In this edition of the ProPublica Free Tax Guide, we talk about tax brackets, audits and who is most likely to get audited. It might not be who you would assume!

What is a tax bracket?

The federal government taxes people based on how much they make each year. Seven tax brackets — based on income ranges — determine how much you pay:

What are the filing categories for income tax brackets?

In addition to those brackets, there are four main categories, also known as “statuses,” that affect how you are taxed:

1. Single filers — unmarried
2. Married, filing jointly — couples filing together
3. Married, filing separately
4. Head of household — unmarried, live with a qualifying child

Together, the categories and brackets look like this:

So, how do tax brackets work?

If you look at the table above, you might assume that you are simply taxed at one flat rate for all of your income. But it’s more complicated than that.

The U.S. has what’s called a progressive tax system. What that really means is the amount you get taxed progresses with the amount of money you make — even within the tax brackets outlined above.

Example: Let’s say as a single filer, you bring in a taxable income of $20,000. You would fall into the 12% tax bracket, but you wouldn’t simply be taxed 12%. Instead, you would get taxed at the lowest rate for the first $9,700 you make and at higher rates for the money you make above that.

In other words, you would be taxed in two different tax brackets: $0 to $9,700 and $9,701to $39,475. For the first $9,700 you make, you are only taxed 10%. The remaining $10,300 you make is taxed at the next tax bracket level of 12%. So you would owe $970 for the first bracket and $1,236 for the second bracket.

What are the differences between state and federal tax brackets?

The above chart shows federal income tax brackets. There are also separate state tax brackets. Each state has its own rules, but they generally tax income at lower rates than the federal government. Most states have a progressive tax structure similar to the federal one. There are some exceptions though.

Seven states do not tax income at all:

• Alaska
• Florida
• Nevada
• Texas
• South Dakota
• Washington
• Wyoming

Tennessee and New Hampshire don’t tax income from wages but do tax some income from investments.

Nine states tax income at one flat rate, no matter how much you make:

• Colorado
• Illinois
• Indiana
• Kentucky
• Massachusetts
• Michigan
• North Carolina
• Pennsylvania
• Utah

What tax bracket am I in?

To determine your tax bracket, you need to know your taxable income in 2019. This involves figuring out two things: your income and your tax deductions.

• Income: Essentially all income is taxable income. This includes your salary, wages, tips, any payment for freelance work, sales from real estate and more. (It also includes capital gains, which can be taxed at different rates depending on whether or not they are short or long term, and what your income is).

• Tax deductions: A tax deduction is an amount of money that’s subtracted from your total income, therefore lowering the amount of tax you have to pay.

Once you’ve determined your total income, you can generally subtract any deductions to arrive at your taxable income. See the chart above to find out where it places you.

What is the standard deduction?

The most-used tax deduction is the standard deduction, which is a no-questions-asked amount that you can subtract from your income, lowering the total amount of taxes you have to pay. Before claiming the standard deduction, make sure you understand the rules — for example, you can’t deduct home mortgage interest if you are also claiming the standard deduction.

Example: Let’s take a single person whose only income is from their salary of $32,000. If they only take the standard $12,200 deduction, they will have a taxable income of roughly $20,000. That means they’ll fall into the 12% bracket.

What is an IRS tax audit?

An IRS audit is a review of a person’s tax filing by an IRS official to make sure everything was done correctly. Sometimes, you’ll be chosen randomly, but usually something or someone will make your return stand out, and it will be flagged for an audit. If you’re being audited, you will find out via mail — never over the phone.

You might also hear from the IRS via a tax notice, which is usually less serious and could be for any number of reasons, like verifying your identity, increasing or decreasing your tax return amount.

How far back can the IRS audit?

The IRS generally includes the past three filing years in a tax audit. However, the agency can look further back if it identifies a major error. Typically it does not look back further than six years.

Who gets audited?

The IRS audits taxpayers with household income between $50,000 and $100,000 the least.

As ProPublica has reported, the IRS has seen its budget slashed year over year, and its ability to audit the wealthy and corporations has also suffered. These days, the top-earning 1% of taxpayers are audited at about the same rate as those who claim the earned income tax credit (EITC), a group that has an average household income of $20,000 a year.

A recent analysis found that a rural county in the Mississippi Delta was the highest-audited county in America, despite the fact that more than a third of its mostly African-American population is below the poverty line. Also, the five counties with the highest audit rates are all predominantly African American, rural counties in the Deep South.

“Those struggling to make ends meet are being unfairly audited while the fortunate few dodge taxes without consequence,” Sen. Ron Wyden, D-Ore., the ranking member on the Senate Finance Committee, told ProPublica in 2018.

Has Trump’s tax plan made new U.S. tax brackets?

The short answer is no.

But Trump’s tax plan did change the percentage at which you are taxed within the tax brackets. In most cases, it lowered the amount people would be taxed in each bracket, except for the lowest, which stayed the same at 10%. The changes are set to expire in 2025, at which point Congress will have to take up the tax law again or much of it will go back to what it was before 2018.

The IRS changes the tax brackets every year a tiny bit to keep pace with inflation and increasing costs of living.

Previously:How to File Your State and Federal Taxes for Free in 2020

About this guide:

ProPublica has reported extensively about taxes, the IRS Free File program and the IRS. Specifically, the ways in which the for-profit tax preparation industry — companies like Intuit (TurboTax), H&R Block and Tax Slayer — has lobbied for the Free File program, then systematicallyundermined it with evasive search tactics and confusing design. These companies also work to fill search engine results with tax “guides” that sometimes route users to paid products.