Which term is defined as the tax rate on the next dollar of taxable income?

Which term is defined as the tax rate on the next dollar of taxable income?

• A. Effective Tax Rate
• B. Investment Tax Credit
• C. Marginal Tax Rate
• D. Rate of Return

Answer: (C)

Marginal tax rate is the tax rate applied to the next dollar of taxable income. In a progressive system, income is taxed in brackets, so the amount you earn beyond your current level is taxed at the rate of the bracket you’re in for that extra dollar. This rate matters for incremental decisions—if you earn one more dollar, how much tax that dollar faces depends on your marginal rate, and possibly a higher bracket if you cross a threshold. The effective tax rate, by contrast, is the overall tax paid divided by total income, giving an average rather than the rate on the next dollar. The investment tax credit is a credit that reduces tax owed dollar-for-dollar, not a rate applied to income, and the rate of return describes investment earnings, not tax brackets.

Marginal tax rate is the tax rate applied to the next dollar of taxable income. In a progressive system, income is taxed in brackets, so the amount you earn beyond your current level is taxed at the rate of the bracket you’re in for that extra dollar. This rate matters for incremental decisions—if you earn one more dollar, how much tax that dollar faces depends on your marginal rate, and possibly a higher bracket if you cross a threshold. The effective tax rate, by contrast, is the overall tax paid divided by total income, giving an average rather than the rate on the next dollar. The investment tax credit is a credit that reduces tax owed dollar-for-dollar, not a rate applied to income, and the rate of return describes investment earnings, not tax brackets.