function calculatePaycheck() {
var grossPayAnnual = parseFloat(document.getElementById('grossPay').value);
var payFrequency = parseInt(document.getElementById('payFrequency').value);
var filingStatus = document.getElementById('filingStatus').value;
var preTaxDeductionsAnnual = parseFloat(document.getElementById('preTaxDeductions').value);
var postTaxDeductionsAnnual = parseFloat(document.getElementById('postTaxDeductions').value);
var additionalFederalWithholdingPerPeriod = parseFloat(document.getElementById('additionalFederalWithholding').value);
var federalTaxCreditsAnnual = parseFloat(document.getElementById('federalTaxCredits').value);
// Validate inputs
if (isNaN(grossPayAnnual) || grossPayAnnual < 0) grossPayAnnual = 0;
if (isNaN(preTaxDeductionsAnnual) || preTaxDeductionsAnnual < 0) preTaxDeductionsAnnual = 0;
if (isNaN(postTaxDeductionsAnnual) || postTaxDeductionsAnnual < 0) postTaxDeductionsAnnual = 0;
if (isNaN(additionalFederalWithholdingPerPeriod) || additionalFederalWithholdingPerPeriod < 0) additionalFederalWithholdingPerPeriod = 0;
if (isNaN(federalTaxCreditsAnnual) || federalTaxCreditsAnnual < 0) federalTaxCreditsAnnual = 0;
// Calculate per-period amounts
var grossPayPerPeriod = grossPayAnnual / payFrequency;
var preTaxDeductionsPerPeriod = preTaxDeductionsAnnual / payFrequency;
var postTaxDeductionsPerPeriod = postTaxDeductionsAnnual / payFrequency;
var federalTaxCreditsPerPeriod = federalTaxCreditsAnnual / payFrequency;
// 1. Calculate Taxable Gross Pay
var taxableGrossAnnual = grossPayAnnual – preTaxDeductionsAnnual;
var taxableGrossPerPeriod = taxableGrossAnnual / payFrequency;
// 2. FICA Taxes (Social Security & Medicare) – 2023/2024 rates
var socialSecurityRate = 0.062;
var medicareRate = 0.0145;
var socialSecurityWageBase = 168600; // 2024 limit, using for example
var socialSecurityTaxAnnual = Math.min(grossPayAnnual, socialSecurityWageBase) * socialSecurityRate;
var medicareTaxAnnual = grossPayAnnual * medicareRate;
var socialSecurityTaxPerPeriod = socialSecurityTaxAnnual / payFrequency;
var medicareTaxPerPeriod = medicareTaxAnnual / payFrequency;
// 3. Federal Income Tax (FIT) – Simplified 2024 Brackets
var standardDeduction;
var taxBrackets;
if (filingStatus === 'single') {
standardDeduction = 14600;
taxBrackets = [
{ rate: 0.10, limit: 11600 },
{ rate: 0.12, limit: 47150 },
{ rate: 0.22, limit: 100525 },
{ rate: 0.24, limit: 191950 },
{ rate: 0.32, limit: 243725 },
{ rate: 0.35, limit: 609350 },
{ rate: 0.37, limit: Infinity }
];
} else if (filingStatus === 'married') {
standardDeduction = 29200;
taxBrackets = [
{ rate: 0.10, limit: 23200 },
{ rate: 0.12, limit: 94300 },
{ rate: 0.22, limit: 201050 },
{ rate: 0.24, limit: 383900 },
{ rate: 0.32, limit: 487450 },
{ rate: 0.35, limit: 731200 },
{ rate: 0.37, limit: Infinity }
];
} else { // Head of Household
standardDeduction = 21900;
taxBrackets = [
{ rate: 0.10, limit: 16550 },
{ rate: 0.12, limit: 63100 },
{ rate: 0.22, limit: 100500 },
{ rate: 0.24, limit: 191950 },
{ rate: 0.32, limit: 243700 },
{ rate: 0.35, limit: 609350 },
{ rate: 0.37, limit: Infinity }
];
}
var adjustedTaxableIncomeAnnual = taxableGrossAnnual – standardDeduction;
if (adjustedTaxableIncomeAnnual < 0) adjustedTaxableIncomeAnnual = 0;
var federalIncomeTaxAnnual = 0;
var previousLimit = 0;
for (var i = 0; i previousLimit) {
var taxableInBracket = Math.min(adjustedTaxableIncomeAnnual, bracket.limit) – previousLimit;
federalIncomeTaxAnnual += taxableInBracket * bracket.rate;
}
previousLimit = bracket.limit;
}
// Apply tax credits
federalIncomeTaxAnnual = federalIncomeTaxAnnual – federalTaxCreditsAnnual;
if (federalIncomeTaxAnnual < 0) federalIncomeTaxAnnual = 0; // FIT cannot be negative
var federalIncomeTaxPerPeriod = federalIncomeTaxAnnual / payFrequency;
// Add additional withholding
federalIncomeTaxPerPeriod += additionalFederalWithholdingPerPeriod;
// 4. Total Taxes
var totalTaxesPerPeriod = federalIncomeTaxPerPeriod + socialSecurityTaxPerPeriod + medicareTaxPerPeriod;
// 5. Net Pay
var netPayPerPeriod = grossPayPerPeriod – preTaxDeductionsPerPeriod – totalTaxesPerPeriod – postTaxDeductionsPerPeriod;
// Display results
document.getElementById('grossPayPerPeriod').innerText = '$' + grossPayPerPeriod.toFixed(2);
document.getElementById('totalPreTaxDeductions').innerText = '$' + preTaxDeductionsPerPeriod.toFixed(2);
document.getElementById('taxableGrossPay').innerText = '$' + taxableGrossPerPeriod.toFixed(2);
document.getElementById('federalIncomeTax').innerText = '$' + federalIncomeTaxPerPeriod.toFixed(2);
document.getElementById('socialSecurityTax').innerText = '$' + socialSecurityTaxPerPeriod.toFixed(2);
document.getElementById('medicareTax').innerText = '$' + medicareTaxPerPeriod.toFixed(2);
document.getElementById('totalTaxes').innerText = '$' + totalTaxesPerPeriod.toFixed(2);
document.getElementById('totalPostTaxDeductions').innerText = '$' + postTaxDeductionsPerPeriod.toFixed(2);
document.getElementById('netPayPerPeriod').innerText = '$' + netPayPerPeriod.toFixed(2);
}
// Run calculation on page load with default values
window.onload = calculatePaycheck;
Understanding Your Florida Paycheck
Florida is one of the few states that does not impose a state income tax on its residents. This is a significant advantage for Floridians, as it means a larger portion of their gross earnings remains in their pocket compared to those living in states with state income taxes. However, while you won't see a state income tax deduction, your paycheck will still be subject to federal taxes and other common deductions.
Key Components of Your Florida Paycheck:
1. Gross Pay
This is your total earnings before any taxes or deductions are taken out. It's the base amount from which all other calculations begin. Your gross pay can be hourly wages multiplied by hours worked, or your annual salary divided by your pay periods.
2. Pre-tax Deductions
These are amounts subtracted from your gross pay before federal income tax is calculated. Common pre-tax deductions include contributions to a 401(k) or 403(b) retirement plan, health insurance premiums, dental and vision insurance, and Flexible Spending Accounts (FSAs) or Health Savings Accounts (HSAs). Because these deductions reduce your taxable income, they can lower your overall federal tax liability.
3. Federal Income Tax (FIT)
This is the largest tax deduction for most Americans. The amount withheld depends on your gross pay, your filing status (Single, Married Filing Jointly, Head of Household), and any additional withholding or tax credits you've indicated on your W-4 form. The U.S. uses a progressive tax system, meaning different portions of your income are taxed at different rates (tax brackets).
4. FICA Taxes (Social Security & Medicare)
FICA stands for Federal Insurance Contributions Act. These are mandatory federal taxes that fund Social Security and Medicare programs. They are split between the employee and employer, with employees typically paying:
Social Security: 6.2% of your gross wages, up to an annual wage base limit (e.g., $168,600 for 2024).
Medicare: 1.45% of all your gross wages, with no wage base limit. An additional 0.9% Medicare tax applies to wages over certain thresholds ($200,000 for single filers, $250,000 for married filing jointly).
Unlike federal income tax, FICA taxes are generally a flat percentage up to their respective limits and are not affected by your W-4 elections.
5. Post-tax Deductions
These deductions are taken out of your pay after all applicable taxes have been calculated and withheld. Examples include Roth 401(k) contributions, union dues, garnishments, and certain charitable contributions. While they don't reduce your taxable income, they still impact your final net pay.
6. Net Pay
This is the "take-home pay" – the amount you actually receive after all taxes and deductions have been subtracted from your gross pay. It's your gross pay minus pre-tax deductions, federal income tax, FICA taxes, and post-tax deductions.
How the Florida Paycheck Calculator Works:
Our calculator simplifies the complex process of estimating your take-home pay. By inputting your annual gross pay, pay frequency, federal filing status, and any pre-tax or post-tax deductions, it performs the following steps:
Determines your gross pay per pay period.
Subtracts pre-tax deductions to find your taxable gross income.
Calculates your federal income tax based on current IRS tax brackets and your filing status, factoring in the standard deduction and any specified tax credits or additional withholding.
Computes your Social Security and Medicare taxes (FICA).
Subtracts post-tax deductions.
Provides your estimated net pay per period.
Remember, this calculator provides an estimate. Actual withholdings may vary slightly due to specific payroll system calculations, mid-year changes in income, or other unique circumstances. It's always a good idea to review your pay stubs regularly.