Name Date
Estimated Tax worksheet
Grade 7 · CCSS 7.RP.A.3
Calcapedia 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer
- 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
Answer key: Estimated Tax worksheet
Calcapedia 1. Estimated tax payment each quarter: $2,612.50
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing separately filers
Work out income tax from the 2026 rate brackets (your top rate is 12%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
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
Split it into 4 equal payments: the amount you need divided by 4
2. Estimated tax payment each quarter: $1,805.19
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers
Work out income tax from the 2026 rate brackets (your top rate is 10%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
3. Estimated tax payment each quarter: $2,250.00
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers
Work out income tax from the 2026 rate brackets (your top rate is 10%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
4. Estimated tax payment each quarter: $1,647.09
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers
Work out income tax from the 2026 rate brackets (your top rate is 10%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
5. Estimated tax payment each quarter: $2,922.54
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing separately filers
Work out income tax from the 2026 rate brackets (your top rate is 12%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
6. Estimated tax payment each quarter: $2,500.00
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers
Work out income tax from the 2026 rate brackets (your top rate is 12%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
7. Estimated tax payment each quarter: $2,437.61
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for married filing jointly filers
Work out income tax from the 2026 rate brackets (your top rate is 10%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
8. Estimated tax payment each quarter: $1,500.00
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for single filers
Work out income tax from the 2026 rate brackets (your top rate is 12%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
9. Estimated tax payment each quarter: $1,925.00
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for single filers
Work out income tax from the 2026 rate brackets (your top rate is 22%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4
10. Estimated tax payment each quarter: $1,500.00
Find your self-employment tax: 15.3% of 92.35% of your net profit. The Social Security part stops at the yearly earnings cap
Find your adjusted gross income (AGI): all your income minus half of the self-employment tax, which the IRS lets you subtract
Find your taxable income: AGI minus the 2026 standard deduction for single filers
Work out income tax from the 2026 rate brackets (your top rate is 12%)
Add up your total 2026 tax: income tax + self-employment tax
Safe harbor 1, a minimum that avoids the penalty: 90% of your 2026 tax
Safe harbor 2: 100% of last year's (2025) tax. You only need to pay the smaller of the two
Split it into 4 equal payments: the amount you need divided by 4