Published on Apr 03, 2025 6 min read

State vs. Federal Income Tax: What You Need to Know

When it comes to paying income taxes, understanding the differences between state and federal taxes is important. Federal income taxes are collected by the U.S. government and apply to everyone across the country, while state income taxes vary depending on where you live. Some states don’t even have income taxes at all! Learning how these two systems work can help you plan your finances better and avoid confusion when it’s time to file your tax return.

What is Federal Income Tax?

The federal government uses income taxes to finance country-wide programs which serve all Americans. Federal income taxes depend on your individual income combined with your permitted tax breaks and personal exemptions. Your tax percentage to the federal government goes higher when you generate more earnings. All taxation funds the operation of national defense system alongside healthcare coverage education establishments and social security initiatives.

Use of federal income tax revenues

The federal government uses the money collected from income taxes for various purposes, including:

  • Military and defense spending
  • Social Security benefits for retirees and disabled individuals
  • Medicare and Medicaid programs
  • Education funding, including student loans and grants
  • Infrastructure projects, such as road maintenance and construction
  • Environmental protection initiatives

Who is required to pay federal income tax?

All payments earned by American residents from wages and investments lead to federal income tax responsibilities. Every U.S. citizen along with permanent resident needs to pay federal income tax no matter their current residence. The tax year reduces your federal tax burden through different exemptions combined with deduction opportunities. The exceptions involve giving to charity and payment of house interest together with commercial costs.

What is State Income Tax?

State income taxes are levied by individual states to generate revenue for state-specific programs and services. Each state sets its own tax rates and rules for who must pay state income taxes. Some states have a flat tax rate where everyone pays the same percentage of their income, while others have a progressive tax system with different tax brackets for different levels of income.

Use of state income tax revenues

State governments use the money collected from state income taxes to fund programs and services that benefit their residents. These can include:

  • Education funding, including public schools and universities
  • Public safety services such as police and fire departments
  • Healthcare programs, such as Medicaid and state-run insurance plans
  • Infrastructure projects within the state
  • Social welfare programs, such as food assistance and housing subsidies

Who is required to pay state income tax?

Not every state has an income tax. As of 2021, nine states do not collect income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Residents of these states do not need to file state income taxes. The remaining 41 states and the District of Columbia do collect state income tax from their residents. Just like with federal income tax, individuals who earn income in a state are required to pay state income taxes.

Differences between State and Federal Income Tax

While both federal and state income taxes serve the purpose of generating revenue for government programs, there are some key differences between the two:

Tax rates and brackets

Federal income tax uses a progressive system with different tax brackets for different levels of income. This means that the more you earn, the higher percentage of your income will be taxed. State income taxes can also use a progressive system, but some states have a flat tax rate where everyone pays the same percentage regardless of income.

Exemptions and deductions

Federal and state taxes also differ in their exemptions and deductions. Federal taxes offer standard deductions or itemized deductions to reduce taxable income, while state taxes may offer different types of deductions depending on the state’s specific rules.

Types of taxable income

Some states may not tax certain types of income that are subject to federal income tax. For example, some states do not tax retirement income or Social Security benefits, while others may have different rules for taxing investment income.

Tax filing deadlines

While the federal tax deadline is April 15th of every year, state tax deadlines can vary depending on the state. Some states follow the federal deadline, while others may have different dates for filing state taxes.

How State and Federal Income Taxes Work Together

Although state and federal income taxes are separate systems, they do work together in some ways. For example, your federal tax return may affect your taxable income for state taxes. If you claim deductions or exemptions on your federal return, these may also apply to your state return. Additionally, some states use information from your federal tax return to help calculate your state taxes.

Impacts of Income Tax on Individuals

Understanding how federal and state income taxes work can help individuals better manage their finances. By knowing the tax rates, deductions, and exemptions that apply to you, you can plan ahead for your tax bill and potentially reduce the amount you owe. It’s also important to keep in mind that most employers withhold taxes from paychecks throughout the year. This means that when it comes time to file your tax return, you may either receive a refund if too much was withheld or owe more if not enough was withheld.

Tips for Filing State and Federal Income Tax

Here are a few tips to help you navigate the process of filing your state and federal income taxes:

  • Keep track of all your income sources, including wages, investments, and any side jobs or freelance work.
  • Research deductions and exemptions that may apply to you in order to potentially lower your taxable income.
  • Make sure to file your taxes on time and pay any taxes owed by the deadline to avoid penalties and interest charges.
  • Consider consulting with a tax professional for guidance and assistance in filing your taxes.

Conclusion

Federal and state income taxes are essential sources of revenue for government programs and services. While both systems have similarities, they also have distinct differences based on their purpose and regulations. As a taxpayer, it is important to understand how these taxes work and how they may impact your financial situation. Consulting with a tax professional can also help ensure you are properly filing your tax returns and taking advantage of any deductions or exemptions available to you.