As more small businesses expand online, ecommerce brings new customers, more revenue, and the chance to sell goods and services beyond their local community. However, with growth comes something many entrepreneurs don’t learn about until taxes get complicated, NEXUS. For small businesses selling in Texas and across state lines, understanding Ecommerce Nexus is essential to staying tax-compliant, avoiding penalties, and planning for long-term success.
What Is Ecommerce Nexus?
In simple terms, Nexus is a legal connection between a business and a state that determines whether sales tax must be collected and remitted. Before ecommerce, Nexus was based primarily on physical presence. For instance, if your business had a storefront, inventory, or employees in Texas, you collected tax in Texas (your state). The amount collected was based on your physical location and the requirements for that city, county or state.
Why is it called “Nexus”?
In the world of online selling, “nexus” is simply a fancy word for connection, however it is a connection that matters. It represents the level of presence or activity a business must have in a particular state before that state can legally require the business to collect and remit sales tax. The term traces back to the Latin nectere, meaning to tie or bind, which makes sense: once a business is “tied” to a state through operations, sales activity, or physical presence, it’s considered part of that state’s tax network.
In everyday terms, nexus is the line that determines when your business becomes responsible for another state’s tax rules, even if you don’t physically operate there. It’s the moment your online store isn’t just shipping products, it is creating a strong enough footprint that a state can enforce sales tax obligations. Nexus is the legal thread that binds a business to a state’s tax system, even across digital borders.
The Digital (Online) marketplace and Nexus in 2026:
Today, economic Nexus laws require out-of-state sellers to collect sales tax once they hit a certain number of sales or revenue in another state, even if they do not have a physical location there. That means a Texas small business selling goods or services online could owe tax to states it has never stepped foot in.
Types of Nexus Small Businesses Should Know:
To understand compliance, it helps to know that Nexus comes in several forms. Each one may trigger tax responsibility depending on where and how you sell. The most common forms of Nexus include:
- Physical Nexus: triggered by stores, warehouses, inventory, or employees
- Economic Nexus: triggered by sales revenue or transaction volume in a state
- Affiliate Nexus: triggered when related businesses operate across state lines
- Marketplace Nexus: triggered when selling through platforms like Amazon or Etsy
While Nexus rules vary by state, most economic thresholds fall around:
- $100,000 in sales, or
- 200 transactions per year
Some states require both. Others only require one. This is where many small business owners get caught off guard.
How Ecommerce Nexus Affects Small Businesses:
If your small business sells strictly in-person within Texas, you may only need to worry about Texas sales tax requirements. However, if you ship products to customers in other states, even occasionally, you may accidentally establish Nexus without realizing it. Ecommerce Nexus affects businesses by:
- Requiring multistate tax registration
- Increasing sales tax tracking responsibilities
- Adding bookkeeping and reporting workload
- Changing how products are priced or bundled
For small business owners expanding across the country, Nexus compliance isn’t just important, it’s mandatory.
Marketplace Sellers: Nexus Rules Are Different
Just a note to be aware of: Many small businesses now operate through Shopify, Etsy, Amazon, WooCommerce, TikTok Shops, and other ecommerce platforms. What some don’t realize is that the marketplace may collect tax, but the seller is still responsible for knowing where Nexus exists.
For example:
Amazon might collect and remit tax for you, but if you also sell through your own website, the responsibility could shift. The rules are platform-specific, which is why business owners must track sales by state, not just total sales. Confused yet? We’re here to help!
How To Stay Nexus-Compliant Without Being Lost or Overwhelmed:
Nexus compliance doesn’t have to be stressful. With the right approach, small businesses can manage multistate sales tax efficiently and confidently. Start with these steps:
- Track sales by state: volume and revenue both matter
- Know each state’s threshold: rules differ across the U.S.
- Keep organized sales tax records for filings and audits
- Use software like Avalara, TaxJar, or QuickBooks Commerce
- Ask a tax advisor before expanding into new states
A strong ecommerce tax strategy protects your business before issues arise.
How Trinity Valley SBDC Can Help:
Understanding Nexus is easier with the right guidance and Trinity Valley SBDC is here to support local entrepreneurs every step of the way. Our business advisors can help with the following Nexus-related issues:
- Identify where your business has Nexus
- Evaluate online platform tax collection settings
- Organize multistate sales tracking and filing
- Build scalable ecommerce strategies for growth
Expanding ecommerce is exciting! Let us help clarify Nexus compliance to ensure you can grow with clarity, not confusion. Whether you sell across Texas or nationwide, the Trinity Valley SBDC helps businesses in Kaufman, Henderson, Anderson, Van Zandt, and Rains Counties operate legally, profitably, and confidently online.
Trinity Valley SBDC (TVCCSBDC) is a partnership program with the U.S. Small Business Administration, the State of Texas, and Trinity Valley Community College. Advising services are offered by Trinity Valley SBDC without regard to race, color, age, national origin, religion, sex, or disability. Special provisions will be made for limited English speaking individuals and those with disabilities. Those interested may contact TVCC SBDC at 903-675-7403.
All opinions, conclusions, and/or recommendations expressed herein are those of the author(s) and do not necessarily reflect the views of the U.S. Small Business Administration or other funding partners.