New Jersey Payroll Calculator
Use this calculator to estimate your net pay per pay period in New Jersey, factoring in federal and state taxes, as well as common deductions. This tool helps you understand how your gross earnings translate into your take-home pay.
Understanding Your New Jersey Paycheck
A payroll calculator is an essential tool for anyone working in New Jersey. It helps you estimate your take-home pay by breaking down your gross earnings into various deductions, including federal and state taxes. Understanding these components is crucial for personal financial planning.
Key Components of Your NJ Paycheck:
Your gross pay is the total amount you earn before any deductions. From this, several amounts are withheld:
- Federal Income Tax (FIT): This is a progressive tax levied by the U.S. government. The amount withheld depends on your gross pay, filing status (Single, Married Filing Jointly, Head of Household), and the number of dependents you claim on your W-4 form.
- Social Security Tax (FICA – SS): This funds retirement, disability, and survivor benefits. Employees contribute 6.2% of their earnings up to an annual wage base limit (e.g., $168,600 for 2024).
- Medicare Tax (FICA – Med): This funds hospital insurance for the elderly and disabled. Employees contribute 1.45% of all earnings, with no wage base limit. An additional 0.9% Medicare tax applies to earnings above certain thresholds ($200,000 for single filers, $250,000 for married filing jointly).
- New Jersey State Income Tax (NJIT): New Jersey has its own progressive income tax system. The amount withheld depends on your gross pay, NJ filing status, and the number of allowances you claim on your NJ W-4 form.
- New Jersey Unemployment Insurance (NJ UI): This is an employee contribution that helps fund unemployment benefits for eligible workers. The rate and wage base can change annually. For 2024, the employee rate is 0.0425% up to a wage base of $42,300.
- New Jersey Temporary Disability Insurance (NJ TDI): This provides temporary benefits to workers who are unable to work due to a non-work-related illness or injury. For 2024, the employee contribution rate is 0.00% up to a wage base of $42,300.
- New Jersey Family Leave Insurance (NJ FLI): This provides benefits for workers who need to take time off to care for a family member or bond with a new child. For 2024, the employee contribution rate is 0.00% up to a wage base of $42,300.
- Pre-tax Deductions: These are amounts taken out of your gross pay before taxes are calculated, reducing your taxable income. Common examples include contributions to a 401(k) or health insurance premiums.
- Post-tax Deductions: These are amounts taken out after taxes have been calculated. Examples include Roth 401(k) contributions, union dues, or wage garnishments.
How This Calculator Works:
Our NJ Payroll Calculator takes your gross pay and pay frequency, then applies the relevant federal and New Jersey tax laws and rates (approximated for the current year). It considers your filing statuses, dependents, and any additional withholding or deductions you specify to provide an estimated net pay per period.
Important Disclaimer:
This calculator provides an estimate for informational purposes only. Actual payroll deductions may vary based on specific circumstances, changes in tax laws, and other factors not accounted for in this simplified tool. Consult with a qualified tax professional or your payroll department for precise figures.
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function calculatePayroll() {
// Get input values
var grossPay = parseFloat(document.getElementById("grossPay").value);
var payFrequency = parseInt(document.getElementById("payFrequency").value);
var federalFilingStatus = document.getElementById("federalFilingStatus").value;
var federalDependents = parseInt(document.getElementById("federalDependents").value);
var additionalFederalWithholding = parseFloat(document.getElementById("additionalFederalWithholding").value);
var njFilingStatus = document.getElementById("njFilingStatus").value;
var njAllowances = parseInt(document.getElementById("njAllowances").value);
var additionalNjWithholding = parseFloat(document.getElementById("additionalNjWithholding").value);
var preTaxDeductions = parseFloat(document.getElementById("preTaxDeductions").value);
var postTaxDeductions = parseFloat(document.getElementById("postTaxDeductions").value);
// Validate inputs
if (isNaN(grossPay) || grossPay < 0 ||
isNaN(federalDependents) || federalDependents < 0 ||
isNaN(additionalFederalWithholding) || additionalFederalWithholding < 0 ||
isNaN(njAllowances) || njAllowances < 0 ||
isNaN(additionalNjWithholding) || additionalNjWithholding < 0 ||
isNaN(preTaxDeductions) || preTaxDeductions < 0 ||
isNaN(postTaxDeductions) || postTaxDeductions 609350) { federalTax += (federalTaxableIncome – 609350) * 0.37; federalTaxableIncome = 609350; }
if (federalTaxableIncome > 243725) { federalTax += (federalTaxableIncome – 243725) * 0.35; federalTaxableIncome = 243725; }
if (federalTaxableIncome > 191950) { federalTax += (federalTaxableIncome – 191950) * 0.32; federalTaxableIncome = 191950; }
if (federalTaxableIncome > 100525) { federalTax += (federalTaxableIncome – 100525) * 0.24; federalTaxableIncome = 100525; }
if (federalTaxableIncome > 47150) { federalTax += (federalTaxableIncome – 47150) * 0.22; federalTaxableIncome = 47150; }
if (federalTaxableIncome > 11600) { federalTax += (federalTaxableIncome – 11600) * 0.12; federalTaxableIncome = 11600; }
if (federalTaxableIncome > 0) { federalTax += federalTaxableIncome * 0.10; }
} else if (federalFilingStatus === "marriedJointly") {
if (federalTaxableIncome > 731200) { federalTax += (federalTaxableIncome – 731200) * 0.37; federalTaxableIncome = 731200; }
if (federalTaxableIncome > 487450) { federalTax += (federalTaxableIncome – 487450) * 0.35; federalTaxableIncome = 487450; }
if (federalTaxableIncome > 383900) { federalTax += (federalTaxableIncome – 383900) * 0.32; federalTaxableIncome = 383900; }
if (federalTaxableIncome > 201050) { federalTax += (federalTaxableIncome – 201050) * 0.24; federalTaxableIncome = 201050; }
if (federalTaxableIncome > 94300) { federalTax += (federalTaxableIncome – 94300) * 0.22; federalTaxableIncome = 94300; }
if (federalTaxableIncome > 23200) { federalTax += (federalTaxableIncome – 23200) * 0.12; federalTaxableIncome = 23200; }
if (federalTaxableIncome > 0) { federalTax += federalTaxableIncome * 0.10; }
} else if (federalFilingStatus === "headOfHousehold") {
if (federalTaxableIncome > 609350) { federalTax += (federalTaxableIncome – 609350) * 0.37; federalTaxableIncome = 609350; }
if (federalTaxableIncome > 243725) { federalTax += (federalTaxableIncome – 243725) * 0.35; federalTaxableIncome = 243725; }
if (federalTaxableIncome > 191950) { federalTax += (federalTaxableIncome – 191950) * 0.32; federalTaxableIncome = 191950; }
if (federalTaxableIncome > 100525) { federalTax += (federalTaxableIncome – 100525) * 0.24; federalTaxableIncome = 100525; }
if (federalTaxableIncome > 47150) { federalTax += (federalTaxableIncome – 47150) * 0.22; federalTaxableIncome = 47150; }
if (federalTaxableIncome > 11600) { federalTax += (federalTaxableIncome – 11600) * 0.12; federalTaxableIncome = 11600; }
if (federalTaxableIncome > 0) { federalTax += federalTaxableIncome * 0.10; }
}
var federalIncomeTax = Math.max(0, federalTax / payFrequency) + additionalFederalWithholding;
// Social Security Tax (2024)
var ssWageBase = 168600;
var ssRate = 0.062;
var annualSSTaxable = Math.min(annualGrossPay, ssWageBase);
var socialSecurityTax = (annualSSTaxable * ssRate) / payFrequency;
// Medicare Tax (2024)
var medicareRate = 0.0145;
var medicareTax = (annualGrossPay * medicareRate) / payFrequency;
// Additional Medicare Tax (simplified, not fully implemented for thresholds here)
// var additionalMedicareThresholdSingle = 200000;
// var additionalMedicareThresholdMarried = 250000;
// var additionalMedicareRate = 0.009;
// if (annualGrossPay > additionalMedicareThresholdSingle && (federalFilingStatus === "single" || federalFilingStatus === "headOfHousehold")) {
// medicareTax += ((annualGrossPay – additionalMedicareThresholdSingle) * additionalMedicareRate) / payFrequency;
// } else if (annualGrossPay > additionalMedicareThresholdMarried && federalFilingStatus === "marriedJointly") {
// medicareTax += ((annualGrossPay – additionalMedicareThresholdMarried) * additionalMedicareRate) / payFrequency;
// }
// — New Jersey State Taxes —
var njTaxableIncome = annualTaxableGross;
// NJ Allowances (2024 approximation: $1,000 per allowance)
var njAllowanceValue = 1000;
njTaxableIncome = Math.max(0, njTaxableIncome – (njAllowances * njAllowanceValue));
// NJ Income Tax Brackets (2024 approximations, annual taxable income)
var njTax = 0;
if (njFilingStatus === "single" || njFilingStatus === "marriedSeparately") {
if (njTaxableIncome > 500000) { njTax += (njTaxableIncome – 500000) * 0.1075; njTaxableIncome = 500000; }
if (njTaxableIncome > 150000) { njTax += (njTaxableIncome – 150000) * 0.0897; njTaxableIncome = 150000; }
if (njTaxableIncome > 75000) { njTax += (njTaxableIncome – 75000) * 0.0637; njTaxableIncome = 75000; }
if (njTaxableIncome > 40000) { njTax += (njTaxableIncome – 40000) * 0.05525; njTaxableIncome = 40000; }
if (njTaxableIncome > 35000) { njTax += (njTaxableIncome – 35000) * 0.035; njTaxableIncome = 35000; }
if (njTaxableIncome > 20000) { njTax += (njTaxableIncome – 20000) * 0.0175; njTaxableIncome = 20000; }
if (njTaxableIncome > 0) { njTax += njTaxableIncome * 0.014; }
} else if (njFilingStatus === "marriedJointly" || njFilingStatus === "headOfHousehold") { // Also Qualifying Widow(er)
if (njTaxableIncome > 500000) { njTax += (njTaxableIncome – 500000) * 0.1075; njTaxableIncome = 500000; }
if (njTaxableIncome > 150000) { njTax += (njTaxableIncome – 150000) * 0.0897; njTaxableIncome = 150000; }
if (njTaxableIncome > 100000) { njTax += (njTaxableIncome – 100000) * 0.0637; njTaxableIncome = 100000; }
if (njTaxableIncome > 80000) { njTax += (njTaxableIncome – 80000) * 0.05525; njTaxableIncome = 80000; }
if (njTaxableIncome > 70000) { njTax += (njTaxableIncome – 70000) * 0.035; njTaxableIncome = 70000; }
if (njTaxableIncome > 50000) { njTax += (njTaxableIncome – 50000) * 0.0245; njTaxableIncome = 50000; }
if (njTaxableIncome > 20000) { njTax += (njTaxableIncome – 20000) * 0.0175; njTaxableIncome = 20000; }
if (njTaxableIncome > 0) { njTax += njTaxableIncome * 0.014; }
}
var njIncomeTax = Math.max(0, njTax / payFrequency) + additionalNjWithholding;
// NJ UI, TDI, FLI (2024 rates)
var njWageBase = 42300;
var njUITaxable = Math.min(annualGrossPay, njWageBase);
var njTDITaxable = Math.min(annualGrossPay, njWageBase);
var njFLITaxable = Math.min(annualGrossPay, njWageBase);
var njUIRate = 0.000425; // 0.0425%
var njTDIRate = 0.00; // 0.00%
var njFLIRate = 0.00; // 0.00%
var njUITax = (njUITaxable * njUIRate) / payFrequency;
var njTDITax = (njTDITaxable * njTDIRate) / payFrequency;
var njFLITax = (njFLITaxable * njFLIRate) / payFrequency;
// Total Deductions
var totalFederalTaxes = federalIncomeTax + socialSecurityTax + medicareTax;
var totalNjTaxes = njIncomeTax + njUITax + njTDITax + njFLITax;
var totalDeductions = preTaxDeductions + totalFederalTaxes + totalNjTaxes + postTaxDeductions;
// Net Pay
var netPay = grossPay – totalDeductions;
// Display Results
var resultDiv = document.getElementById("result");
resultDiv.innerHTML =
"
Estimated Paycheck Breakdown:
" +
"
Gross Pay: $" + grossPay.toFixed(2) + "" +
"
Pre-tax Deductions: $" + preTaxDeductions.toFixed(2) + "" +
"
Federal Income Tax: $" + federalIncomeTax.toFixed(2) + "" +
"
Social Security Tax: $" + socialSecurityTax.toFixed(2) + "" +
"
Medicare Tax: $" + medicareTax.toFixed(2) + "" +
"
NJ Income Tax: $" + njIncomeTax.toFixed(2) + "" +
"
NJ Unemployment Insurance (UI): $" + njUITax.toFixed(2) + "" +
"
NJ Temporary Disability Insurance (TDI): $" + njTDITax.toFixed(2) + "" +
"
NJ Family Leave Insurance (FLI): $" + njFLITax.toFixed(2) + "" +
"
Post-tax Deductions: $" + postTaxDeductions.toFixed(2) + "" +
"
Total Deductions: $" + totalDeductions.toFixed(2) + "" +
"
Net Pay: $" + netPay.toFixed(2) + "";
}
// Run calculation on page load with default values
window.onload = calculatePayroll;