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Estimated Tax worksheet

Grade 7 · 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
    • Self-employment net profit for 2026 (optional): $60,000
    • Total tax on your 2025 return (optional): $9,500
    • 2025 adjusted gross income (optional): $82,500

    Find: Estimated tax payment each quarter

  2. Problem 2.
    • Filing status (2026): Married filing jointly
    • Self-employment net profit for 2026 (optional): $48,000
    • Total tax on your 2025 return (optional): $8,750
    • 2025 adjusted gross income (optional): $60,000

    Find: Estimated tax payment each quarter

  3. Problem 3.
    • Filing status (2026): Married filing jointly
    • Self-employment net profit for 2026 (optional): $60,000
    • Total tax on your 2025 return (optional): $9,000
    • 2025 adjusted gross income (optional): $82,500

    Find: Estimated tax payment each quarter

  4. Problem 4.
    • Filing status (2026): Married filing jointly
    • Self-employment net profit for 2026 (optional): $45,000
    • Total tax on your 2025 return (optional): $7,400
    • 2025 adjusted gross income (optional): $75,000

    Find: Estimated tax payment each quarter

  5. Problem 5.
    • Filing status (2026): Married filing separately
    • Self-employment net profit for 2026 (optional): $60,000
    • Total tax on your 2025 return (optional): $13,000
    • 2025 adjusted gross income (optional): $60,000

    Find: Estimated tax payment each quarter

  6. Problem 6.
    • Filing status (2026): Married filing jointly
    • Self-employment net profit for 2026 (optional): $80,000
    • Total tax on your 2025 return (optional): $10,000
    • 2025 adjusted gross income (optional): $70,000

    Find: Estimated tax payment each quarter

  7. Problem 7.
    • Filing status (2026): Married filing jointly
    • Self-employment net profit for 2026 (optional): $60,000
    • Total tax on your 2025 return (optional): $10,000
    • 2025 adjusted gross income (optional): $67,500

    Find: Estimated tax payment each quarter

  8. Problem 8.
    • Filing status (2026): Single
    • Self-employment net profit for 2026 (optional): $60,000
    • Total tax on your 2025 return (optional): $6,000
    • 2025 adjusted gross income (optional): $65,000

    Find: Estimated tax payment each quarter

  9. Problem 9.
    • Filing status (2026): Single
    • Self-employment net profit for 2026 (optional): $75,000
    • Total tax on your 2025 return (optional): $7,700
    • 2025 adjusted gross income (optional): $80,000

    Find: Estimated tax payment each quarter

  10. Problem 10.
    • Filing status (2026): Single
    • Self-employment net profit for 2026 (optional): $70,000
    • Total tax on your 2025 return (optional): $6,000
    • 2025 adjusted gross income (optional): $75,000

    Find: Estimated tax payment each quarter

Answer key: Estimated Tax worksheet

  1. 1. Estimated tax payment each quarter: $2,612.50

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$8,477.73
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $60,000.00−$4,238.87=$55,761.14
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing separately filers

      $55,761.14−$16,100.00=$39,661.14
    4. Work out income tax from the 2026 rate brackets (your top rate is 12%)

      income tax=$4,511.34
    5. Add up your total 2026 tax: income tax + self-employment tax

      $4,511.34+$8,477.73=$12,989.07
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $12,989.07×90%=$11,690.16
    7. Safe harbor 2: 110% of last year's (2025) tax (2025 AGI over $75,000.00). You only need to pay the smaller of the two

      $9,500.00×110%=$10,450.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $10,450.004=$2,612.50
  2. 2. Estimated tax payment each quarter: $1,805.19

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$6,782.18
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $48,000.00−$3,391.09=$44,608.91
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers

      $44,608.91−$32,200.00=$12,408.91
    4. Work out income tax from the 2026 rate brackets (your top rate is 10%)

      income tax=$1,240.89
    5. Add up your total 2026 tax: income tax + self-employment tax

      $1,240.89+$6,782.18=$8,023.07
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $8,023.07×90%=$7,220.77
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $8,750.00×100%=$8,750.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $7,220.774=$1,805.19
  3. 3. Estimated tax payment each quarter: $2,250.00

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$8,477.73
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $60,000.00−$4,238.87=$55,761.14
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers

      $55,761.14−$32,200.00=$23,561.14
    4. Work out income tax from the 2026 rate brackets (your top rate is 10%)

      income tax=$2,356.11
    5. Add up your total 2026 tax: income tax + self-employment tax

      $2,356.11+$8,477.73=$10,833.84
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $10,833.84×90%=$9,750.46
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $9,000.00×100%=$9,000.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $9,000.004=$2,250.00
  4. 4. Estimated tax payment each quarter: $1,647.09

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$6,358.30
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $45,000.00−$3,179.15=$41,820.85
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers

      $41,820.85−$32,200.00=$9,620.85
    4. Work out income tax from the 2026 rate brackets (your top rate is 10%)

      income tax=$962.09
    5. Add up your total 2026 tax: income tax + self-employment tax

      $962.09+$6,358.30=$7,320.38
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $7,320.38×90%=$6,588.34
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $7,400.00×100%=$7,400.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $6,588.344=$1,647.09
  5. 5. Estimated tax payment each quarter: $2,922.54

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$8,477.73
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $60,000.00−$4,238.87=$55,761.14
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing separately filers

      $55,761.14−$16,100.00=$39,661.14
    4. Work out income tax from the 2026 rate brackets (your top rate is 12%)

      income tax=$4,511.34
    5. Add up your total 2026 tax: income tax + self-employment tax

      $4,511.34+$8,477.73=$12,989.07
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $12,989.07×90%=$11,690.16
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $13,000.00×100%=$13,000.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $11,690.164=$2,922.54
  6. 6. Estimated tax payment each quarter: $2,500.00

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$11,303.64
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $80,000.00−$5,651.82=$74,348.18
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers

      $74,348.18−$32,200.00=$42,148.18
    4. Work out income tax from the 2026 rate brackets (your top rate is 12%)

      income tax=$4,561.78
    5. Add up your total 2026 tax: income tax + self-employment tax

      $4,561.78+$11,303.64=$15,865.42
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $15,865.42×90%=$14,278.88
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $10,000.00×100%=$10,000.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $10,000.004=$2,500.00
  7. 7. Estimated tax payment each quarter: $2,437.61

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$8,477.73
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $60,000.00−$4,238.87=$55,761.14
    3. Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers

      $55,761.14−$32,200.00=$23,561.14
    4. Work out income tax from the 2026 rate brackets (your top rate is 10%)

      income tax=$2,356.11
    5. Add up your total 2026 tax: income tax + self-employment tax

      $2,356.11+$8,477.73=$10,833.84
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $10,833.84×90%=$9,750.46
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $10,000.00×100%=$10,000.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $9,750.464=$2,437.61
  8. 8. Estimated tax payment each quarter: $1,500.00

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$8,477.73
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $60,000.00−$4,238.87=$55,761.14
    3. Find your taxable income: AGI minus the 2026 standard deduction for single filers

      $55,761.14−$16,100.00=$39,661.14
    4. Work out income tax from the 2026 rate brackets (your top rate is 12%)

      income tax=$4,511.34
    5. Add up your total 2026 tax: income tax + self-employment tax

      $4,511.34+$8,477.73=$12,989.07
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $12,989.07×90%=$11,690.16
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $6,000.00×100%=$6,000.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $6,000.004=$1,500.00
  9. 9. Estimated tax payment each quarter: $1,925.00

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$10,597.16
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $75,000.00−$5,298.58=$69,701.42
    3. Find your taxable income: AGI minus the 2026 standard deduction for single filers

      $69,701.42−$16,100.00=$53,601.42
    4. Work out income tax from the 2026 rate brackets (your top rate is 22%)

      income tax=$6,504.31
    5. Add up your total 2026 tax: income tax + self-employment tax

      $6,504.31+$10,597.16=$17,101.47
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $17,101.47×90%=$15,391.33
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $7,700.00×100%=$7,700.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $7,700.004=$1,925.00
  10. 10. Estimated tax payment each quarter: $1,500.00

    1. Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap

      SE tax=$9,890.69
    2. Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract

      $70,000.00−$4,945.34=$65,054.66
    3. Find your taxable income: AGI minus the 2026 standard deduction for single filers

      $65,054.66−$16,100.00=$48,954.66
    4. Work out income tax from the 2026 rate brackets (your top rate is 12%)

      income tax=$5,626.56
    5. Add up your total 2026 tax: income tax + self-employment tax

      $5,626.56+$9,890.69=$15,517.24
    6. Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax

      $15,517.24×90%=$13,965.52
    7. Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two

      $6,000.00×100%=$6,000.00
    8. Split it into 4 equal payments: the amount you need divided by 4

      $6,000.004=$1,500.00