Sales Tax Nexus
Definition
Sales tax nexus is the connection between a business and a state or jurisdiction that triggers an obligation to collect and remit sales tax. For SaaS companies, nexus can be established through physical presence, employee location, or exceeding economic thresholds (typically $100,000 in sales) in a given state.
Overview
Sales tax nexus determines where a business must collect and remit sales tax. Following the 2018 Supreme Court ruling in South Dakota v. Wayfair, states can require remote sellers, including SaaS companies, to collect sales tax based on economic nexus thresholds, even without physical presence.
Most states set economic nexus at $100,000 in sales or 200 transactions within the state per year. Once a SaaS company crosses that threshold in a state, it must register for a sales tax permit, begin collecting tax from customers in that state, and file periodic returns. The taxability of SaaS varies by state: some states tax it as tangible personal property, others exempt it.
Managing multi-state sales tax compliance is a growing operational challenge for scaling SaaS companies. Automated sales tax platforms (Avalara, TaxJar, Anrok) can handle rate calculation, collection, and filing. Founders should monitor their revenue by state and engage a tax professional proactively; retroactive sales tax liability (including penalties and interest) can be substantial.
Example
A SaaS company based in Delaware generates $150K in revenue from Texas customers. Texas has a $500K economic nexus threshold for sellers of taxable services, so the company may not yet have nexus there, but must monitor as it grows.
Related Terms
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