States Where Economic Nexus Kicks In Below $100K: $10K, $50K, and Trailing-12 Traps

The $100K Floor Is Not Universal

The 2018 South Dakota v. Wayfair decision established that states can require remote sellers to collect sales tax based on economic activity alone — no physical presence required. South Dakota's law used a $100,000 OR 200 transactions threshold, and the Supreme Court cited those figures approvingly. Most states followed suit, and $100K became the perceived "safe harbor."

But Wayfair never set a constitutional floor. The Court did not say that $100K was the minimum threshold a state could use. It simply said South Dakota's numbers were reasonable. States are free to set lower thresholds — and several have done exactly that, either through low dollar figures, aggressive transaction counts, or measurement windows that catch sellers before they realize they have crossed the line.

For sellers earning between $10,000 and $99,000 in out-of-state revenue, the compliance landscape is more complex than it appears. Understanding which states deviate from the $100K standard is the first step toward avoiding penalties.

Complete List of Sub-$100K Threshold States

The following table includes every state where economic nexus can be triggered at a revenue level below $100,000 — whether through a lower dollar threshold, an aggressive transaction count, or both. The "effective floor" column shows the practical minimum at which a seller could owe registration.

The key insight: while the dollar threshold in most of these states is technically $100,000, the OR connector with 200 transactions means the effective floor is whatever revenue a seller generates across 200 orders. For a seller with a $20 average order value, that is just $4,000. For the full list of thresholds, see our state-by-state threshold chart.

Kansas's $0 Threshold: What Happened

Kansas stands out as the most aggressive post-Wayfair example. Rather than passing a new economic nexus law with a defined threshold, the Kansas Department of Revenue took the position that its existing retailers' sales tax already applied to all remote sellers — regardless of sales volume. Effective October 1, 2019, any seller making even a single sale into Kansas was technically required to collect and remit sales tax.

This $0 threshold drew immediate criticism from tax practitioners and industry groups who argued it was constitutionally suspect under the Wayfair framework. The Court in Wayfair had emphasized that South Dakota's law was reasonable in part because it included a meaningful threshold. A $0 floor arguably failed that test.

Kansas eventually adopted a formal $100,000 economic nexus threshold effective July 1, 2021. However, the October 2019 to June 2021 gap period remains a compliance gray area. Sellers who did not collect during that window could theoretically face audit assessments, though enforcement has been limited. If you sold into Kansas during that period without collecting, consider consulting a tax advisor about voluntary disclosure.

How Trailing-12-Month Windows Create Retroactive Exposure

Some states do not use calendar-year measurement periods. Instead, they evaluate nexus on a trailing (rolling) 12-month basis — meaning the state looks back at the most recent 12 consecutive months of sales at any point in time. The window shifts forward by one day, every day.

This creates a particularly dangerous scenario for fast-growing brands:

The trailing-12-month window is especially treacherous because it does not reset on January 1. There is no clean "start fresh" date. A seller who was safely below the threshold in March could cross it in April simply because a weak month from the prior year rolled off the back of the window and was replaced by a stronger recent month.

States that use a rolling or trailing 12-month measurement period include Texas ($500K threshold) and Washington ($100K threshold), among others. For states with a $100K threshold and a trailing window, the combination is particularly punishing for brands in the $60K–$99K annual revenue range who experience any seasonality at all.

If you sell into trailing-12-month states, monthly monitoring is not optional — it is the only way to catch threshold crossings before they become compliance violations. Automated sales tax tools that track rolling totals are the most reliable solution.

Danger Tier: States That Hit Sellers at $50K–$99K

If your total online revenue is between $50,000 and $99,000, you might assume you are safely below every state's economic nexus threshold. That assumption is wrong. The following table shows how sellers in this revenue range can trigger nexus through transaction counts, even when their dollar totals are well below $100K.

The pattern is clear: low average order values combined with high transaction volumes are what trigger nexus below $100K. Sellers of inexpensive goods — stickers, digital files, craft supplies, low-cost subscriptions — are the most exposed. High-ticket sellers are generally safe from the transaction prong, but should still monitor dollar thresholds in trailing-12-month states.

Why a $50K Startup Can Already Owe in Multiple States

Consider a first-year e-commerce brand that sells custom phone cases at $15 each. The business does $50,000 in total revenue — roughly 3,333 orders. Across all 50 states, that averages about 67 orders per state. But sales are never evenly distributed.

If the brand ships heavily to population centers, it is entirely plausible that states like Georgia, North Carolina, Indiana, and Ohio each receive 200+ orders. Every one of those states uses an OR connector — meaning the 200-transaction prong alone triggers nexus, regardless of revenue.

At $50,000 in total revenue, this brand could owe sales tax registration in four or more states. The compliance cost — registration fees, filing fees, software subscriptions, and the time spent managing filings — can represent a meaningful percentage of revenue for a business at this scale.

How to Protect Your Business

If you are selling below $100K in total online revenue, you are not automatically exempt from sales tax obligations. Here is how to stay ahead of the compliance curve:

1. Know which states use an OR connector. The 200-transaction prong is what catches small sellers. Identify every OR state where you ship orders and monitor transaction counts monthly.
2. Track by state, not just in aggregate. Total revenue is irrelevant for nexus purposes — what matters is your sales into each individual state. Break down your sales data by destination state at least quarterly.
3. Flag trailing-12-month states. If you sell into any state with a rolling measurement window, set up automated alerts. Calendar-year states give you a clean reset; trailing states do not.
4. Separate marketplace vs. direct sales. In most states, marketplace facilitator sales do not count toward your direct seller threshold. Make sure your tracking distinguishes between the two channels.
5. Register proactively when you are close. If you are at 180 transactions in an OR state, do not wait for number 200. Voluntary registration avoids the penalty risk of late compliance. Check the registration process for states like Florida and Arizona in our state-specific guides.
6. Consider a voluntary disclosure agreement (VDA). If you discover retroactive exposure — especially from trailing-12-month crossings or the Kansas gap period — a VDA is typically the cleanest path to compliance. Most states will waive penalties in exchange for voluntary disclosure.