Navigating Sales Tax Nexus in 2026
Economic nexus laws have evolved. If you sell across state lines, you might owe tax even without a physical office.
· 1 min read
The 2018 South Dakota v. Wayfair Supreme Court ruling changed everything. It established "Economic Nexus," meaning that simply selling enough dollar value (usually $100k) or transaction volume (200 transactions) in a state obligates you to collect sales tax there.
The "SaaS Tax"
Historically, services were not taxed. But many states now classify SaaS (Software as a Service) as a tangible good or a taxable data processing service. If you have customers in New York, Texas, or Pennsylvania, you almost certainly owe sales tax on your subscriptions.
Automation is Mandatory
There are over 13,000 tax jurisdictions in the US alone. Keeping up with the rates manually is impossible. You must integrate a tax engine (like Avalara or Vertex) into your billing system. It calculates the tax in real-time based on the customer's zip code and adds it to the invoice.
Ignorance is not a defense. States are aggressively auditing remote sellers. Get compliant before the letter arrives.