Oklahoma · LLC tax election
Oklahoma LLC: S corp or C corp?
Oklahoma's income tax rate is low, but its franchise tax on capital is the line item that decides this one.
See Oklahoma at a glanceShort answer
In Oklahoma a C corporation pays a flat 4% corporate income tax, and S corporations file Form 512-S. Corporations also pay a franchise tax of $1.25 per $1,000 of capital used in Oklahoma, a cost an LLC taxed as a partnership may avoid.
Last checked .Oklahoma at a glance
What is different about Oklahoma?
Oklahoma's corporate income tax is a flat 4% of taxable income, per the Tax Commission's current estimated-tax form. So a C corporation here is not expensive on income. The cost people overlook is the franchise tax: corporations doing business in Oklahoma are taxed $1.25 for each $1,000 of capital invested or used in the state. That charge is written for corporations, so electing corporate tax treatment is the step that can bring it in. Federal S corporations file Form 512-S, and the state also withholds on nonresident owners. Run the franchise number on your own capital before you decide.
Does Oklahoma recognize a federal S corp election?
Oklahoma recognizes federal S corporations. The Tax Commission's instructions say a corporation with a federal S election that files Form 1120-S must file Oklahoma Form 512-S rather than the standard corporation return, so there is no separate state election. The franchise tax of $1.25 per $1,000 of capital invested or used in Oklahoma is written for corporations, so it is the number to price before electing.
Does my LLC need a separate Oklahoma election or form?
Oklahoma has no separate S election: a corporation with a federal S election that files Form 1120-S files Oklahoma Form 512-S.2
What does Oklahoma tax an S corp or LLC at the entity level?
- Oklahoma charges corporations a franchise tax of $1.25 for each $1,000 of capital invested or used in the state.5
Is a Oklahoma LLC taxed as a C corp ever better?
An Oklahoma C corporation pays a flat 4% of taxable income, per the Tax Commission's 2026 estimated-tax form. Corporations that do business in Oklahoma also pay franchise tax at $1.25 for each $1,000 of capital invested or used in the state. Returns are due 30 days after the federal due date. The owners are taxed again when profit is paid out as dividends.
Run your Oklahoma numbers
The 4% rate is low, so Oklahoma does not punish C corporation income the way a high-rate state would. S status pays when the owner can avoid double taxation and cut self-employment tax with a fair salary. Price the franchise tax on your capital before assuming the corporate route is cheaper than staying an LLC.
Result
How much would a Oklahoma LLC owner save as an S corp?
| Taxed as | At $80,000 profit | At $150,000 profit |
|---|---|---|
| Default LLC | $11,304self-employment tax $11,304 | $21,194self-employment tax $21,194 |
| S corp | $9,344payroll tax $7,344 + $2,000 payroll and prep | $15,770payroll tax $13,770 + $2,000 payroll and prep |
| C corp | $17,075payroll tax $7,344 + Oklahoma tax $1,280 + federal $6,451 + $2,000 payroll and prep | $30,266payroll tax $13,770 + Oklahoma tax $2,400 + federal $12,096 + $2,000 payroll and prep |
Assumes a 60% salary7 and a single filer. Income tax is left out. C corp dividends are taxed again. Oklahoma entity-level taxes are not included: we could not confirm them on an official Oklahoma source.
When is the Form 2553 deadline for a Oklahoma LLC, and what if I miss it?
Late relief: federal steps, deadline guide.
What to do next
How to start one, or have us form it from $123.75.
Registered agent $74.25/yr, annual report.
LLC vs S corp guide, election deadline, Form 2553 filed for $165.
More on Oklahoma: How to start a Oklahoma LLC · How to start a Oklahoma corporation · Oklahoma LLC cost · Oklahoma annual report · Annual report late fees by state
File the S-Corp Election for your Oklahoma LLC
We file Form 2553 for a flat $165.
Get the S-Corp ElectionCommon questions
What is Oklahoma's corporate income tax rate?
It is a flat 4% of taxable income, according to the Oklahoma Tax Commission's 2026 estimated tax form.
What form does an Oklahoma S corporation file?
Form 512-S. The Oklahoma Tax Commission's instructions say a corporation with a federal S election that files Form 1120-S must file Form 512-S instead of the standard corporation return, so the federal election carries over.
Does Oklahoma charge a franchise tax?
Yes. Oklahoma levies a franchise tax on corporations doing business in the state at $1.25 for each $1,000 of capital invested or used in Oklahoma. The tax commission page describes it as a tax on corporations, so price it before electing.
When is an Oklahoma corporate return due?
No later than 30 days after the due date set under the Internal Revenue Code, per the Oklahoma Tax Commission's corporation filing instructions. Every corporation doing business in or deriving income from Oklahoma files, whether or not tax is due.
Sources 8 links, checked Nov 6, 2026
- Oklahoma recognizes federal S corporations and has them file Form 512-S instead of the standard corporation return. oklahoma.gov, checked Nov 6, 2026
- Oklahoma has no separate S election: a corporation with a federal S election that files Form 1120-S files Oklahoma Form 512-S. oklahoma.gov, checked Nov 6, 2026
- Oklahoma's corporate income tax rate is a flat 4% of taxable income, per the Tax Commission's 2026 estimated-tax form. oklahoma.gov, checked Nov 6, 2026
- Oklahoma taxes individuals; for tax year 2026 its brackets are 0.0%, 2.5%, 3.5% and 4.5% of taxable income. oklahoma.gov, checked Nov 6, 2026
- Oklahoma charges corporations a franchise tax of $1.25 for each $1,000 of capital invested or used in the state. oklahoma.gov, checked Nov 6, 2026
- IRS: Form 1120 instructions, C corp rate irs.gov, checked Nov 6, 2026
- IRS: S corp reasonable compensation irs.gov, checked Nov 6, 2026
- IRS: Form 2553 instructions irs.gov, checked Nov 6, 2026
Last verified Nov 6, 2026.
This page explains the rules; it is not tax advice. Run your numbers with a CPA or enrolled agent before you elect.
Last verified Nov 6, 2026.