PASS-THROUGH INCOME SECTION 199A NET EFFECT (S-Corp, LLC, Sole) DEDUCTION ───────────────── ───────────────────── ═══════════════════ • 20% OFF the top • Schedule C income ──╲ ╱── • Max rate: 29.6% • S-Corp K-1 income ───╲┌──────────┐╱─── instead of 37% • Partnership K-1 ────╳│ 199A QBI │╳──── • Up to $364K (MFJ) • Rental income (?) ───╱└──────────┘╲─── no limitations • NOT W-2 wages ╱ ╲ • Above: W-2/UBIA test QUALIFIES: LIMITS: DOESN'T QUALIFY: ───────────────────── ═══════════════════ ───────────────── • Most businesses • SSTB phase-out • Specified Service: • Below threshold: above $364K (MFJ) Law, Medicine, full 20%, no limits • W-2 wages test Consulting, Finance • Rental income above threshold • (But OK if under (safe harbor) • UBIA (property) test $364K!) ──────────────────────────────────────────────── THE MATH: QBI = $300K pass-through income 199A deduction = $300K × 20% = $60,000 FREE deduction Tax savings at 32% bracket: $60K × 32% = $19,200/year
FADE IN: A modern coworking space. RASHID HASSAN (40s, owns three businesses, always in a hurry) drops into a chair across from his tax strategist CHARLOTTE PRICE (50s, former IRS agent turned advisor, knows where the bodies are buried). RASHID Charlotte, I made $300K from my businesses last year. My tax bill was brutal. Tell me there's something I'm missing. CHARLOTTE When you say $300K from your businesses — is that W-2 wages or pass-through income? RASHID Pass-through. I own an S-Corp marketing agency, a partnership in a real estate venture, and a sole proprietorship doing consulting on the side. CHARLOTTE (grinning) Then you're missing a $60,000 deduction. And it's literally free. RASHID Sixty thousand? How? CHARLOTTE Section 199A. The Qualified Business Income deduction. Congress gave it to pass-through owners in 2017. It's a 20% deduction on your qualified business income. You don't have to do ANYTHING extra to claim it — you just have to know it exists.
CHARLOTTE Here's how it works. If you earn income through a pass-through entity — that's a sole proprietorship, partnership, LLC, or S-Corp — you get to deduct 20% of that income. It comes off the top, before you calculate your tax. RASHID All of my businesses count? CHARLOTTE Your marketing agency S-Corp: yes. Your real estate partnership: yes. Your consulting sole proprietorship... maybe. And that "maybe" is where the strategy lives. She pulls out a highlighter. CHARLOTTE (CONT'D) There are two categories. "Qualified trades or businesses" — basically anything that makes money — and "Specified Service Trades or Businesses" — or SSTBs. SSTBs include law, accounting, medicine, consulting, financial services, and performing arts. RASHID Consulting is specified? That's my sole proprietorship. CHARLOTTE Right. BUT — and this is critical — if your total taxable income is under $364,200 for married filing jointly ($182,100 single), the SSTB limitation doesn't apply. You get the full 20% on everything, including consulting. RASHID I'm filing jointly. Our total taxable income is about $340K. CHARLOTTE (leaning back) Then all three businesses qualify. Full 20%. No limitations. $60,000 deduction.
Charlotte scribbles on a napkin. CHARLOTTE Let's break it down by business. Marketing agency (S-Corp K-1): $180,000 QBI Real estate partnership (K-1): $70,000 QBI Consulting sole prop (Schedule C): $50,000 QBI Total QBI: $300,000 Section 199A deduction: $300,000 × 20% = $60,000 RASHID And that just... disappears from my taxable income? CHARLOTTE It's a deduction from your taxable income, not from your AGI. Think of it like a second standard deduction — but one that only pass-through business owners get. W-2 employees don't get this. Only business owners. She calculates the tax savings: CHARLOTTE (CONT'D) Your marginal rate without the deduction: 32%. With the $60,000 QBI deduction: $60,000 × 32% = $19,200 in tax savings. Every year. For doing nothing extra. RASHID And I haven't been claiming this? CHARLOTTE Your tax software might be calculating it automatically — check Line 13 of your 1040 from last year. If your prior preparer was competent, it's there. If not... we might need to amend.
RASHID What if my income goes up next year? What happens above $364K? CHARLOTTE Above $364,200 (MFJ), two things change. First, if any of your businesses are SSTBs — like your consulting — the deduction for that business phases out between $364K and $464K. Above $464K, SSTBs get zero deduction. RASHID So if I earn more, my consulting loses the deduction? CHARLOTTE Exactly. But your non-SSTB businesses — the marketing agency and real estate — still qualify. They just face a different limitation: the W-2 wages and UBIA test. She writes the formula: CHARLOTTE (CONT'D) Above threshold, the deduction for non-SSTB businesses is the LESSER of: A) 20% of QBI, OR B) The GREATER of: — 50% of W-2 wages paid by the business, OR — 25% of W-2 wages PLUS 2.5% of UBIA (Unadjusted Basis of Qualified Property) RASHID That's... complicated. CHARLOTTE It is. But it means: if your business pays significant wages or owns significant property, you're fine. Your marketing agency pays employees $400K in total wages. Fifty percent of that is $200K — way more than 20% of your $180K income. You'd still get the full deduction even above the threshold. RASHID So the employees I'm already paying protect my deduction? CHARLOTTE The W-2 wages serve double duty: running your business AND securing your 199A deduction. Beautiful, isn't it?
RASHID What about the rental income from the partnership? You said real estate qualifies. CHARLOTTE It does, with a caveat. The IRS issued a safe harbor — Revenue Procedure 2019-38 — that says rental real estate activities qualify for 199A if you spend at least 250 hours per year on rental activities AND keep contemporaneous records. RASHID We have a property manager. CHARLOTTE The hours can include time spent by your employees, agents, or contractors. So the property manager's time counts toward your 250 hours. As long as the total — you plus your team — exceeds 250 hours per year and you maintain a log, your rental income qualifies. She pauses. CHARLOTTE (CONT'D) Even without the safe harbor, many tax practitioners take the position that rental income qualifies as QBI under general 199A rules — it's income from a trade or business. The safe harbor just gives you extra protection in an audit. RASHID And triple-net lease income? CHARLOTTE Riskier. If you're truly passive — just collecting rent with zero management involvement — it's harder to call it a "trade or business." But active rental operations with maintenance, tenant screening, and improvement projects? Solidly qualifies.
CHARLOTTE Now here's where the real strategy lives. Your taxable income is $340K this year — under the $364K threshold. That means everything qualifies with no limitations. But what if next year your income jumps to $400K? RASHID My consulting loses its deduction. CHARLOTTE Right. So what do you do? You manage your taxable income to stay below the threshold. Legally. She lists options: CHARLOTTE (CONT'D) Option one: maximize retirement contributions. Your S-Corp Solo 401(k) employer contribution can be up to 25% of your salary. If you increase your salary or contributions, you reduce taxable income. Option two: time deductions. If you're close to the threshold, accelerate business expenses into this year — buy equipment, prepay insurance, front-load marketing spend. Option three: the charitable bunching strategy we discussed last week. A large Donor-Advised Fund contribution in a high-income year drops your taxable income below the threshold. RASHID So the $60K DAF contribution we talked about... CHARLOTTE Would drop your taxable income from $400K to $340K. Below the threshold. Full 199A deduction restored. The DAF contribution saves you tax directly AND unlocks additional savings through 199A. It's a multiplier effect. RASHID (laughing) These strategies all work together. CHARLOTTE That's the game. No single strategy exists in isolation. They're an ecosystem.
CHARLOTTE One more tactical move. Section 199A allows you to aggregate multiple businesses for the W-2 wages and UBIA tests. If one business has lots of wages and another doesn't, combining them can help. RASHID Show me. CHARLOTTE Say your marketing agency has $400K in W-2 wages but your real estate partnership has zero. Individually, the real estate partnership would fail the W-2 wages test above the threshold. But if you aggregate them — and they share centralized management, which yours do — the combined W-2 wages cover both businesses. She draws a bracket combining the two. CHARLOTTE (CONT'D) Conversely, sometimes SEPARATING businesses helps. If a non-SSTB business has a consulting arm inside it, splitting the consulting into its own entity might let the main business retain full 199A qualification. RASHID So the structure of your entities can change your deduction? CHARLOTTE Dramatically. This is why entity structure review should happen EVERY year, not just at formation. A decision you made five years ago might be costing you $10,000+ annually in lost 199A benefits. RASHID Let's review all of mine. CHARLOTTE Already on the calendar for November. Before year-end so we can restructure if needed.
RASHID How long does this deduction last? CHARLOTTE Here's the urgent part. Section 199A was enacted as part of the Tax Cuts and Jobs Act of 2017. It's scheduled to SUNSET on December 31, 2025. After that, it disappears unless Congress extends it. RASHID (alarmed) That's next year! CHARLOTTE It's been a political football. Both parties have proposed extensions or modifications. It's likely to be extended in some form because it affects 25+ million small business owners — and those are voters. But "likely" isn't "certain." She leans forward. CHARLOTTE (CONT'D) This means two things. One: claim every dollar of 199A deduction you're entitled to between now and the sunset. Don't leave money on the table while the law exists. Two: if you have the ability to accelerate income into the pre-sunset years — say, getting a client to pay early — it might be worth doing. RASHID And if it doesn't get extended? CHARLOTTE Your effective rate on pass-through income goes from 29.6% back to 37%. That's a 7.4 percentage point increase. On $300K of income: $22,200 more in tax per year. The deduction is worth fighting for — and worth planning around either outcome.
CHARLOTTE Let me give you the top mistakes I see with 199A. One: not claiming it at all. I've reviewed returns from other preparers where the taxpayer clearly qualified and it wasn't on the return. Tens of thousands in lost deductions. Two: not tracking W-2 wages by business. When you're above the threshold, you need precise W-2 wage data for each separate qualified business. If your bookkeeping lumps everything together, you can't compute the limitation properly. Three: not considering the SSTB rules before starting a new business. If you're above the income threshold and start a consulting company — that's an SSTB with zero 199A benefit. But if you structure the same services as a staffing company that provides contractors... it might not be specified service. RASHID Wait — the same work can qualify or not depending on how you structure it? CHARLOTTE The regulations are specific. "Consulting" is defined narrowly as providing advice and counsel. If your business provides services beyond advice — implementation, staffing, deliverables — it may not meet the SSTB definition. The facts and circumstances matter enormously. RASHID So how you describe your business in your formation documents... CHARLOTTE ...can affect whether you get a 20% deduction. Words matter in tax law. We want your businesses described accurately — but also precisely enough that they don't accidentally fall into an SSTB category.
Rashid drains his coffee and shakes his head. RASHID I've been running businesses for fifteen years. Nobody explained 199A to me like this. CHARLOTTE It's new — only since 2018. And it's complex enough that most generalist CPAs apply it mechanically without optimizing. They calculate what the software spits out and move on. The strategy — managing income thresholds, aggregating businesses, structuring around SSTB rules — that's where the real value lives. She packs up her laptop. CHARLOTTE (CONT'D) IRC Section 199A — Qualified Business Income Deduction. Twenty percent off the top for pass-through business owners. It's the single biggest tax incentive for small business since the S-Corp election. And it's sitting there, in the code, for anyone structured to claim it. RASHID The consulting entity — should we restructure before year-end? CHARLOTTE If your income's going above $364K, yes. We reclassify the entity description, separate the advisory services from the implementation services, and ensure the non-SSTB portion retains its full 199A benefit. She stands. CHARLOTTE (CONT'D) November. That's our window. Before the calendar flips and the deduction for this year is locked in. Rashid nods, already texting his business partner about the restructuring. Charlotte walks out, phone already ringing with the next client — another business owner who doesn't know they're missing $60,000. FADE OUT. — END —