Which statement about pre-tax deductions is true?

• A. They reduce taxable income and take-home pay by the deduction amount; tax savings offset part of the net drop.
• B. They increase taxes owed.
• C. They have no effect on take-home pay.
• D. They only affect post-tax dollars.

Answer: (A)

Pre-tax deductions work by lowering the amount of income that is taxed, which reduces the taxes you owe. So when you take money out of your pay before taxes, your taxable income drops by that deduction amount, and your tax bill goes down by roughly the tax rate times that amount. Your take-home pay, which is what you actually take home after taxes, is still reduced by the deduction itself, but the tax savings lessen that hit. In other words, the change in take-home pay equals negative the deduction plus the tax savings from having the lower taxable income. If the tax savings don’t fully cover the deduction, take-home pay falls by more than the tax savings; if the tax savings were equal to or larger than the deduction, the impact would be different. A simple way to see it is: pre-tax deductions reduce taxable income, which lowers taxes; that tax saving partially offsets the reduction in take-home pay caused by the deduction.