a prior year is void, so a business that claimed freeport last year must apply again. Filing Form 901 by itself does not claim the exemption. Get the freeport application form from your county assessor.

Goods held longer than nine months, such as slow-moving stock sitting in a warehouse, do not qualify. They stay on the return at their averaged value.

Common Mistakes That Cost Businesses Money

• Assuming inventory is exempt because it will be sold. Inventory is taxable unless the narrow freeport exemption applies.
• Skipping the return because you expect to owe little or nothing. The return is required regardless.
• Filing one return for a business with several locations. Each location gets its own return.
• Relying on last year's freeport approval. Prior-year claims are void, so you must apply again each year.
• Forgetting the January 1 snapshot. Property you sold or moved after January 1 is generally still reported for that year, while property you bought after January 1 is not.

Penalties for Late Filing

The county applies two late-filing penalties:

Filing status	Penalty
Return not filed by March 15	10 percent
Return not filed by April 15	20 percent

The Oklahoma County Assessor cites 68 O.S. 2836C for these penalties. Ask your county assessor whether the two penalties stack, what base they apply to and how they are calculated before you estimate what a late filing would cost, and file by March 15 whenever possible.

How the Tax Is Calculated

The tax is levied through the county treasurer's mill levy. The levy varies by county and by taxing district, so the rate that applies to your business depends on where it is located. Check with your county assessor for the current levy in your district.

New manufacturers may be able to apply for a five-year ad valorem exemption using Form 900-XM. This guide does not summarize the eligibility rules or the approval process, so confirm both with your county assessor before relying on the exemption.

State Question 847 on the November 2026 Ballot

State Question 847 is on the November 3, 2026 ballot. It would lower the assessment cap for commercial real property from 5 percent to 4 percent beginning in 2027. The measure addresses real property, not the business personal property return covered in this guide. Check the result after the election, and ask your county assessor how any change would affect your filings.

Related Filings Are Separate

The property return does not replace your other business obligations. Each has its own deadline and fee:

• Articles of Organization for an LLC: $100, filed with the Oklahoma Secretary of State.
• LLC Annual Certificate: $25, due on the anniversary of the Articles of Organization filing, with a 60-day grace period. The statute sets no late fee, but an LLC that misses the 60 days ceases to be in good standing.
• Sales tax permit from the Oklahoma Tax Commission: $20 for three years, obtained through OkTAP. You need it if you collect sales tax.

Oklahoma repealed its franchise tax for tax year 2024 and later, so you will not see a franchise tax line on your filings.

Next Steps

1. Mark March 15 on your calendar, and list every location where you hold taxable property as of January 1.
2. Pull the current Form 901 and the 2026 valuation schedule from oklahoma.gov/tax.
3. If you hold qualifying inventory, request the freeport application from your county assessor and file it on time.
4. Call your county assessor to confirm the mill levy for your district and any local procedures.
5. If you need help with planning or recordkeeping, the Oklahoma Small Business Development Center network can point you to resources.

Disclaimer: This article is informational content for general education. It is not legal, tax or accounting advice, and it does not create an attorney-client or accountant-client relationship. Oklahoma property tax rules, levies and deadlines can change, so confirm current requirements with your county assessor and the Oklahoma Tax Commission, and consult a qualified CPA or attorney before making filing decisions.