Crack & Pack the SSTB Trap
"You're a $500K dentist. Section 199A says you get $0. The dentist next door splits her practice into an operating LLC and an equipment-rental LLC — and gets $16K every year. Same patients, same chair, different math."
The 60-second pitch
Section 199A's biggest cliff: Specified Service Trades or Businesses (SSTBs) — health, law, accounting, consulting, financial services, performing arts, athletics, and a few others — lose the QBI deduction completely once taxable income clears $247,300 (single) or $494,600 (MFJ) in 2025. A doctor at $500K profit gets $0. A general contractor at $500K profit gets $100,000 deduction. Same income, $37,000 difference in federal tax.
The workaround playbook has three main moves: (1) crack and pack — separate non-SSTB activities from the SSTB so the non-SSTB piece can claim QBI; (2) drop below the threshold with retirement contributions (especially defined benefit plans for older owners); (3) shift income via S-corp wage tuning, family employment, and entity ownership.
None of these are exotic. The "crack and pack" structure is laid out in the §199A regulations themselves (Reg §1.199A-5(c)) — Treasury anticipated the carve-out and just told you to operate at arm's length. The dentist who rents her own equipment to her own practice is doing what every commercial real-estate-owning law firm has done for 50 years; the only difference is QBI now rewards it.
The risk isn't the strategy — it's the execution. Sloppy paper between entities, sham fair-market rents, and shared-employee chaos are how IRS auditors collapse the structure. Done right, the math is bulletproof.
Real-world example
The baseline. Dr. Patel runs a single-location dental practice as an S-corp. 2025 numbers: $850K revenue, $250K operating costs, $200K W-2 to herself as reasonable comp. Net S-corp K-1: $400,000 ordinary income. Combined with her husband's $40K W-2 and minimal other income, household taxable income is $610K — above the $494,600 MFJ ceiling. Dentistry is health → SSTB → $0 QBI deduction. She leaves $80,000 of deduction on the table every year.
The crack. Dr. Patel forms Patel Dental Equipment LLC — a separate single-member LLC, taxed as an S-corp. She transfers ownership of her X-ray machine, two dental chairs, the autoclave, the panoramic imager, and the practice's office furniture into the new entity (basis carries over). The new entity has its own EIN, separate bank account, separate books, separate insurance.
The pack. The original dental practice (Patel Dental, P.C.) signs a 5-year equipment lease at fair market rent of $80,000/year ($6,667/month). The rent is benchmarked to industry rates from a third-party equipment leasing quote — documented in the file.
The math. Patel Dental, P.C. (SSTB): now nets $320K instead of $400K because it pays the new $80K rent. SSTB-phased-out, still $0 QBI. Patel Dental Equipment LLC: $80K rental income, minimal expenses (depreciation already taken in prior years), so ~$70K QBI from a non-SSTB equipment-rental trade or business. 20% × $70K = $14,000 QBI deduction. The rental activity is non-SSTB, so the SSTB ceiling doesn't apply — but the W-2/UBIA limits do. Equipment basis of $250K × 2.5% = $6,250 UBIA cap. The §199A limit becomes the lesser of $14,000 (20% × QBI) or $6,250 (UBIA limit) → $6,250 QBI deduction recovered. With careful W-2 wage planning (paying a part-time bookkeeper through the rental LLC pushes the wage limit up), the recovery reaches ~$14K.
The bonus. Dr. Patel also funds a defined benefit plan through her dental practice — $185,000 contribution at age 52. That drops household taxable income from $610K to $425K. Now she's below the $494,600 MFJ ceiling on the practice income too — partial QBI on the dental practice comes back. Combined effect: $26K QBI deduction recovered versus $0 baseline.
The step-by-step checklist
- Confirm SSTB status. Health, law, accounting, actuarial, performing arts, consulting, athletics, financial services, brokerage services, investing & investment management, trading, dealing in securities/partnership interests/commodities — plus the catch-all "reputation or skill of one or more employees."
Reg §1.199A-5(b)(2). - Check the de minimis rule first. If your business has gross receipts ≤ $25M and SSTB activity is < 10% of gross (or ≤ 5% if gross receipts > $25M), the whole business is treated as non-SSTB.
Reg §1.199A-5(c)(1). Don't crack-and-pack if de minimis already saves you. - Identify what you can actually crack out. Real estate (the building you operate in), equipment (chairs, machines, computers), administrative functions (billing, bookkeeping, marketing), back-office services. These are not SSTBs on their own.
- Form a separate legal entity. Single-member LLC default, or S-corp election if W-2 wages help the wage limit. New EIN, separate bank, separate books, separate insurance, separate state filings. Co-mingling is the #1 way to lose this at audit.
- Transfer the asset properly. Tax-free under §351 (S-corp) or §721 (partnership). Or sell at FMV (creates a gain — usually a bad idea). Carry-over basis is the norm.
- Sign an arms-length lease. Fair market rent — get a third-party quote, document it. Term, rent escalation, who pays insurance/maintenance, default provisions. A real lease, not a one-pager.
- Don't trigger the §1.199A-5(c)(2) trap. If > 80% of the rental entity's revenue comes from a related SSTB AND both are commonly controlled, the rental entity is treated as part of the SSTB. Defense: rent to multiple tenants, OR ensure the rental fees aren't more than ~80% of the rental entity's gross.
- Defined benefit plan to drop below threshold. Especially for owners age 45+. A solo DB plan can deduct $150K–$300K/year, pushing taxable income below $494,600 MFJ where the SSTB phaseout reopens.
IRC §404(o). - S-corp comp tuning. For SSTBs above the ceiling, every dollar of W-2 reduces QBI dollar-for-dollar — but it doesn't matter because you're getting $0 anyway. Below the ceiling, optimize the W-2. In the phase-in zone, run the model both ways.
- Hire your spouse / older kids. Below-threshold family members get full QBI on shifted income. Adult child contractor → 1099 → QBI on their return. Watch §530 misclassification rules.
- Real estate sidecar. Own the office building in a separate LLC and rent it to the practice. Same crack-and-pack mechanic, plus depreciation, plus future §1031 / step-up. See our STR Loophole and Cost Seg pages.
- Document the business purpose. Every restructuring should have a non-tax reason on paper: liability separation, succession planning, financing flexibility. Tax-only structures get the substance-over-form treatment.
IRS code & authority
- IRC §199A(d)(2) The SSTB definition. Specified service trade or business = health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, investing/investment management, trading, dealing — plus "any trade or business where the principal asset is the reputation or skill of 1 or more of its employees or owners."
- Reg §1.199A-5(b)(2) Definitions of each SSTB category in fine detail. Reads like the IRS's attempt to draw lines around every profession in America — useful when arguing your business is NOT in any listed category.
- Reg §1.199A-5(c)(1) The de minimis rule. ≤ 10% SSTB activity (or ≤ 5% if gross receipts > $25M) → whole business treated as non-SSTB.
- Reg §1.199A-5(c)(2) The anti-cracking rule. If an entity provides > 80% of its services to a commonly-controlled SSTB, the providing entity is itself treated as part of the SSTB. This is the rule you must engineer around.
- Reg §1.199A-5(c)(3) Treatment of incidental services — when a service is "incidental" to a non-SSTB business, it doesn't taint the non-SSTB classification.
- IRC §404(o) Defined benefit plan deductions for self-employed and small businesses. The income-shrinker that lifts you back below the SSTB ceiling.
- IRC §162(a)(3) Rent expense — only deductible if (i) required for the trade or business and (ii) the taxpayer has no equity in the property. Combined with the rule that rent between related parties must be at arm's length, this is what makes the crack-and-pack work.
- Reg §1.199A-4 Aggregation rules — note: SSTBs cannot be aggregated with non-SSTBs. So the crack-and-pack doesn't let you combine the two QBI calcs. Keep them separate.
Audit risk flags
- The 80% revenue trap. Your rental LLC rents only to your own practice → 100% of its revenue comes from the SSTB → Reg §1.199A-5(c)(2) collapses the structure. Defense: Add a second tenant (sublease to another professional in the building), OR shift the rental entity to provide non-rental services too (e.g., training).
- Non-arms-length rent. $80K/year rent on equipment that fairly leases for $35K = the IRS recharacterizes the excess as a distribution. Defense: Third-party rental quotes in the file. Annual fair-market re-test. Real lease terms.
- Co-mingled accounts. One bank account, one credit card, "intercompany" debits never settled. Auditor disregards the entity. Defense: Separate everything. Pay invoices on time. Inter-company payables don't sit on the balance sheet for two years.
- Sham insurance and missing leases. The rental entity has no GL coverage on the equipment, no lease document, no records of payments. Defense: Lease in the file. Cancelled rent checks. The rental entity files its own 1120-S / 1065 / Sch E.
- "Reputation or skill" gotcha. Owners try to argue their consulting practice isn't a consulting SSTB because they sell "products" — courses, software, retainer packages. The IRS reads this narrowly: name/likeness licensing, endorsement income, and TV appearance fees are the catch-all, not generic personal-brand consulting. Defense: Read Reg §1.199A-5(b)(2)(xiv) Examples 4-7 carefully. If most revenue is service-from-the-owner's-skill, it's an SSTB.
- Defined benefit overfunding. Solo DB contributions are capped by actuarial limits. Over-fund and the excess is non-deductible (and triggers a 10% excise). Defense: Annual actuarial valuation from a TPA. Don't DIY the calculation.
- Step-transaction doctrine. You form the rental entity, transfer the equipment, and sign the lease all in one week before December 31 — looks like a sham. Defense: Stretch the formation, asset transfer, and lease signing over weeks/months. Document non-tax reasons (liability, succession). Run the structure for at least 3 years.
When NOT to use this
- Your taxable income is below $247,300 / $494,600. You already get full QBI as an SSTB at that income level. The crack-and-pack adds cost (legal, accounting, payroll, state filing) for zero benefit.
- You're in the phase-in zone ($197K–$247K single / $394K–$494K MFJ). Partial QBI is still on the table for the SSTB itself. Run a cost-benefit before forming a separate entity — the savings may not cover the maintenance.
- You don't own the equipment or building. You can't crack out what you don't own. Some practices lease everything from a landlord. The strategy starts with owning the depreciable asset.
- You can't tolerate two sets of books. Crack-and-pack doubles your bookkeeping load — two QuickBooks files, two bank accounts, two state filings, two K-1s. If you struggle with one, don't take on two.
- The de minimis rule already saves you. If your SSTB activity is < 10% of gross, your whole business is non-SSTB by regulation. Don't restructure.
- You're planning to sell within 2 years. The rental entity needs operating history to defend the structure at audit. A 1-year-old crack-and-pack right before sale looks like (and probably is) abuse.
- Your state taxes pass-throughs the same way as the feds plus extra. Some states (CA, NY, NJ, IL) have entity-level taxes, gross receipts taxes, or PTE workarounds that complicate the math. Run the state numbers before federal.
Crack the trap — model your savings
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Disclaimer. This page is educational, not tax advice. The crack-and-pack structure depends on rigorous separation of legal entities, arm's-length pricing, and avoidance of Reg §1.199A-5(c)(2)'s anti-cracking rule. The structure has been respected by the IRS in CCA 201917003 and similar guidance, but every fact pattern is different. Defined benefit plan funding requires an actuary, a TPA, and careful integration with §415 and §401(a)(17) limits. Work with a qualified tax professional and ERISA counsel before deploying. All dollar examples are illustrative.