# JustPaycheck

> Programmatic micro-tools and payroll calculators for US federal, state, and international take-home pay, tax deductions, and payroll withholding.

## Calculators & Tools

- [Federal Paycheck Calculator](https://justpaycheck.com/): Free instant 2026 US paycheck calculator with 2026 IRS federal tax brackets, Social Security, and Medicare withholding.
- [50-State Paycheck Directory](https://justpaycheck.com/paycheck-calculator/): Interactive state income tax paycheck calculators for all 50 US States and Washington D.C.
- [Salary Paycheck Calculator](https://justpaycheck.com/salary-calculator/): Calculate annual salary take-home pay and net monthly earnings across all 50 US states.
- [Hourly & Overtime Calculator](https://justpaycheck.com/hourly-calculator/): Calculate hourly wages, statutory 1.5x FLSA overtime pay, and net take-home earnings.
- [Overtime & "No Tax on Overtime" Calculator](https://justpaycheck.com/overtime-calculator/): Model overtime earnings under proposed and existing federal overtime tax rules.
- [Bonus Tax Calculator](https://justpaycheck.com/bonus-tax-calculator/): Calculate flat 22% federal supplemental wage withholding and state tax on bonus payouts.
- [Gross-Up Calculator](https://justpaycheck.com/gross-up-calculator/): Calculate employer gross bonus payments required to deliver an exact net dollar target.

## International Calculators

- [España — Calculadora de Sueldo Neto](https://justpaycheck.com/es/calculadora-sueldo-neto/): Calcula tu salario neto a partir del bruto en España con retenciones de IRPF y Seguridad Social (12 y 14 pagas).
- [Deutschland — Brutto-Netto-Rechner](https://justpaycheck.com/de/brutto-netto-rechner/): Gehaltsrechner für Deutschland mit Steuerklassen I-VI, Solidaritätszuschlag und Sozialabgaben 2026.
- [France — Salaire Brut en Net](https://justpaycheck.com/fr/salaire-brut-net/): Simulateur officiel de salaire brut à net pour cadres et non-cadres avec prélèvement à la source.
- [México — Calculadora de Sueldo Bruto a Neto](https://justpaycheck.com/mx/calculadora-de-sueldo-bruto-a-neto/): Calcula el salario neto con tablas de ISR 2026 y cuotas obreras del IMSS.
- [Italia — Calcolo Stipendio Netto](https://justpaycheck.com/it/calcolo-stipendio-netto/): Calcola lo stipendio netto mensile dal lordo (RAL) con scaglioni IRPEF e contributi INPS.
- [Nederland — Bruto-Netto Calculator](https://justpaycheck.com/nl/bruto-netto-calculator/): Bereken het netto maandsalaris met de heffingskorting en arbeidskorting 2026.
- [Brasil — Calculadora de Salário Líquido](https://justpaycheck.com/pt/calculadora-salario-liquido/): Cálculo do salário líquido com tabela do INSS progressivo e deduções do IRPF 2026.

## 2026 Core US Tax Parameters

- Standard Deduction: Single ($16,100), Married Filing Jointly ($32,200), Head of Household ($24,150)
- Social Security Wage Base Limit: $184,500 at 6.2% withholding (Max $11,439.00 employee contribution)
- Medicare Tax: 1.45% base on all wages, +0.9% additional over $200,000 (Single) / $250,000 (Married)
- Supplemental Bonus Federal Withholding: Flat 22% (37% over $1,000,000)

## State Tax Categorization

- Zero Tax States: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming.
- Flat Tax States: Arizona, Colorado, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Michigan, Mississippi, North Carolina, Pennsylvania, Utah.
- Progressive Bracket States: California, New York, New Jersey, Hawaii, Minnesota, Oregon, Wisconsin, Maryland, etc.

## Machine-Readable Resources & Documentation

- [Full Documentation](https://justpaycheck.com/llms-full.txt): Comprehensive 2026 tax formulas, bracket limits, standard deductions, and state tax rules.
- [API Catalog](https://justpaycheck.com/.well-known/api-catalog): Machine-readable catalog of all calculator endpoints.
- [Sitemap](https://justpaycheck.com/sitemap-index.xml): XML sitemap of all site pages.
- [Robots.txt](https://justpaycheck.com/robots.txt): Machine crawler instructions.