Key Takeaway
Nexus case law has four major eras: (1) Quill (1992) established physical presence requirement; (2) Complete Auto (1977) established four-part Commerce Clause test; (3) PL 86-272 (1959) federal protection for solicitation-only TPP sellers; and (4) Wayfair (2018) overruled Quill, permitting economic nexus. The short version is that nexus law fundamentally shifted in 2018. In our experience, many businesses still operate under pre-Wayfair assumptions and are exposed to retroactive enforcement.1
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Four major nexus case law eras.
The Four Nexus Eras
PL 86-2721959Complete Auto1977Quill1992Wayfair2018
| Era | Holding2 |
|---|---|
| PL 86-272 (1959) | Federal TPP solicitation protection |
| Complete Auto (1977) | Four-part Commerce Clause test |
| Quill (1992) | Physical presence for sales tax |
| Wayfair (2018) | Economic nexus permitted |
Quick Reference
Jump to: PL 86-272, Complete Auto, Quill, or Wayfair.
1. PL 86-272 (1959)
Federal law protecting TPP sellers from state income tax for solicitation-only.
If this is you: TPP seller with in-state solicitation only. Orders approved and shipped from outside state. PL 86-272 protection. Modern MTC guidance narrowing internet activities.
PL 86-272 Strategy
- Identify protected activities.
- Structure operations to preserve protection.
- Evaluate MTC internet guidance.
- Review sales force activities.
- Document protection basis.
2. Complete Auto (1977)
Four-part Commerce Clause test for state tax constitutionality.
If this is you: Challenging state tax on Commerce Clause. Complete Auto test — substantial nexus, fair apportionment, no discrimination, fair relation to services. Still operative.
3. Quill (1992)
Physical presence requirement for sales tax (overruled 2018).
If this is you: Pre-Wayfair perspective. Quill required physical presence for sales tax. Out-of-state mail-order / internet protected. Overruled by Wayfair.
4. Wayfair (2018)
Economic nexus permitted; Quill overruled.
If this is you: Post-Wayfair reality. Economic nexus triggers sales tax obligations. Physical presence still triggers but not required. Every state now imposes economic nexus.
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Nexus Case Law Lookup
| Case / Authority | Significance |
|---|---|
| PL 86-272 (15 USC §§381-384) | Federal TPP protection |
| Complete Auto Transit v. Brady, 430 U.S. 274 (1977) | Commerce Clause test |
| Quill v. North Dakota, 504 U.S. 298 (1992) | Physical presence (overruled) |
| South Dakota v. Wayfair, 138 S. Ct. 2080 (2018) | Economic nexus |
| MTC statements | Internet activity guidance |
Case Law Statute
- Statute and case law operate together.
- Constitutional challenges rare.
- Factual applications more common.
Case Law Application
| Situation | Authority |
|---|---|
| Post-Wayfair economic nexus | Wayfair |
| TPP seller solicitation-only | PL 86-272 (narrowed) |
| Commerce Clause challenge | Complete Auto |
| Internet activity breaking PL 86-272 | MTC guidance |
Case Law in Audit
Examination
Nexus applied per case law.
Appeals
Case law arguments.
Court
Constitutional challenges rare.
First 48 Hours
- Identify operative case law.
- Apply to facts.
- Preserve positions.
- Engage counsel.
- Plan based on current law.
★Brotman Law applies nexus case law to multistate matters. Based in San Diego.
The ROI Question
Case law application determines nexus scope. Proper legal analysis prevents costly retroactive assessments.
Dealing with Multistate Tax Exposure?
Multistate obligations don’t announce themselves — most businesses accumulate sales tax, income tax, or payroll tax exposure in other states without realizing it until they’re contacted or audited. If you’re selling across state lines, have remote employees, or aren’t sure where your business has nexus, a brief review can identify where you have exposure and what to do about it.
Review My Multistate Exposure → Or call: (619) 378-3138
When to Engage
- Complex nexus analysis.
- PL 86-272 positions.
- Constitutional Commerce Clause.
- State audit defense.
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Guide Chapters
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Frequently Asked Questions
What is the history of nexus case law?
Four major eras — PL 86-272 (1959, TPP protection), Complete Auto (1977, Commerce Clause test), Quill (1992, physical presence, overruled), Wayfair (2018, economic nexus).
What did Wayfair change?
Overruled Quill’s physical presence requirement for sales tax. States can impose economic nexus based on thresholds. Fundamentally restructured state tax landscape.
Is PL 86-272 still good?
Yes but narrowed. MTC 2021 guidance treats many internet activities as breaking protection. Traditional TPP solicitation still protected in most states.
What is Complete Auto test?
Four-part Commerce Clause test — substantial nexus, fair apportionment, no discrimination, fair relation to services. State taxes must satisfy all four. Still operative.
What activities break PL 86-272 now?
Per MTC 2021 — post-sale customer support, cookies, chat features, online job applications, assisting with returns. Not yet adopted in all states but trending.
Does Wayfair apply to income tax?
States extended economic nexus to income tax. CA Factor Presence test. Many states have similar. PL 86-272 still protects TPP sellers from income tax if applicable.
What are Wayfair thresholds?
SD: $100K or 200 transactions. Adopted widely with variations. CA: $500K sales. Each state sets own.
Is physical presence irrelevant?
No. Still creates nexus. But not required. Economic or physical either suffices.
Can Congress override Wayfair?
Theoretically. Marketplace Fairness Act and similar proposed. Nothing enacted. Wayfair operative.
What about digital services?
Many states tax. Economic nexus applies. Not subject to PL 86-272 (which covers TPP only).
Can I challenge nexus?
Yes via Commerce Clause or Due Process. Rare successful challenges post-Wayfair. Case-specific facts matter.
What is substantial nexus?
Connection supporting state taxation. Post-Wayfair, economic activity sufficient. Physical presence also creates.
How do new cases evolve?
Interpretive cases continue. Internet activity and PL 86-272 scope developing. State court precedents vary. Monitor ongoing.
Next Steps
Nexus case law question? 15-min consultation free.
- Major cases: Quill v. North Dakota, 504 U.S. 298 (1992); South Dakota v. Wayfair, 138 S. Ct. 2080 (2018).
- Complete Auto Transit v. Brady, 430 U.S. 274 (1977); PL 86-272, 15 USC §§381-384.
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