Tax Bracket vs Corporate Income Tax
Tax Bracket and Corporate Income Tax are two Public Finance & Taxation concepts in AP Economics that students often mix up. A tax bracket is a range of income taxed at a particular rate within a progressive income-tax system. A corporate income tax is a tax on a company's profits, that is, on revenue minus deductible costs, rather than on its sales or its assets. Here is how they compare side by side.
As income rises into higher brackets, only the income within each bracket is taxed at that bracket's rate, not all income. This is why moving into a higher bracket never lowers your after-tax income.
The corporate income tax applies to profit, so a firm subtracts wages, materials, interest and depreciation from revenue before the rate is applied; a firm with a loss owes nothing. Because a corporation is a legal entity rather than a person, the tax is ultimately paid by people: shareholders through lower after-tax returns, workers through lower wages, and customers through higher prices. Economists disagree about how that burden splits, and the answer depends on how mobile capital is across borders. When profits are taxed again as dividends or capital gains in shareholders' hands, the result is called double taxation. A corporate income tax is not a sales tax; it is charged on the margin between revenue and costs, not on each transaction.
Tax Bracket vs Corporate Income Tax: A Band on a Personal Schedule Against a Tax on Company Profit
| Tax Bracket | Corporate Income Tax | |
|---|---|---|
| Who the taxpayer is | An individual, taxed on income as it arrives | The company, treated as a taxpayer separate from its owners |
| What is taxed | Taxable income, with no deduction for the cost of living | Profit, meaning revenue minus deductible costs, not sales and not assets |
| Shape of the schedule | Several bands, each rate charged only on the slice inside it | Usually one rate charged on the whole profit |
| How many times the money is taxed | Once, in the year it is received | Potentially twice, at the company and again on the dividend in the owner's bands |
| Where a small business lands | A sole proprietorship or partnership is taxed here, in the owner's bands | Reaches only firms taxed as separate entities |
| Who ends up bearing it | The person whose income it is | Divided among shareholders, workers and customers, and genuinely disputed |
| A year with a loss | No income, no band, nothing owed | Often carried forward to shelter profit in a later year |
The same profit meets a different schedule depending on the wrapper it is earned in
Suppose a business earns profit of 90,000, and put an illustrative personal schedule beside it: nothing on the first 20,000, 25 percent from 20,000 to 60,000, and 40 percent above 60,000. Run that profit through as a sole proprietorship, where the business is not a separate taxpayer at all. The owner owes nothing on the first 20,000, then 25 percent of the 40,000 sitting in the middle band, which is 10,000, then 40 percent of the 30,000 above the top threshold, which is 12,000. Total tax is 22,000, an average rate of 24.4 percent. Now incorporate, and suppose the company rate is a flat 25 percent. The company owes 22,500, almost exactly what the personal schedule charged, so the choice of wrapper looks close to irrelevant. It stops being irrelevant when the money leaves the company. Paying the remaining 67,500 out as a dividend taxed at 20 percent costs another 13,500, bringing the combined bill to 36,000, or 40 percent of the original profit. The shortcut for that combined rate is one minus 0.75 multiplied by 0.80, which is 0.40. Retaining the profit inside the company defers the second layer for as long as the owner leaves it there.
One rate on profit is not one burden, because a company cannot bear a tax
A bracket answers who pays by construction: the person whose income it is. A corporate tax cannot, because a company is a legal arrangement and every dollar it loses eventually leaves some person poorer. Economists split the burden three ways. Shareholders take lower after-tax returns, workers take lower wages as the capital stock they work with grows more slowly, and customers can pay more where competition is weak. Which share dominates depends on how mobile capital is and how competitive the market is, and the question is live rather than settled. Free-response answers that say a tax on firms is paid by firms and stop there are describing paperwork. The second difference is the base. Profit is revenue minus deductible costs, so a firm with revenue of 500,000 and deductible costs of 500,000 owes nothing at all, however large its sales. A person earning 90,000 gets no equivalent write-off for rent or groceries, which is why the personal base sits far closer to gross income than the corporate base sits to gross revenue. Comparing the two headline rates without checking what each rate is charged on compares two numbers that measure different things. Work a bill at /calculate/corporate-income-tax.
Frequently asked questions
Do businesses have tax brackets?
Only businesses that are not separate taxpayers do. A sole proprietorship or partnership passes its profit to the owners' personal returns, where it runs through the graduated bands like any other income, so the rate depends on how much other income the owner has. A company taxed as its own entity usually faces a single rate on profit instead, and the graduated schedule reappears only when the money is distributed to its shareholders.
Why is corporate profit sometimes taxed twice?
Because the company and its owners are separate taxpayers, so profit is charged once when it is earned and again when it is paid out. On the figures above, 90,000 of profit taxed at a company rate of 25 percent leaves 67,500, and a dividend tax of 20 percent takes another 13,500, for a combined 36,000, or 40 percent. Retaining the profit postpones the second layer, and that pull toward retaining rather than distributing is one of the standard criticisms of the design.
Is the corporate income tax charged on revenue or on profit?
Profit, meaning revenue minus the costs the law lets a firm deduct. A firm with revenue of 500,000 and deductible costs of 500,000 owes nothing, which is how a company with large sales can pay no corporate tax without anything unusual having happened. Taxes charged on revenue do exist, such as a gross receipts tax, and they behave very differently, since a firm owes them even in a year it loses money.
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