A client asks about what the marginal tax rate is. How do you respond? p. The marginal tax rate is calculated by dividing the total amount of net taxes owing by faxable income. b. The marginal tax rate is the rate applicable to each additional dollar of income a taxpayer earns. c. The marginal tax rate gives taxpayers an idea of their actual income tax burden d The marginal tax rate is often used in payroll calculations where there is interest in knowing how much tax will be paid in total