search icon

Income Tax Definition

Income tax refers to the mandatory payment a company makes to the government based on its earnings or profits, which is used to fund public services and government functions.

Starts at $0 + state fees and only takes 5-10 minutes

Excellent 4.8 out of 5 stars 28,091 reviews

Last Updated: February 23, 2026

Taxes are unavoidable, especially for small business owners. So it’s worth taking time to understand what they are, how they work, and more. This article covers some essentials about taxes, including:

  • Definition of Income Tax
  • Income Tax Benefits
  • Income Tax Examples

Definition of Income Tax

income tax defined

Income tax is a tax someone pays to the government based on the total income they make over the year. Both individuals and entities must file an annual income tax return and pay the amount owed. Income taxes are imposed by federal, state, and local governments. In the U.S., the federal government (through the Internal Revenue Service) uses a progressive income tax system where the more money someone makes, the higher their effective tax rate is, and the more income tax they pay. 

Although most income is subject to income tax, some forms of income are exempt. Taxpayers can also use tax deductions to decrease their taxable income and tax credits to reduce their tax liability. 

Income Tax Benefits

It can be tough for anyone to see their hard-earned money go toward taxes, but they exist to provide for everyone. When citizens pay income taxes, the government can fund public services, pay government debts, and offer goods and services to taxpayers. Taxes, in general, are a key source of revenue for the government to function properly. 

Income Tax Examples

There are several different types of income taxes: there are personal taxes, business taxes, as well as federal, state, and local taxes. Tax rates vary based on the type of taxpayer (individual versus entity) and the type and amount of income. 

Personal Income Tax

Personal income tax (also known as individual income tax) is a tax on a person’s income. Wages, salaries, dividends, interest, and other forms of income an individual earns are subject to income tax. The federal government and a majority of states impose an individual income tax. 

Business Income Tax

Businesses also pay income taxes. All businesses, except partnerships, are required to file an annual federal income tax return. Partnerships only file an information return. How a business is structured determines how it reports and pays income taxes. For example, if someone owns a limited liability company (LLC), the LLC itself doesn’t pay income taxes. Rather, each member pays taxes on their portion of the business’s income and reports the income on their individual return. This is known as pass-through taxation because the taxes pass through the company down to the individual owners. 

State and Local Income Tax 

State governments and local municipalities have the authority to impose income taxes as well. Tax calculation methods vary between states and cities, so it’s important to be familiar with the local jurisdiction’s tax rates. 

Summary

Income tax is a tax collected by the government based on a taxpayer’s total income. Income taxes are a way for the government to make money in order to fund its operations and benefit the public.

Additional Resources:

ZenBusiness Can Help

Starting a business, staying legally compliant, and growing the company is a lot to take on as a small business owner. Luckily, entrepreneurs don’t have to do it alone. ZenBusiness offers a range of products and services that can help any entrepreneur keep their business running smoothly. From starting a business with their formation services to managing company finances with ZenBusiness Money Pro, ZenBusiness has something for everyone.

Disclaimer: The content on this page is for information purposes only and does not constitute legal, tax, or accounting advice. For specific questions about any of these topics, seek the counsel of a licensed professional.

zenbusiness logo

Written by ZenBusiness Editorial Team

Start Your LLC