The United States operates a two-tier corporate tax system where businesses pay taxes at both the federal and state level. At the federal level, C-Corporations pay a flat 21% tax on net income, established by the Tax Cuts and Jobs Act of 2017. At the state level, corporate tax rates range from 0% in states like Wyoming and Nevada to 11.5% in New Jersey, creating combined effective rates that vary dramatically depending on where a business operates.
Understanding the full corporate tax landscape is essential for every business owner and entrepreneur operating in the US. The choices you make about entity structure, state of incorporation, and tax planning strategies can result in effective tax rate differences of 10 percentage points or more. This guide covers the federal corporate tax rate, state-by-state corporate tax rates, the interaction between federal and state taxes, estimated quarterly payment requirements, and strategic considerations for minimizing your overall tax burden.
Federal Corporate Tax Rate
The federal corporate income tax rate is a flat 21%. This rate applies uniformly to all C-Corporations regardless of income level. Prior to the Tax Cuts and Jobs Act of 2017, the US had a graduated corporate rate structure with a top rate of 35%, which was one of the highest in the developed world. The reduction to 21% brought the US rate closer to the OECD average.
Key characteristics of the federal corporate tax:
- Flat rate: 21% on all taxable income (no brackets or graduated rates)
- Worldwide income: US corporations are taxed on worldwide income, with foreign tax credits available to avoid double taxation
- Fiscal year flexibility: Corporations can choose a fiscal year end other than December 31
- Net operating losses: Can be carried forward indefinitely but can only offset 80% of taxable income in any given year
- Alternative Minimum Tax (AMT): The corporate AMT was repealed by the TCJA in 2017, but the Inflation Reduction Act of 2022 introduced a new 15% corporate AMT on adjusted financial statement income for corporations with average annual income exceeding $1 billion
The 21% federal rate applies only to C-Corporations. Pass-through entities (LLCs taxed as partnerships or sole proprietorships, S-Corporations, and partnerships) do not pay corporate tax. Instead, their income passes through to the owners' personal tax returns and is taxed at individual rates ranging from 10% to 37%. For a detailed comparison of how different entity types are taxed, see our guide to LLC vs C-Corp vs S-Corp.
State Corporate Tax Rates
State corporate taxes add a second layer of taxation that significantly affects the total tax burden. Here are the corporate tax rates for all 50 states plus the District of Columbia.
States with No Corporate Income Tax
| State | Alternative Business Tax | Notes |
|---|---|---|
| Nevada | Commerce Tax (0.051%-0.331% of gross revenue over $4M) | No corporate or individual income tax |
| Ohio | Commercial Activity Tax (0.26% of gross receipts over $150K) | Gross receipts tax replaces income tax |
| South Dakota | None | No corporate or individual income tax |
| Texas | Franchise Tax (0.375%-0.75% of margin) | Applies to businesses over $2.47M revenue |
| Washington | Business & Occupation Tax (0.13%-3.3% of gross income) | No corporate or individual income tax |
| Wyoming | None | No corporate or individual income tax |
States by Corporate Tax Rate (Selected Major States)
| State | Corporate Tax Rate | Notes |
|---|---|---|
| North Carolina | 2.5% | Lowest traditional corporate rate; decreasing annually |
| Colorado | 4.55% | Flat rate |
| Arizona | 4.9% | Flat rate |
| Utah | 4.85% | Flat rate |
| Florida | 5.5% | 5.5% on income over $50,000 |
| Georgia | 5.75% | Flat rate |
| Virginia | 6.0% | Flat rate |
| Michigan | 6.0% | Corporate Income Tax |
| Massachusetts | 8.0% | Flat rate |
| New York | 6.5%-7.25% | Rate depends on income; surcharge for large corps |
| California | 8.84% | Plus $800 minimum franchise tax |
| Pennsylvania | 8.99% | Being reduced over several years |
| Illinois | 9.5% | 7% income tax + 2.5% replacement tax |
| Minnesota | 9.8% | One of the highest rates |
| New Jersey | 9.0%-11.5% | 11.5% on income over $1M (surcharge) |
When evaluating state corporate tax rates, consider the full picture beyond the headline rate. Some states with zero income tax impose alternative business taxes (gross receipts, franchise, or commercial activity taxes) that can be more burdensome than a traditional income tax for low-margin businesses. A 0.75% franchise tax on gross revenue in Texas can exceed what a company would pay under a 5% income tax if profit margins are thin. Always model your specific financial projections against the actual tax structure of each state.
Combined Federal and State Tax Rates
The combined effective corporate tax rate varies significantly by state:
| State | State Rate | Federal Rate | Combined Rate (Before SALT Deduction) | Effective Combined Rate (After SALT Deduction) |
|---|---|---|---|---|
| Wyoming | 0% | 21% | 21.0% | 21.0% |
| South Dakota | 0% | 21% | 21.0% | 21.0% |
| North Carolina | 2.5% | 21% | 23.5% | 23.0% |
| Florida | 5.5% | 21% | 26.5% | 25.8% |
| California | 8.84% | 21% | 29.84% | 28.9% |
| New York | 7.25% | 21% | 28.25% | 27.5% |
| New Jersey | 11.5% | 21% | 32.5% | 31.1% |
The effective combined rates in the final column account for the fact that state taxes paid are deductible on the federal return, which reduces the total burden somewhat. The formula for the effective combined rate is: Federal Rate + State Rate - (Federal Rate x State Rate).
SALT Deduction for Businesses
State and Local Tax (SALT) deductions allow businesses to deduct state and local taxes paid from their federal taxable income. For C-Corporations, there is no cap on the SALT deduction -- corporations can deduct all state and local taxes paid. This is a significant advantage over individual taxpayers, who face a $10,000 SALT deduction cap under the Tax Cuts and Jobs Act.
This unlimited SALT deduction for corporations means that the true cost of state corporate taxes is reduced by the federal tax rate. If a corporation pays $100,000 in state income tax, it can deduct that amount from federal taxable income, saving $21,000 in federal taxes. The net cost of the state tax is therefore $79,000, not $100,000.
Many states have adopted SALT cap workaround programs (pass-through entity taxes or PTE taxes) that allow S-Corps and partnerships to pay state taxes at the entity level, effectively bypassing the $10,000 individual SALT cap. Check whether your state offers such a program if you operate as a pass-through entity.
Estimated Quarterly Tax Payments
C-Corporations that expect to owe $500 or more in federal income tax must make estimated quarterly payments throughout the tax year. The payment schedule for calendar-year corporations is:
| Payment | Due Date | Minimum Payment |
|---|---|---|
| 1st Quarter | April 15 | 25% of estimated annual tax |
| 2nd Quarter | June 15 | 25% of estimated annual tax |
| 3rd Quarter | September 15 | 25% of estimated annual tax |
| 4th Quarter | December 15 | 25% of estimated annual tax |
To avoid underpayment penalties, corporations must pay at least the lesser of:
- 100% of the current year's tax liability (in equal quarterly installments)
- 100% of the prior year's tax liability (not available if prior year showed a loss or prior year return covered fewer than 12 months)
Large corporations (those with $1 million or more in taxable income in any of the three preceding years) can only use the prior year's tax liability for the first installment. Subsequent installments must be based on the current year's actual income.
Underpayment penalties are calculated on a quarter-by-quarter basis using the federal short-term rate plus 5 percentage points. While the penalty rate may seem modest, it adds up quickly on large underpayments. Many businesses work with their accountant to create a quarterly tax projection model that updates throughout the year as actual financial results come in. This proactive approach prevents both underpayment penalties and the cash flow surprise of a large year-end tax bill.
State estimated tax requirements vary but generally follow a similar quarterly schedule. Most states that impose corporate income tax require estimated payments if the expected tax liability exceeds a threshold (typically $500 to $1,000).
Tax Planning Strategies
Timing Income and Deductions
Corporations can manage their tax liability by timing when income is recognized and deductions are taken. Accelerating deductions into the current year (such as prepaying expenses or making equipment purchases before year-end) reduces current-year taxable income. Deferring revenue recognition (where legally permissible) to the following year pushes the associated tax liability forward.
Section 199A / QBI Deduction
While C-Corps do not qualify for the QBI deduction, pass-through entities can deduct up to 20% of qualified business income. For business owners choosing between C-Corp and pass-through status, the QBI deduction can significantly reduce the effective tax rate of pass-through income. See our tax deductions guide for details.
State Tax Optimization
Businesses operating in multiple states can reduce their overall state tax burden through legitimate state tax planning. Strategies include:
- Locating operations in states with lower tax rates where business reasons support the decision
- Properly allocating and apportioning income across states based on sales, payroll, and property factors
- Taking advantage of state-specific tax credits and incentives (see our guide to state tax incentives)
- Utilizing holding company structures in favorable jurisdictions (such as Delaware or Nevada) for intellectual property or real estate holdings
Research and Development Tax Credit
The federal R&D tax credit (Section 41) provides a credit of up to 20% of qualified research expenses above a base amount. For small businesses (less than $5 million in gross receipts and in their first five years), up to $250,000 per year of the R&D credit can be applied against payroll taxes rather than income taxes. Many states offer additional R&D tax credits.
Depreciation Strategies
Bonus depreciation and Section 179 expensing allow businesses to accelerate the deduction of capital expenditures. Bonus depreciation is being phased down (80% in 2023, 60% in 2024, 40% in 2025, 20% in 2026). Section 179 allows full expensing of qualifying equipment up to approximately $1.22 million (2026 estimate). These provisions can create significant tax savings in years with large capital expenditures.
International Tax Considerations
US corporations are subject to tax on worldwide income. The international tax regime includes several provisions that affect businesses with foreign operations or foreign ownership:
Global Intangible Low-Taxed Income (GILTI): US shareholders of controlled foreign corporations must include GILTI in their income, with a reduced tax rate and partial foreign tax credit.
Base Erosion and Anti-Abuse Tax (BEAT): Applies to large multinational corporations with base erosion payments exceeding certain thresholds.
Foreign Tax Credits: Taxes paid to foreign governments can be credited against US tax liability to prevent double taxation, subject to limitations.
Transfer Pricing: Transactions between related parties in different countries must be conducted at arm's length prices, with extensive documentation requirements.
For foreign entrepreneurs considering US operations, understanding these international provisions is essential for proper tax planning. The interaction between US taxes and your home country's tax system will determine the overall tax efficiency of your US operations.
Filing Requirements and Deadlines
| Entity Type | Tax Form | Filing Deadline | Extension |
|---|---|---|---|
| C-Corporation | Form 1120 | April 15 (calendar year) | 6-month extension (October 15) |
| S-Corporation | Form 1120-S | March 15 (calendar year) | 6-month extension (September 15) |
| Partnership/Multi-member LLC | Form 1065 | March 15 (calendar year) | 6-month extension (September 15) |
| Single-member LLC | Schedule C (with Form 1040) | April 15 | 6-month extension (October 15) |
Filing an extension extends only the deadline to file the return, not the deadline to pay taxes owed. All taxes must still be paid by the original due date to avoid interest and penalties. Many businesses file extensions routinely to allow more time for accurate preparation, but they must estimate and pay their tax liability by the original deadline. Interest on late payments accrues from the original due date regardless of any extension.
For comprehensive information on available deductions to reduce your taxable income, see our small business tax deductions guide. For information on sales tax obligations, which are separate from income tax, see our sales tax guide.
Entrepreneurs comparing US corporate tax rates with other jurisdictions should review our tax guides for the United Kingdom, Singapore, UAE/Dubai, and Estonia to evaluate the relative tax burden of operating in different countries.
Frequently Asked Questions
What is the US federal corporate tax rate in 2026?
The federal corporate tax rate is a flat 21%, set by the Tax Cuts and Jobs Act of 2017. This applies to all C-Corporations regardless of income level. There is no graduated rate structure for corporations. Pass-through entities such as LLCs and S-Corps do not pay corporate tax; instead, their income passes through to the owners' personal returns.
Which states have no corporate income tax?
Six states have no corporate income tax: Wyoming, South Dakota, Nevada, Ohio (no traditional corporate income tax but has a gross receipts tax), Washington (no income tax but has a business and occupation tax), and Texas (no income tax but has a franchise/margin tax). Several other states offer very low rates that may be effectively zero for small businesses.
When are quarterly estimated tax payments due?
C-Corps must make estimated tax payments if they expect to owe $500 or more in tax. Payments are due on the 15th of the 4th, 6th, 9th, and 12th months of the fiscal year. For calendar-year corporations, this means April 15, June 15, September 15, and December 15. Underpayment penalties apply if payments are insufficient.
How does state corporate tax affect my total tax rate?
State corporate taxes are added on top of the 21% federal rate. State rates range from 0% in states like Wyoming and Nevada to 11.5% in New Jersey. The combined effective rate for a corporation in New Jersey could be approximately 30.5%. However, state taxes paid are deductible on the federal return, which reduces the effective combined rate somewhat.