Key takeaways
- SaaS tax rules vary by state: Some states fully tax SaaS, others partially, and many don’t tax it at all, making compliance a state-by-state challenge.
- Economic nexus is critical: Even without physical presence, SaaS companies may be required to collect sales tax if they exceed sales or transaction thresholds in a state.
- Automation and expert help are essential: Leveraging tax technology and professional advice can simplify compliance and reduce the risk of costly errors.
- California and Colorado tax SaaS from 2027: Both states start taxing most SaaS on January 1, 2027, with exemptions for custom software and, in Colorado, negotiated signed licenses.
In short: Sales tax on SaaS depends on the state. Some US states tax SaaS, some tax it only in part, and many don’t tax it at all. Since South Dakota v. Wayfair, SaaS companies can owe sales tax in states where they have no physical presence once they pass economic nexus thresholds. California and Colorado start taxing most SaaS on January 1, 2027.
Software as a Service (SaaS) businesses face many challenges, and one of the hardest is US sales tax. As SaaS providers sell across state lines, they need to understand and follow each state’s sales tax rules.
This guide explains how US sales tax works for SaaS companies. It also gives you practical strategies for managing your sales tax.
Updated November 2026: California and Colorado will tax most SaaS from January 1, 2027, so we updated the state lists and added a section on both changes.
What is a SaaS company?
A SaaS (Software as a Service) company delivers software applications over the internet, usually through a subscription. Users don’t buy and install the software on their own devices. Instead, they access SaaS products through a web browser.
SaaS products range from accounting platforms and project management tools to customer relationship management (CRM) systems and tax compliance solutions. For SaaS providers, cloud delivery offers scale and convenience. But it also creates unique tax issues, especially as services cross state lines and enter new markets.
Why is US sales tax complex for SaaS?
US sales tax is complex for SaaS because each state sets its own rules and rates, and most state laws were written before SaaS existed. Unlike tangible goods, SaaS products exist only in digital form. That makes it harder to decide whether they are taxable.
The United States has no uniform sales tax system. For SaaS companies, this creates a big compliance challenge. They must work through 50 different sets of rules to decide where to collect and remit tax, and how much.
What determines whether SaaS is taxable?
Whether SaaS is taxable depends mainly on state law, nexus and how the state treats digital products. These factors decide whether SaaS sales are subject to sales tax in the US:
State-specific legislation: Some states tax SaaS as a tangible product, others as a service, and a few do not tax SaaS at all. This classification affects whether sales tax applies.
Nexus: A company must have a "nexus" in a state before it has to collect sales tax there. In the past, nexus meant a physical presence. The landmark South Dakota v. Wayfair, Inc. Supreme Court decision expanded nexus to include economic activity, such as sales revenue or transaction volume.
Digital product regulations: States also treat digital products and services differently. Some separate downloaded software (taxable) from cloud-based services (sometimes non-taxable).
How did South Dakota v. Wayfair, Inc. affect SaaS companies?
The 2018 Supreme Court decision in South Dakota v. Wayfair, Inc. changed the rules for online and remote sellers, including SaaS companies.
The Wayfair decision lets states charge sales tax on purchases from out-of-state sellers, even if the seller has no physical presence in the state. This put the focus on "economic nexus." For SaaS providers, passing certain sales or transaction thresholds in a state can create a tax obligation.
What types of sales tax nexus apply to SaaS?
The three types of sales tax nexus that apply to SaaS are physical, economic and click-through nexus. Sales tax nexus is a legal term for situations that give a state tax authority over an out-of-state business. For SaaS companies, sales tax nexus decides when and where they must collect and remit sales tax. Let’s look at each type of nexus. For a closer look, see Six Sales Tax Trends to Watch in 2025.
Physical nexus
A physical presence in a state creates a nexus that requires a SaaS business to collect sales tax. This includes:
- Having an office location or an employee working in the state
- Owning or leasing office space
- Maintaining a mailing address
- Employing independent contractors
- Storing inventory or using a warehouse
- Engaging with affiliates
Each of these activities can create a nexus and require you to collect sales tax.
States enforce sales and use tax rules strictly for businesses with a physical nexus. So SaaS companies and other businesses need to track their physical presence in each state carefully. Property or payroll in a state may also create a physical presence nexus.
Economic nexus
Economic nexus means tax obligations that arise from a certain level of economic activity in a state. SaaS companies with no physical presence may still need to collect and remit sales tax once they pass certain thresholds. These thresholds vary by state but are typically $100,000 in sales or 200 separate transactions.
Once a SaaS business has economic nexus in a state, it may need to:
- Register and remit sales tax
- Evaluate different types of sales such as retail or gross sales
- Evaluate the threshold annually or on a trailing period
These rules can affect small companies that have nexus in many states. Ignoring economic nexus laws can be costly for SaaS businesses. Costs include back taxes, penalties and the work of catching up on compliance.
Click-through nexus
Click-through nexus applies to online retailers, including SaaS businesses, that make sales through affiliates in a state. It applies when a company works with in-state affiliates who refer customers through web links or other methods. This lets states tax online sales that would otherwise go untaxed because the seller has no physical presence.
States set thresholds for sales made through in-state affiliates to enforce click-through nexus. These thresholds vary by state. We cover this in more detail in What Is Click Through Nexus?.
Over 20 states have click-through nexus laws. These laws are now easier to enforce since the Supreme Court overruled the physical presence requirement for sales tax collection.
Which states have SaaS sales tax requirements?
SaaS sales tax requirements differ a lot from state to state, so SaaS companies need to know each state’s rules. The line between taxable and non-taxable states is not always clear. Some states take their own approach based on the type of SaaS offering or how it is used.
For example, Connecticut taxes SaaS for personal use at the full state rate but offers a reduced rate for business use. This shows how sales tax laws keep changing as states adapt to the digital economy. Related reading: Origin-Based vs Destination-Based Sales Tax Rates - What’s the Difference?.
Below is a list of the states that do and don’t require sales tax on SaaS products.
States where SaaS is taxable
- Arizona
- Connecticut (SaaS for personal use is taxed at the full state rate, but SaaS for business use is only taxed at 1%)
- Hawaii
- Iowa (Taxable, except when being used for business purposes, then it is exempt)
- Kentucky (As of January 1, 2023)
- Louisiana
- Maryland (Taxed at 6% for personal use; SaaS for business use is taxed at 3% as of July 1, 2025)
- Massachusetts
- New Mexico
- New York
- Ohio (Taxable for business use, non-taxable for personal use)
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas (Considered part of a data processing service, 80% taxable, 20% exempt)
- Utah
- Washington (All software, delivered by whatever means, is considered taxable)
States where SaaS is not taxable
- Arkansas
- California (No, taxable from January 1, 2027)
- Colorado (No, taxable from January 1, 2027)
- Florida
- Georgia
- Idaho
- Illinois
- Indiana
- Kansas
- Maine
- Michigan (Non-taxable unless there is a downloadable component)
- Minnesota
- Mississippi
- Missouri
- Nebraska
- Nevada
- New Jersey
- North Carolina
- North Dakota
- Oklahoma
- Vermont (As of July 1, 2015)
- Virginia
- Wisconsin
- Wyoming
What changes for SaaS in California and Colorado in 2027?
From January 1, 2027, both California and Colorado will tax most SaaS. Until then, SaaS stays non-taxable in both states.
California: Senate Bill 122 adds digital products to the definition of tangible personal property. This covers prewritten software delivered electronically or accessed remotely, including prewritten SaaS. Custom software, digital products sold with reproduction and distribution rights, and products bought only for use outside California are exempt. Digital infrastructure, such as cloud platforms used to build or run your own applications, is not a digital product. Out-of-state sellers engaged in business in California must register for a Certificate of Registration for use tax. (Source)
Colorado: House Bill 26-1223 makes computer software generally taxable, whatever the delivery method. This includes remote access over the internet. Software stays exempt only if it is developed for a particular user, or if it is governed by a negotiated license agreement signed in writing by both parties. Click-through and standard form agreements do not qualify. Home-rule cities may apply their own rules. (Source) (Source)
If you sell SaaS into either state, check your contracts, product taxability and registrations before January 1, 2027.
How can SaaS companies stay compliant with sales tax?
SaaS companies can stay compliant by checking their nexus, tracking law changes, using tax software and getting expert advice. Consider these strategies:
Conduct a nexus analysis: Review your activities in each state regularly. This shows where you have nexus and must collect and remit sales tax.
Stay updated on legislation: Sales tax laws and rules change all the time. Keep up with changes, especially as states adapt to the digital economy.
Leverage technology: Tax automation software makes it easier to calculate, collect and remit sales tax across many jurisdictions. These tools can also track nexus thresholds and taxability rules.
Seek expert advice: Sales tax law is complex, so you may need to consult tax professionals. Expert guidance helps you handle the details of state rules and stay compliant.
Conclusion
SaaS companies in the US need a proactive, informed approach to sales tax. State laws vary, and the rules on nexus and digital product taxability keep changing. That means you need to stay alert and adapt.
Understand the key factors behind sales tax liability. Use technology for compliance and get expert advice when you need it. This way, SaaS providers can stay compliant with US sales tax while focusing on their core business.
Do you need help understanding your nexus exposure? Contact LumaTax and let us get your sales tax compliance on track with our automated data analysis and expert review. Our tax technology offers a unified sales tax solution for businesses big and small.
How Taxually handles this
Taxually’s LumaTax runs a nexus analysis on your sales, helps you register in the states where you must collect, and prepares and files multi-state sales tax returns, including Canadian GST/HST. LumaTax is currently available to enterprises and accounting firms. For the full workflow, read how to automate US sales tax filing in every state.
Related guides
Frequently asked questions
What is SaaS and why is it subject to sales tax?
Software as a Service (SaaS) is a cloud-based service where instead of downloading software on your desktop PC or business network to run and update, you instead access an application via an internet browser. The applicability of sales tax on SaaS depends on the jurisdiction's tax laws, as some states consider SaaS a taxable service while others do not.
How do I determine if my business has a tax nexus in a particular state?
A tax nexus is a specific kind of connection between a taxing jurisdiction (such as a state) and an entity (such as your business) that enables the jurisdiction to tax the entity. Traditionally, physical presence, like an office or warehouse, established nexus. However, recent laws now include economic activity, such as sales volume, as criteria for establishing a nexus.
Are there any exemptions to sales tax for SaaS?
Yes, some jurisdictions may offer exemptions for SaaS products based on how the service is used (educational or non-profit use, for example) or based on the purchaser's status (like government bodies). Additionally, some states may not tax SaaS at all, considering it a non-tangible good.
What challenges do businesses face in complying with SaaS sales tax?
Businesses may struggle with understanding the varying laws across jurisdictions, determining if their service qualifies as taxable SaaS, calculating the correct amount of sales tax, and integrating sales tax compliance into their billing systems.
Can changes in legislation affect how SaaS is taxed?
Yes, tax laws are evolving, especially with the growth of digital goods and services like SaaS. It's crucial for businesses to stay informed about legislative changes in the jurisdictions where they operate to ensure ongoing compliance with sales tax laws.
Will California and Colorado tax SaaS in 2027?
Yes. From January 1, 2027, California taxes prewritten software, including remotely accessed SaaS, under SB 122. Colorado makes computer software generally taxable under HB26-1223, whatever the delivery method. Custom software is exempt in both states, and Colorado also exempts software under negotiated signed license agreements.
