Section 199A QBI Extension After 2025: OBBBA Changes, 2026 Thresholds, and Planning
What changed after the 2025 sunset risk, how the 2026 thresholds work, and where S corporation wages, UBIA, SSTB status, aggregation, and entity planning still matter.
Section 199A — the Qualified Business Income (QBI) deduction — is a major small-business provision for pass-through owners. It allows eligible owners of sole proprietorships, partnerships, S-corporations, and some trusts and estates to deduct up to 20% of qualified business income, subject to taxable-income thresholds, SSTB limits, W-2 wage limits, UBIA of qualified property, and other rules.
The old planning frame was "use it before the 2025 sunset." That is stale. Public Law 119-21, the One, Big, Beautiful Bill Act, amended Section 199A for taxable years beginning after December 31, 2025, including a new minimum deduction rule for active QBI. The current planning question is how to preserve and document the deduction under the post-2025 rules.
What Counts as Qualified Business Income
QBI is the net amount of qualified items of income, gain, deduction, and loss from a qualified trade or business — including:
• Business income from sole proprietorships (Schedule C).
• Pass-through income from partnerships and LLCs (Form 1065 K-1).
• Pass-through income from S-corporations (Form 1120-S K-1).
• Income from rental real estate, if it rises to the level of a trade or business (or qualifies under the Rev. Proc. 2019-38 safe harbor).
QBI does NOT include:
• W-2 wages earned as an employee or as an S-corp owner-employee.
• Reasonable compensation paid to S-corp owners.
• Guaranteed payments to partners (for services).
• Capital gains, dividends, interest income, and most other investment income.
• Income earned outside the United States.
The Three-Tier Application
The QBI deduction is calculated differently depending on the taxpayer's taxable income relative to threshold amounts. For taxable years beginning in 2026, IRS Revenue Procedure 2025-32 lists these threshold and phase-in range amounts:
• Married filing jointly: threshold $403,500; phase-in range ends at $553,500.
• Married filing separately: threshold $201,775; phase-in range ends at $276,775.
• All other returns: threshold $201,750; phase-in range ends at $276,750.
At or below the threshold, the W-2 wage, UBIA, and SSTB limitations generally do not reduce the deduction. Within the phase-in range, those limits phase in. Above the range, the limits apply fully.
Specified Service Trade or Business (SSTB) Carve-Out
The most consequential limitation is the SSTB exclusion. A specified service trade or business is one in which the principal asset is the reputation or skill of one or more employees or owners. Specifically defined SSTBs include:
• Health — physicians, dentists, veterinarians, pharmacists, chiropractors, physical therapists.
• Law — attorneys, paralegals, mediators, arbitrators.
• Accounting — CPAs, tax preparers, bookkeepers.
• Actuarial science.
• Performing arts — actors, musicians, performers.
• Consulting — providing professional advice and counsel (broadly interpreted).
• Athletics — professional athletes, athletic trainers.
• Financial services — financial advisors, investment managers, wealth managers, brokers, investment bankers, dealers in securities.
• Brokerage services — financial brokerage services require careful classification; real estate brokerage should be analyzed separately under the IRS rules and facts.
• Investing and investment management.
• Trading — including securities and commodities traders.
• Dealing in securities, partnership interests, or commodities.
• Any trade or business where the principal asset is the reputation or skill of one or more of its employees or owners (broad catchall).
Notably not SSTBs: engineering, architecture, real estate management, manufacturing, restaurants, retail, software development, most service businesses outside the listed categories.
Above the Phase-In Range: SSTB Owners May Lose the Deduction
For SSTB owners with taxable income above the full phase-in range, the §199A deduction can be eliminated for that SSTB. A high-earning attorney, doctor, accountant, consultant, or financial advisor needs to model whether taxable income is below, within, or above the applicable range.
For SSTB owners in the phase-in range, the deduction phases out proportionally — partial benefit available but reduced by the SSTB factor.
The W-2 Wage and UBIA Limit
For non-SSTB businesses with taxable income above the upper threshold, the deduction is limited to the GREATER of:
• 50% of the business's W-2 wages paid, or
• 25% of W-2 wages plus 2.5% of the unadjusted basis immediately after acquisition (UBIA) of qualified property.
For real estate-heavy businesses with low payroll (e.g., a real estate rental partnership), the UBIA component preserves significant deduction capacity. For service businesses with no real property, the W-2 wage limit becomes the binding constraint.
Planning Levers for the Phase-In Range
The phase-in range is where high-leverage planning occurs. For a pass-through owner with taxable income near the upper end of the range, additional taxable income can reduce the QBI deduction while also being subject to regular income tax.
Strategies to remain below or move below the threshold:
• Maximize 401(k) and qualified plan contributions based on plan design, owner compensation, and employee coverage rules.
• Defer year-end income into the following year (cash-basis taxpayers).
• Accelerate deductible expenses into the current year.
• HSA contributions when the owner is eligible under current-year rules.
• Charitable giving, particularly bunching strategies and donor-advised fund contributions.
• Cost segregation on owned business or rental real estate to generate large depreciation deductions.
• S-corp salary calibration — for S-corp owners in non-SSTB businesses, reducing reasonable W-2 compensation increases QBI but may run afoul of the reasonable compensation requirement.
Aggregation Election
Taxpayers with multiple related businesses may elect to aggregate them under §199A for purposes of applying the W-2 and UBIA limits. This can significantly increase the deduction when one business has high QBI but low wages and another has low QBI but high wages or property basis.
The aggregation election requires:
• Common ownership (50% or more by a single individual or group).
• The businesses share at least two of: products/services, customers, supply chains, or facilities/personnel.
• None of the businesses are SSTBs.
Once made, the aggregation election generally cannot be reversed for the year and applies to future years unless circumstances materially change.
Rental Real Estate Treatment
Rental real estate is treated as QBI only if it rises to the level of a "trade or business" under §162. The IRS provided a safe harbor in Rev. Proc. 2019-38:
• Separate books and records maintained for each rental enterprise.
• At least 250 hours of "rental services" performed per year (lower for older properties).
• Contemporaneous records documenting hours.
Properties that don't meet the safe harbor may still qualify as a trade or business under general §162 standards, but the analysis is more vulnerable to challenge.
Common Mistakes
• Failing to qualify rental income as QBI (missing the safe harbor or §162 documentation).
• Misclassifying a non-SSTB business as an SSTB (losing the deduction unnecessarily).
• Not aggregating related businesses that would benefit from combined W-2 wages.
• Failing to plan around the threshold — pushing taxable income above the threshold by failure to maximize retirement contributions.
• Setting S-corp reasonable compensation too low (causing reasonable comp issues) or too high (reducing QBI unnecessarily).
• Missing the deduction for net QBI losses carried forward (negative QBI from one year reduces the next year's QBI).
What Changed After the 2025 Sunset Risk
Section 199A planning did not end after 2025. Under the OBBBA amendments reflected in IRS 2026 inflation guidance, the deduction continues into post-2025 tax years with expanded phase-in ranges and a new minimum deduction rule for active qualified business income.
• Do not rely on old sunset planning memos. Re-run QBI projections under 2026 threshold and phase-in amounts.
• Model the S corporation wage tradeoff. Owner W-2 wages may reduce QBI but can support the W-2 wage limitation for non-SSTB businesses above the threshold.
• Update entity and compensation files. The deduction is more durable, but the documentation burden remains: business classification, SSTB analysis, aggregation, W-2 wages, UBIA, and loss carryforwards.
Bottom Line
Section 199A remains one of the most important provisions for eligible pass-through business owners. The mechanics are technical, the SSTB rules are unforgiving, and the threshold management opportunities are substantial. For business owners with taxable income approaching the §199A thresholds, the planning file should include a current-year projection, SSTB classification, W-2/UBIA review, aggregation analysis, and entity compensation review.
Post-2025 QBI planning needs current thresholds
Section 199A planning should now reference the OBBBA amendments, IRS 2026 inflation-adjusted thresholds, and the IRS QBI forms and instructions rather than old sunset-only guidance.
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