If you sell products or services online and ship to customers in states where you don’t have a physical presence, you have nexus obligations you may not have fully mapped. This isn’t a fringe issue for large retailers — it applies to small e-commerce businesses, independent consultants, software companies, and anyone else generating revenue across state lines. The South Dakota v. Wayfair decision in 2018 fundamentally changed the nexus landscape, and while it’s been several years since that ruling, the compliance picture for remote sellers is still more complicated than most businesses appreciate. Economic nexus thresholds, varying state rules, and a calendar full of state-specific tax events make this an area that requires active management rather than a one-time setup.
What Nexus Actually Means for a Remote Seller
Nexus is the legal connection between a business and a taxing jurisdiction that creates an obligation to collect and remit sales tax. Before Wayfair, nexus was primarily physical — a store, a warehouse, an employee, or an agent in a state. Remote sellers without a physical footprint could sell into any state without collecting sales tax on those transactions.
Economic nexus changed that. Now, most states impose sales tax collection obligations on out-of-state sellers once they cross a revenue or transaction threshold — typically $100,000 in sales or 200 transactions in a calendar year, though the specifics vary by state. Cross that threshold and you’re required to register, collect, and file in that state, regardless of whether you’ve ever set foot there. For a growing e-commerce business, this means nexus can appear in multiple new states within a single fiscal year simply because the business is performing well.
The practical implication is that nexus isn’t a static status. It needs to be monitored continuously as sales volumes shift across markets.
The Nexus Triggers Remote Sellers Most Commonly Miss
Economic nexus thresholds get most of the attention, but they’re not the only way a remote seller can establish nexus in a state. Several other triggers catch businesses off guard:
- Inventory storage — using a third-party fulfillment center or marketplace warehouse in a state typically creates nexus, even without any direct employee presence
- Affiliate relationships — referral arrangements with in-state partners can establish nexus in some states under affiliate nexus rules
- Trade shows and temporary events — attending an in-state event and making sales there, even briefly, establishes nexus in jurisdictions with click-through or event-based rules
- Remote employees — a single employee working from home in another state can create nexus for the entire business in that state
- Drop shipping arrangements — where goods ship from a third-party supplier located in the buyer’s state, potentially creating nexus exposure for the seller
Each of these applies unevenly across states, which is part of what makes nexus management complex. A trigger that creates nexus in California might not apply the same way in Texas.
How Sales Tax Holidays Add Another Layer of Complexity
Once a remote seller has established nexus in a state and is actively collecting sales tax, the compliance work doesn’t stop at knowing the right rate. States regularly modify tax obligations through temporary exemptions, rate changes, and sales tax holidays — designated periods when specific categories of goods are exempt from state sales tax. These holidays are popular in states like Florida, Texas, Tennessee, and others, typically timed around back-to-school shopping seasons, emergency preparedness periods, or energy-efficient appliance purchases.
For remote sellers, these holidays create a compliance wrinkle. If you’re selling qualifying products to customers in a participating state during a holiday window, you’re required to apply the exemption correctly — which means your tax calculation engine needs to know about the holiday, the eligible product categories, and the applicable date range. Missing a holiday and overcharging customers creates refund and relationship problems. Misapplying a holiday to non-qualifying items creates under-collection exposure. A current resource like sales tax holidays 2025 can help sellers track which states are running holidays, when, and what qualifies — information that needs to be reflected in your system configuration before the holiday begins, not after.
Building a Nexus Management Process That Keeps Pace With Your Growth
The businesses that handle nexus compliance well treat it as an ongoing operational function rather than a one-time registration exercise. That means monitoring sales by state against economic nexus thresholds on a regular cadence — monthly for fast-growing businesses, quarterly at minimum. It means reviewing nexus triggers when business arrangements change: new fulfillment partners, new affiliate relationships, new employees in different states. And it means keeping tax calculation systems updated with rule changes, rate changes, and temporary modifications like sales tax holidays so that what customers are charged reflects current law.
Nexus exposure doesn’t accumulate all at once. It builds quietly as a business grows into new markets — and by the time it surfaces in an audit or a state registration notice, the liability can cover multiple years. Building the monitoring infrastructure now costs far less than reconstructing it under pressure.
