.adp-calculator-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 8px;
background-color: #ffffff;
color: #333;
line-height: 1.6;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.adp-calculator-container h2 {
color: #d0271d;
margin-top: 0;
border-bottom: 2px solid #f4f4f4;
padding-bottom: 10px;
}
.adp-input-group {
margin-bottom: 15px;
}
.adp-input-group label {
display: block;
font-weight: 600;
margin-bottom: 5px;
font-size: 14px;
}
.adp-input-group input, .adp-input-group select {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
font-size: 16px;
}
.adp-calc-btn {
background-color: #d0271d;
color: white;
padding: 12px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
width: 100%;
font-size: 18px;
font-weight: bold;
transition: background-color 0.3s;
}
.adp-calc-btn:hover {
background-color: #a01d16;
}
.adp-results {
margin-top: 25px;
padding: 20px;
background-color: #f9f9f9;
border-radius: 4px;
display: none;
}
.adp-results h3 {
margin-top: 0;
color: #333;
}
.adp-result-row {
display: flex;
justify-content: space-between;
padding: 8px 0;
border-bottom: 1px solid #eee;
}
.adp-result-row.total {
border-bottom: none;
font-weight: bold;
font-size: 1.2em;
color: #d0271d;
}
.adp-article {
margin-top: 40px;
}
.adp-article h3 {
color: #d0271d;
}
.adp-article p {
margin-bottom: 15px;
}
.adp-article ul {
margin-bottom: 15px;
padding-left: 20px;
}
ADP Payroll & Take-Home Pay Estimator
Gross Pay Amount ($)
Pay Frequency
Weekly
Bi-weekly (Every 2 weeks)
Semi-monthly (Twice a month)
Monthly
Annually
Federal Filing Status
Single
Married / Filing Jointly
Head of Household
Pre-tax Deductions ($) (e.g. 401k, Health Ins.)
Estimated State Tax Rate (%)
Calculate Net Pay
Paycheck Summary
Gross Pay:
$0.00
Pre-tax Deductions:
-$0.00
Social Security (6.2%):
-$0.00
Medicare (1.45%):
-$0.00
Federal Income Tax (Est.):
-$0.00
State Income Tax:
-$0.00
Estimated Net Take-Home Pay:
$0.00
Understanding Your ADP Payroll Calculation
Calculating your take-home pay involves more than just subtracting a flat tax rate from your gross salary. The ADP payroll process follows a specific sequence of deductions and withholdings mandated by federal and state laws.
1. Gross Pay vs. Taxable Income
Your gross pay is the total amount earned before any deductions. However, taxes are not usually calculated on the full amount if you have pre-tax deductions like a 401(k) or medical insurance premiums. Subtracting these from your gross pay gives you your taxable income.
2. FICA Taxes (Social Security & Medicare)
The Federal Insurance Contributions Act (FICA) requires two specific withholdings from almost every American paycheck:
Social Security: Currently 6.2% of your gross pay (up to an annual wage base limit).Medicare: 1.45% of your gross pay.
3. Federal Income Tax Withholding
This is a progressive tax. Depending on your filing status (Single, Married, etc.), the IRS uses different brackets. Our calculator uses a simplified annual projection to estimate what will be withheld from your specific check based on current IRS guidelines.
4. State and Local Taxes
Depending on where you live, your state may take an additional percentage of your income. Some states like Florida or Texas have 0% state income tax, while others like California or New York have progressive rates similar to the federal government.
Example Calculation
If you earn a gross monthly salary of $5,000 and contribute $200 to a pre-tax 401(k):
Taxable Income: $4,800FICA (7.65%): $367.20Federal Tax (Est): ~$520.00State Tax (5%): $240.00Net Pay: ~$3,672.80
function calculatePayroll() {
var gross = parseFloat(document.getElementById('grossPay').value);
var freq = parseFloat(document.getElementById('payFrequency').value);
var status = document.getElementById('filingStatus').value;
var preTax = parseFloat(document.getElementById('preTaxDeductions').value);
var stateRate = parseFloat(document.getElementById('stateTaxRate').value);
if (isNaN(gross) || gross <= 0) {
alert("Please enter a valid gross pay amount.");
return;
}
// Taxable Income for the period
var taxableIncome = gross – preTax;
if (taxableIncome 609350) federalTaxAnnual = (annualTaxable – 609350) * 0.37 + 174238;
else if (annualTaxable > 243725) federalTaxAnnual = (annualTaxable – 243725) * 0.35 + 46294;
else if (annualTaxable > 191950) federalTaxAnnual = (annualTaxable – 191950) * 0.32 + 33817;
else if (annualTaxable > 100525) federalTaxAnnual = (annualTaxable – 100525) * 0.24 + 16290;
else if (annualTaxable > 47150) federalTaxAnnual = (annualTaxable – 47150) * 0.22 + 5147;
else if (annualTaxable > 11600) federalTaxAnnual = (annualTaxable – 11600) * 0.12 + 1160;
else federalTaxAnnual = annualTaxable * 0.10;
} else {
// Married Jointly
if (annualTaxable > 731200) federalTaxAnnual = (annualTaxable – 731200) * 0.37 + 177597;
else if (annualTaxable > 487450) federalTaxAnnual = (annualTaxable – 487450) * 0.35 + 97330;
else if (annualTaxable > 383900) federalTaxAnnual = (annualTaxable – 383900) * 0.32 + 72387;
else if (annualTaxable > 201050) federalTaxAnnual = (annualTaxable – 201050) * 0.24 + 32280;
else if (annualTaxable > 94300) federalTaxAnnual = (annualTaxable – 94300) * 0.22 + 10294;
else if (annualTaxable > 23200) federalTaxAnnual = (annualTaxable – 23200) * 0.12 + 2320;
else federalTaxAnnual = annualTaxable * 0.10;
}
var federalTaxPeriod = federalTaxAnnual / freq;
var stateTaxPeriod = taxableIncome * (stateRate / 100);
var totalDeductions = ssTax + medTax + federalTaxPeriod + stateTaxPeriod;
var netPay = taxableIncome – totalDeductions;
// Display
document.getElementById('resGross').innerText = '$' + gross.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resPreTax').innerText = '-$' + preTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resSS').innerText = '-$' + ssTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resMedicare').innerText = '-$' + medTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resFedTax').innerText = '-$' + federalTaxPeriod.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resStateTax').innerText = '-$' + stateTaxPeriod.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resNet').innerText = '$' + netPay.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('payrollResults').style.display = 'block';
}