SalaryHow Calculation Methodology

SalaryHow uses transparent formulas and published tax rules to estimate salary conversions and paycheck amounts. This page explains how our calculators work, the assumptions they use, and the official sources behind our 2026 tax calculations.

1. Salary Conversion Calculators

The Hourly to Salary and Salary to Hourly calculators, and hourly-rate pages and annual-salary pages, use the same underlying schedule and formulas.

• Default schedule: 40 hours per week, 52 weeks per year, 5 working days per week — 2,080 working hours per year.
• Weekly = hourly rate × hours per week.
• Annual = weekly pay × weeks per year.
• Monthly = annual pay ÷ 12.
• Biweekly = weekly pay × 2.
• Semi-monthly = annual pay ÷ 24.
• Daily = weekly pay ÷ days per week.

These calculators let you adjust hours per week, weeks per year, and days per week in Advanced Options — changing any of these changes every derived conversion, since each figure above is computed directly from the schedule you set, not from a fixed table.

2. Overtime Estimates

Hourly-rate pages show an overtime estimate: pay for hours worked beyond 40 in a week, calculated at 1.5× ("time and a half") of the base hourly rate. This is a common overtime formula used for illustration — it is not a determination that any specific worker is legally entitled to overtime pay.

Actual overtime eligibility depends on factors this calculator does not know about a given job, including:

• employee classification (hourly vs. salaried)
• exemption status under federal and state law
• actual hours worked in a given week
• state-specific overtime rules, which can be more protective than federal law

For official guidance on who is covered, see the U.S. Department of Labor, Wage and Hour Division — Overtime Pay.

3. Unpaid Time Off

SalaryHow's unpaid-time-off figures answer a narrow mathematical question: if a given amount of working time is unpaid, how does that change gross annual earnings at the rate or salary you entered? These figures do not determine whether an employer must pay for time off, whether a specific employee is entitled to paid leave, or what a particular employer's leave policy provides.

Federal law generally does not require employers to pay employees for time not worked — that includes vacation, personal time, and holidays. Whether such time is paid is typically a matter of agreement between an employer and employee. See the U.S. Department of Labor — Leave Benefits.

4. Federal Holiday Assumptions

SalaryHow's federal holiday scenarios illustrate how missing one or more of the 11 U.S. federal holidays would affect annual income, if those days are unpaid. A few distinctions matter here:

• Federal holidays are recognized non-working days for federal employees.
• A federal holiday does not, by itself, create a legal right to paid time off for private-sector employees — whether a private-sector employee is paid for a given holiday is determined by their employer's policy, not by federal law.
• SalaryHow's holiday-impact figures are mathematical scenarios based on the rate or salary you entered, not a determination of what any employer owes a specific employee.

See the U.S. Department of Labor — Holidays for official guidance on holiday pay.

5. Occupational Wage Information

Some FAQ answers on hourly and annual salary pages list example job titles associated with a general pay range (for example, "jobs that may pay around $25 per hour"). These lists are hand-selected, illustrative job titles meant to give context to a wage or salary figure. They are not statistical output from a wage survey, and are not currently derived from U.S. Bureau of Labor Statistics data or any other wage dataset.

Actual wages for any occupation vary substantially by location, employer, industry, experience, and qualifications. A job title appearing in one of these lists is not a claim that the role pays any particular amount.

For authoritative, data-based wage figures by occupation, see the U.S. Bureau of Labor Statistics — Occupational Employment and Wage Statistics (OEWS), which publishes mean and median wage estimates by occupation at the national, state, and metropolitan-area level.

6. Paycheck Calculator Methodology

The Paycheck Calculator estimates employee paycheck withholding for tax year 2026 — a different, more detailed calculation than the salary conversion tools above. It is built on a dedicated tax engine that follows official government withholding rules step by step:

• Gross pay: annual salary ÷ pay periods per year (for salaried pay), or hourly rate × hours worked (for hourly pay).
• Pay frequency: weekly (52/year), biweekly (26/year), semi-monthly (24/year), or monthly (12/year) — used to annualize and de-annualize every withholding calculation consistently.
• Federal income tax withholding: computed from your Form W-4 inputs (filing status, multiple jobs, dependents, other income, deductions, extra withholding) using the IRS Publication 15-T (2026) percentage method, Worksheet 1A.
• Social Security: 6.2% of taxable wages up to the 2026 Social Security wage base, correctly stopping once your year-to-date wages reach the annual cap.
• Medicare: 1.45% of taxable wages, with no wage cap, plus an Additional Medicare Tax of 0.9% on wages over $200,000 in a calendar year (an employer-withholding rule, applied the same way regardless of filing status).
• State income tax withholding: calculated using each state's own official 2026 method — graduated brackets, a flat rate, or an elective percentage, depending on the state.
• State-specific employee payroll taxes: where a state has an employee-paid payroll tax beyond income tax (for example, disability or paid-leave insurance), it's calculated separately and shown as its own line item — never merged into the state income tax figure.
• Local taxes: only applied when you select a supported local jurisdiction, or provide an explicit local rate where the state requires one — see Local Tax Limitations below.
• Traditional 401(k): excluded from federal and state taxable wages, but still subject to Social Security and Medicare.
• Roth 401(k): after-tax for all payroll taxes — no withholding effect.
• Other deductions: pre-tax and post-tax deductions you add are applied to the wage bases they affect before the relevant taxes are calculated.
• Year-to-date (YTD) wages: used to apply the Social Security wage base and Additional Medicare Tax threshold correctly, and for the handful of states whose supplemental payroll tax has its own annual wage-base cap.
• Rounding: every calculation uses plain decimal dollars, rounded to the cent once, at the final result — not at each intermediate step — matching how the underlying IRS and state worksheets are themselves written.
• Gross-to-net: take-home pay = gross pay − total taxes − total deductions − garnishments, never less than $0.

Paycheck withholding estimate vs. final annual tax liability: the Paycheck Calculator estimates payroll withholding and take-home pay for a single paycheck — it is not an income tax return calculator, and it does not estimate your final annual tax liability or refund. Actual withholding and year-end tax owed can differ based on your full-year income, other deductions and credits, and how your employer administers payroll.

Known limitations: HSA and FSA contributions are not yet modeled (their correct tax treatment depends on plan details this calculator can't assume). Pre-2020 Form W-4 allowances are not supported. Local income tax coverage is intentionally partial — see the Local Tax Limitations section below.

7. Federal Tax Sources

These are the authoritative federal sources used to build the Paycheck Calculator's 2026 federal withholding logic:

• Internal Revenue Service — Publication 15-T (2026), Federal Income Tax Withholding Methods — Worksheet 1A and the 2026 Percentage Method Tables
• Internal Revenue Service — Publication 15 (2026), Employer's Tax Guide
• Social Security Administration — 2026 Social Security wage base ($184,500) announcement
• Internal Revenue Service — Form 8959 instructions — Additional Medicare Tax (0.9% above $200,000)

8. 2026 State Tax Sources

Every state's 2026 withholding method is based on an official source published by that state's department of revenue, taxation agency, or (for states with no individual income tax) the relevant constitutional provision. SalaryHow never uses third-party payroll calculators as an authoritative tax source.

9. Local Tax Limitations

Many U.S. cities, counties, municipalities, and school districts impose additional local income taxes on top of state and federal withholding. SalaryHow does not support every local tax in the United States.

• Not included — a real local tax exists in the state, but this calculator does not model it at all (for example, Alabama's municipal occupational tax or Ohio's RITA/CCA-administered municipal income tax). These states show a local income tax of $0, which reflects what this calculator computes, not a claim that no local tax is actually owed.
• Supported — a specific local jurisdiction (like New York City, Yonkers, or Wilmington) is modeled and applied only when you select it.
• Explicit rate input required — local tax varies by jurisdiction in a way this calculator can't look up automatically (for example, Pennsylvania's Act 32 local Earned Income Tax); you can enter your own local rate for a more accurate estimate.
• N/A — no local wage income tax exists in that state.

Local taxes are never assumed or auto-applied — they're only included when you explicitly provide the relevant jurisdiction or rate.

10. Accuracy and Updates

SalaryHow maintains tax-year-specific configuration. The current tax year supported is 2026. Tax rules change — federal and state agencies periodically update withholding tables, wage bases, and rates — and SalaryHow updates its calculation data when new official tax-year guidance is published and incorporated.

SalaryHow is an independent calculator built on published government withholding rules. It is not a real-time government data feed, not government-certified, and not a substitute for professional tax advice.

Last updated: August 29, 2026

11. How Calculations Are Reviewed

SalaryHow calculations are implemented using published formulas and official government guidance. Calculation logic is validated with automated tests, and paycheck withholding logic is compared against official worksheets and examples where available. Tax rules are checked against current IRS, Social Security Administration, U.S. Department of Labor, and state tax agency publications when the calculation engine is updated.

Calculations are not individually reviewed by a CPA, tax attorney, or payroll professional. SalaryHow is an independent informational tool, not a professional tax, legal, financial, or payroll advisory service.

12. Editorial and Calculation Standards

SalaryHow follows a consistent hierarchy when building a calculation:

• Official federal and state government publications supply tax rules, thresholds, and rates.
• For occupational wage examples, the U.S. Bureau of Labor Statistics OEWS program is the authoritative external source for real wage data — see Occupational Wage Information above for how SalaryHow currently uses (and does not use) it.
• SalaryHow's own calculation engine applies official inputs mathematically to produce salary conversions and paycheck estimates.
• Where a scenario is illustrative rather than a direct calculation — such as overtime or holiday-impact estimates — SalaryHow identifies the assumption being used rather than presenting it as fact.

A government publication providing a tax rate or legal threshold does not mean that agency produced, reviewed, or endorses SalaryHow's calculators or their results.

13. Known Limitations

• Salary conversion estimates are mostly deterministic mathematical conversions based on the schedule assumptions (hours per week, weeks per year) you select or that default to 40 hours and 52 weeks — they are not a prediction of your actual pay.
• Paycheck estimates are more complex and can be affected by filing status, deductions, employer payroll configuration, state and local taxes, year-to-date wages, and other individual circumstances — see the paycheck-specific limitations above and the Local Tax Limitations section.
• Occupation data shown in FAQ answers is illustrative job-title information, not a promise of earnings — see Occupational Wage Information above.
• Overtime and holiday scenarios are illustrative calculations, not determinations of legal eligibility — see Overtime Estimates and Federal Holiday Assumptions above.

14. Disclaimer

SalaryHow calculations are estimates for informational purposes only. Actual pay and tax withholding may vary based on your employer's payroll system, elections, deductions, benefits, local taxes, and individual circumstances. SalaryHow does not provide tax, legal, or financial advice. See our Terms of Service for our full disclaimer.

For paycheck-specific estimates, try the Paycheck Calculator. For simple wage conversions, try Hourly to Salary or Salary to Hourly.