Which statement about ETR is commonly true?

Which statement about ETR is commonly true?

• A. ETR Equals MTR
• B. ETR Is Often Lower Than MTR
• C. ETR Equals Statutory Tax Rate
• D. ETR Is Irrelevant to PBT

Answer: (B)

Understanding the difference between effective tax rate and marginal tax rate is key. The effective tax rate (ETR) is the total tax paid divided by pretax income, giving a single average rate across all income. The marginal tax rate (MTR) is the rate that applies to the next dollar of income—the rate at the top of the tax bracket that the last dollar of income falls into. In practice, tax systems are designed with deductions, credits, depreciation, and other incentives that reduce the actual tax bill relative to pretax income. Because much of income often falls into lower brackets than the top rate, the average tax paid ends up lower than the highest bracket rate. Tax credits further reduce the tax payable, lowering the ETR even more. So it’s common to see ETR below the MTR. The other statements are not generally true: the ETR is not typically equal to the marginal rate or the statutory rate, since those refer to bracket structures and legislated rates, not the actual average tax paid after all adjustments. And ETR is not irrelevant to pretax income, since it is defined as taxes paid divided by pretax income.

Understanding the difference between effective tax rate and marginal tax rate is key. The effective tax rate (ETR) is the total tax paid divided by pretax income, giving a single average rate across all income. The marginal tax rate (MTR) is the rate that applies to the next dollar of income—the rate at the top of the tax bracket that the last dollar of income falls into.

In practice, tax systems are designed with deductions, credits, depreciation, and other incentives that reduce the actual tax bill relative to pretax income. Because much of income often falls into lower brackets than the top rate, the average tax paid ends up lower than the highest bracket rate. Tax credits further reduce the tax payable, lowering the ETR even more. So it’s common to see ETR below the MTR.

The other statements are not generally true: the ETR is not typically equal to the marginal rate or the statutory rate, since those refer to bracket structures and legislated rates, not the actual average tax paid after all adjustments. And ETR is not irrelevant to pretax income, since it is defined as taxes paid divided by pretax income.