Most states tax at least some types of business income derived from the state. As a rule, the details of how income from a specific business is taxed depend in part on the business's legal form. In most states corporations are subject to a corporate income tax, while income from pass-through entities such as S corporations, limited liability companies (LLCs), partnerships, and sole proprietorships is subject to a state's tax on personal income. Tax rates for both corporate income and personal income vary widely among states. Corporate rates, which most often are flat regardless of the amount of income, generally range from roughly 4% to 10%. Personal rates, which generally vary depending on the amount of income, can range from 0% (for small amounts of taxable income) to around 9% or more in some states.
Currently, six states – Nevada, Ohio, South Dakota, Texas, Washington, and Wyoming – do not have a corporate income tax. However, four of those states – Nevada, Ohio, Texas, and Washington – do have some form of gross receipts tax on corporations. Moreover, five of those states – Nevada, South Dakota, Texas, Washington, and Wyoming – as well as Alaska and Florida currently have no personal income tax. Individuals in New Hampshire and Tennessee are only taxed on interest and dividend income.
Apart from taxing business income through a corporate income tax or a personal income tax, many states impose a separate tax on at least some businesses, sometimes called a franchise tax or privilege tax. This is frequently justified as a tax simply for the privilege of doing business in the state. As with state taxes on business income, the specifics of a state's franchise tax often depend in part on the legal form of the business. Franchise taxes are generally either a flat fee or an amount based on a business's net worth.
Oklahoma has both a corporation income tax and a corporation franchise tax. Your business may be subject to one, both, or neither of these taxes depending on its legal form. Additionally, if income from your business passes through to you personally, that income will be subject to taxation on your personal state tax return.
Oklahoma's corporation income tax is a flat 6% tax on federal taxable income, with certain adjustments. Returns are due on the 15th day of the fourth month after the end of the tax year. For corporations with a tax year that corresponds to the calendar year, this means April 15th. For purposes of comparison, Oklahoma taxes personal income at a series of marginal rates ranging from 0.5% to 5.0%.
Oklahoma's corporation franchise tax applies to traditional (C-type) corporations and S corporations. The franchise tax is assessed at the rate of $1.25 per $1,000 or fraction thereof on the amount of capital allocated, invested, or employed in Oklahoma, with a $250 minimum tax and $20,000 maximum tax.
Years ago, Oklahoma temporarily replaced the franchise tax with a so-called business activity tax (BAT). However, the BAT was repealed for years after 2012.
Let's briefly look at additional details for five of the most common forms of Oklahoma business: corporations (i.e., C corporations), S corporations, LLCs, partnerships, and sole proprietorships.
Oklahoma corporations are subject to Oklahoma's corporation income tax and corporation franchise tax.
Example: For the 2018 tax year, your Oklahoma corporation had taxable income of $500,000. Also in 2018, the amount of your corporation's capital allocated, invested, or employed in Oklahoma was $250,000. Other things being equal, the corporation will owe Oklahoma corporate income tax in the amount of $30,000 (6% of $500,000). The corporation will also owe corporation franchise tax in the amount of $312.50 ($1.25 x 250).
An S corporation is created by first forming a traditional corporation, and then filing a special form with the IRS to elect S status; unlike a traditional corporation, an S corporation generally is not subject to separate federal income tax. Rather, taxable income from an S corporation is passed through to the individual shareholders, and each individual shareholder is subject to federal tax on his or her share of the corporation's income; in other words, S corporations are pass-through entities. (Note that a shareholder's share of the S corporation's income need not actually be distributed to the shareholder in order for the shareholder to owe tax on that amount.) Oklahoma recognizes the federal S election, and Oklahoma S corporations are not required to pay corporate income tax to the state. However, Oklahoma S corporations have been required to pay the franchise tax, and through the end of 2012 are required to pay the business activity tax. In addition, an individual S corporation shareholder will owe tax on his or her share of the corporation's income.
Example: For the 2018 tax year, your S corporation had net income of $500,000. Also in 2018, the amount of your corporation's capital allocated, invested, or employed in Oklahoma was $250,000. The corporation will also owe corporation franchise tax in the amount of $312.50 ($1.25 x 250). The $500,000 in net income will be allocated to you and your fellow shareholders. Each of you will pay tax on your own portion on your respective state tax returns. Each shareholder's rate will vary depending on his or her overall taxable income for the year.
Like S corporations, standard LLCs are pass-through entities and are not required to pay income tax to either the federal government or the State of Oklahoma. However, through the end of 2012, LLCs are required to pay the business activity tax. In addition, income from the business is distributed to the LLC members, and each individual member is subject to federal and state taxes on his or her share of the company's income.
Note, however, that while by default LLCs are classified for tax purposes as partnerships (or, for single-member LLCs, disregarded entities), it is possible to elect to have your LLC classified as a corporation. In that case, the LLC would be subject to Oklahoma's corporation income tax.
Example: For the 2018 tax year, your multi-member LLC, which has the default tax classification of partnership, had net income of $500,000. The $500,000 in net income will be divvied up between you and your fellow LLC members. Each of you will pay tax on your own portion on your individual state tax return. Each member's rate will vary depending on his or her overall taxable income for the year.
Income from partnerships is distributed to the individual partners, and each individual partner is subject to federal and state taxes on his or her share of the partnership's income. In addition, through the end of 2018, Oklahoma partnerships are required to pay the business activity tax.
Example: For the 2018 tax year, your partnership had net income of $500,000. The $500,000 in net income will be divvied up between you and your partners. Each of you will pay tax on your own portion on your individual state tax return. Each partner's rate will vary depending on his or her overall taxable income for the year.
Income from your business will be distributed to you as the sole proprietor, and you will pay tax to the state on that income.
Example: For the latest tax year, your sole proprietorship had net income of $100,000. The $100,000 in net income is distributed to you personally and you pay tax on that income on your individual state tax return. Your rate will vary depending on your overall taxable income for the year.
Our primary focus here is on businesses operating solely in Oklahoma. However, if you're doing business in several states, you should be aware that your business may be considered to have nexus with those states, and therefore may be obligated to pay taxes in those states. Also, if your business was formed or is located in another state, but generates income in Oklahoma, it may be subject to Oklahoma taxes. The rules for taxation of multistate businesses, including what constitutes nexus with a state for the purpose of various taxes, are complicated; if you run such a business, you should consult with a tax professional.
For further guidance on Oklahoma's corporation income tax, franchise tax, and business activity tax, visit the Oklahoma Tax Commission. Given the fact that the business activity tax recently ended, and the franchise will shortly come back into effect, you should also consider consulting with an Oklahoma tax professional for any questions regarding these two taxes. For information on business-related taxes in other states, check Nolo's 50-State Guide to Business Income Tax. And, if you're looking for detailed guidance on federal income tax issues, check Tax Savvy for Small Business, by Federick Daily (Nolo).
Updated: June 13, 2018