Single
Married Filing Jointly
Head of Household
Qualifying Widow(er)
Married Filing Separately
Estimated New Jersey Income Tax
$0.00
Understanding New Jersey Income Tax
New Jersey has a progressive income tax system, meaning tax rates increase as income rises. The state also offers various deductions and credits that can reduce your overall tax liability. This calculator provides an estimate of your New Jersey income tax based on the information you provide.
How New Jersey Income Tax Works
New Jersey income tax is calculated on taxable income, which is your gross income minus certain deductions. The state uses a tiered tax bracket system, where different portions of your income are taxed at different rates.
Key Components for Calculation:
Gross Income: This is your total income from all sources before any deductions or exemptions.
Filing Status: Your filing status (Single, Married Filing Jointly, etc.) affects the tax brackets and exemption amounts.
Exemptions: New Jersey allows personal and dependent exemptions. Each exemption reduces your taxable income by a specific amount, which changes annually.
Deductions: Beyond standard exemptions, New Jersey allows specific deductions such as:
Medical Expenses: Only the amount exceeding 2% of your Adjusted Gross Income (AGI) is deductible.
Student Loan Interest: You can deduct interest paid on qualified student loans.
Property Tax Deduction: For eligible taxpayers, a deduction for property taxes paid can significantly reduce taxable income. There are caps on this deduction.
Tax Brackets: Your taxable income is then applied to the relevant New Jersey tax brackets to determine the tax liability.
NJ Tax Brackets and Exemption Values (Illustrative – Actuals may vary annually):
Note: The following tax brackets and exemption values are for illustrative purposes and may not reflect the most current tax year. Always consult the official New Jersey Division of Taxation for the latest figures.
Single: Tax rate starts at 1.4% for the first bracket, increasing with income.
Married Filing Jointly: Similar bracket structure but with higher income thresholds.
Head of Household: Generally falls between Single and Married Filing Jointly.
Qualifying Widow(er): Usually treated the same as Married Filing Jointly.
Married Filing Separately: Often has lower income thresholds and may result in higher tax liability compared to filing jointly.
Exemption Values (Example):
Standard Exemption: ~$3,500 per taxpayer (varies by income)
Dependent Exemption: ~$1,500 per dependent (varies by income)
Tax Rate Schedule (Example for Single Filer – Simplified):
Up to $1,000: 1.4%
$1,001 to $3,500: 1.75%
$3,501 to $5,000: 2.45%
…and so on, with increasing rates and income tiers.
How This Calculator Works:
This calculator attempts to estimate your New Jersey income tax by:
Calculating your Adjusted Gross Income (AGI) by subtracting certain deductions from your Gross Income.
Determining your total exemptions based on filing status and number of dependents.
Calculating your Taxable Income (AGI minus Exemptions).
Applying the relevant New Jersey tax brackets to your Taxable Income.
Summing the tax from each bracket to arrive at the estimated tax liability.
Important Disclaimer: This calculator is for informational purposes only and should not be considered a substitute for professional tax advice. Tax laws are complex and subject to change. The calculations are estimates and may not account for all specific circumstances or the latest tax legislation. Consult a qualified tax professional for advice tailored to your situation.
function calculateNJTaxes() {
var grossIncome = parseFloat(document.getElementById("grossIncome").value);
var filingStatus = document.getElementById("filingStatus").value;
var dependents = parseInt(document.getElementById("dependents").value);
var medicalExpenses = parseFloat(document.getElementById("medicalExpenses").value);
var studentLoanInterest = parseFloat(document.getElementById("studentLoanInterest").value);
var propertyTaxPaid = parseFloat(document.getElementById("propertyTaxPaid").value);
var taxResultElement = document.getElementById("taxResult");
if (isNaN(grossIncome) || grossIncome < 0) {
taxResultElement.innerText = "Please enter a valid Gross Income.";
return;
}
if (isNaN(dependents) || dependents < 0) {
dependents = 0; // Default to 0 if invalid
}
if (isNaN(medicalExpenses) || medicalExpenses < 0) {
medicalExpenses = 0;
}
if (isNaN(studentLoanInterest) || studentLoanInterest < 0) {
studentLoanInterest = 0;
}
if (isNaN(propertyTaxPaid) || propertyTaxPaid 2% AGI, Student Loan Interest, Property Tax)
// 3. Exemptions (Personal, Spouse, Dependent)
// 4. Taxable Income = Gross Income – Deductions – Exemptions
// 5. Apply progressive tax brackets to Taxable Income.
// Approximate exemption amounts (these change annually and based on income phase-outs)
var personalExemptionValue = 0;
var dependentExemptionValue = 0;
var exemptionBase = 3500; // Base for personal exemption (illustrative)
var dependentBase = 1500; // Base for dependent exemption (illustrative)
// Simplified exemption calculation based on filing status (actual NJ rules are more complex)
if (filingStatus === "single" || filingStatus === "married_filing_separately") {
personalExemptionValue = exemptionBase;
} else if (filingStatus === "married_filing_jointly" || filingStatus === "qualifying_widow") {
personalExemptionValue = exemptionBase * 2; // For self and spouse
} else if (filingStatus === "head_of_household") {
personalExemptionValue = exemptionBase; // Simplified – HOH might get more
}
if (dependents > 0) {
dependentExemptionValue = dependentBase * dependents;
}
var totalExemptions = personalExemptionValue + dependentExemptionValue;
// Simplified Deduction Calculations
// Medical Expenses Deduction: Only amount above 2% of AGI. AGI is roughly Gross Income minus some deductions here.
// For simplicity, let's assume AGI is close to Gross Income for this example.
var medicalExpenseAGIAmount = grossIncome * 0.02;
var deductibleMedicalExpenses = Math.max(0, medicalExpenses – medicalExpenseAGIAmount);
// Student Loan Interest Deduction (usually capped)
var deductibleStudentLoanInterest = Math.min(studentLoanInterest, 2500); // Illustrative cap
// Property Tax Deduction (complex rules, caps, and eligibility)
// For simplicity, let's allow a portion of property tax paid, capped.
var deductiblePropertyTax = Math.min(propertyTaxPaid, 15000); // Illustrative cap
var totalDeductions = deductibleMedicalExpenses + deductibleStudentLoanInterest + deductiblePropertyTax;
// Calculate Taxable Income
var taxableIncome = Math.max(0, grossIncome – totalDeductions – totalExemptions);
// — NJ Tax Brackets (Illustrative – Use actual 2023/2024 NJ Tax Tables for accuracy) —
// These rates and brackets are simplified for demonstration.
var tax = 0;
var rates = [];
if (filingStatus === "single") {
rates = [
{ limit: 1000, rate: 0.014 },
{ limit: 3500, rate: 0.0175 },
{ limit: 5000, rate: 0.0245 },
{ limit: 7000, rate: 0.0305 },
{ limit: 8000, rate: 0.035 },
{ limit: 10000, rate: 0.0385 },
{ limit: 15000, rate: 0.0435 },
{ limit: 20000, rate: 0.0475 },
{ limit: 25000, rate: 0.0515 },
{ limit: 40000, rate: 0.0553 },
{ limit: 75000, rate: 0.0637 },
{ limit: 175000, rate: 0.0897 },
{ limit: Infinity, rate: 0.1075 }
];
} else if (filingStatus === "married_filing_jointly") {
rates = [
{ limit: 1500, rate: 0.014 },
{ limit: 5000, rate: 0.0175 },
{ limit: 7000, rate: 0.0245 },
{ limit: 10000, rate: 0.0305 },
{ limit: 12000, rate: 0.035 },
{ limit: 15000, rate: 0.0385 },
{ limit: 20000, rate: 0.0435 },
{ limit: 25000, rate: 0.0475 },
{ limit: 30000, rate: 0.0515 },
{ limit: 50000, rate: 0.0553 },
{ limit: 100000, rate: 0.0637 },
{ limit: 200000, rate: 0.0897 },
{ limit: Infinity, rate: 0.1075 }
];
} else if (filingStatus === "head_of_household") {
rates = [
{ limit: 1000, rate: 0.014 },
{ limit: 3500, rate: 0.0175 },
{ limit: 5000, rate: 0.0245 },
{ limit: 7000, rate: 0.0305 },
{ limit: 8000, rate: 0.035 },
{ limit: 10000, rate: 0.0385 },
{ limit: 15000, rate: 0.0435 },
{ limit: 20000, rate: 0.0475 },
{ limit: 25000, rate: 0.0515 },
{ limit: 40000, rate: 0.0553 },
{ limit: 75000, rate: 0.0637 },
{ limit: 175000, rate: 0.0897 },
{ limit: Infinity, rate: 0.1075 }
]; // Often similar to single, but check official tables
} else if (filingStatus === "qualifying_widow") { // Treated like MFJ
rates = [
{ limit: 1500, rate: 0.014 },
{ limit: 5000, rate: 0.0175 },
{ limit: 7000, rate: 0.0245 },
{ limit: 10000, rate: 0.0305 },
{ limit: 12000, rate: 0.035 },
{ limit: 15000, rate: 0.0385 },
{ limit: 20000, rate: 0.0435 },
{ limit: 25000, rate: 0.0475 },
{ limit: 30000, rate: 0.0515 },
{ limit: 50000, rate: 0.0553 },
{ limit: 100000, rate: 0.0637 },
{ limit: 200000, rate: 0.0897 },
{ limit: Infinity, rate: 0.1075 }
];
} else { // Married Filing Separately
rates = [
{ limit: 1000, rate: 0.014 },
{ limit: 3500, rate: 0.0175 },
{ limit: 5000, rate: 0.0245 },
{ limit: 7000, rate: 0.0305 },
{ limit: 8000, rate: 0.035 },
{ limit: 10000, rate: 0.0385 },
{ limit: 15000, rate: 0.0435 },
{ limit: 20000, rate: 0.0475 },
{ limit: 25000, rate: 0.0515 },
{ limit: 40000, rate: 0.0553 },
{ limit: 75000, rate: 0.0637 },
{ limit: 175000, rate: 0.0897 },
{ limit: Infinity, rate: 0.1075 }
]; // Often similar to single, but check official tables
}
var remainingIncome = taxableIncome;
var previousLimit = 0;
for (var i = 0; i < rates.length; i++) {
var bracket = rates[i];
var bracketIncome = 0;
if (remainingIncome <= 0) break;
if (bracket.limit === Infinity) {
bracketIncome = remainingIncome;
} else {
bracketIncome = Math.min(remainingIncome, bracket.limit – previousLimit);
}
tax += bracketIncome * bracket.rate;
remainingIncome -= bracketIncome;
previousLimit = bracket.limit;
}
// Display the result
taxResultElement.innerText = "$" + tax.toFixed(2);
}