The contractual framework governing the seller's post-close role is where deal-economics decisions made at LOI either translate into a clean exit or quietly trap the seller in obligations that never quite end. This Explainer covers the three legal vehicles, the tax trap that shapes allocation, the IRS recharacterization risk for high-dollar consulting, and the declining-intensity discipline that converts the TSA from open-ended commitment into structured transfer.
Consulting, employment, TSA.
Each of the three structures fits a different post-close situation. The choice is structural — and the wrong choice can't easily be undone after closing:
Advisory with autonomy.
- Independent contractor; no W-2 withholding.
- Best for sellers wanting maximum post-close autonomy.
- Defined deliverables, defined hours, defined end date.
- IRS scrutiny on misclassification — has to be a real consulting relationship.
Division leadership.
- Full employment with benefits, withholding, employer obligations.
- Best for sellers staying in operating roles (often 1–3 years).
- HR-compliance straightforward; tax implications clear.
- Buyer typically prefers; gives operational control of seller.
Time-bounded transfer.
- Knowledge-transfer specifically; not an ongoing role.
- Best for sellers wanting clean exit with structured handoff.
- Declining-intensity model over 3–12 months.
- Sunset clause is the discipline that prevents drift.
~17 point differential.
The tax trap is the structural negotiation tension that shapes how the seller's post-close compensation gets allocated. The numbers:
- Ordinary income: Top federal rate ~37% plus state. Compensation for services (consulting fees, W-2 salary) is ordinary income.
- Capital gains: Top federal rate ~20% plus state. Sale proceeds (purchase price for the business and goodwill) are capital gains.
- The differential: ~17 points. For every dollar that gets allocated to consulting/employment instead of purchase price, the seller pays ~$0.17 more in federal tax than necessary.
The negotiation tension: the buyer prefers higher consulting/employment allocation (immediate ordinary deductions) over higher purchase price allocation (amortized over years). The seller prefers the opposite. The math creates a zero-sum allocation negotiation that sits alongside the headline price negotiation.
Sellers who model after-tax proceeds before signing routinely identify allocation moves that materially shift the net wire amount. The advisory team's job at the APA stage is to surface these moves — not to default to whatever the buyer's first allocation proposes.
The economic reality test.
The IRS doesn't just accept whatever allocation the parties write down. The Economic Reality Test (memorialized in cases like Howard v. United States) requires that consulting fees actually correspond to consulting services rendered. The risk parameters:
- Consulting fees above $200K/year without documented hours and deliverables draw IRS scrutiny.
- Recharacterization to purchase price changes both parties' tax positions — sometimes punitively.
- The "no work" consulting agreement is the most-vulnerable structure — the buyer pays high consulting fees for what is functionally additional purchase price.
- The protective discipline: defined deliverables, hourly logs, actual work performed at reasonable rates. The consulting agreement has to be a real consulting agreement.
The Howard-style risk extends to personal-goodwill recharacterization in C-Corp transactions and to compensation-vs-goodwill allocations more broadly. Tax counsel at the APA stage is the safeguard.
From phase 1 to phase 3.
The structural pattern that separates a workable TSA from one that traps the seller indefinitely is the declining-intensity model. The seller's post-close involvement steps down through defined phases, ending firmly at a defined sunset:
| Phase | Window | Intensity |
|---|---|---|
| Phase 1 — Introduction | Months 1–3 | 15–20 hrs/month; named introductions, key carrier meetings, top-50 client warm handoffs |
| Phase 2 — Support | Months 4–6 | 10–15 hrs/month; questions and exceptions, no on-site daily presence |
| Phase 3 — Wind-down | Months 7–12 | 5–10 hrs/month; defined endpoint, sunset clause; relationship ends at Month 12 |
The protective provisions that hold the model together:
- Defined deliverables, not "available as needed." Specific named introductions, specific knowledge-transfer artifacts, specific milestones per phase.
- Hourly caps. Phase-by-phase ceilings on hours, with overflow-rate provisions for unanticipated additional work.
- Hard sunset clause. Firm end date. Any extension is a fresh negotiation, not a default continuation.
- Anti-interference protection. The buyer cannot demand seller involvement that exceeds the defined scope; specific consequences for violation.
- Stability Premium effect. Well-structured TSAs can drive 0.25x–0.5x valuation multiple expansion by de-risking client attrition during transition.
The Pillar — Post-Close Transition & Integration — covers the broader framework. The related Explainers: Staff & Human Capital, Protective & Ancillary Agreements for the contractual framework that underlies the TSA architecture.