Read why some states are considering imposing a flat tax rate that isn't adjusted by income

Over a century ago, fewer than 1% of Americans paid income taxes—but the cost of World War II prompted the federal government to greatly expand the number of people required to pay income taxes.

The US officially adopted an income tax in 1913

The US first levied income taxes during the Civil War, but modern income taxes became an American fixture in 1913. Two years earlier, Congress passed the 16th Amendment to give the government the right to tax individuals' and businesses' income. The US still technically levies the same federal income tax now as it did then—though it's evolved.

States with the highest (and lowest) tax rates

WalletHub researchers evaluated not just income taxes but real estate, sales, and other levies in order to rank every state by its total effective local and state tax rate (not including federal). Alaska scored the lowest total tax rate and Illinois...

The most taxed states in America

Some states in the US have higher taxes than others. Hawaii, for instance, has the highest total tax burden in the country at 13.9%, whereas Alaska has the lowest overall tax burden at 4.9%. New York has the highest individual income tax burden; and eight states have no individual income tax. See a map of the most-taxed US states here.

What America's 1% pays in taxes, by state

In the US, the top 1% of earners contribute 45% of all personal income taxes collected nationwide. But not all states are created equal when it comes to income tax. Some states are more dependent on the 1% than others for tax revenue. SmartAsset recently examined IRS tax return data to determine exactly how much the top 1% of earners in each state paid in taxes. Find your state here.

Since 1913, Americans have paid income taxes at varying rates

In the 2020s, the top marginal tax rate has floated around 37%, relatively lower than previous eras. Some have called for boosting the rate significantly to tax the highest earners.

See how income taxes in the US compare to those of other countries.

Only 5 states have inheritance taxes

Unlike estate taxes, inheritance taxes paid by the beneficiary of the estate (the person who inherits the deceased person's financial assets). The federal government doesn't levy an inheritance tax, but five states do. They all have varying tax rates and rules.

More than 15 states have estate or inheritance taxes—but Maryland is the only state with both

Eighteen states, and Washington, DC, have estate or inheritance taxes in place. Tax rates and thresholds vary per state, but most are less than the federal estate tax rate and threshold. This means an estate doesn't have to be as lucrative to be subjected to the taxes.

Hawaii and New York have the highest tax burdens out of all US states, both exceeding 12% of income

The term "tax burden" in this case refers to property, income, sales, and excise taxes as a share of total personal income. Alaska and New Hampshire have the lowest total tax burdens in the US, both falling below 6%.

On July 1, 1862, the agency now known as the Internal Revenue Service was established and named the Bureau of Internal Revenue

It was created to collect the first-ever US income tax, which was created to help pay for the Civil War. After gaining their independence from Britain, Americans were skeptical about giving the federal government absolute power to collect federal income taxes. As a result, early US tax laws dictated that direct taxes, like income taxes, had to be directly apportioned to a state's population. The nation went back and forth on its federal tax laws multiple times. For instance, in 1872, the income tax from the Civil War was repealed. But it was revived in 1894, and then repealed again in 1895. In 1913, Congress passed the 16th Amendment, giving Congress the power to levy income taxes on individuals and corporations without apportioning the burden among the states in line with population, once and for all.

Read a breakdown of each state's pay transparency laws.

Pay transparency laws in the US are evolving quickly, as some states introduce them for the first time and others update existing legislation. This resource has an updated list of key pay transparency legislation in states across the country, as well as general explainers about what each of those laws dictate. Check it out here.

Understanding the low corporate tax rate in the US

Corporate taxes, which make up roughly a third of the federal government's revenue, have been calculated using a flat 21% rate since the Tax Cuts & Jobs Act of 2017. The current rate is considered low both by historic standards (it averaged over 50% in the 1950s and 1960s) and compared to other countries.

Americans between the ages of 45 and 55 pay nearly 30% of all income taxes, paying an average tax rate of around 17%.

Before the 16th Amendment, US tax law required direct taxes to be directly apportioned to a state's population

Due to these requirements, the federal government could not impose many direct taxes. Direct taxes include property and income taxes, whereas indirect taxes include duties and excises.

Visualizing US state taxes in seven charts

Ever wondered how your state’s tax system compares to others? Here’s an overview of the US state tax system based on seven visualizations.

Why the rich don't pay taxes like you do

The system behind the US income tax isn't as straightforward as it looks. You earn money. Taxes get taken out. Case closed … right? Not exactly. In this episode of "1440 Explores," we break down how the US tax system actually works, from confusing deductions and misunderstood tax brackets to why the wealthiest Americans often end up paying a very different tax than everyone else.

Watch this video to learn how US tax brackets actually work.

Capital gains taxes were first levied in the US in 1913

However, up until 1921, they were treated the same as ordinary income. Ever since then, rates have swung up and down.

Read about potential changes to pay transparency laws at the federal level, as well as key aspects of states' transparency laws.

While many US states have pay transparency laws, no similar legislation has been passed at a federal level. However, the Salary Transparency Act was introduced in Congress in March 2023. For details about what that legislation would mandate and its status in the US House and Senate, click here.

Some policymakers take issue with long-term capital gains being taxed at a preferential rate compared to income from paid work

The concept of taxing unrealized capital gains—when an asset’s value increases but has yet to be sold—has been increasingly debated. Other policymakers in recent years have supported lowering the highest long-term capital gains tax rate and are generally opposed to levying taxes on unrealized capital gains.

A rising number of Social Security beneficiaries are taxed on their Social Security income

That’s because while Social Security benefits increase with wages and inflation, the income limits for taxing those benefits stay the same and don’t adjust over time.

Map of each state's largest tax revenue source

While America’s federal government primarily raises revenue through personal and corporate income taxes, it's a different story for each of the 50 states. This map shows how every state raises tax revenue for government activities. New York and California, for instance, raise most of that money through personal income taxes, whereas Texas and Florida have sales tax as their largest sources of tax revenue. Click here to see the map.

25% of US households had no regular income as of 2024

Some states had higher shares of no-income households than others: West Virginia, for instance, had a national high of 34% of households with no income. These states tend to have older populations, higher rates of disability, and lower median incomes overall. In such contexts, a larger portion of households rely on non-earned income sources or report no income during the survey period.

In 2021, Colorado became the first state in the US to require companies to publicly disclose salary ranges on job postings.

In 2021, Colorado became the first state in the US to require public disclosures of salary ranges. Flash forward a few years, and other places in America would get salary transparency laws, too, like Washington state, New York City, and California. But the salary transparency movement might have a downside: Some researchers believe it could hurt wage growth for workers over time. Watch this video to learn more.

The first federal minimum wage wasn't set until 1938, when it was 25 cents per hour.

More than 5 states have enacted salary transparency laws, and at least 15 states are considering it.

Pay transparency is a relatively new legal phenomenon, so studies on its impact are limited. However, this article details a few early studies that suggest pay transparency legislation could help decrease the gender pay gap, increase labor participation rates, and reduce employer recruiting costs. Learn more here.

The highest 2024 federal income tax bracket covered income upward of $731,201 for married couples filing jointly

To understand what you would owe on short-term capital gains and to visualize the favorability of long-term tax rates, you need to know how your traditional income is taxed at the federal level. A breakdown explores the different brackets for 2024, separated by filing status.

Tipped workers in ‘$2.13 states’ experience an estimated 18.5% poverty rates

In so-called “equal treatment states,” where tipped workers are subject to the normal federal minimum wage or higher rather than the tipped minimum wage, the poverty rate is 11.1%.

Warren Buffett paid a lower effective tax rate than his secretary

While wages and salaries are taxed progressively at rates up to 37%, long-term investments are taxed at lower rates: 0%, 15%, or 20%. For wealthy individuals like Buffett, whose income mainly comes from investments, this means paying a lower effective tax rate than someone earning a salary.

Death taxes are placed on a deceased person's estate

Death taxes can include liquid cash, property, stocks, or other financial assets they owned. There are two main types of death taxes in the US: the estate tax and inheritance tax. Death taxes are levied at the federal and state level, but are targeted towards the rich.

The federal minimum wage in the US has been $7.25 per hour since 2009—making this the longest the US has gone without a minimum wage increase since 1938.

Individual income taxes are the federal government's primary revenue source, see a tracker that breaks down where the rest of the budget comes from

The US government historically makes nearly half of its total revenue last year from individual income taxes. But the US makes also makes money from a variety of other sources, including Medicare taxes and corporate income taxes. However, the federal government has run a deficit since 2001—reaching a peak of $3.13T in 2020.

80% of Americans are bothered that some wealthy people don't pay their fair share of taxes

That's according to data from Pew Research Center. While most people are primarily taxed on their wages, many people in America's 1% derive much of their income from investments instead, which are often taxed at preferential capital gains rates. This structure was shaped by a series of legislative cuts that began in earnest with the 1978 Revenue Act and the 1981 Economic Recovery Tax Act.

How the federal income tax affected Prohibition

In the early 1900s, 30% to 40% of government tax revenue came from liquor, wine, and beer, a reliance that made Prohibition seem like a fiscal impossibility. But the passage of the federal income tax in 1913 changed the calculus, which helped allow the government to ban alcohol production and sales.

See every time the minimum wage has been raised.

See comparisons of different countries' taxation strategies

Taxes are a major revenue source for most countries, and how each government taxes citizens often reflects the country's economy. Developed countries tax at much higher rates than developing ones, and as a country grows its GDP, it also typically grows the proportional percentage of taxes it gains from its citizens.

Estate taxes are paid out of the estate, while inheritance taxes are paid by beneficiaries

When a person dies, any estate taxes owed are paid out of their finances before being transferred to their beneficiaries—unlike inheritance taxes that are paid by the beneficiaries themselves. In addition to a federal estate tax, 12 states and the District of Columbia have a state estate tax with varying rates.

Opponents of the federal estate tax began using the term 'death tax' in the 1940s to sway public opinion.

The 16th Amendment paved the way for capital gains taxes

Ratified in 1913, the 16th Amendment paved the way for a far-reaching federal income tax and supercharged the country’s coffers. Before then, the US depended on import tariffs and so-called consumption taxes to raise revenue.

Read why the information Americans have about our tax system might be misleading

For many, filing taxes can be complicated and overwhelming. Some argue that the tax system obscures certain aspects of the US tax code, making it difficult for taxpayers to accurately assess potential reforms.

Many states require higher direct wage amounts for tipped employees than the federal requirement

Employers of "tipped employees" are required to pay them $2.13 per hour in direct wages if that amount, combined with the tips, at least equals the federal minimum wage of $7.25. If the employee's tips combined with the employer's direct wages of at least $2.13 per hour do not equal the federal minimum hourly wage, the employer has to make up the difference. However, this differs from state to state. This interactive map shows what tipped workers make per hour in every state.

27 states have right-to-work laws

That means employees in those states can choose whether or not to join a union at their workplace. Right-to-work laws also make it optional for employees in unionized workplaces to pay fees associated with union membership.

Learn how the US tax code works and why it's important

First published in 1926, the US Code is the official codification of federal statutes in the US. Title 26 of the US Code, for instance, lists all of the federal tax laws of the United States. A new edition is published every six years.

Most pensions are subject to federal income taxes

Those taxes kick in once someone starts taking distributions from their pension. Whether a pension is subject to state income taxes depends on the state and other factors. Learn more about how pensions are taxed in this article.

An animation of how the minimum wage changed every year from 1968 to 2018

In the United States, both the federal and state minimum wages have changed a lot over the years. See how—both in each state and at the federal level.

See how income levels have changed in each state since 2010

Since 2010, the median household income has increased by 22% on average. Montana, the state with the largest growth rate, saw a 42.9% increase, while New Mexico saw the lowest income growth rate at 2.3%.

Read about the tax implications of remote work's increasing popularity

Tax complications can arise when a remote employee opts to work from a state where their employer had not previously done business. Demand for remote jobs has remained high since the pandemic accelerated remote work's popularity.

The impact of knowing your coworker’s salary

In 2025, five more states enacted pay transparency laws, requiring employers to disclose salaries in job postings. The goal? Reduce wage gaps and promote fairness. But despite these laws, 42% of job listings still hide pay details.

Charting where federal revenue comes from

About 50 percent of federal revenue comes from individual income taxes, 7 percent from corporate income taxes, and another 36 percent from payroll taxes that fund social insurance programs. See breakdown in charts here.