Biweekly Payroll Calculator

Biweekly Payroll Calculator

Use this calculator to estimate your net pay for a biweekly pay period. Enter your gross pay and various deductions to see how much you'll take home after taxes and other contributions.

Your Biweekly Pay Estimate:

Enter your details and click "Calculate Net Pay" to see your estimate.

function calculateBiweeklyPayroll() { var grossPay = parseFloat(document.getElementById("grossPay").value); var federalTaxRate = parseFloat(document.getElementById("federalTaxRate").value); var stateTaxRate = parseFloat(document.getElementById("stateTaxRate").value); var healthPremium = parseFloat(document.getElementById("healthPremium").value); var retirementContributionRate = parseFloat(document.getElementById("retirementContributionRate").value); var otherDeductions = parseFloat(document.getElementById("otherDeductions").value); // Validate inputs if (isNaN(grossPay) || isNaN(federalTaxRate) || isNaN(stateTaxRate) || isNaN(healthPremium) || isNaN(retirementContributionRate) || isNaN(otherDeductions) || grossPay < 0 || federalTaxRate < 0 || stateTaxRate < 0 || healthPremium < 0 || retirementContributionRate < 0 || otherDeductions < 0) { document.getElementById("result").innerHTML = "Please enter valid positive numbers for all fields."; return; } // Fixed FICA rates (employee share) var socialSecurityRate = 0.062; // 6.2% var medicareRate = 0.0145; // 1.45% // 1. Calculate Pre-Tax Deductions var retirementContributionAmount = grossPay * (retirementContributionRate / 100); // Assuming health premium is pre-tax for this calculator var totalPreTaxDeductions = retirementContributionAmount + healthPremium; // 2. Calculate Taxable Gross Pay var taxableGrossPay = grossPay – totalPreTaxDeductions; if (taxableGrossPay < 0) taxableGrossPay = 0; // Ensure taxable gross doesn't go negative // 3. Calculate Taxes var federalTax = taxableGrossPay * (federalTaxRate / 100); var stateTax = taxableGrossPay * (stateTaxRate / 100); var socialSecurityTax = taxableGrossPay * socialSecurityRate; var medicareTax = taxableGrossPay * medicareRate; // 4. Total Taxes var totalTaxes = federalTax + stateTax + socialSecurityTax + medicareTax; // 5. Total Deductions (Pre-tax + Taxes + Post-tax) var totalDeductions = totalPreTaxDeductions + totalTaxes + otherDeductions; // 6. Calculate Net Pay var netPay = grossPay – totalDeductions; // Format results to two decimal places grossPay = grossPay.toFixed(2); retirementContributionAmount = retirementContributionAmount.toFixed(2); totalPreTaxDeductions = totalPreTaxDeductions.toFixed(2); taxableGrossPay = taxableGrossPay.toFixed(2); federalTax = federalTax.toFixed(2); stateTax = stateTax.toFixed(2); socialSecurityTax = socialSecurityTax.toFixed(2); medicareTax = medicareTax.toFixed(2); totalTaxes = totalTaxes.toFixed(2); otherDeductions = otherDeductions.toFixed(2); totalDeductions = totalDeductions.toFixed(2); netPay = netPay.toFixed(2); // Display results var resultHTML = ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += ""; resultHTML += "
Gross Pay:$" + grossPay + "
Pre-Tax Deductions:
  Retirement Contribution:$" + retirementContributionAmount + "
  Health Insurance Premium:$" + healthPremium + "
Total Pre-Tax Deductions:$" + totalPreTaxDeductions + "
Taxable Gross Pay:$" + taxableGrossPay + "
Taxes Withheld:
  Federal Income Tax:$" + federalTax + "
  State Income Tax:$" + stateTax + "
  Social Security Tax:$" + socialSecurityTax + "
  Medicare Tax:$" + medicareTax + "
Total Taxes:$" + totalTaxes + "
Post-Tax Deductions:
  Other Deductions:$" + otherDeductions + "
Total Deductions:$" + totalDeductions + "
Estimated Net Pay:$" + netPay + "
"; document.getElementById("result").innerHTML = resultHTML; } .payroll-calculator-container { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f9f9f9; padding: 25px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); max-width: 600px; margin: 20px auto; border: 1px solid #e0e0e0; } .payroll-calculator-container h2 { color: #2c3e50; text-align: center; margin-bottom: 20px; font-size: 1.8em; } .payroll-calculator-container p { color: #555; line-height: 1.6; margin-bottom: 15px; text-align: justify; } .calculator-form label { display: block; margin-bottom: 8px; color: #34495e; font-weight: bold; font-size: 0.95em; } .calculator-form input[type="number"] { width: calc(100% – 22px); padding: 10px; margin-bottom: 15px; border: 1px solid #ccc; border-radius: 5px; font-size: 1em; box-sizing: border-box; } .calculator-form button { background-color: #28a745; color: white; padding: 12px 25px; border: none; border-radius: 5px; cursor: pointer; font-size: 1.1em; font-weight: bold; display: block; width: 100%; margin-top: 20px; transition: background-color 0.3s ease; } .calculator-form button:hover { background-color: #218838; } .calculator-results { margin-top: 30px; padding-top: 20px; border-top: 1px solid #eee; } .calculator-results h3 { color: #2c3e50; text-align: center; margin-bottom: 15px; font-size: 1.5em; } .calculator-results table { width: 100%; border-collapse: collapse; margin-top: 15px; } .calculator-results table td { padding: 10px 0; border-bottom: 1px dashed #eee; color: #333; font-size: 1em; } .calculator-results table tr:last-child td { border-bottom: none; } .calculator-results table td:first-child { font-weight: normal; padding-left: 10px; } .calculator-results table td:last-child { text-align: right; font-weight: bold; padding-right: 10px; } .calculator-results .net-pay-row td { font-size: 1.2em; color: #007bff; border-top: 2px solid #007bff; padding-top: 15px; margin-top: 10px; } .calculator-results .net-pay-row td:first-child { font-weight: bold; }

Understanding Biweekly Payroll

Biweekly payroll refers to a payment schedule where employees are paid every two weeks, resulting in 26 paychecks per year. This is one of the most common payroll frequencies in the United States, offering a consistent and predictable income stream for employees.

How Biweekly Payroll is Calculated

Calculating your biweekly net pay involves several steps, starting from your gross earnings and subtracting various deductions. Here's a breakdown of the typical components:

  1. Gross Pay: This is your total earnings for the two-week period before any deductions. It includes your regular wages, overtime, bonuses, and commissions.
  2. Pre-Tax Deductions: These are amounts subtracted from your gross pay before taxes are calculated. Common pre-tax deductions include contributions to 401(k) or other retirement plans, health insurance premiums, and Flexible Spending Accounts (FSAs). These deductions reduce your taxable income.
  3. Taxable Gross Pay: This is your gross pay minus any pre-tax deductions. Your income taxes (federal and state) and FICA taxes (Social Security and Medicare) are calculated based on this amount.
  4. Federal Income Tax: The amount withheld for federal income tax depends on your W-4 form, which specifies your filing status and any additional withholding.
  5. State Income Tax: Similar to federal tax, state income tax withholding varies by state and your W-4 elections (or state equivalent). Some states do not have state income tax.
  6. FICA Taxes (Social Security and Medicare): These are mandatory federal taxes. As of current rates, employees typically pay 6.2% for Social Security (up to an annual wage base limit) and 1.45% for Medicare, applied to your taxable gross pay.
  7. Post-Tax Deductions: These are deductions taken from your pay after all taxes have been calculated and withheld. Examples include union dues, garnishments, Roth 401(k) contributions, and certain charitable contributions.
  8. Net Pay: This is your "take-home pay" – the amount you receive after all pre-tax deductions, taxes, and post-tax deductions have been subtracted from your gross pay.

Why Use a Biweekly Payroll Calculator?

Understanding your biweekly pay stub can be complex due to the various deductions. A calculator like this helps you:

  • Estimate Take-Home Pay: Get a clear picture of your net earnings.
  • Plan Your Budget: Accurately budget your expenses based on your actual take-home income.
  • Understand Deductions: See how different deductions (taxes, benefits, retirement) impact your final pay.
  • Verify Pay Stubs: Compare the calculator's estimate with your actual pay stub to ensure accuracy.
  • Evaluate Changes: Model the impact of changes to your gross pay, tax withholdings, or benefit contributions.

Disclaimer: This calculator provides an estimate based on the information you provide and general tax rates. Actual payroll calculations can vary due to specific state and local tax laws, individual W-4 elections, annual wage base limits for Social Security, and other unique deductions or benefits. Always refer to your official pay stub for exact figures.

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