Understanding the “Nexus” Concept: Why It Matters to You
In the simplest terms, nexus is the legal connection between your business and a taxing jurisdiction. Before a state or country can require you to collect and remit sales tax, you must have a “nexus” there.
Years ago, this usually meant you needed a physical office or a warehouse. Today, in our digital-first world, nexus is much broader. You can trigger tax obligations without ever setting foot in a specific region.
Ignoring these triggers isn’t an option. Failing to register and file can lead to back taxes, hefty interest, and penalties that can wipe out your profit margins. This is why staying ahead of the curve is essential for your global expansion.
The United States: Navigating the 50-State Maze
The USA is arguably the most complex landscape for sales tax. There is no national sales tax; instead, there are 45 states (plus D.C.) that each have their own rules. For a USA LLC or an international brand selling into the States, you need to watch out for two main types of nexus.
1. Physical Nexus
This is the traditional form. You have physical nexus if you have:
- An office or place of business.
- Employees or independent contractors working in the state.
- Inventory stored in a warehouse (including Amazon FBA centers).
- Ownership of real or personal property.
March 2026 trend: physical nexus is widening (warehouse storage + trade shows)
A lot of sellers still think “physical nexus” means “we opened an office.” In 2026, states are increasingly treating temporary or outsourced presence as enough.
Watch these two triggers closely:
- Warehouse / 3PL storage: If your stock sits in a third-party warehouse (or gets moved around a fulfilment network), many states treat that as immediate physical nexus—even if you never visit the facility.
- Trade shows and events: In several states, exhibiting at a trade show (even for a few days) can create nexus—especially if you take orders, generate leads, or have reps working the booth.
Action to take: Keep a simple “physical footprint” log:
- Where your inventory is stored (Amazon, 3PLs, and any overflow facilities).
- Where your team attends trade shows (state, dates, and whether you took orders).
Doing this makes nexus reviews fast and defensible if you ever get audited.
2. Economic Nexus
Following the landmark South Dakota v. Wayfair ruling, states can now tax you based solely on your economic activity. Even if you are based in London or Sydney, if you sell enough to customers in a specific US state, you have nexus.
Most states still talk in the language of $100,000 in gross sales or 200 separate transactions in a calendar year. But the 2026 reality is simpler (and a bit stricter): more states are ditching the 200-transaction test and going sales-only.
March 2026 changes you need to know:
- Alaska: the 200-transaction threshold has been removed. Nexus is now triggered by $100,000 in gross sales only (ignore transaction count).
- Illinois: the 200-transaction threshold is gone too. Nexus is now triggered by $100,000 in gross receipts only.
Action to take: Stop relying on “order count” as a comfort blanket. Pull rolling 12-month gross sales/gross receipts by state and review it quarterly. Doing this keeps you out of “surprise registration” territory and prevents back-tax exposure.
2026 trend to watch: more states taxing more “digital” and “service” revenue
Here’s the bigger shift we’re seeing in 2026: it’s not only about nexus thresholds. Some states are also trying to expand what’s taxable to plug budget gaps. For e-commerce and digital sellers, that can mean your “normally non-taxable” revenue suddenly becomes taxable in certain states.
- Maine (2026 Update): Maine has expanded its taxable digital services base for 2026 to include digital audio/visual services and streaming. If you sell streaming access, digital media subscriptions, or other digital products into Maine, re-check your taxability maps—not just nexus.
- States exploring base expansion: States like Georgia, Kansas, Pennsylvania, and Wyoming are exploring sales tax base expansion to cover budget gaps (often by reviewing exemptions and looking at more services/digital categories).
Action to take: Don’t just monitor your $ thresholds. Review your product/service taxability map once a quarter (especially if you sell digital or service-based products).
