Dr Ola Bennett owns a dental practice through a single-member limited liability company treated as a sole proprietorship for tax purposes. Dentistry is a specified service trade or business. This year the practice produced 300,000 dollars of qualified business income and paid 100,000 dollars of W-2 wages to its staff. Ola files jointly with her husband and their taxable income before any qualified business income deduction is 560,000 dollars. Assume the taxable income threshold for a married couple filing jointly is 400,000 dollars and that the phase-in range above it is 100,000 dollars. What is the qualified business income deduction?
- A50,000 dollars
- B0 dollars Correct
- C60,000 dollars
- D112,000 dollars
Why A is wrong: This applies the 50 percent of W-2 wages limitation to the 100,000 of staff wages. That limitation governs a business that is not a specified service trade or business above the threshold, but here the income is excluded before any wage test is reached.
Why B is correct: Taxable income of 560,000 sits above the top of the phase-in range at 500,000. For a specified service trade or business above that point, none of the income and none of the wages count as qualified, so no deduction survives.
Why C is wrong: This takes 20 percent of the 300,000 of qualified business income and ignores the specified service restriction entirely. It is the answer for a taxpayer below the threshold, or for a business outside the specified service category with sufficient wages.
Why D is wrong: This takes 20 percent of the 560,000 of taxable income. Taxable income sets an overall ceiling on the deduction rather than its starting point, and in any event the specified service restriction removes the deduction altogether at this income level.