You launched a SaaS product. Revenue is growing. Customers are signing up from across the United States. Everything is going well, until someone on your team Googles “do SaaS companies pay sales tax” and lands on a result that says you might owe back taxes in a dozen states you’ve never thought about. This is not a hypothetical. It happens to scaling SaaS companies every day.
Is SaaS Actually Taxable in the US?
The short answer: it depends on the state and the landscape keeps shifting. Unlike physical goods, which are taxable in almost every jurisdiction, SaaS sits in a complicated middle ground. States haven’t updated their tax codes uniformly to account for cloud-based software, so you end up with three broad categories:
- States where SaaS is taxable: New York, Texas, Pennsylvania, and Washington are clear examples. If you have customers in these states and meet the economic nexus threshold, you are legally required to collect and remit sales tax on your subscriptions.
- States where SaaS is generally not taxable: Some states — including California and Florida — have not extended their sales tax to SaaS in most cases. Nuances exist depending on product classification and delivery.
- States that are ambiguous or inconsistent: Many states have issued no clear guidance, or have rulings that hinge on technical factors — whether your software is “accessed” rather than “downloaded,” or whether it includes a professional services element.
The practical implication: you cannot apply a single rule across all 50 states. You need to understand your product’s classification in each state where you have — or may soon develop — a tax obligation. And that starts with understanding economic nexus.
Economic Nexus: The Rule That Changed Everything for SaaS
Before 2018, if you had no physical presence in a state — no office, no employees — you had no sales tax obligation there. The Supreme Court’s ruling in South Dakota v. Wayfair ended that entirely. The court held that states could require out-of-state sellers to collect and remit sales tax based purely on economic activity. Within two years, virtually every US state with a sales tax had enacted economic nexus legislation.
What the thresholds look like in practice
- Revenue threshold: $100,000 in sales to customers in that state during a calendar year
- Transaction threshold: 200 separate transactions to customers in that state (though several states have now removed this trigger)
Crossing either threshold creates a collection obligation, regardless of where your company is headquartered, and regardless of whether you even knew the threshold existed.
What this means for your SaaS company
Consider a straightforward example: 400 customers in Texas, each on a $300/month plan. You crossed $100,000 in Texas revenue before April. Texas taxes SaaS. You have had a legal collection obligation in Texas since you crossed that threshold and if you haven’t been collecting, that’s a liability that’s been accruing.
For a SaaS company with $5M in US ARR, a two-year compliance gap across 10 states can represent several hundred thousand dollars in combined exposure. This is not a theoretical risk — it is an increasingly enforced one.
Which States Deserve the Most Attention?
- Texas: Taxes SaaS and has one of the broadest definitions of “data processing services” in the country; broad enough to capture software products that companies sometimes assume are exempt.
- New York: Taxes SaaS explicitly. The state’s large population means most SaaS companies cross the nexus threshold relatively quickly.
- Pennsylvania: Taxes SaaS and has some of the most complex rules around what constitutes a taxable digital good versus an exempt service.
- Washington: Taxes SaaS comprehensively, applying the obligation to both B2B and B2C transactions without distinction.
- California: Generally does not tax SaaS — but the state’s rules around software classification are detailed, and the size of the market makes getting it right important.
The map is not static. States regularly revisit their treatment of cloud software. A state that exempts SaaS today may legislate a different position within the next 12 months.
What Are Your Real Options?
Option 1: Build it internally
Register in every state where you have nexus, file returns on each state’s schedule, track rule changes, and manage audits when they arise. For most SaaS companies, it is not the right use of resources and the cost of errors is borne entirely by your business.
Option 2: Use tax compliance software
Tools like Avalara, TaxJar, and Anrok automate tax calculation and assist with filing. They are genuinely useful — but they calculate your tax obligation. They don’t take on your tax liability. You remain the taxpayer. You still need to register in every state where you have nexus and your company can be subject to audits and other assessments. The software reduces the administrative burden, but it does not remove the obligation.
Option 3: Transfer the liability entirely
- Merchant of Record (MoR): Outpost becomes the legal seller in your transactions. Outpost handles every registration, calculation, filing, and remittance. If there is an audit, Outpost responds to it. Your liability for indirect tax in every jurisdiction goes to zero.
- Tax of Record (ToR): A newer model that lets you maintain your direct customer relationship — your name on the invoice, your commercial terms — while transferring the tax liability to Outpost. Built on intermediary liability structures, Tax of Record gives you the compliance certainty of an MoR without giving up commercial control.
The choice between MoR and ToR comes down to how you want your customer relationship structured. In both cases, the tax obligation is no longer yours.
Ready to take sales tax off your plate?
Book a demo with Outpost and we’ll walk you through exactly where your current exposure sits and how quickly we can take it off your plate.
This article is for informational purposes and does not constitute legal or tax advice. Tax rules vary by jurisdiction and change frequently. For advice specific to your business, consult a qualified tax professional.
