It is almost guaranteed that the calculator will INTENTIONALLY ignore and misrepresent the negative effect of the 15.3% FICA payroll tax that workers and consumers pay 100% of in pass through. So any claimed benfit is distorted. End taxation of labor, capital, investment, gifts and death and go to a single rate, simple, visible and efficient national retail sales tax on new goods and services with a monthly tax refund/tax credit option #FAIRtax. FAIRtax.org/faq