Sales Tax Nexus Rules for Remote Sellers in 2026
Think you only owe sales tax in states where you have a physical location? Not anymore.
Since the U.S. Supreme Court’s landmark Wayfair decision, many remote businesses are required to collect and remit sales tax based solely on their economic activity within a state—even if they have no office, warehouse, or employees there.
For 2026, understanding economic nexus is essential for online retailers, e-commerce businesses, and remote sellers.
What Is Economic Nexus?
Economic nexus means a business can establish a sales tax obligation through its sales activity in a state, even without any physical presence.
If your business exceeds a state’s sales threshold, you may be required to:
- Register for a sales tax permit
- Collect sales tax from customers
- File sales tax returns
- Remit collected taxes to the state
The Wayfair Decision Changed Everything
Before 2018, businesses generally needed a physical presence in a state before they were required to collect sales tax.
The Supreme Court’s South Dakota v. Wayfair decision eliminated that requirement, allowing states to enforce sales tax collection based on economic activity instead.
Today, nearly every state with a sales tax has adopted some form of economic nexus law.
Common Economic Nexus Thresholds
Although every state sets its own rules, the most common threshold is:
- $100,000 in annual sales
Some states also include a transaction threshold, while others use higher sales limits.
Examples include:
- California — $500,000 in sales
- Texas — $500,000 in sales
- Alabama — $250,000 in sales plus additional nexus requirements
- Mississippi — $250,000 in sales
Because each state measures sales differently, it’s important to review the specific rules where you do business.
Physical Presence Still Creates Nexus
Even after Wayfair, physical presence remains an independent reason to collect sales tax.
Your business may have nexus if you have:
- An office or storefront
- A warehouse or inventory
- Employees or sales representatives
- Certain affiliate or marketplace relationships
Economic nexus simply added another way for states to require tax collection.
Why State Rules Matter
Not every state calculates economic nexus the same way.
States may differ on:
- Which sales count toward the threshold
- Whether exempt sales are included
- Measurement periods
- Registration requirements
- Filing frequencies
Failing to monitor these differences can result in unexpected tax liabilities, penalties, and interest.
Key Takeaways
- ✔ Physical presence is no longer required to create sales tax nexus.
- ✔ Economic nexus is generally based on your sales activity within a state.
- ✔ Many states use a $100,000 annual sales threshold, but several use higher limits or additional transaction tests.
- ✔ Each state has its own rules for calculating and applying economic nexus.
- ✔ Remote sellers should regularly monitor sales by state to stay compliant.
Need Help Managing Multi-State Sales Tax?
Economic nexus rules continue to evolve, and every state has different registration, filing, and reporting requirements. Our CPA team can help determine where your business has nexus, identify filing obligations, and keep your business compliant as you grow.
Contact us today for expert guidance on multi-state sales tax compliance.
