Weekly
Bi-Weekly (Every 2 weeks)
Semi-Monthly (Twice a month)
Monthly
Single
Married Filing Jointly
Head of Household
Results Summary
Gross Pay:
Federal Income Tax (Est):
Social Security (6.2%):
Medicare (1.45%):
CA State Income Tax (Est):
CA SDI (1.1%):
Net Take-Home Pay:
function calculatePaycheck() {
var gross = parseFloat(document.getElementById('grossPay').value);
var freq = parseFloat(document.getElementById('payFrequency').value);
var status = document.getElementById('filingStatus').value;
var allow = parseInt(document.getElementById('allowances').value);
if (isNaN(gross) || gross 100000) fedTaxRate = 0.22;
if (annualGross > 190000) fedTaxRate = 0.24;
if (status === 'married') fedTaxRate -= 0.04;
var annualFedTax = annualGross * fedTaxRate;
var payFedTax = annualFedTax / freq;
// FICA
var paySocial = gross * 0.062;
var payMedicare = gross * 0.0145;
// California State Tax (Simplified Brackets + SDI)
// 2024 SDI Rate is 1.1%
var paySDI = gross * 0.011;
// Simplified CA PIT (Personal Income Tax)
var caTaxRate = 0.06;
if (annualGross 150000) caTaxRate = 0.093;
// Allowance credit (roughly $150 per allowance annually in tax reduction)
var allowanceCredit = (allow * 150) / freq;
var payStateTax = (annualGross * caTaxRate / freq) – allowanceCredit;
if (payStateTax < 0) payStateTax = 0;
var totalDeductions = payFedTax + paySocial + payMedicare + paySDI + payStateTax;
var netPay = gross – totalDeductions;
document.getElementById('resGross').innerText = "$" + gross.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resFedTax').innerText = "-$" + payFedTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resSocial').innerText = "-$" + paySocial.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resMedicare').innerText = "-$" + payMedicare.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resStateTax').innerText = "-$" + payStateTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resSDI').innerText = "-$" + paySDI.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resNet').innerText = "$" + netPay.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('results').style.display = 'block';
}
Understanding Your California Paycheck
Calculating a paycheck in California is more complex than in many other states due to specific state mandates like State Disability Insurance (SDI) and progressive personal income tax brackets. This ADP California paycheck calculator helps employees and employers estimate take-home pay by accounting for federal and state obligations.
Key Deductions in California
Federal Income Tax: Determined by your W-4 form settings and your annual earnings.
FICA (Social Security & Medicare): Combined 7.65% of your gross pay (6.2% for Social Security up to the wage base and 1.45% for Medicare).
California State Disability Insurance (SDI): For 2024, the SDI rate is 1.1%. Unlike federal taxes, there is no longer a taxable wage limit for SDI as of January 1, 2024.
California PIT (Personal Income Tax): California has one of the most progressive tax systems in the US, with rates ranging from 1% to 13.3% (including the Mental Health Services Act tax on high earners).
Example Calculation
If you are a Single filer in California earning a gross monthly salary of $5,000 with 1 allowance:
Gross Pay: $5,000.00
FICA Deductions: ~$382.50
CA SDI (1.1%): $55.00
Estimated State & Federal Taxes: ~$900 – $1,100 (depending on specific credits)
Estimated Monthly Net Pay: ~$3,500.00
Frequently Asked Questions
Why is my California tax higher than other states?
California provides extensive state-funded programs and has a high top-tier income tax bracket. Additionally, the mandatory SDI contribution is a unique feature of CA payroll that funds short-term disability and Paid Family Leave (PFL) benefits.
Does this calculator include the 0.9% Additional Medicare Tax?
The standard 1.45% is calculated here. If your annual compensation exceeds $200,000, your employer is required to withhold an additional 0.9% on the amount exceeding that threshold.
Disclaimer: This calculator is for estimation purposes only. Actual tax withholdings may vary based on your specific DE-4 and W-4 filings, pre-tax deductions like 401(k) or health insurance, and local tax changes.