# StateTaxCalculator.online

> StateTaxCalculator.online is a high-precision, privacy-first paycheck and state income tax calculation engine modeling published 2026 Internal Revenue Code (IRC § 1) federal tax brackets, FICA payroll statutory limits ($181,800 Social Security cap), and all 50 US state and DC tax schedules. All calculations execute entirely client-side with zero wage data retention.

## Core Computational Workbenches

- [State & Federal Income Tax Calculator](https://statetaxcalculator.online/): Master paycheck calculation engine providing gross-to-net pay breakdown, federal withholding, FICA deduction schedules, and progressive state income tax across all 51 US jurisdictions.
- [50-State Progressive Rates & Zero-Tax State Guides](https://statetaxcalculator.online/state-income-tax-calculators/): Comprehensive state tax schedules comparing zero-tax jurisdictions (AK, FL, NV, NH, SD, TN, TX, WA, WY), flat-tax regimes, and graduated marginal brackets.
- [Federal Tax Brackets & Deductions](https://statetaxcalculator.online/federal-tax-brackets-deductions/): Verified 2026 federal income tax rates (10% to 37%), standard deductions ($15,000 Single / $30,000 Married Filing Jointly), and Medicare surtax thresholds.
- [Interstate Tax Comparisons & Relocation Arbitrage](https://statetaxcalculator.online/interstate-tax-comparisons/): Dual-state moving liability simulator modeling statutory domicile rules, 183-day physical presence thresholds, and 10-year net take-home arbitrage.

## Institutional Governance & Research Desk

- [Statutory Telemetry Desk & About](https://statetaxcalculator.online/about/): Empirical mathematical models, regulatory source citations, and statutory data verification standards.
- [Privacy Policy](https://statetaxcalculator.online/privacy-policy/): Strict 100% ephemeral client-side processing architecture with zero server-side data retention.
- [Terms of Service](https://statetaxcalculator.online/terms-of-service/): Statutory safe harbor disclaimers and non-advisory computational modeling disclosures.
- [Complete Site Architecture](https://statetaxcalculator.online/sitemap/): Full human-navigable and machine-crawlable site index.

## Machine-Readable Resources

- [XML Sitemap Index](https://statetaxcalculator.online/sitemap-index.xml): Search engine crawler index.
- [Canonical XML Sitemap](https://statetaxcalculator.online/sitemap.xml): Direct XML page catalog.
- [Robots Policy](https://statetaxcalculator.online/robots.txt): Traditional and AI crawler directives.
- [LLM Comprehensive Specification](https://statetaxcalculator.online/llms-full.txt): Detailed mathematical formulas, tax brackets, and schema definitions.
- [Media RSS Feed](https://statetaxcalculator.online/rss.xml): RSS 2.0 with 16:9 high-resolution Discover media enclosures.