Calculating the Qualified Business Income Deduction

By Jason Watson, CPA
Posted Wednesday, November 1, 2023

The basic Section 199A pass-through deduction is 20% of net qualified business income, which is huge. If you make $200,000, the deduction is $40,000 times your marginal tax rate of 24% which equals $9,600 in your pocket. Who says Obamacare isn’t affordable now?

Here is the exact code-

(2) DETERMINATION OF DEDUCTIBLE AMOUNT FOR EACH TRADE OR BUSINESS. The amount determined under this paragraph with respect to any qualified trade or business is the lesser of-

(A) 20 percent of the taxpayer’s qualified business income with respect to the qualified trade or business, or

(B) the greater of-

(i) 50 percent of the W-2 wages with respect to the qualified trade or business, or

(ii) the sum of 25 percent of the W-2 wages with respect to the qualified trade or business, plus 2.5 percent of the unadjusted basis immediately after acquisition of all qualified property.

There are some devils in the details of course. The best way is to show some examples which we do later in the following chapter. For now, let’s define some terms especially the specified service trade or business designation.