New Jersey Paycheck Calculator
Year-To-Date & Supplemental Options
Federal Withholding (W-4)
New Jersey Withholding (Form NJ-W4)
Local Taxes
Deductions
Estimated Paycheck
What Is the New Jersey Paycheck Calculator?
The New Jersey Paycheck Calculator is a payroll estimation tool that converts gross pay into estimated take-home pay. It calculates federal income tax, Social Security, Medicare, New Jersey income tax, NJ UI/WF/SWF, Temporary Disability Insurance, Family Leave Insurance, optional local tax, and paycheck deductions.
To estimate a New Jersey paycheck, enter your pay amount or hourly earnings, select your pay frequency, add your federal and NJ withholding information, and enter applicable deductions. The calculator subtracts estimated taxes and deductions from gross pay to produce your estimated net take-home pay for that pay period.
The tool is useful for New Jersey employees who want to estimate a regular paycheck, compare hourly and salary earnings, account for overtime, or see how a bonus or pre-tax deduction could affect the amount deposited after payroll withholding.
How the New Jersey Paycheck Calculator Works
The calculator first determines gross pay for the current pay period. In Salary / Gross Pay mode, it uses the entered Gross Pay amount. In Hourly mode, it adds regular wages, overtime at 1.5 times the hourly rate, and double-time wages at 2 times the rate.
Here, R is the hourly rate, Hr is regular hours, Ho is overtime hours, and Hd is double-time hours. Any bonus or supplemental pay is then added to regular gross pay.
The code creates two main taxable-pay amounts. Health or Section 125 deductions reduce the pay subject to FICA and the coded New Jersey payroll contributions. Traditional 401(k) or 403(b) contributions also reduce the income amount used for federal and New Jersey income-tax calculations.
Federal and New Jersey income tax are calculated by annualizing the current period’s subject income according to the selected pay frequency. The code then applies its filing-status or NJ-W4 tax table and converts the annual tax back to a per-period amount. Federal W-4 adjustments and NJ extra withholding are included when entered.
Finally, all calculated taxes and deductions are subtracted from gross pay.
Worked Example
Suppose you use the calculator’s default settings: $3,000 gross pay, biweekly frequency, Single or Married Filing Separately for federal withholding, NJ Rate Table A, one NJ allowance, no year-to-date wages, no bonus, and no deductions.
The code calculates approximately $322.58 of federal income tax, $186.00 of Social Security, $43.50 of Medicare, $118.08 of NJ income tax, $12.75 of NJ UI/WF/SWF, $5.70 of NJ TDI, and $6.90 of NJ FLI. Total estimated taxes are $695.50. Estimated take-home pay is therefore $2,304.50, with a displayed effective tax rate of 23.2%.
How to Use the New Jersey Paycheck Calculator: Step by Step
- Choose Salary / Gross Pay or Hourly. Salary mode accepts gross pay per period. Hourly mode asks for your hourly rate, regular hours, overtime hours, and double-time hours.
- Select your Pay Frequency. Available choices are weekly, biweekly, semimonthly, monthly, quarterly, and annually.
- Enter your YTD Gross Subject to FICA / NJ Taxes if applicable. The calculator uses this amount when checking Social Security and coded New Jersey payroll contribution wage bases, as well as the Additional Medicare threshold.
- If you have a bonus, enter the Bonus / Supplemental Pay and choose whether it should be combined with regular wages or handled with the calculator’s separate supplemental method.
- Complete the Federal Withholding (W-4) fields. Select filing status and enter any Step 2, Step 3, Step 4a, Step 4b, or Step 4c information that applies.
- Select your NJ-W4 Withholding Table, enter your NJ-W4 allowances, and add any extra New Jersey withholding.
- Enter a Local Tax Rate only when applicable. The field defaults to zero.
- Add any Traditional 401(k), Health / Sec. 125, and Post-Tax Deductions taken from this paycheck.
- Check the acknowledgement box and select Calculate Take-Home Pay.
The results separate gross pay, federal taxes, state payroll taxes, deductions, total taxes, total deductions, and net take-home pay. Additional Medicare, local tax, and post-tax deductions appear only when the entered values make those items applicable.
Factors That Can Affect Your New Jersey Paycheck Estimate
Pay Frequency and Current Earnings
The calculator annualizes the current paycheck when estimating federal and New Jersey income-tax withholding. A $3,000 biweekly paycheck, for example, is treated differently from a $3,000 monthly paycheck because the selected frequency changes the annualized income used by the tax-table calculations.
Year-to-Date Wages
The YTD gross field is important for taxes with annual wage limits or thresholds. In this code, YTD wages affect Social Security, Additional Medicare, NJ UI/WF/SWF, NJ TDI, and NJ FLI. They do not change the annualized federal or New Jersey income-tax bracket calculation.
| Payroll Item | Rule Used by the Calculator |
|---|---|
| Social Security | 6.2% with a $184,500 coded wage base |
| Medicare | 1.45% of subject wages |
| Additional Medicare | 0.9% on coded wages crossing the $200,000 YTD threshold |
| NJ UI/WF/SWF | 0.425% with a $44,800 coded wage base |
| NJ TDI | 0.19% with a $171,100 coded wage base |
| NJ FLI | 0.23% with a $171,100 coded wage base |
| Separate supplemental wages | 22% federal and 5.8% New Jersey on the bonus amount |
Pre-Tax and Post-Tax Deductions
The calculator treats deduction types differently. Health or Section 125 deductions reduce the amount used for income taxes, FICA, and the coded New Jersey UI, TDI, and FLI calculations. Traditional 401(k) contributions reduce the income used for federal and NJ income tax but remain subject to FICA and those NJ payroll contributions. Post-tax deductions reduce net pay without reducing taxable wages.
Important Limitations
This calculator provides an estimate, not payroll, accounting, legal, or tax advice. Its results depend on the 2026 rates, thresholds, brackets, and assumptions coded into the tool, plus the information you enter. Actual payroll withholding can differ because of employer payroll procedures, tax-law changes, individual circumstances, benefit treatment, or other adjustments that are not represented in the calculator.
Inputs are converted to nonnegative values by the calculation logic, and total gross pay must be greater than zero. However, the code does not prevent entered deductions from exceeding gross pay. Unusual combinations of deductions or withholding can therefore produce an unusually low or even negative estimated net paycheck.
Frequently Asked Questions
How do I calculate my New Jersey take-home pay?
Enter your gross or hourly pay, pay frequency, federal W-4 information, NJ-W4 settings, and applicable deductions. The calculator estimates federal income tax, FICA, New Jersey income tax, state payroll contributions, and optional local tax. It subtracts those amounts and your deductions from gross pay to estimate your net paycheck.
Does the New Jersey paycheck calculator include federal taxes?
Yes. The calculator includes federal income-tax withholding, Social Security, Medicare, and Additional Medicare when its coded threshold is crossed. Federal income tax uses the selected filing status and the W-4 fields for multiple jobs, dependents, other income, deductions, and extra withholding.
Does this calculator handle overtime pay?
Yes. Switch the calculator to Hourly mode and enter regular, overtime, and double-time hours. Regular hours use the normal hourly rate. Overtime is calculated at 1.5 times the hourly rate, while double-time hours use 2 times the hourly rate. Those amounts are combined before taxes and deductions are calculated.
How does a 401(k) contribution affect the paycheck calculation?
The calculator subtracts a traditional 401(k) or 403(b) contribution from income used for federal and New Jersey income-tax calculations. It does not subtract that contribution from wages used for Social Security, Medicare, NJ UI/WF/SWF, TDI, or FLI. The contribution itself is also included in total paycheck deductions.
How does the calculator handle a bonus in New Jersey?
You can combine the bonus with regular wages or use the calculator’s separate supplemental method. Under the separate option, the code calculates regular income-tax withholding separately, then applies 22% federal withholding and a 5.8% New Jersey supplemental rate to the bonus. FICA and applicable NJ payroll contributions still use the applicable gross-pay subject amount.
Why does the calculator ask for year-to-date gross pay?
Year-to-date gross pay lets the calculator check annual wage bases and thresholds. The code uses it for the $184,500 Social Security wage base, the $44,800 NJ UI/WF/SWF wage base, the $171,100 NJ TDI and FLI wage bases, and the $200,000 Additional Medicare threshold.
How accurate is the New Jersey paycheck calculator?
The result is an estimate based on the information you enter and the 2026 rules coded into the calculator. It can model common paycheck components, but it does not guarantee the amount an employer will withhold. Actual payroll can differ because of tax updates, benefit arrangements, employer systems, or circumstances the calculator does not cover.