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Income Tax worksheet

Grades 7–8 · CCSS 7.RP.A.3

Solve each problem and show your work. Round answers to 2 decimal places where needed.

  1. Problem 1.
    • Filing status (2026): Married filing separately
    • Gross income for the year: $105,000
    • Deduction: Standard deduction

    Find: 2026 federal income tax

  2. Problem 2.
    • Filing status (2026): Married filing separately
    • Gross income for the year: $85,000
    • Deduction: Itemize
    • Total itemized deductions: $23,000

    Find: 2026 federal income tax

  3. Problem 3.
    • Filing status (2026): Married filing jointly
    • Gross income for the year: $74,000
    • Deduction: Standard deduction

    Find: 2026 federal income tax

  4. Problem 4.
    • Filing status (2026): Single
    • Gross income for the year: $80,000
    • Deduction: Standard deduction

    Find: 2026 federal income tax

  5. Problem 5.
    • Filing status (2026): Married filing separately
    • Gross income for the year: $80,000
    • Deduction: Itemize
    • Total itemized deductions: $35,000

    Find: 2026 federal income tax

  6. Problem 6.
    • Filing status (2026): Single
    • Gross income for the year: $60,000
    • Deduction: Standard deduction

    Find: 2026 federal income tax

  7. Problem 7.
    • Filing status (2026): Married filing separately
    • Gross income for the year: $60,000
    • Deduction: Standard deduction

    Find: 2026 federal income tax

  8. Problem 8.
    • Filing status (2026): Single
    • Gross income for the year: $75,000
    • Deduction: Itemize
    • Total itemized deductions: $45,000

    Find: 2026 federal income tax

  9. Problem 9.
    • Filing status (2026): Head of household
    • Gross income for the year: $62,500
    • Deduction: Itemize
    • Total itemized deductions: $40,000

    Find: 2026 federal income tax

  10. Problem 10.
    • Filing status (2026): Single
    • Gross income for the year: $92,500
    • Deduction: Itemize
    • Total itemized deductions: $24,000

    Find: 2026 federal income tax

Answer key: Income Tax worksheet

  1. 1. 2026 federal income tax: $14,270.00

    1. Use the 2026 standard deduction for married filing separately filers. This part of your income isn't taxed

      deduction=$16,100.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $105,000.00−$16,100.00=$88,900.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $38,000.00×12%=$4,560.00
    5. Tax the slice of your taxable income from $50,400 to $105,700 at 22%

      $38,500.00×22%=$8,470.00
    6. Add up the tax from each slice

      tax before credits=$14,270.00
    7. This is your estimated 2026 federal income tax

      federal income tax=$14,270.00
    8. Find your effective rate: the share of your whole income that goes to federal tax

      $14,270.00$105,000.00=13.59%
  2. 2. 2026 federal income tax: $8,352.00

    1. Use your itemized deductions instead of the standard deduction

      deduction=$23,000.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $85,000.00−$23,000.00=$62,000.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $38,000.00×12%=$4,560.00
    5. Tax the slice of your taxable income from $50,400 to $105,700 at 22%

      $11,600.00×22%=$2,552.00
    6. Add up the tax from each slice

      tax before credits=$8,352.00
    7. This is your estimated 2026 federal income tax

      federal income tax=$8,352.00
    8. Find your effective rate: the share of your whole income that goes to federal tax

      $8,352.00$85,000.00=9.83%
  3. 3. 2026 federal income tax: $4,520.00

    1. Use the 2026 standard deduction for married filing jointly filers. This part of your income isn't taxed

      deduction=$32,200.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $74,000.00−$32,200.00=$41,800.00
    3. Tax the slice of your taxable income from $0 to $24,800 at 10%

      $24,800.00×10%=$2,480.00
    4. Tax the slice of your taxable income from $24,800 to $100,800 at 12%

      $17,000.00×12%=$2,040.00
    5. Add up the tax from each slice

      tax before credits=$4,520.00
    6. This is your estimated 2026 federal income tax

      federal income tax=$4,520.00
    7. Find your effective rate: the share of your whole income that goes to federal tax

      $4,520.00$74,000.00=6.11%
  4. 4. 2026 federal income tax: $8,770.00

    1. Use the 2026 standard deduction for single filers. This part of your income isn't taxed

      deduction=$16,100.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $80,000.00−$16,100.00=$63,900.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $38,000.00×12%=$4,560.00
    5. Tax the slice of your taxable income from $50,400 to $105,700 at 22%

      $13,500.00×22%=$2,970.00
    6. Add up the tax from each slice

      tax before credits=$8,770.00
    7. This is your estimated 2026 federal income tax

      federal income tax=$8,770.00
    8. Find your effective rate: the share of your whole income that goes to federal tax

      $8,770.00$80,000.00=10.96%
  5. 5. 2026 federal income tax: $5,152.00

    1. Use your itemized deductions instead of the standard deduction

      deduction=$35,000.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $80,000.00−$35,000.00=$45,000.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $32,600.00×12%=$3,912.00
    5. Add up the tax from each slice

      tax before credits=$5,152.00
    6. This is your estimated 2026 federal income tax

      federal income tax=$5,152.00
    7. Find your effective rate: the share of your whole income that goes to federal tax

      $5,152.00$80,000.00=6.44%
  6. 6. 2026 federal income tax: $5,020.00

    1. Use the 2026 standard deduction for single filers. This part of your income isn't taxed

      deduction=$16,100.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $60,000.00−$16,100.00=$43,900.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $31,500.00×12%=$3,780.00
    5. Add up the tax from each slice

      tax before credits=$5,020.00
    6. This is your estimated 2026 federal income tax

      federal income tax=$5,020.00
    7. Find your effective rate: the share of your whole income that goes to federal tax

      $5,020.00$60,000.00=8.37%
  7. 7. 2026 federal income tax: $5,020.00

    1. Use the 2026 standard deduction for married filing separately filers. This part of your income isn't taxed

      deduction=$16,100.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $60,000.00−$16,100.00=$43,900.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $31,500.00×12%=$3,780.00
    5. Add up the tax from each slice

      tax before credits=$5,020.00
    6. This is your estimated 2026 federal income tax

      federal income tax=$5,020.00
    7. Find your effective rate: the share of your whole income that goes to federal tax

      $5,020.00$60,000.00=8.37%
  8. 8. 2026 federal income tax: $3,352.00

    1. Use your itemized deductions instead of the standard deduction

      deduction=$45,000.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $75,000.00−$45,000.00=$30,000.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $17,600.00×12%=$2,112.00
    5. Add up the tax from each slice

      tax before credits=$3,352.00
    6. This is your estimated 2026 federal income tax

      federal income tax=$3,352.00
    7. Find your effective rate: the share of your whole income that goes to federal tax

      $3,352.00$75,000.00=4.47%
  9. 9. 2026 federal income tax: $2,346.00

    1. Use your itemized deductions instead of the standard deduction

      deduction=$40,000.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $62,500.00−$40,000.00=$22,500.00
    3. Tax the slice of your taxable income from $0 to $17,700 at 10%

      $17,700.00×10%=$1,770.00
    4. Tax the slice of your taxable income from $17,700 to $67,450 at 12%

      $4,800.00×12%=$576.00
    5. Add up the tax from each slice

      tax before credits=$2,346.00
    6. This is your estimated 2026 federal income tax

      federal income tax=$2,346.00
    7. Find your effective rate: the share of your whole income that goes to federal tax

      $2,346.00$62,500.00=3.75%
  10. 10. 2026 federal income tax: $9,782.00

    1. Use your itemized deductions instead of the standard deduction

      deduction=$24,000.00
    2. Subtract your deductions to find taxable income, the part that's actually taxed (it can't go below zero)

      $92,500.00−$24,000.00=$68,500.00
    3. Tax the slice of your taxable income from $0 to $12,400 at 10%

      $12,400.00×10%=$1,240.00
    4. Tax the slice of your taxable income from $12,400 to $50,400 at 12%

      $38,000.00×12%=$4,560.00
    5. Tax the slice of your taxable income from $50,400 to $105,700 at 22%

      $18,100.00×22%=$3,982.00
    6. Add up the tax from each slice

      tax before credits=$9,782.00
    7. This is your estimated 2026 federal income tax

      federal income tax=$9,782.00
    8. Find your effective rate: the share of your whole income that goes to federal tax

      $9,782.00$92,500.00=10.58%