Income Tax: Facts and Filings

December 01, 2016
The hardest thing in the world to understand is the income tax.
—Albert Einstein

Introduction

It’s on the calendar: the April 15th filing deadline for federal individual income tax. Just as a new year begins, it’s tax-filing season and the frenzy begins. Some taxpayers are excited and eagerly anticipate a tax refund. Predictably, they are likely to file their tax returns early. Others are stressed and fearful of how much they might owe the government. Tax preparers are extremely busy filling out forms and filing tax returns. And on April 15th, some post offices stay open late to accommodate filers who wait until the last minute to make the midnight deadline. Why do tax forms cause such frenzy?

Taxes must be paid—it’s the law. Federal individual income tax must be paid to the U.S. government on all forms of annual earnings that make up a taxpayer’s taxable income. Taxable income is calculated based on the taxpayer’s adjusted gross income for the tax year minus allowable tax exemptions, deductions, and credits. But making the calculations and completing the forms necessary for determining taxable income can be confusing and complex!

History of the Federal Income Tax

Congress initiated the first U.S. federal income tax in 1862 to collect revenue for the expenses of the Civil War. The tax was eliminated in 1872. It made a short-lived comeback in 1894 but was ruled unconstitutional the very next year. Then, in 1913, the federal income tax resurfaced when the 16th Amendment to the Constitution gave Congress legal authority to tax income. The result was a revenue law that taxed the income of both individuals and corporations.1

Collection of the Federal Income Tax

Income tax is collected by the Internal Revenue Service (IRS), a federal agency. The IRS was originally called the Bureau of Internal Revenue, but the name changed in the 1950s.2 Making the collection of the tax easier, the Current Tax Payment Act was signed into law in 1943. This law requires employers to withhold federal income tax from an employee’s paycheck each pay period and send the payment directly to the IRS on behalf of the employee.3 In this way, income tax is collected on a “pay as you earn” basis.

The amount withheld is determined by information the employee provides on an IRS W-4 form. This form collects information including the employee’s filing status, whether married or single, and allowances that can be claimed. The information is used to calculate a reasonable estimate of the amount of income tax to be withheld from each paycheck.

By January 31 of each year, employers must furnish employees a W-2 Wage and Tax Statement. This form is used by employees to complete individual tax returns. Among other things, it includes the total amount of income earned and the amount of federal income tax withheld over the given year. Generally, if too much federal income tax has been withheld, a taxpayer will receive a refund. If not enough has been withheld, the taxpayer must pay the government the additional amount owed.

The Individual Income Tax Structure

The federal individual income tax is a progressive tax based on the ability-to-pay principle. A progressive tax is a tax in which higher-income earners pay a larger percentage of their income in tax than do lower-income earners. The IRS categorizes taxable income into tax brackets, and each tax bracket pays a different tax rate. To arrive at the tax rate, the taxpayer’s filing status must be determined as explained in Publication 501 from the IRS. After calculating the amount of taxable income and identifying the filing status, the tax rate can be identified. For example, for 2016, the seven tax brackets range from 10 to 39.6 percent.

2016 Income Tax Brackets

The seven IRS tax brackets are 10%, 15%, 25%, 28%, 33%, 35%, and 39.6%. The amount of income tax owed depends on taxable income and filing status. Income falling within a particular bracket will be taxed at that tax rate. Additional income will be taxed according to the rate in the next tax bracket. Example: The income tax a single taxpayer with a taxable income of $10,000 must pay is 10% for the first $9,275 plus 15% for the remaining $725.

10% × $9,275 = $927.50

5% × $725 = $108.75

Total Tax = $927.50+$108.75 = $1,036.25

 

Filing Status
Rate Single Married filing separately Married filing jointly or qualifying widow(er) Head of Household
10% $0 to $9,275 $0 to $9,275 $0 to $18,550 $0 to $13,250
15% $9,276 to $37,650 $9,276 to $37,650 $18,551 to $75,300 $13,251 to $50,400
25% $37,651 to $91,150 $37,651 to $75,950 $75,301 to $151,900 $50,401 to $130,150
28% $91,151 to $190,150 $75,951 to $115,725 $151,901 to $231,450 $130,151 to $210,800
33% $190,151 to $413,350 $115,726 to $206,675 $231,451 to $413,350 $210,801 to $413,350
35% $9,276 to $37,650 $9,276 to $37,650 $18,551 to $75,300 $13,251 to $50,400
39.6% $415,051 or more $233,476 or more $466,951 or more $441,001 or more
SOURCE: IRS.com, 2016 Federal Tax Rates - Personal Exemptions and Standard Deductions.

Without doubt, the highest income earners pay a greater portion of total income taxes collected by the IRS. For example, the top 50 percent of income earners paid 97.2 percent of all federal income taxes in the year 2013 (see Figure 1 below).

Figure 1: Comparing High-Income Tax Rates

Two bar graphs side-by-side. The first bar graph shows the average tax rate paid by income groups, with those earning the most paying the highest level of taxes. The second graph shows the share of income and income taxes paid by income group, with the group with the lowest share of income paying the highest share of taxes.  

NOTE: Original images ©Tax Foundation.

SOURCES: IRS.gov, SOI Tax Stats - Individual Income Tax Rates and Tax Shares; Tax Foundation, Summary of the Latest Federal Income Tax Data, 2015 Update, November 19, 2015.

The Purpose of the Federal Income Tax

Figure 2: Federal Tax Revenue, 2015: $325 Trillion

A pie chart showing the breakdown of federal tax revenue in 2015. 47.4% of revenue comes from individual income taxes, followed by payroll taxes at 32.8%, corporate income taxes at 10.6%, excise taxes at  3%, and all other taxes at 6.2%.

SOURCE: Office of Management and Budget. Historical Tables 2.1 and 2.2. Accessed October 26, 2016.

The U.S. government collects trillions of dollars in revenue from several types of taxes and fees. Of all the federal taxes and fees, the individual income tax is the largest revenue source. For example, in 2015, it was $1.54 trillion and nearly half of all tax revenue collected.4 Congress and the president determine how this tax revenue is spent. The revenue allows the government to operate and provide goods and services for citizens, such as roads, bridges, national parks, education, research, and national defense.

Tax Refunds

A tax refund is money owed to a taxpayer when total tax payments or credits are greater than the total tax liability. On average, nearly four out of five U.S. tax filers get a tax refund from the government each year.5 For the 2015 tax year, the IRS reports nearly 117 million individual income tax refunds, which totaled over $346 billion.6

Overpayment

The majority of tax refunds are due to taxpayers having paid the government more than they actually owed in taxes. When a tax return is completed and an overpayment is shown, the IRS refunds the overpayment. The government is not giving anything away—just returning money. Actually, since the government does not pay interest on an overpayment, the taxpayer is giving the government an interest-free loan out of each paycheck.

Earned Income Tax Credit

A second reason for tax refunds is the earned income tax credit (EITC). Of the nearly 117 million refunds for individual income tax in 2015, almost 24.1 million were based on the EITC.7

The EITC is a tax credit for low- to moderate-income working taxpayers, particularly those with children. The amount of the EITC benefit depends on the recipient’s income and number of children.

About the EITC

IRS Publication 596 is updated each year to assist taxpayers in determining the EITC allowed. Some of the general rules for 2015 are shown below.

Rules for Qualifying for the EITC in 2015

  • You must have a valid Social Security number by the due date of your 2015 income tax return.
  • Your filing status cannot be “married filing separately.”
  • You must be a U.S. citizen or resident alien all year.
  • You must have earned income.

Note: Your income must be less than the maximum amount given in the table. If you earn more, you do not qualify.

Number of qualifying children Adjusted gross income for single taxpayers Adjusted gross income for married filing jointly taxpayers
3 or more Less than $47,747 Less than $53,267
2 Less than $44,454 Less than $49,974
1 Less than $39,131 Less than $44,651
0
(You must be at least age 25 but under age 65.)
Less than $14,820 Less than $20,330
SOURCE: IRS Publication 596

A tax credit directly reduces the amount of taxes owed. The EITC is different from most tax credits because it is a refundable tax credit. The credit can completely eliminate the income tax liability and result in a refund. For example, if a taxpayer has a tax liability of $200 and an EITC of $500, the taxpayer would be refunded the difference and receive a refund check in the amount of $300.

Federal Spending

2013 Federal Spending on the Largest Anti-Poverty Programs
Program Millions of dollars*
Medicaid $266,565
SNAP $82,603
EITC $55,123
NOTE: *Inflation adjusted.
SOURCE: Office of Management and Budget.

The EITC began with the Tax Reduction Act of 1975, and this anti-poverty program has expanded over the years as determined by Congress.8 The refundable portion of the EITC is classified as a spending program of the government and currently is the third-largest social welfare program in the United States. The largest two are Medicaid, a health care program for qualifying low-income individuals and those with disabilities, and the Supplemental Nutrition Assistance Program (SNAP, formerly called food stamps), which helps low-income individuals purchase food.

Estimated EITC (billions of dollars)
Year Total EITC Refundable
2016 $73.3 $63.7
2017 $76.0 $66.1
2018 $73.8 $63.8
2019 $75.6 $65.3
Total estimated $298.7 $258.9
SOURCE: The Joint Committee on Taxation. Estimates of Federal Tax Expenditures for Fiscal Years 2015-2019 . December 7, 2015;

The EITC is a benefit to taxpayers who receive it but directly reduces the amount of tax revenue for the U.S. government. In 2015, the refundable portion of the EITC was more than $60 billion.9 Looking forward, the Joint Committee on Taxation has estimated the cost of the EITC for each year through 2019.

Conclusion

The original income tax codes and regulations designed in 1862 took about 400 pages to describe. In 1913, the tax form was four pages and included one page of instructions.10 Today, the federal tax code is almost 75,000 pages,11 and the IRS website lists over 2,000 different forms and publications.12 The increasing complexity causes many taxpayers to rely on professional tax preparers to complete and file their tax returns. In fact, a study of the 2011 tax year shows more than half of the 145 million individual tax returns were completed by a paid tax preparer.13 With tax returns becoming longer and more complex and with more forms to file, the frenzy continues.

About the Author
Jeannette Bennett, Senior Economic Education Specialist
Jeannette Bennett

Jeannette N. Bennett is a senior economic education specialist with the St. Louis Fed’s Memphis Branch.

Jeannette Bennett, Senior Economic Education Specialist
Jeannette Bennett

Jeannette N. Bennett is a senior economic education specialist with the St. Louis Fed’s Memphis Branch.

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These essays from our education specialists cover economic and personal finance basics. Special versions are available for classroom use. Views expressed are not necessarily those of the St. Louis Fed or Federal Reserve System.


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