Specialized engines for the complex edge cases standard payroll software misses.
FREE tools are available to everyone.PRO PLAN tools require a subscription.
Calculate the "Regular Rate of Pay" correctly when nondiscretionary bonuses are involved to ensure FLSA compliance.
Launch CalculatorDetermine the exact gross amount needed to give an employee a specific net bonus, handling all taxes automatically.
Launch CalculatorCalculate retroactive payments for raises that were effective in the past, including overtime adjustments.
Launch CalculatorBasic version is free. Advanced W-4 unlocks Step 2(c) guidance, scenario comparisons, and compliance PDFs.
Launch CalculatorThe flagship tool. Determine Alien Tax Status (SPT), Treaty Eligibility, and generate 8233/W-8BEN forms instantly.
Launch CalculatorDetermine where remote employees owe state & local taxes. Checks reciprocity rules automatically.
Launch Calculator (Pro Plan)Resolve conflicting court orders (levies, child support) using federal CCPA priority rules.
Launch Calculator (Pro Plan)Use the IRS 20-factor test to determine if a worker should be classified as an employee or independent contractor.
Launch Tool