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Payroll Calculator Methodology

Last updated: June 2026

This page explains the general assumptions behind PayRulesHub calculators. Our calculators are built for fast educational estimates, not final payroll processing, tax filing, or legal decisions.

Overtime Pay Calculator

The overtime calculator starts with regular hourly pay and hours worked. For typical federal overtime scenarios, it estimates time-and-a-half for eligible hours over 40 in a workweek. Where state examples are discussed, we explain that state rules may include daily overtime, double time, exemptions, or industry-specific differences.

Basic formula: overtime hours × hourly rate × overtime multiplier.

PTO Accrual Calculator

The PTO calculator estimates earned paid time off based on a stated accrual rate or annual PTO allowance. It can help compare per-pay-period, monthly, or annual accrual patterns, but actual PTO balances depend on employer policy, caps, waiting periods, carryover rules, and usage history.

Hourly to Salary Calculator

The hourly-to-salary calculator multiplies an hourly rate by expected weekly hours and annualizes the result. It also breaks estimated pay into monthly, biweekly, weekly, and daily equivalents. The estimate assumes a consistent schedule and does not guarantee exempt/nonexempt status.

Take-Home Pay Estimator

The take-home pay estimator uses simplified withholding assumptions to approximate net pay after federal taxes, FICA, state tax assumptions, and deductions. Actual take-home pay can change based on W-4 elections, filing status, credits, pretax benefits, retirement contributions, local taxes, and payroll provider calculations.

Severance Pay Calculator

The severance calculator estimates payouts using common formulas such as one week or two weeks of pay per year of service. Severance is not guaranteed by the calculator and depends on employer policy, agreements, releases, tenure, and applicable law.

State-Specific Guides

State pages are written to explain general concepts and point readers toward relevant issues, such as final paycheck deadlines, PTO payout rules, overtime standards, or wage claim steps. They are not a substitute for official state agency guidance or professional advice.

Why Results May Differ From Actual Payroll

  • Employer-specific policies and payroll calendars
  • Federal, state, and local tax elections or exemptions
  • Pretax deductions, benefits, retirement plans, and garnishments
  • Industry-specific wage rules or exemptions
  • Manual payroll corrections, bonuses, commissions, or retroactive pay

Questions or Corrections

If a formula looks wrong or a state-specific note appears outdated, contact us at support@payruleshub.com and include the page URL plus the source you are comparing.