Use this calculator to estimate the gross pay, net pay, and total employer costs for a single employee per pay period, similar to how a payroll service like Gusto would process it. This tool provides an approximation of federal and state payroll taxes and common deductions.
Weekly
Bi-weekly
Semi-monthly
Monthly
Employee Federal Tax Information (W-4 Estimate)
Note: This calculator uses a simplified W-4 allowance system for federal income tax estimation, which may not perfectly reflect the current W-4 form.
Single
Married Filing Jointly
State & Other Deductions
Employer Tax Information
Federal Unemployment Tax (FUTA) is typically 0.6% on the first $7,000 of wages. This is automatically included.
Payroll Summary per Pay Period
Gross Pay:
Employee Deductions:
Federal Income Tax:
Social Security Tax:
Medicare Tax:
State Income Tax:
Health Insurance Premium:
401(k) Contribution:
Total Employee Deductions:
Net Pay (Take-Home Pay):
Employer Contributions:
Social Security Contribution:
Medicare Contribution:
FUTA Contribution:
SUI Contribution:
Total Employer Payroll Taxes:
Total Payroll Cost (Gross Pay + Employer Taxes):
Understanding Your Payroll with Gusto
Payroll can be one of the most complex aspects of running a business, involving not just paying employees but also calculating and remitting various federal, state, and local taxes, as well as managing deductions for benefits. Services like Gusto simplify this process by automating calculations and filings.
What Does a Payroll Calculator Estimate?
A payroll calculator, like this one, helps you understand the breakdown of an employee's gross pay into their net (take-home) pay after deductions, and also the additional costs an employer incurs in the form of payroll taxes. Key components include:
Gross Pay: The total amount an employee earns before any deductions.
Employee Deductions: These are amounts withheld from an employee's gross pay. They typically include:
Federal Income Tax (FIT): Based on the employee's W-4 form, filing status, and allowances.
Social Security Tax: A federal tax that funds retirement, disability, and survivor benefits. Employees and employers each pay 6.2% on wages up to an annual limit.
Medicare Tax: A federal tax that funds hospital insurance. Employees and employers each pay 1.45% on all wages.
State Income Tax (SIT): Varies by state; some states have no income tax, while others have progressive rates.
Other Deductions: Such as health insurance premiums, 401(k) contributions, and other pre-tax or post-tax benefits.
Net Pay: The amount an employee actually receives after all deductions are taken out. This is often referred to as "take-home pay."
Employer Payroll Taxes: These are additional costs paid by the employer on top of the employee's gross wages. They include:
Employer Social Security & Medicare: The employer's matching portion of these federal taxes.
Federal Unemployment Tax Act (FUTA): A federal tax that funds unemployment benefits. Employers pay a small percentage on the first few thousand dollars of an employee's wages.
State Unemployment Insurance (SUI): A state-level tax that also funds unemployment benefits. Rates and wage bases vary significantly by state and employer.
Total Payroll Cost: This is the true cost of an employee to the business, encompassing their gross pay plus all employer-paid payroll taxes.
How Gusto Simplifies Payroll
Gusto is a popular payroll platform designed to streamline these complex processes for businesses. It automates:
Gross-to-Net Calculations: Accurately calculates all employee deductions.
Tax Filings: Automatically calculates, files, and pays federal, state, and local payroll taxes.
Benefits Administration: Integrates with health insurance, 401(k), and other benefits, deducting contributions directly.
Compliance: Helps businesses stay compliant with ever-changing tax laws and regulations.
Reporting: Provides detailed reports for accounting and business analysis.
Important Considerations
This calculator provides an estimate. Actual payroll calculations can be more complex due to:
Specific State/Local Taxes: Many states have unique tax structures, and some cities or counties have their own local income taxes.
Pre-Tax vs. Post-Tax Deductions: The order and taxability of deductions (e.g., health savings accounts, flexible spending accounts) can impact taxable income.
Wage Bases: Annual limits for Social Security, FUTA, and SUI mean that taxes stop being collected once an employee's year-to-date earnings exceed these thresholds. This calculator estimates per-period, assuming wages are below annual limits for simplicity.
New Hire Reporting & Other Compliance: Beyond taxes, there are other compliance requirements for employers.
For precise payroll processing and compliance, using a dedicated payroll service like Gusto is highly recommended.
Example Calculation:
Let's use the default values to see how the calculator works:
Gross Pay per Pay Period: $2,000
Pay Frequency: Bi-weekly (26 pay periods/year)
Federal Filing Status: Single
Federal Allowances: 2
Estimated State Income Tax Rate: 5%
Employee Health Insurance Premium: $100
Employee 401(k) Contribution: $50
Employer SUI Rate: 3.5%
Employer SUI Annual Wage Base: $9,000
Click "Calculate Payroll" with these values to see the estimated net pay and total employer cost.
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function calculatePayroll() {
// Get input values
var grossPayPerPeriod = parseFloat(document.getElementById('grossPayPerPeriod').value);
var payFrequency = parseInt(document.getElementById('payFrequency').value); // Number of pay periods per year
var federalFilingStatus = document.getElementById('federalFilingStatus').value;
var federalAllowances = parseInt(document.getElementById('federalAllowances').value);
var stateIncomeTaxRate = parseFloat(document.getElementById('stateIncomeTaxRate').value) / 100;
var employeeHealthPremium = parseFloat(document.getElementById('employeeHealthPremium').value);
var employee401k = parseFloat(document.getElementById('employee401k').value);
var employerSUIrate = parseFloat(document.getElementById('employerSUIrate').value) / 100;
var employerSUIwageBase = parseFloat(document.getElementById('employerSUIwageBase').value);
// Validate inputs
if (isNaN(grossPayPerPeriod) || grossPayPerPeriod < 0 ||
isNaN(federalAllowances) || federalAllowances < 0 ||
isNaN(stateIncomeTaxRate) || stateIncomeTaxRate 1 ||
isNaN(employeeHealthPremium) || employeeHealthPremium < 0 ||
isNaN(employee401k) || employee401k < 0 ||
isNaN(employerSUIrate) || employerSUIrate 1 ||
isNaN(employerSUIwageBase) || employerSUIwageBase ssWageBase) { // If annual gross exceeds wage base, cap per-period SS
employeeSS = Math.min(grossPayPerPeriod, (ssWageBase – (annualGrossPay – grossPayPerPeriod)) / payFrequency) * ssRate;
if (employeeSS < 0) employeeSS = 0; // Ensure it doesn't go negative if already over limit
}
employeeSS = grossPayPerPeriod * ssRate; // Simpler: apply rate directly per period, assume not hitting limit for single period calc
// 2. Medicare Tax (Employee)
var employeeMedicare = grossPayPerPeriod * medicareRate;
// 3. Federal Income Tax (FIT) – Simplified estimation based on old W-4 concept
var standardDeduction = (federalFilingStatus === 'single') ? 14600 : 29200; // 2024 standard deductions
var allowanceValue = 4700; // Historical allowance value for calculation
var taxableIncomeAnnual = annualGrossPay – standardDeduction – (federalAllowances * allowanceValue);
if (taxableIncomeAnnual < 0) taxableIncomeAnnual = 0;
var annualFIT = 0;
// Simplified progressive tax rates (example, not actual 2024 brackets, for demonstration)
if (taxableIncomeAnnual <= 11600) {
annualFIT = taxableIncomeAnnual * 0.10;
} else if (taxableIncomeAnnual <= 47150) {
annualFIT = (11600 * 0.10) + ((taxableIncomeAnnual – 11600) * 0.12);
} else if (taxableIncomeAnnual <= 100525) {
annualFIT = (11600 * 0.10) + (35550 * 0.12) + ((taxableIncomeAnnual – 47150) * 0.22);
} else if (taxableIncomeAnnual <= 191950) {
annualFIT = (11600 * 0.10) + (35550 * 0.12) + (53375 * 0.22) + ((taxableIncomeAnnual – 100525) * 0.24);
} else { // Simplified top bracket
annualFIT = (11600 * 0.10) + (35550 * 0.12) + (53375 * 0.22) + (91425 * 0.24) + ((taxableIncomeAnnual – 191950) * 0.32);
}
var employeeFIT = annualFIT / payFrequency;
if (employeeFIT < 0) employeeFIT = 0; // Ensure FIT is not negative
// 4. State Income Tax (SIT)
var employeeSIT = grossPayPerPeriod * stateIncomeTaxRate;
// 5. Other Deductions
var totalOtherDeductions = employeeHealthPremium + employee401k;
// Total Employee Deductions
var totalEmployeeDeductions = employeeFIT + employeeSS + employeeMedicare + employeeSIT + totalOtherDeductions;
// Net Pay
var netPay = grossPayPerPeriod – totalEmployeeDeductions;
// — Employer Contributions —
// 1. Social Security Contribution (Employer)
var employerSS = grossPayPerPeriod * ssRate; // Simpler: apply rate directly per period
// 2. Medicare Contribution (Employer)
var employerMedicare = grossPayPerPeriod * medicareRate;
// 3. FUTA Contribution (Employer)
// For a single pay period, we apply the rate to the portion of gross pay that falls within the annual wage base.
// This is an approximation as actual FUTA stops once the annual limit is met.
var futaTaxableWagesPerPeriod = Math.min(grossPayPerPeriod, futaWageBase / payFrequency);
var employerFUTA = futaTaxableWagesPerPeriod * futaRate;
// 4. SUI Contribution (Employer)
// Similar to FUTA, apply rate to the portion of gross pay within the annual wage base.
var suiTaxableWagesPerPeriod = Math.min(grossPayPerPeriod, employerSUIwageBase / payFrequency);
var employerSUI = suiTaxableWagesPerPeriod * employerSUIrate;
// Total Employer Payroll Taxes
var totalEmployerTaxes = employerSS + employerMedicare + employerFUTA + employerSUI;
// Total Payroll Cost
var totalPayrollCost = grossPayPerPeriod + totalEmployerTaxes;
// Display Results
document.getElementById('grossPayOutput').innerText = '$' + grossPayPerPeriod.toFixed(2);
document.getElementById('employeeFIT').innerText = '$' + employeeFIT.toFixed(2);
document.getElementById('employeeSS').innerText = '$' + employeeSS.toFixed(2);
document.getElementById('employeeMedicare').innerText = '$' + employeeMedicare.toFixed(2);
document.getElementById('employeeSIT').innerText = '$' + employeeSIT.toFixed(2);
document.getElementById('employeeHealthPremiumOutput').innerText = '$' + employeeHealthPremium.toFixed(2);
document.getElementById('employee401kOutput').innerText = '$' + employee401k.toFixed(2);
document.getElementById('totalEmployeeDeductions').innerText = '$' + totalEmployeeDeductions.toFixed(2);
document.getElementById('netPay').innerText = '$' + netPay.toFixed(2);
document.getElementById('employerSS').innerText = '$' + employerSS.toFixed(2);
document.getElementById('employerMedicare').innerText = '$' + employerMedicare.toFixed(2);
document.getElementById('employerFUTA').innerText = '$' + employerFUTA.toFixed(2);
document.getElementById('employerSUI').innerText = '$' + employerSUI.toFixed(2);
document.getElementById('totalEmployerTaxes').innerText = '$' + totalEmployerTaxes.toFixed(2);
document.getElementById('totalPayrollCost').innerText = '$' + totalPayrollCost.toFixed(2);
}
// Run calculation on page load with default values
window.onload = calculatePayroll;