QBI Deduction Planning (Section 199A)

How it works

Section 199A lets an individual deduct up to 20% of qualified business income from a domestic pass-through trade or business, plus 20% of qualified REIT dividends and qualified publicly traded partnership income. It comes off taxable income rather than adjusted gross income, and it applies whether or not you itemize. At the top bracket, currently 37%, a full 20% deduction brings the effective rate on that income down to roughly 29.6%.

The deduction can never exceed 20% of taxable income minus net capital gain. A large capital-gain year shrinks that base, which can cap the deduction below 20% of qualified business income even though the business itself did not change. Everything else turns on one comparison: taxable income against a threshold set by filing status and adjusted for inflation every year. Below it, the full 20% applies with no further testing, on the simpler of the two IRS forms built for this deduction. At or above it, two limits phase in over a range that also varies by filing status, and apply in full past the top of that range.

I keep the actual dollar figures off this page on purpose, since they move every year and a stale number on a CPA's site is worse than none. The current thresholds live in my QBI deduction guide, worked through with this year's figures. What follows here is what that guide does not cover: how the mechanism behaves under pressure, and where it fails.

Above the threshold, a non-service business runs into a W-2 wage and property limitation: the deduction is capped at the greater of 50% of the W-2 wages it pays, or 25% of those wages plus 2.5% of the unadjusted basis of qualified property right after acquisition. The second branch favors capital-heavy, low-payroll businesses such as real estate. A specified service business faces a harsher test instead: once fully above the range, it loses the deduction entirely, no matter what it pays in wages.

The REIT and PTP piece runs on its own track. Twenty percent of qualified REIT dividends and PTP income faces neither the wage and property limitation nor the SSTB rules at any income level, though it still counts against the overall ceiling. The two arrive on different forms: REIT dividends show up in Box 5 of a 1099-DIV, while qualified PTP income comes through on a Schedule K-1.

The 2025 tax law made this deduction permanent, repealing the sunset scheduled for that year's end, and kept the rate at 20% rather than raising it, as one version of the bill proposed. The same law widened the phase-in range for tax years beginning after 2025, softening the cliff for an owner just over the threshold, and added a new minimum deduction for a small, active business with at least a modest amount of qualifying income and material participation by the owner. Both figures behind that floor are inflation-indexed and left off this page for the same reason as the thresholds above.

What this is worth in Florida

Florida has no individual income tax and does not tax pass-through income at the personal level, so Section 199A never touches a Florida return. Every dollar of benefit here is federal, which raises the stakes rather than lowering them: there is no state deduction to soften a mistake and no state refund to make a missed dollar less painful.

Who this applies to

The deduction reaches sole proprietorships filing on Schedule C, single-member LLCs, partnerships and multi-member LLCs reporting through a K-1, S corporations, and certain trusts, estates, and rental activities rising to a trade or business under Section 162. It does not reach a C corporation, wages, or guaranteed payments paid to an owner: working for your own business as an employee puts that income outside qualified business income entirely. Whether an entity election makes sense at all is covered in my Florida S-corp guide.

• What counts. Net income from an active domestic trade or business, the kind that shows up as the bottom line of a Schedule C or the ordinary business income on a partnership or S-corp K-1.
• What does not. Capital gains and losses, dividends and interest not allocable to the business, reasonable compensation paid to an S-corp owner-employee, and guaranteed payments to a partner. Each is carved out by the statute itself.

Above the threshold, the code treats one category more harshly than the rest: a specified service trade or business, an SSTB. The list covers health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, and investing, investment management, trading, or dealing, plus a catch-all for a business whose principal asset is the reputation or skill of an owner or employee, narrowed by regulation to endorsement income, licensing of image, likeness, or name, and appearance fees.

Accounting is on that list by name. My own firm is a specified service business for this purpose, and loses the deduction entirely once taxable income clears the top of the phase-in range, regardless of wages paid. Architecture and engineering were deliberately left off the list, so those firms keep the deduction at any income. If your business sits close to the line, your own SSTB exposure or a related one under common ownership, resolve it before the return is prepared, not while it is being prepared.

A side activity resembling a specified service does not automatically taint the whole business. A de minimis rule looks at the share of gross receipts the SSTB-type activity produced: under a size threshold, a business stays out of SSTB treatment as long as under 10% of gross receipts came from that activity, tightening to under 5% once the business grows past that threshold. The rule is all or nothing; cross the line and the entire business is treated as an SSTB.

What it requires

Which form applies follows the threshold question. At or below it, Form 8995 handles the computation on a single page: no wage or property test, no SSTB analysis. At or above it, or whenever an SSTB is in the picture near the range, Form 8995-A is required, with schedules for the SSTB computation, aggregation, loss netting, and cooperative patrons.

• The wage and property computation. Above the threshold, a non-SSTB business's deduction is capped at the greater of 50% of W-2 wages paid, or 25% of wages plus 2.5% of qualified property's unadjusted basis. Only wages the SSA received on a timely filed W-2 count.
• Aggregation, if you run more than one business. Pooling wages and property across businesses can rescue a deduction one would lose alone, but it needs five things at once: the same person or group owning at least 50% of each business; that ownership held for a majority of the year, including its last day; the same tax year for every business; none of them an SSTB; and at least two of three shared factors, related products or services, shared facilities or centralized functions, or coordinated operation.
• The REIT and PTP component, handled separately. Twenty percent of qualifying REIT and PTP income sits outside the wage, property, and SSTB tests, subject only to the overall taxable-income ceiling.
• A rental activity close to the trade-or-business line. A passive triple-net lease can fail the trade-or-business question under Section 162 outright. A safe harbor exists for rental real estate built around at least 250 hours a year of rental services, plus contemporaneous records, for when that question is close.

For an S-corp owner, the salary decision sits underneath all of this: it simultaneously sets qualified business income, since salary is not QBI, and sets the wage figure the above-threshold limitation is measured against. The two pulls do not point the same direction at every income level, and neither is a figure to set by feel.

What you need to document

Timely-filed W-2s

Wages count toward the wage limitation only if reported to the Social Security Administration on a timely filed W-2. A late or amended filing can fail the test for the year it was meant to cover.

Basis records for qualified property

Unadjusted basis right after acquisition and the placed-in-service date, kept for the property's recovery period.

An aggregation statement, filed every year you rely on it

The disclosure has to accompany the return the first year you aggregate, then repeat every year after. Aggregating differently the next year is what lets it be unwound.

A gross-receipts breakdown, if the SSTB line is close

Records showing what share of gross receipts came from a specified-service activity, so the de minimis test can be defended rather than asserted.

A reasonable-compensation analysis, independent of this deduction

Support for the salary figure that holds up on its own terms, not one derived backward from the QBI or wage-limit math.

Where it goes wrong

None of this is aggressive, and 199A is not a listed transaction. The exposure sits in execution: a classification pushed too far, a disclosure skipped, a number never tracked.

• Calling an SSTB something else. Reclassifying an accounting, consulting, or health practice as a non-SSTB above the range is a straightforward disallowance once examined; the de minimis test's all-or-nothing structure leaves no partial credit for being close.
• Aggregating without disclosing it. The disclosure is not paperwork attached to a decision made elsewhere. Skip it, or report inconsistently the next year, and the aggregation can be unwound.
• Missing negative QBI from another business. A loss in one trade or business offsets positive qualified business income from another, and an unused loss carries forward rather than disappearing, easy to net incorrectly across several K-1s.
• Treating a passive rental as a trade or business without support. A triple-net lease with no real activity behind it can fail the threshold question entirely, safe harbor or not.
• Forgetting the overall ceiling. A large capital-gain year shrinks taxable income minus net capital gain, capping the deduction below 20% of QBI in a business that changed nothing.

The S-corp salary trap

Lowering an S-corp salary to inflate qualified business income pulls two ways at once. Below the threshold, a lower salary raises QBI at no cost, since the wage limitation is not yet in play. Above it, the same move can backfire, since it also shrinks the 50%-of-wages ceiling the deduction is measured against. A separate risk sits underneath both: the IRS can recharacterize distributions as wages when compensation looks set to minimize payroll tax rather than reflect what the work was worth, a position the Eighth Circuit upheld in David E. Watson, P.C. v. United States. A recharacterization does not just create a payroll-tax bill; it changes the wage figure the QBI computation depended on, after the fact.

I set every S-corp salary on what the compensation is actually worth first, using a reasonable-compensation analysis independent of the tax return. Where the QBI math points toward a different number, I treat that as one more input to weigh, never as the reason for the number in the first place.

The self-rental SSTB taint

A second trap sits with a specified service business that rents its space from its own owner. Two rules stack here. A self-rental regulation treats a rental to a commonly controlled business as a trade or business for 199A purposes in its own right, which sounds like good news, since it opens the door to a QBI deduction on the rent. But a separate rule reaches back in: property or services provided to a specified service business under 50% or more common ownership are themselves treated as specified service. An accountant whose S-corp rents its office from a related real estate entity gets the full 20% on that rent below the threshold, a shrinking deduction through the phase-in range, and nothing above it, as if the rent were accounting income itself. Rent from an unrelated tenant in the same building is not affected.

A situation where this comes up

The version I see most often is an S-corp owner whose taxable income has grown past the threshold, running a non-service business, deciding what to pay themselves for the year ahead. That salary is not just a payroll and reasonable-compensation question anymore. It is also the number the wage limitation gets measured against, and moving it changes both sides of the QBI calculation at once, in opposite directions depending on where the business sits relative to the wage cap. Solving for the right number takes a model built on actual profit and payroll, not last year's percentage. The version that worries me is the same decision made backward: salary set to hit a QBI target first, defended as reasonable afterward. That ordering is visible from the outside, and it is exactly the fact pattern behind Watson.

The other place this comes up is the accountant, attorney, or other service professional who owns the building the practice runs out of, usually through a separate real estate entity, and has only ever looked at the rent deduction on the practice's side. The self-rental and SSTB-taint rules decide whether the owner gets any QBI benefit on the rental income arriving on the other side, turning entirely on income level and invisible unless someone looks before the return is filed.