,Test Bank for South-Western Federal Taxation 2026: Individual Income Taxes, 49th Edition
Chapter 1: An Introduction to Taxation and Understanding the Federal Tax Law
Multiple-Choice Questions (Questions 1–50)
Question 1: Which of the following is the primary source of federal tax law in the United States?
A) Treasury Regulations
B) Internal Revenue Code
C) IRS Revenue Rulings
D) Tax Court decisions
Correct Answer: B
Rationale: The Internal Revenue Code is the primary statutory source of federal tax law, enacted by
Congress. Treasury Regulations interpret the Code but are secondary authority. Revenue Rulings are
administrative guidance. Tax Court decisions are judicial interpretations.
Question 2: The ability-to-pay concept is the basis for which characteristic of the federal tax system?
A) Proportional taxes
B) Regressive taxes
C) Progressive taxes
D) Flat taxes
Correct Answer: C
Rationale: The ability-to-pay concept holds that taxpayers with higher incomes should pay a larger
proportion of their income in taxes, which is the basis for progressive taxation.
Question 3: A tax that takes a larger percentage of income from low-income taxpayers than from high-
income taxpayers is called:
A) Progressive
B) Proportional
C) Regressive
D) Flat
Correct Answer: C
Rationale: A regressive tax takes a larger percentage of income from low-income taxpayers. Examples
include sales taxes and Social Security taxes.
Question 4: Which of the following is an example of a regressive tax?
A) Federal income tax
B) State income tax
C) Social Security tax
D) Estate tax
Correct Answer: C
Rationale: The Social Security tax is regressive because it applies only to wages up to a certain cap,
resulting in lower-income taxpayers paying a higher effective rate.
,Question 5: The marginal tax rate is:
A) The total tax divided by total income
B) The tax rate applied to the next dollar of income
C) The average tax rate on all income
D) The tax rate on the first dollar of income
Correct Answer: B
Rationale: The marginal tax rate is the rate applied to the next dollar of taxable income.
Question 6: The average tax rate is calculated as:
A) Total tax divided by taxable income
B) Total tax divided by total income
C) Marginal tax rate times taxable income
D) Total income divided by total tax
Correct Answer: A
Rationale: The average tax rate equals total tax liability divided by taxable income.
Question 7: Which of the following is NOT a characteristic of a good tax system?
A) Equity
B) Certainty
C) Complexity
D) Convenience
Correct Answer: C
Rationale: A good tax system should be equitable, certain, convenient, and efficient. Complexity is
generally considered undesirable.
Question 8: Horizontal equity means:
A) Taxpayers with similar incomes should pay similar taxes
B) Taxpayers with different incomes should pay different taxes
C) Taxpayers with higher incomes should pay more taxes
D) Taxpayers with lower incomes should pay less taxes
Correct Answer: A
Rationale: Horizontal equity requires that taxpayers in similar situations pay similar amounts of tax.
Question 9: Vertical equity means:
A) Taxpayers with similar incomes should pay similar taxes
B) Taxpayers with different incomes should pay different taxes
C) All taxpayers should pay the same tax
D) Taxpayers should pay taxes based on consumption
Correct Answer: B
Rationale: Vertical equity requires that taxpayers with different abilities to pay should pay different
amounts of tax.
Question 10: Which constitutional amendment gave Congress the power to levy an income tax?
A) Sixteenth Amendment
, B) Fourteenth Amendment
C) Fifth Amendment
D) Tenth Amendment
Correct Answer: A
Rationale: The Sixteenth Amendment, ratified in 1913, gave Congress the power to levy taxes on income
without apportionment among the states.
Question 11: The primary purpose of the federal income tax is to:
A) Regulate behavior
B) Raise revenue
C) Redistribute wealth
D) Control inflation
Correct Answer: B
Rationale: The primary purpose of the federal income tax is to raise revenue to fund government
operations.
Question 12: Which of the following is an example of an excise tax?
A) Federal income tax
B) State sales tax
C) Tax on gasoline
D) Property tax
Correct Answer: C
Rationale: An excise tax is imposed on specific goods or services, such as gasoline, tobacco, and alcohol.
Question 13: A use tax is imposed on:
A) The sale of goods
B) The use, storage, or consumption of goods
C) The ownership of property
D) The transfer of wealth at death
Correct Answer: B
Rationale: A use tax is imposed on the use, storage, or consumption of goods, typically when sales tax
was not collected at the point of sale.
Question 14: Which of the following is an example of a wealth transfer tax?
A) Sales tax
B) Property tax
C) Estate tax
D) Excise tax
Correct Answer: C
Rationale: The estate tax is a wealth transfer tax imposed on the transfer of wealth at death.
Question 15: The unified gift and estate tax system means:
A) Gift and estate taxes are separate and unrelated
B) Gift and estate taxes share a single exemption amount
Chapter 1: An Introduction to Taxation and Understanding the Federal Tax Law
Multiple-Choice Questions (Questions 1–50)
Question 1: Which of the following is the primary source of federal tax law in the United States?
A) Treasury Regulations
B) Internal Revenue Code
C) IRS Revenue Rulings
D) Tax Court decisions
Correct Answer: B
Rationale: The Internal Revenue Code is the primary statutory source of federal tax law, enacted by
Congress. Treasury Regulations interpret the Code but are secondary authority. Revenue Rulings are
administrative guidance. Tax Court decisions are judicial interpretations.
Question 2: The ability-to-pay concept is the basis for which characteristic of the federal tax system?
A) Proportional taxes
B) Regressive taxes
C) Progressive taxes
D) Flat taxes
Correct Answer: C
Rationale: The ability-to-pay concept holds that taxpayers with higher incomes should pay a larger
proportion of their income in taxes, which is the basis for progressive taxation.
Question 3: A tax that takes a larger percentage of income from low-income taxpayers than from high-
income taxpayers is called:
A) Progressive
B) Proportional
C) Regressive
D) Flat
Correct Answer: C
Rationale: A regressive tax takes a larger percentage of income from low-income taxpayers. Examples
include sales taxes and Social Security taxes.
Question 4: Which of the following is an example of a regressive tax?
A) Federal income tax
B) State income tax
C) Social Security tax
D) Estate tax
Correct Answer: C
Rationale: The Social Security tax is regressive because it applies only to wages up to a certain cap,
resulting in lower-income taxpayers paying a higher effective rate.
,Question 5: The marginal tax rate is:
A) The total tax divided by total income
B) The tax rate applied to the next dollar of income
C) The average tax rate on all income
D) The tax rate on the first dollar of income
Correct Answer: B
Rationale: The marginal tax rate is the rate applied to the next dollar of taxable income.
Question 6: The average tax rate is calculated as:
A) Total tax divided by taxable income
B) Total tax divided by total income
C) Marginal tax rate times taxable income
D) Total income divided by total tax
Correct Answer: A
Rationale: The average tax rate equals total tax liability divided by taxable income.
Question 7: Which of the following is NOT a characteristic of a good tax system?
A) Equity
B) Certainty
C) Complexity
D) Convenience
Correct Answer: C
Rationale: A good tax system should be equitable, certain, convenient, and efficient. Complexity is
generally considered undesirable.
Question 8: Horizontal equity means:
A) Taxpayers with similar incomes should pay similar taxes
B) Taxpayers with different incomes should pay different taxes
C) Taxpayers with higher incomes should pay more taxes
D) Taxpayers with lower incomes should pay less taxes
Correct Answer: A
Rationale: Horizontal equity requires that taxpayers in similar situations pay similar amounts of tax.
Question 9: Vertical equity means:
A) Taxpayers with similar incomes should pay similar taxes
B) Taxpayers with different incomes should pay different taxes
C) All taxpayers should pay the same tax
D) Taxpayers should pay taxes based on consumption
Correct Answer: B
Rationale: Vertical equity requires that taxpayers with different abilities to pay should pay different
amounts of tax.
Question 10: Which constitutional amendment gave Congress the power to levy an income tax?
A) Sixteenth Amendment
, B) Fourteenth Amendment
C) Fifth Amendment
D) Tenth Amendment
Correct Answer: A
Rationale: The Sixteenth Amendment, ratified in 1913, gave Congress the power to levy taxes on income
without apportionment among the states.
Question 11: The primary purpose of the federal income tax is to:
A) Regulate behavior
B) Raise revenue
C) Redistribute wealth
D) Control inflation
Correct Answer: B
Rationale: The primary purpose of the federal income tax is to raise revenue to fund government
operations.
Question 12: Which of the following is an example of an excise tax?
A) Federal income tax
B) State sales tax
C) Tax on gasoline
D) Property tax
Correct Answer: C
Rationale: An excise tax is imposed on specific goods or services, such as gasoline, tobacco, and alcohol.
Question 13: A use tax is imposed on:
A) The sale of goods
B) The use, storage, or consumption of goods
C) The ownership of property
D) The transfer of wealth at death
Correct Answer: B
Rationale: A use tax is imposed on the use, storage, or consumption of goods, typically when sales tax
was not collected at the point of sale.
Question 14: Which of the following is an example of a wealth transfer tax?
A) Sales tax
B) Property tax
C) Estate tax
D) Excise tax
Correct Answer: C
Rationale: The estate tax is a wealth transfer tax imposed on the transfer of wealth at death.
Question 15: The unified gift and estate tax system means:
A) Gift and estate taxes are separate and unrelated
B) Gift and estate taxes share a single exemption amount
