
Section 199A's SSTB Cliff: Why Doctors, Lawyers, and Consultants Lose the 20 Percent QBI Deduction
Section 199A's SSTB rule denies the 20 percent qualified business income deduction to high-earning doctors, lawyers, consultants, and financial advisors. In 2026 the joint-filer phase-out runs from $403,500 to $553,500, and OBBBA added a permanent $400 minimum deduction for active business owners.










