Tax Rule Updates & Change Log
We maintain a public, verifiable record of all tax code updates, statutory bracket indexations, and calculation engine enhancements.
Version 2.0.0
Major Release: 10-State Verified Calculator Network & 2026 Engine Audit
Comprehensive audit and validation of all federal and state withholding models for Tax Year 2026.
Detailed Changelog:
- Validated IRS Publication 15-T Percentage Method withholding tables for 2026.
- Updated Social Security wage base limit to $181,800 with automated capping logic.
- Confirmed Additional Medicare 0.9% employer withholding threshold at $200,000.
- Verified California Method B schedules (FTB & EDD DE 44), confirming uncapped 1.2% SDI under SB 951.
- Expanded launch coverage with 10 verified state calculators: CA, TX, FL, NY, WA, IL, PA, OH, GA, AZ.
- Published full 16-guide editorial library with comprehensive payroll and tax education.
- Automated Vitest test suite with 76 reference fixtures and edge cases passing 100%.
Version 1.2.0
Annual Federal Cost-of-Living Bracket Indexation
Adjusted federal percentage method bracket thresholds and standard deductions for inflation.
Detailed Changelog:
- Expanded federal bracket thresholds across Single, Married Filing Jointly, and Head of Household.
- Updated Form W-4 Step 4(b) standard deduction baseline.
- Refreshed state-specific exemption allowance credits.
Version 1.0.0
Initial Production Release
Foundation launch of WageTakeHome educational calculator platform.
Detailed Changelog:
- Initial release of core calculation engine with pure TypeScript architecture.
- California pilot calculator with DE 44 Method B calculations.
- Eight cornerstone payroll guides covering FICA, W-4, 401(k), and pay schedules.