Finance & Money Calculators

Self Employment Tax Calculator

Estimate self-employment tax and related income effects from net business profit and deduction assumptions.

Self Employment Tax Calculator — Online Calculator

Business Earnings & Setup

IRS Schedule C & SE

Gross 1099 or business revenues minus deductible operating expenses.

Used to determine AGI phase-out thresholds for the Section 199A QBI deduction.

Specified Service Business (SSTB)
Healthcare, Law, Accounting, Consulting, Financial Services, Performing Arts

SSTBs completely lose the 20% QBI deduction if household income exceeds statutory ceilings.

Self-Employment Tax
$14,130
15.3% on 92.35% net profit
Total Tax Deductions
$27,065
50% SE ($7,065) + QBI
Combined Total Tax
$30,175
30.2% Effective Tax Rate

IRS Schedule SE & Form 1040 Calculation Breakdown

Gross Net Profit
Schedule C Line 31
$100,000
Taxable SE Base (92.35%)
Schedule SE Section A Line 4
$92,350
Social Security Portion (12.4%)
Capped at $176,100 wage base limit
$11,451
Medicare Portion (2.9%)
No income cap applies
$2,678
Total Self-Employment Tax (Schedule SE)
Schedule 2 Line 4
$14,130
50% SE Tax Above-the-Line Deduction
Schedule 1 Line 15 (Reduces AGI)
−$7,065
Section 199A QBI Deduction (20%)
Qualified Business Income write-off
−$20,000
Federal Taxable Income Base
Net profit minus above deductions
$72,935
Estimated Federal Income Tax
Based on 22% estimated marginal rate
$16,046
Combined Total Tax Obligation
$30,175
Quarterly Estimated Payments (Form 1040-ES)
Q1: April 15
$7,544
Q2: June 15
$7,544
Q3: Sept 15
$7,544
Q4: Jan 15
$7,544

IRS penalties apply if you owe more than $1,000 at tax time and do not meet safe harbor rules (paying 90% of current year or 100%/110% of prior year tax).

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Disclaimer: This tool provides informational results only and should not be used as professional advice.

The Self-Employment Tax and QBI Calculator estimates self-employment tax from business profit and shows the related QBI or deduction amounts exposed by the component.

Interpretation

Self-employment tax is separate from federal income tax. Business expenses, the 92.35% net-earnings adjustment, Social Security wage base, and deductions can change the final liability.

Questions

Does this include income tax?

Only if the visible component explicitly includes it. Review the form's assumptions.

Is the output a filing amount?

No. It is a planning estimate and does not prepare Schedule SE or a tax return.

Limitations

Verify current IRS rates, wage bases, QBI rules, and business classification before filing.

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