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TD Bank WOW!Zone 1 Grades 9-12/Lesson 9
Worksheet: Calculating Marginal vs. Average Taxes
Worksheet, with answers (Teacher Copy)
Federal Tax Brackets and Rates in 2011 for Single Persons
From: To: Taxed at Marginal Rate of:
$0 $8,500 10%
$8,501 $34,500 15%
$34,501 $83,600 25%
$83,601 $174,400 28%
$174,401 $379,150 33%
$379,151+ 35%
Directions: Answer the following questions using the 2011 U.S. marginal income tax rates for a single individual.
If Jaime earns $10,000 from a job that he works after school and during the summer, how much federal income tax does he owe given the table above?
($8,500 x .10) + ($10,000 - $8,500 x .15), or ($850 + $225) = $1,075 owed in taxes
What is Jaime’s marginal tax rate, that is on the highest dollar?
15%. This means that Jaime is in the “15% tax bracket.”
What is Jaime’s average tax rate?
This is $1,075 ÷ $10,000 = 10.75%. Jaime’s average tax rate (liability) is less than is marginal tax rate because not every dollar of income was taxed at the highest rate. The first $8,500 was taxed at 10% and the next $1,500 was taxed at 25%.
Suppose the personal exemption for Jaime is $3,700. How much federal tax would he owe?
Taxable income = ($10,000 - $3,700) = $6,
How does this change Jaime’s marginal tax rate? Average tax rate? How much taxes does he now owe?
TD Bank WOW!Zone 2 Grades 9-12/Lesson 9
Jaime’s marginal tax rate is now 10% for all of his taxable income. ($6,300 x .10) = $630 owed in taxes. Jaime’s new average tax rate is = $630/$6,300 or 10%, equal to his marginal rate because all of his taxable income is in the lowest tax bracket.
If Tameka earns $50,000 from her job as an accountant, how much federal income tax does she owe based on the above table?
- Tameka’s first $8,500 is taxed at 10%
- Tameka’s next (34,500 - $8,500) or $26,000 is taxed at 15%
- Tameka’s last (50,000 - $34,500) or $15,000 is taxed at 25%
($8,500 x .10) + ($26,000 x .15) + ($15,500 x .25) ($850 + $3,900 + $3,875) = $8,625 owed in taxes
What is Tameka’s marginal tax rate, that is, on the highest dollar?
25%. This means that Jaime is in the “25% tax bracket.”
What is Tameka’s average tax rate?
This is $8,625 ÷ $50,000 = 17.25%. Tameka’s average tax rate (liability) is less than is marginal tax rate because not every dollar of income was taxed at the highest rate. The first $8,500 was taxed at 10%, the next $26,000 was taxed at 25%, and the final $3,875 was taxed at 25%.
Suppose the personal exemption for Tameka is $3,700 for herself and $3,700 for each of her 3 children. How much federal tax would he owe?
Taxable income = ($50,000 - $3,700 x 4) = ($50,000 - $14,800) = $35,200.
How does this change Tameka’s marginal tax rate? What is her new average tax rate? How much in taxes does she now owe?
Tameka’s marginal tax rate for $35,200 is now just 15%. Her tax liability is also less because of the exemptions:
($8,500 x .10) + ($26,700 x .15) ($850 + $4,050) = $4,900 owed in taxes
Her new average tax rate is = $4,900/$35,200 or 13.9%, less than her marginal tax rate. Note: Upon completing her income tax forms, Tameka would find that her tax bill would be reduced even further (lower than $4,900) when she includes the allowed federal standard deduction or alternatively if she itemizes deductions.
