NJ Salary Calculator Methodology
Calculation scope
Models a typical New Jersey resident W-2 employee for tax year 2026. Estimates annual and per-period net pay from gross wages using published federal and New Jersey rules. Not a substitute for employer payroll or professional tax advice.
Gross income
Annual mode uses entered gross wages. Hourly mode: hourly rate × hours per week × 52. Bonuses, overtime rules, and irregular pay are not modeled separately.
Federal income tax
Taxable income = gross wages minus the 2026 federal standard deduction for the selected filing status. Tax is computed marginally across IRS brackets from Revenue Procedure 2025-32. Itemized deductions and credits are not included.
New Jersey income tax
NJ taxable income = gross wages minus personal exemption amounts ($1,000 single/MFS/HOH taxpayer; $2,000 MFJ). Tax uses Table A (single, MFS) or Table B (MFJ, HOH) schedules from the Division of Taxation. Dependent exemptions and property tax deductions are not included.
Social Security
Employee share at 6.2% on wages up to the 2026 wage base from SSA publications.
Medicare
Employee Medicare at 1.45% on all covered wages. Additional Medicare at 0.9% on wages above the threshold for the selected filing status.
NJ employee payroll contributions
UI and WF/SWF use the $44,800 calendar-year wage base. TDI and FLI use the $171,100 employee wage base. Each rate applies only to wages within its cap (see parameter table).
Pay frequency conversion
| Frequency | Periods per year |
|---|---|
| Weekly | 52 |
| Biweekly | 26 |
| Semi-monthly | 24 |
| Monthly | 12 |
| Annual | 1 |
Per-period take-home = annual net ÷ periods. Rounding may cause small differences versus multiplying a single paycheck by periods.
Filing status assumptions
Federal brackets, standard deduction, and Additional Medicare threshold follow the filing status you select. New Jersey table selection follows the same status mapping (Table A vs Table B).
Excluded deductions and credits
- Itemized federal or NJ deductions
- Most tax credits
- Pre-tax 401(k), HSA, FSA, health premiums
- 1099 / self-employment income
- Multi-state wage allocation
- Supplemental wage withholding rules
Rounding and result calculation
Internal math uses full precision. Displayed dollars round to cents or whole dollars where noted. Take-home = gross minus federal tax, NJ tax, FICA, and NJ employee payroll totals.
2026 tax inputs
| Component | 2026 rule | Source | How it is used |
|---|---|---|---|
| Federal standard deduction (single) | $16,100 | IRS Rev. Proc. 2025-32 | Reduces federal taxable wages |
| Federal standard deduction (MFJ) | $32,200 | IRS Rev. Proc. 2025-32 | Reduces federal taxable wages |
| Social Security (employee) | 6.2% up to $184,500 | SSA / IRS Form 941 | Employee FICA on covered wages |
| Medicare (employee) | 1.4500000000000002% on wages; +0.8999999999999999% above threshold | IRS | Employee Medicare withholding estimate |
| NJ UI (employee) | 0.3825% up to $44,800 | NJ DOL / M-6025 | NJ unemployment insurance employee share |
| NJ WF/SWF (employee) | 0.0425% up to $44,800 | NJ DOL | Workforce development funds |
| NJ TDI (employee) | 0.19% up to $171,100 | NJ DOL | Temporary disability insurance |
| NJ FLI (employee) | 0.23% up to $171,100 | NJ DOL | Family leave insurance |
| NJ personal exemption | $1,000 taxpayer ($2,000 MFJ); no dependents modeled | NJ Division of Taxation | Reduces NJ taxable wages |
| NJ income tax | Progressive Tables A and B (2020 and after schedule) | NJ Division of Taxation | State income tax on NJ taxable income |
Calculator verification
Automated tests include representative gross wages such as $0, $25,000, $40,000, $50,000, $75,000, $100,000, $150,000, $200,000, $500,000, and $1,000,000; all pay frequencies; all filing statuses; hourly conversion; Social Security wage-base cap; NJ UI contribution at the wage cap; and monotonic federal/NJ tax with income. Competitor calculators are not used as test oracles.
Data-source verification
Parameters are checked against IRS, SSA, and New Jersey agency publications listed on the data sources page. Review dates are shown at the top of this page.
Update schedule
Updates are triggered by official tax-year releases, wage-base announcements, covered legislative changes, and confirmed errors. We do not update continuously or in real time.
Correction process
Found an error in a rate, source, or calculation? Report it on the contact page with the page URL, the figure in question, and a link to the official source you believe should be used.
Current verification
A separate /updates/ page will be added when multiple dated change records exist. Until then, use the review dates above and the data sources table for the latest verification snapshot.
Limitations
Results are estimates based on standard assumptions. Actual withholding may differ. See the disclaimer.
Primary sources
- Internal Revenue Service: 2026 inflation adjustments (Rev. Proc. 2025-32)
- Social Security Administration: contribution and benefit bases
- New Jersey Division of Taxation: income tax rates
- New Jersey M-6025 (2026 W-2 reporting / wage bases)
- New Jersey Department of Labor: contribution rates and wage bases
Why we publish the methodology
Tax and payroll rules change. Outputs depend on assumptions. Users should be able to see what is included, what is excluded, and which government documents support each input. Publishing methodology makes errors easier to spot and report.
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