🧾 Sales Tax Nexus 101: Understanding Economic & Physical Nexus
Subheadline
Know when you must register, collect, and file — across physical and economic triggers — with real ecommerce examples.
1) What is “nexus”?
Sales tax nexus is your legal connection to a state that requires you to register, collect tax on taxable sales, and file returns. Nexus can be created by physical presence or economic activity (or both).
2) Physical nexus (the traditional trigger)
You create nexus when you have a tangible footprint in a state, including
Inventory/FBA: Amazon moving your goods into a Texas or New Jersey warehouse = instant nexus.
Employees/contractors: A remote customer-service rep working from Colorado.
Property/office/3PL: Leased space or stored goods at a third-party logistics provider.
Temporary activity: Selling at an Illinois trade show can create short-term nexus.
Rule of thumb: Once physical nexus exists, register and collect immediately — even if sales are low.
3) Economic nexus (the modern rule)
After South Dakota v. Wayfair (2018), states can require remote sellers to collect based on sales/transaction thresholds.
Typical models:
$100,000 in sales or 200 transactions (e.g., SD model).
$500,000 (no transaction count) in states like CA and TX; NY uses $500,000 + 100 transactions.
Cross a state’s threshold → register, collect, and file the next period.
4) Practical ecommerce examples
FBA inventory: UK brand ships to Amazon; stock is placed in CA/TX/NJ. Physical nexus in each storage state, even before hitting economic thresholds.
Remote team: A Florida seller’s part-time designer works from Georgia; that presence triggers GA registration.
Threshold only: A South African Shopify store sells $120,000 to New York with no presence → economic nexus; must register and collect NY tax.
5) What to do once nexus exists
Map where you have physical locations, staff, and inventory.
Monitor state-by-state sales monthly.
Register before you collect (it’s illegal to collect without a permit).
Configure marketplace + store settings to collect the right rate.
File all required returns (including “zero returns”) on time.
6) Risks of ignoring nexus
Expect retroactive assessments, ~10–15% penalties, interest, and potential marketplace suspension until filings are current. Fixing back periods is slower and costlier than staying compliant.
Stay compliant the smart way. We map your nexus (physical + economic), handle registrations, and file accurately across all states.
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Meta Title (≤60): Sales Tax Nexus 101 | Economic & Physical Nexus Explained
Meta Description (≤160): Learn how physical and economic nexus (FBA, remote staff, thresholds) create U.S. sales-tax duties for ecommerce sellers. Stay compliant with expert help.
Primary Keyword: sales tax nexus
Secondary: physical nexus, economic nexus, FBA inventory nexus, remote employee nexus, Wayfair decision
Schema: Article + (optional) FAQ; Author: Sales Tax Compliance USA Team
