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Introduction to U.S. Tax System

The U.S. Tax System

In the United States, the power to tax is written into the Constitution. The federal government, along with state and even local governments, can levy taxes to fund their operations. While this article focuses on the federal system, it's helpful to remember that you likely pay taxes at multiple levels.

The foundation for the modern federal income tax is the 16th Amendment, ratified in 1913. It gives Congress the power to collect taxes on incomes, from whatever source derived, without apportioning it among the states. This simple but powerful authority is the basis for the complex system we have today.

Who Makes the Rules?

Congress is responsible for writing federal tax laws. These laws are collected and organized into a single, massive body of legislation known as the Internal Revenue Code, or IRC. It's the official rulebook for all federal taxes.

Internal Revenue Code

noun

The body of federal statutory tax law in the United States, codified as Title 26 of the United States Code. It specifies the rules for income, gift, estate, sales, payroll, and excise taxes.

But a rulebook needs a referee. That's where the Internal Revenue Service (IRS) comes in. The IRS is the nation's tax collection agency, operating under the Department of the Treasury. Its job is to interpret and enforce the IRC. This involves everything from processing tax returns and collecting payments to providing taxpayer service and pursuing those who don't comply with the law.

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Types of Federal Taxes

The federal government levies several different kinds of taxes. While income tax is the most well-known, it's far from the only one.

Income Tax: This is a tax on income generated by individuals and corporations. It's the largest source of revenue for the federal government. For individuals, this includes wages, salaries, business profits, and investment returns.

Taxes on property transfer are another key category. These are designed to tax large transfers of wealth.

  • Estate Tax: This tax is imposed on the transfer of property after someone's death. It applies only to very large estates, with a significant exemption amount that means most people will never have to pay it.
  • Gift Tax: This tax works alongside the estate tax. It applies to transfers of property or money made while a person is still alive. Like the estate tax, there are generous annual and lifetime exemptions, so it only affects very large gifts.
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Finally, there are taxes tied to specific activities or goods.

Excise Tax: These are taxes on the sale of specific goods or services, like fuel, airline tickets, and tobacco. They're often built into the price of the item, so you may not notice you're paying them.

Employment Taxes: These are taxes paid by both employees and employers to fund specific social insurance programs. The most common are Social Security and Medicare taxes, which you'll see listed as FICA on your paycheck.

Together, these different taxes provide the funding necessary for all federal government operations, from national defense and infrastructure to social programs and scientific research. Understanding this basic structure is the first step in navigating the world of taxes.