Weekly
Bi-weekly (Every two weeks)
Semi-monthly (Twice a month)
Monthly
Yes
No
Single, 0 Allowances
Single, 1 Allowance
Single, 2 Allowances
Single, 3 Allowances
Married, 0 Allowances
Married, 1 Allowance
Married, 2 Allowances
Married, 3 Allowances
Head of Household, 1 Allowance
Head of Household, 2 Allowances
Estimated Net Pay:
$0.00
Understanding Alabama Paycheck Taxes
This calculator provides an estimate of your net pay after federal and state income taxes, as well as FICA taxes (Social Security and Medicare), based on the information you provide. It's important to note that this is a simplified model and actual take-home pay may vary due to additional deductions like health insurance premiums, retirement contributions (401k, 403b), union dues, or other voluntary or mandatory withholdings.
Federal Income Tax Withholding
Federal income tax is calculated based on your W-4 information (marital status and allowances) and your gross pay. The IRS provides withholding tables that determine the amount to be withheld. Higher allowances generally result in lower withholding. This calculator uses simplified W-4 estimations for demonstration purposes.
FICA Taxes (Social Security & Medicare)
These are federal payroll taxes that fund Social Security and Medicare. They are typically calculated as a percentage of your gross earnings, with specific limits for Social Security.
Social Security Tax: Currently 6.2% on earnings up to an annual wage base limit (which changes each year). For simplicity in this calculator, we assume the limit is not reached within a single pay period.
Medicare Tax: Currently 1.45% on all earnings, with no wage limit. Additional Medicare Tax applies to higher earners, but is not included in this basic calculator.
Alabama State Income Tax
Alabama has a state income tax system. The tax rates are progressive, meaning higher incomes are taxed at higher rates. The calculation also depends on your filing status and the number of dependents claimed. Alabama uses a tax credit system based on filing status and dependents, which effectively reduces the tax liability.
Important Note: This calculator assumes you are subject to Alabama state income tax withholding if you select 'Yes'. If you are not an Alabama resident but work in Alabama, or vice versa, tax implications can be complex and may involve reciprocity agreements with other states. Consult a tax professional for specific advice.
How the Calculation Works (Simplified)
The calculator performs the following steps:
Calculate Federal Income Tax: Based on your selected W-4 status and gross pay, an estimated federal tax is determined.
Calculate FICA Taxes: Social Security and Medicare taxes are calculated as percentages of your gross pay.
Calculate Alabama State Income Tax: If selected, this tax is calculated based on the gross pay and specific Alabama tax rules (using a simplified credit-based system for this calculator).
Calculate Net Pay: Gross Pay minus Federal Tax, FICA Taxes, and Alabama State Tax.
Disclaimer: This calculator is for informational purposes only and should not be considered professional tax advice. Tax laws and regulations are subject to change. For accurate tax planning, please consult with a qualified tax professional.
function calculateTaxes() {
var grossPay = parseFloat(document.getElementById("grossPay").value);
var payFrequency = document.getElementById("payFrequency").value;
var alabamaWithholding = document.getElementById("alabamaWithholding").value;
var federalWithholding = document.getElementById("federalWithholding").value;
var socialSecurityPercent = parseFloat(document.getElementById("socialSecurityPercent").value);
var medicarePercent = parseFloat(document.getElementById("medicarePercent").value);
var federalTax = 0;
var alabamaTax = 0;
var socialSecurityTax = 0;
var medicareTax = 0;
var totalTaxes = 0;
var netPay = 0;
// — Input Validation —
if (isNaN(grossPay) || grossPay < 0) {
document.getElementById("result-amount").innerText = "$0.00";
document.getElementById("tax-details").innerHTML = "";
return;
}
if (isNaN(socialSecurityPercent) || socialSecurityPercent < 0) socialSecurityPercent = 6.2;
if (isNaN(medicarePercent) || medicarePercent < 0) medicarePercent = 1.45;
// — Federal Income Tax Calculation (Simplified W-4 Approximation) —
var annualGrossPay = grossPay;
if (payFrequency === "weekly") annualGrossPay *= 52;
else if (payFrequency === "biweekly") annualGrossPay *= 26;
else if (payFrequency === "semimonthly") annualGrossPay *= 24;
else if (payFrequency === "monthly") annualGrossPay *= 12;
var maritalStatus = "single";
var allowances = 0;
if (federalWithholding.startsWith("single")) {
maritalStatus = "single";
allowances = parseInt(federalWithholding.split("_")[1]);
} else if (federalWithholding.startsWith("married")) {
maritalStatus = "married";
allowances = parseInt(federalWithholding.split("_")[1]);
} else if (federalWithholding.startsWith("head_of_household")) {
maritalStatus = "head_of_household";
allowances = parseInt(federalWithholding.split("_")[1]);
}
// Simplified withholding based on IRS Publication 15-T (using estimated percentages/brackets)
// These are rough estimates and a real calculator would use precise tables.
var taxableIncome = annualGrossPay;
var taxRate = 0;
if (maritalStatus === "single") {
if (allowances === 0) {
if (taxableIncome <= 11000) taxRate = 0.10;
else if (taxableIncome <= 44725) taxRate = 0.12;
else if (taxableIncome <= 95375) taxRate = 0.22;
else if (taxableIncome <= 182100) taxRate = 0.24;
else if (taxableIncome <= 231250) taxRate = 0.32;
else if (taxableIncome <= 578125) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 1) {
if (taxableIncome <= 12700) taxRate = 0.10;
else if (taxableIncome <= 46475) taxRate = 0.12;
else if (taxableIncome <= 97125) taxRate = 0.22;
else if (taxableIncome <= 183850) taxRate = 0.24;
else if (taxableIncome <= 232975) taxRate = 0.32;
else if (taxableIncome <= 579900) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 2) {
if (taxableIncome <= 14400) taxRate = 0.10;
else if (taxableIncome <= 48225) taxRate = 0.12;
else if (taxableIncome <= 98875) taxRate = 0.22;
else if (taxableIncome <= 185600) taxRate = 0.24;
else if (taxableIncome <= 234725) taxRate = 0.32;
else if (taxableIncome <= 581650) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 3) {
if (taxableIncome <= 16100) taxRate = 0.10;
else if (taxableIncome <= 49975) taxRate = 0.12;
else if (taxableIncome <= 100625) taxRate = 0.22;
else if (taxableIncome <= 187350) taxRate = 0.24;
else if (taxableIncome <= 236475) taxRate = 0.32;
else if (taxableIncome <= 583400) taxRate = 0.35;
else taxRate = 0.37;
}
} else if (maritalStatus === "married") {
if (allowances === 0) {
if (taxableIncome <= 22000) taxRate = 0.10;
else if (taxableIncome <= 89450) taxRate = 0.12;
else if (taxableIncome <= 190750) taxRate = 0.22;
else if (taxableIncome <= 364200) taxRate = 0.24;
else if (taxableIncome <= 462500) taxRate = 0.32;
else if (taxableIncome <= 693750) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 1) {
if (taxableIncome <= 25400) taxRate = 0.10;
else if (taxableIncome <= 92950) taxRate = 0.12;
else if (taxableIncome <= 194250) taxRate = 0.22;
else if (taxableIncome <= 367700) taxRate = 0.24;
else if (taxableIncome <= 465900) taxRate = 0.32;
else if (taxableIncome <= 697200) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 2) {
if (taxableIncome <= 28800) taxRate = 0.10;
else if (taxableIncome <= 96450) taxRate = 0.12;
else if (taxableIncome <= 197750) taxRate = 0.22;
else if (taxableIncome <= 371200) taxRate = 0.24;
else if (taxableIncome <= 469400) taxRate = 0.32;
else if (taxableIncome <= 700700) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 3) {
if (taxableIncome <= 32200) taxRate = 0.10;
else if (taxableIncome <= 99950) taxRate = 0.12;
else if (taxableIncome <= 201250) taxRate = 0.22;
else if (taxableIncome <= 374700) taxRate = 0.24;
else if (taxableIncome <= 472900) taxRate = 0.32;
else if (taxableIncome <= 704200) taxRate = 0.35;
else taxRate = 0.37;
}
} else if (maritalStatus === "head_of_household") {
if (allowances === 1) {
if (taxableIncome <= 14050) taxRate = 0.10;
else if (taxableIncome <= 53550) taxRate = 0.12;
else if (taxableIncome <= 102975) taxRate = 0.22;
else if (taxableIncome <= 185550) taxRate = 0.24;
else if (taxableIncome <= 234675) taxRate = 0.32;
else if (taxableIncome <= 579550) taxRate = 0.35;
else taxRate = 0.37;
} else if (allowances === 2) {
if (taxableIncome <= 17450) taxRate = 0.10;
else if (taxableIncome <= 56950) taxRate = 0.12;
else if (taxableIncome <= 104725) taxRate = 0.22;
else if (taxableIncome <= 187300) taxRate = 0.24;
else if (taxableIncome <= 236425) taxRate = 0.32;
else if (taxableIncome <= 581150) taxRate = 0.35;
else taxRate = 0.37;
}
}
federalTax = (annualGrossPay * taxRate) / (payFrequency === "weekly" ? 52 : payFrequency === "biweekly" ? 26 : payFrequency === "semimonthly" ? 24 : 12);
// — FICA Taxes Calculation —
socialSecurityTax = grossPay * (socialSecurityPercent / 100);
medicareTax = grossPay * (medicarePercent / 100);
// — Alabama State Income Tax Calculation (Simplified – assuming ~5% effective rate after credits) —
// Alabama uses a tax credit system, which is complex to model accurately without more W-4 details.
// This simplified model applies a flat rate *after* a deduction for allowances (which is not how it actually works but approximates the impact).
// A more accurate approach would use tax brackets and specific credit amounts.
var alabamaTaxRate = 0.05; // Approximate effective rate
var alabamaDeduction = 0;
if(alabamaWithholding === "yes"){
if (maritalStatus === "single") alabamaDeduction = allowances * 150; // Simplified deduction for allowances
else if (maritalStatus === "married" || maritalStatus === "head_of_household") alabamaDeduction = allowances * 300; // Simplified deduction for allowances
else alabamaDeduction = allowances * 150; // Default
var taxableAlabamaIncome = annualGrossPay – alabamaDeduction; // Simplified taxable income
if (taxableAlabamaIncome < 0) taxableAlabamaIncome = 0;
// Simplified Alabama Tax Brackets/Credits (Illustrative)
var calculatedAlabamaTax = 0;
if (taxableAlabamaIncome <= 500) {
calculatedAlabamaTax = 0; // No tax on very low income
} else if (taxableAlabamaIncome <= 1000) {
calculatedAlabamaTax = (taxableAlabamaIncome – 500) * 0.02; // 2% on income over 500
} else if (taxableAlabamaIncome <= 1500) {
calculatedAlabamaTax = (500 * 0.02) + (taxableAlabamaIncome – 1000) * 0.04; // 2% on first 500, 4% on next 500
} else if (taxableAlabamaIncome <= 2000) {
calculatedAlabamaTax = (500 * 0.02) + (500 * 0.04) + (taxableAlabamaIncome – 1500) * 0.05; // 2%, 4%, 5%
} else {
calculatedAlabamaTax = (500 * 0.02) + (500 * 0.04) + (500 * 0.05) + (taxableAlabamaIncome – 2000) * 0.05; // Max rate 5%
}
// Apply tax credits (very simplified example)
var taxCredit = 0;
if (maritalStatus === "single") taxCredit = 100;
else if (maritalStatus === "married") taxCredit = 200;
else if (maritalStatus === "head_of_household") taxCredit = 150;
// Additional credit per dependent (example)
taxCredit += allowances * 20;
alabamaTax = calculatedAlabamaTax – taxCredit;
if (alabamaTax < 0) alabamaTax = 0; // Tax cannot be negative
// Annualize and then divide by pay periods for withholding
alabamaTax = (alabamaTax / (payFrequency === "weekly" ? 52 : payFrequency === "biweekly" ? 26 : payFrequency === "semimonthly" ? 24 : 12));
}
// — Total Taxes and Net Pay —
totalTaxes = federalTax + socialSecurityTax + medicareTax + alabamaTax;
netPay = grossPay – totalTaxes;
// — Display Results —
document.getElementById("result-amount").innerText = "$" + netPay.toFixed(2);
document.getElementById("tax-details").innerHTML =
"Gross Pay: $" + grossPay.toFixed(2) + "" +
"Federal Income Tax: $" + federalTax.toFixed(2) + "" +
"Social Security Tax: $" + socialSecurityTax.toFixed(2) + "" +
"Medicare Tax: $" + medicareTax.toFixed(2) + "" +
(alabamaWithholding === "yes" ? "Alabama State Tax: $" + alabamaTax.toFixed(2) + "" : "") +
"Total Estimated Taxes: $" + totalTaxes.toFixed(2);
}
// Initial calculation on load
document.addEventListener("DOMContentLoaded", function() {
calculateTaxes();
});