Corporate Income Tax by State in 2026: Rates and the Tax on $1 Million in Every US State

We ran this site's corporate tax calculator for every US state at three levels of state taxable income: $100,000, $1,000,000 and $10,000,000. The calculator applies each state's 2026 corporate income tax schedule, whether flat, graduated or set by the size of the income, to the income you enter, with no credits.

Two things to know about what "taxable income" means here:

• It's already apportioned. A company that sells in many states doesn't pay each state on its whole profit. Each state taxes a share, usually based on where sales happen. Our figures assume the full amount is apportioned to the one state, which is the right way to compare rates but not how a multistate company's bill works.
• It's after state adjustments. States start from federal taxable income and then add and subtract items. We skip that step and treat the number as the final base.

The rates come from the state corporate tax table behind the calculator, which was compiled from state revenue departments and legislation. Mississippi's brackets come from its latest published corporate instructions, which are for 2025, because the 2026 corporate schedule hadn't been published when the table was checked.

Sort by any column. States that tax receipts or margin show zero, because the calculator doesn't compute those taxes, not because the business owes nothing.

32 states use a single flat rate, so the effective rate is the same whether you earn $100,000 or $10,000,000. 10 use graduated brackets, where each slice of income is taxed at its own rate. In most of those the top bracket starts well below $1,000,000, so a company earning $1 million pays the top rate on most of it.

New Jersey and New York work differently. The size of the income picks one rate, and that rate applies to all of it, so the bill jumps when income crosses a threshold. New York charges 6.50%, or 7.25% once the business income base is over $5,000,000: $65,000.00 on $1 million and $725,000.00 on $10,000,000.

New Jersey charges 9.00% of the whole base once income is over $100,000. Its top rate of 11.50% is the highest of any state, but it applies only once taxable income is over $10,000,000, when the 2.50% Corporate Transit Fee is added on the whole base. On $1 million New Jersey charges $90,000.00, at exactly $10,000,000 it charges $900,000.00, and on $20,000,000 it charges $2,300,000.00.

North Carolina stands out at the bottom. Its rate of 2.00% produces $20,000.00 on $1 million, a fraction of what most states charge.

Averaged across all 50 states, including the ones that charge nothing, the state corporate income tax is $5,226.74 on $100,000, $55,495.68 on $1,000,000 and $565,479.68 on $10,000,000. Among only the states that tax corporate income, the median on $1 million is $63,647.50.

Corporate income tax is only part of what a business pays a state. Several states tax revenue rather than profit, and that changes who pays more. A gross receipts tax hits a low-margin business hard, because it's owed even when profit is thin.

Here's what our verified state profiles confirm:

• Delaware has a corporate income tax of 8.70%, which is $87,000.00 on $1 million. It also has no sales tax. Instead, businesses pay a gross receipts tax on what they sell, at rates from 0.0945% to 1.9914% depending on the type of business.
• New Mexico taxes corporate income at a flat 5.90%, and separately levies a gross receipts tax that replaces a retail sales tax. The state portion is 4.875%, and local add-ons bring the combined rate as high as 10.8125%. It's imposed on the business, though it's usually passed on to customers.
• South Dakota states in its own tax guide that it has no corporate, unitary or personal income tax.

For Nevada, Ohio, Texas and Washington, our state tax table records that the state taxes gross receipts or margin instead of income, but we don't have verified rates for those taxes in our state profiles, so we don't quote them here. A business in any of those four states will owe state business tax. It just isn't the tax in this table.

The corporate tax calculator is a rate comparison, not a full return. It doesn't include:

• Minimum taxes and franchise taxes based on capital or net worth, which several states charge regardless of profit. Delaware's annual franchise tax is one example.
• Local business taxes, such as those in New York City and Philadelphia.
• Surtaxes other than New Jersey's Corporate Transit Fee, and credits, net operating losses and combined reporting rules.
• Pass-through businesses. S corporations, partnerships and LLCs are usually taxed on the owners' personal returns, so these rates don't apply to them.

Each state has its own page with the details, such as the California corporate tax calculator, the New Jersey corporate tax calculator and the North Carolina corporate tax calculator. Enter your apportioned income and any credits to see your bill.