What a Graduated Income Tax Is

A graduated income tax is a system where the percentage of tax you pay increases as your income increases. Instead of paying the same tax rate on every dollar you earn, you pay different rates on different portions of your income. The lowest earners pay the lowest rate, and the rate steps up as you move into higher income brackets.

The United States has used a graduated income tax since 1913. Your income is divided into brackets, and each bracket has its own tax rate. For example, in 2024, the first portion of your income might be taxed at 10 percent, the next portion at 12 percent, and so on, up to 37 percent for the highest earners. You do not pay the top rate on all your income — only on the portion that falls into that bracket.

This is different from a flat tax, where everyone pays the same percentage regardless of income, or a regressive tax, where lower earners pay a higher percentage. The graduated system is also called a progressive tax because the tax burden increases progressively with income.

Key Takeaways

  • In a graduated income tax, your income is split into brackets, and each bracket is taxed at a different rate, with higher brackets taxed at higher rates.
  • You only pay the higher rate on income that falls into that higher bracket, not on your entire income.
  • The United States has used graduated income tax since 1913, and most states also use graduated systems for state income tax.
  • The number of brackets and the rates change each year and vary by state, so your tax burden depends on where you live and your total income.
  • A graduated system is designed so that people with higher incomes pay a larger share of total taxes, though debate continues about whether the current rates are fair.

How Tax Brackets Actually Work

Understanding brackets is the key to understanding graduated tax. Suppose the 2024 federal brackets are 10 percent, 12 percent, 22 percent, 24 percent, 32 percent, 35 percent, and 37 percent (the actual brackets vary by filing status and change yearly). If you are single and earn $50,000, you do not pay 22 percent on all of it. Instead, you pay 10 percent on the first portion, 12 percent on the next portion, and 22 percent only on the amount above a certain threshold.

The threshold where each rate begins is called the bracket limit. For 2024, a single filer's brackets might look like this: 10 percent on income up to $11,600, then 12 percent on income from $11,601 to $47,150, then 22 percent on income from $47,151 to $100,525. If you earn $50,000, you pay 10 percent on the first $11,600, 12 percent on the next $35,550, and 22 percent on the remaining $2,850. Your total tax is lower than if you paid 22 percent on all $50,000.

This is why people sometimes say "I do not want to earn more because I will move into a higher tax bracket." That is a misunderstanding. Moving into a higher bracket only means the income above the threshold is taxed at the higher rate. The income you already earned is still taxed at the lower rate. Earning more always results in more take-home pay, even if some of it is taxed at a higher rate.

Why the United States Adopted Graduated Income Tax

Before 1913, the federal government relied mainly on tariffs and excise taxes. The 16th Amendment, ratified in 1913, gave Congress the power to collect income tax without apportioning it among the states. The first federal income tax was graduated: the lowest rate was 1 percent, and the highest was 7 percent on incomes over $500,000 (a very large sum at the time).

The reasoning behind the graduated structure was that people with higher incomes could afford to pay a larger share of the cost of government. A person earning $1 million loses less in purchasing power by paying 7 percent than a person earning $20,000 loses by paying 1 percent. This principle is called ability to pay.

Tax rates have changed many times since 1913. During World War II, the top rate reached 94 percent. In the 1980s, it dropped to 50 percent, then to 28 percent. Today it is 37 percent. The number of brackets has also varied — sometimes there have been as few as two brackets, sometimes as many as fifty. The current system reflects ongoing political debate about what rates are fair and what the government needs to fund.

State Income Tax and Graduated Brackets

Most states also use graduated income tax systems, though the brackets and rates differ from federal tax. Some states have only two or three brackets; others have many more. A few states — including Texas, Florida, and Wyoming — do not have a state income tax at all. Others, like Tennessee and New Hampshire, tax only investment income, not wages.

Your total income tax burden depends on both federal and state rates. If you live in California, which has a top state rate of 13.3 percent, your combined federal and state rate at the highest bracket is much higher than if you live in a state with no income tax. The brackets also adjust yearly for inflation, so the income ranges that fall into each bracket change each year. The IRS publishes new brackets in late fall for the following year.

Graduated Tax Versus Other Tax Systems

A graduated income tax is one of three main approaches. A flat tax charges the same percentage to everyone, regardless of income. Supporters argue it is simpler and fairer because everyone pays the same rate. Critics say it places a heavier burden on lower earners, who spend a larger share of their income on necessities and have less left over after taxes.

A regressive tax takes a larger percentage from lower earners than from higher earners. Sales tax is regressive because a person earning $30,000 spends a larger share of their income on taxable goods than a person earning $300,000. Property tax can also be regressive in some areas. The graduated income tax was designed partly to offset the regressive effect of these other taxes.

Most developed countries use some form of graduated income tax. The rates and brackets vary widely. Some countries have steeper graduation (a bigger jump between the lowest and highest rates), while others are flatter. The choice reflects each country's values about fairness, government funding needs, and economic policy.

How Graduated Tax Affects Your Paycheck

Your employer withholds federal income tax from each paycheck based on the W-4 form you fill out when you start a job. The withholding is calculated to approximate your total tax burden for the year, spread across all your paychecks. If you withhold too much, you get a refund when you file your tax return. If you withhold too little, you owe money.

The amount withheld depends on your income, filing status, and the number of dependents you claim. It also depends on whether you have other income sources, such as a second job or investment income. The graduated brackets determine how much of your total income is taxed at each rate, and that determines your total tax bill for the year.

If your income changes during the year — you get a raise, lose a job, or start freelance work — your withholding may no longer match your actual tax burden. You can adjust your W-4 at any time to increase or decrease withholding. Many people adjust in the fall if they realize they are on track for a large refund or a large bill.

Frequently Asked Questions

Does moving to a higher tax bracket mean I take home less money?

No. Only the income that falls into the higher bracket is taxed at the higher rate. Your income in the lower brackets is still taxed at the lower rate. If you earn $1,000 more, you pay more tax on that $1,000, but you still keep most of it. You always take home more money when you earn more, even if some of it is taxed at a higher rate.

Why do tax brackets change every year?

The IRS adjusts brackets yearly for inflation so that wage increases that straightforward keep up with the cost of living do not push you into a higher bracket. This adjustment is called bracket creep prevention. Without it, people would pay more tax just because prices went up, even though their purchasing power stayed the same.

Is the graduated income tax the same in every state?

No. States set their own income tax rates and brackets. Some states have no income tax, some have flat rates, and some use graduated systems with different numbers of brackets and different top rates. You pay both federal and state tax, so your total burden depends on where you live.

What is the difference between a graduated tax and a progressive tax?

These terms are often used interchangeably. A graduated tax has brackets with different rates. A progressive tax is one where the percentage increases as income increases — which is what graduated income tax does. The terms describe the same system from slightly different angles.

Can Congress change the tax brackets and rates?

Yes. Congress passes tax legislation that sets the rates and brackets. These can change with each new law. The brackets are adjusted yearly for inflation, but the rates themselves — the actual percentages — change only when Congress passes new legislation. This is why tax rates have varied so much throughout U.S. history.