Independent Contractor vs Employee Tax Liability Calculator
ANA›Life Services Authority›National Calculator Authority›Independent Contractor vs Employee Tax Liability Calculator
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Independent Contractor vs Employee Tax Liability Calculator
Compare your total federal tax liability as an independent contractor (1099) versus a W-2 employee. See the impact of self-employment tax, the QBI deduction, and employer-paid FICA on your bottom line.
Gross Annual Income ($)
Filing Status
Single Married Filing Jointly Head of Household
Business Expenses / Deductions ($) (contractors only)
Other Itemized / Above-the-Line Deductions ($)
Retirement Contributions ($) (401k/SEP-IRA, pre-tax)
Calculate
function indCalc() { // ── Inputs ────────────────────────────────────────────────────────────── const income = parseFloat(document.getElementById('ind-income').value) || 0; const filing = document.getElementById('ind-filing').value; const bizExp = parseFloat(document.getElementById('ind-business-exp').value) || 0; const otherDed = parseFloat(document.getElementById('ind-other-deductions').value) || 0; const retirement = parseFloat(document.getElementById('ind-retirement').value) || 0; const resultDiv = document.getElementById('ind-result');
// ── Validation ─────────────────────────────────────────────────────────── if (income income) { resultDiv.innerHTML = 'Business expenses cannot exceed gross income.
'; return; } if (retirement > 69000) { resultDiv.innerHTML = 'Retirement contributions cannot exceed the 2024 IRS limit of $69,000.
'; return; }
// ── 2024 Constants ─────────────────────────────────────────────────────── const SE_RATE = 0.1530; // 15.3% self-employment tax (SS 12.4% + Medicare 2.9%) const SS_WAGE_BASE = 168600; // 2024 Social Security wage base const SS_RATE = 0.124; const MED_RATE = 0.029; const ADD_MED_RATE = 0.009; // Additional Medicare tax above threshold const ADD_MED_THRESH = { single: 200000, mfj: 250000, hoh: 200000 }; const EMP_FICA_RATE = 0.0765; // Employee share of FICA (7.65%) const QBI_RATE = 0.20; // Section 199A QBI deduction
// 2024 Standard deductions const STD_DED = { single: 14600, mfj: 29200, hoh: 21900 };
// 2024 Federal income tax brackets (taxable income, rate) const BRACKETS = { single: [ [11600, 0.10], [47150, 0.12], [100525, 0.22], [191950, 0.24], [243725, 0.32], [609350, 0.35], [Infinity, 0.37] ], mfj: [ [23200, 0.10], [94300, 0.12], [201050, 0.22], [383900, 0.24], [487450, 0.32], [731200, 0.35], [Infinity, 0.37] ], hoh: [ [16550, 0.10], [63100, 0.12], [100500, 0.22], [191950, 0.24], [243700, 0.32], [609350, 0.35], [Infinity, 0.37] ] };
function calcIncomeTax(taxableIncome, filingStatus) { if (taxableIncome 0 ? (tax / income * 100).toFixed(2) : '0.00'; }
// ════════════════════════════════════════════════════════════════════════ // INDEPENDENT CONTRACTOR (1099) // ════════════════════════════════════════════════════════════════════════
// Net self-employment income (after business expenses) const netSEIncome = Math.max(0, income - bizExp);
// Self-employment tax on 92.35% of net SE income // (mirrors the employer/employee split — you only pay SE tax on 92.35%) const seBase = netSEIncome * 0.9235;
// SS portion capped at wage base const ssSE = Math.min(seBase, SS_WAGE_BASE) * SS_RATE; // Medicare portion uncapped const medSE = seBase * MED_RATE; // Additional Medicare (above threshold) const addMedSE = Math.max(0, seBase - ADD_MED_THRESH[filing]) * ADD_MED_RATE; const seTax = ssSE + medSE + addMedSE;
// Deduction: 50% of SE tax is above-the-line deductible const seDeduction = seTax * 0.50;
// AGI for contractor const agiContractor = Math.max(0, netSEIncome - seDeduction - retirement - otherDed);
// QBI deduction: 20% of qualified business income // (simplified: QBI = net SE income; phase-outs not modeled here) const qbiDeduction = netSEIncome * QBI_RATE;
// Taxable income: use greater of standard deduction or (other itemized) const stdDed = STD_DED[filing]; const totalBelowLineContractor = Math.max(stdDed, 0) + qbiDeduction; const taxableContractor = Math.max(0, agiContractor - totalBelowLineContractor);
const incomeTaxContractor = calcIncomeTax(taxableContractor, filing); const totalTaxContractor = incomeTaxContractor + seTax; const takeHomeContractor = income - bizExp - totalTaxContractor - retirement;
// ════════════════════════════════════════════════════════════════════════ // W-2 EMPLOYEE // ════════════════════════════════════════════════════════════════════════
// Employee pays 7.65% FICA (employer pays matching 7.65% — not your cost) const ssEmp = Math.min(income, SS_WAGE_BASE) * (SS_RATE / 2); const medEmp = income * (MED_RATE / 2); const addMedEmp = Math.max(0, income - ADD_MED_THRESH[filing]) * ADD_MED_RATE; const ficaEmployee = ssEmp + medEmp + addMedEmp;
// Employer cost (informational — not paid by employee) const ssEmployer = Math.min(income, SS_WAGE_BASE) * (SS_RATE / 2); const medEmployer = income * (MED_RATE / 2); const ficaEmployer = ssEmployer + medEmployer;
// AGI for employee (retirement is pre-tax 401k) const agiEmployee = Math.max(0, income - retirement - otherDed);
// Taxable income const taxableEmployee = Math.max(0, agiEmployee - stdDed);
const incomeTaxEmployee = calcIncomeTax(taxableEmployee, filing); const totalTaxEmployee = incomeTaxEmployee + ficaEmployee; const takeHomeEmployee = income - totalTaxEmployee - retirement;
// ── Difference ─────────────────────────────────────────────────────────── const taxDiff = totalTaxContractor - totalTaxEmployee; const takeHomeDiff = takeHomeContractor - takeHomeEmployee;
// ── Format helpers ─────────────────────────────────────────────────────── const fmt = v => '$' + v.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2}); const pct = (v, base) => base > 0 ? (v / base * 100).toFixed(1) + '%' : '0.0%';
// ── Render ─────────────────────────────────────────────────────────────── resultDiv.innerHTML = ` ### Results Summary
Item Independent Contractor (1099) W-2 Employee
Gross Income${fmt(income)}${fmt(income)} Business Expenses${fmt(bizExp)}— Net Self-Employment Income${fmt(netSEIncome)}— SE Tax Deduction (50% of SE Tax)${fmt(seDeduction)}— Retirement Contributions${fmt(retirement)}${fmt(retirement)} Adjusted Gross Income (AGI)${fmt(agiContractor)}${fmt(agiEmployee)} Standard Deduction${fmt(stdDed)}${fmt(stdDed)} QBI Deduction (20%)${fmt(qbiDeduction)}— Taxable Income${fmt(taxableContractor)}${fmt(taxableEmployee)} Federal Income Tax${fmt(incomeTaxContractor)}${fmt(incomeTaxEmployee)} Self-Employment / FICA Tax${fmt(seTax)} (SE Tax)${fmt(ficaEmployee)} (Employee FICA) Employer FICA (not your cost)—${fmt(ficaEmployer)} Total Tax Liability${fmt(totalTaxContractor)}${fmt(totalTaxEmployee)} Effective Tax Rate${effectiveRate(totalTaxContractor, income)}%${effectiveRate(totalTaxEmployee, income)}% Estimated Take-Home Pay${fmt(takeHomeContractor)}${fmt(takeHomeEmployee)}
- Tax Difference (Contractor − Employee):
- ${taxDiff >= 0
- ?
You pay **${fmt(taxDiff)}** MORE in taxes as a contractor. You pay **${fmt(Math.abs(taxDiff))}** LESS in taxes as a contractor.}- Take-Home Difference:
- ${takeHomeDiff >= 0
- ?
Contractor take-home is **${fmt(takeHomeDiff)}** higher. Employee take-home is **${fmt(Math.abs(takeHomeDiff))}** higher.} Note: Does not include employer-provided benefits (health insurance, 401k match, PTO) which add ~20–30% to employee total compensation.
`; }
#### Formulas Used
Independent Contractor:
- SE Tax Base = Net SE Income × 0.9235 (IRS statutory reduction)
- QBI Deduction = Net SE Income × 20% (IRC §199A)
W-2 Employee:
2024 Federal Tax Brackets (Single / MFJ / HOH): 10%, 12%, 22%, 24%, 32%, 35%, 37% — applied progressively per IRS Publication 505.
#### Assumptions & References
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