CodexaTools is a free, blazing-fast payroll & tax calculation engine for US workers. Evaluating a job offer or planning a relocation? Calculate your exact net take-home pay with official 2026 IRS and state tax brackets across all 50 US states + DC. ✨ Key Features: • All 50 US States + DC Tax Models • 401(k), HSA & Child Tax Credits • Overtime (1.5x, 2x, CA Daily) & Wage Converters • 100% Free, Private, Zero Signup Required.