Does Selling Services to US Customers Create Sales Tax Nexus?

Selling services to customers in the United States does not automatically mean your business has sales tax nexus in every state. However, depending on the state, the type of service you provide, your sales volume, and how the service is delivered, selling to US customers can create an obligation to register, collect, and remit sales tax.

This distinction matters especially for SaaS companies, consultants, agencies, freelancers, and global founders operating through a US LLC. The key question is not simply “Do I have US customers?” It is: Does my business have nexus in a particular state, and is the service I sell taxable there? Those are two separate questions.

What Is Sales Tax Nexus?

Sales tax nexus is the connection between a business and a state that gives the state authority to require the business to collect and remit sales tax. Historically, physical presence was the central test. That changed significantly after the US Supreme Court's 2018 decision in South Dakota v. Wayfair. The Court held that an out-of-state seller could potentially be required to collect sales tax based on economic activity in a state, even without a traditional physical presence.

Today, states commonly use economic nexus rules based on sales revenue, transaction volume, or both. The exact thresholds and what counts toward those thresholds vary by state. For a remote business, this means having no office, employees, or warehouse in a state does not necessarily eliminate sales tax obligations.

Does Selling Services Create Nexus?

It can. But selling services to US customers does not automatically create sales tax nexus. There are two issues to examine.

1. Has your business created nexus?

A state may consider factors such as:

• Revenue from customers in the state
• Number of transactions
• Employees or contractors working in the state
• Offices or other physical property
• Representatives or affiliates in the state
• The way your services are delivered Economic nexus is particularly important for online businesses because a company can develop sufficient economic activity in a state without maintaining a physical location there.

2. Is your service taxable?

Even if you have nexus, the service itself may not be subject to sales tax. This is where many founders make the mistake of treating “sales tax nexus” and “taxable sale” as the same thing. They are not.

States have different rules about which services are taxable. Some broadly tax certain categories of services, while others tax only specifically enumerated services. Software, digital products, professional services, consulting, advertising, information services, and SaaS can all receive different treatment depending on the state. Avalara's state-by-state research illustrates how dramatically service taxation and nexus rules can differ across jurisdictions.

A Simple Example

Imagine a Nigerian founder operates a US LLC that provides online marketing consulting. The company has:

• No office in California
• No California employees
• No physical inventory
• Several California customers
• $80,000 in annual California-related service revenue The $80,000 of revenue does not automatically mean the LLC owes California sales tax. The founder would need to determine:

1. Whether California considers the business to have nexus.
2. Whether the particular consulting service is taxable.
3. How California's economic nexus rules apply to the company's sales.
4. Whether any registration or filing obligation exists even if the service is ultimately exempt. That same analysis could produce a different result in another state.

What About SaaS and Digital Services?

SaaS founders need to be especially careful because software delivered over the internet can fall under different tax classifications from traditional professional services. For example, a business selling:

• Project-management software
• Online accounting software
• AI-powered software
• Digital subscriptions
• Consulting
• Web development
• Marketing services

Should not assume that all of these products are treated identically for sales tax purposes. The customer's location can also matter because states generally determine whether a remote sale is connected to their jurisdiction under their own sourcing and nexus rules. This is one reason sales tax compliance becomes more complicated as a SaaS company expands beyond a handful of states.

Economic Nexus Thresholds Are Not Universal

There is no single US-wide sales threshold that applies to every service business. For example, current state rules can differ significantly in what transactions count toward an economic nexus threshold and whether taxable or exempt services are included. Pennsylvania, Louisiana, Mississippi, and other states have different approaches.

The Streamlined Sales Tax organization also maintains state-specific information for remote sellers and registration requirements, reinforcing that businesses need to evaluate obligations state by state.

Therefore, a founder should avoid rules of thumb such as: “I don't have employees there, so I don't owe sales tax.” or: “I made less than $100,000, so I don't have nexus.” Those statements can be wrong depending on the state and the nature of the business.

What Should Global Founders Do?

For a non-US founder operating a US LLC, a practical sales-tax review should look like this:

Step 1: Identify where your customers are located.
Do not simply record “United States.” Track the customer's state and, where required, the relevant local jurisdiction.

Step 2: Classify what you sell.
Determine whether you sell consulting, professional services, SaaS, digital products, subscriptions, or another category.

Step 3: Check nexus thresholds.
Review each state where your business has meaningful sales or other connections.

Step 4: Determine taxability.
Nexus does not automatically mean the underlying service is taxable.

Step 5: Determine your registration and filing obligations.
If you have crossed a state's applicable threshold or created nexus through another connection, registration may be required.

Step 6: Keep transaction-level records.
Maintain customer location, transaction amount, product or service type, tax charged, exemptions, refunds, and dates. Platforms and certified sales-tax providers can also help automate calculation and administration. The Streamlined Sales Tax program, for example, provides a registration system and certified-provider framework for participating states.

Does a US LLC Automatically Have Sales Tax Nexus?

No. Forming an LLC in Wyoming, Delaware, New Mexico, or another state does not by itself mean the company has sales tax nexus everywhere in the United States. Your formation state is only one part of the picture. Customer locations, physical activities, employees, contractors, economic activity, and the nature of what you sell can all matter.

This distinction is particularly important for international founders who establish a US company through platforms such as Foundeck, an AI-powered US company formation and management platform for global founders. Forming the company is one step; understanding its ongoing state-level tax and compliance obligations is another.

Frequently Asked Questions

Does having US customers automatically create sales tax nexus?

No. Customer presence alone does not automatically create nexus in every state. Economic activity, physical connections, state-specific rules, and other factors must be considered.

Are consulting services subject to US sales tax?

Not universally. The taxability of consulting and other professional services varies by state and by the precise nature of the service.

Does SaaS create sales tax nexus?

SaaS revenue can contribute to economic nexus thresholds, and SaaS itself may be taxable in some jurisdictions. The rules differ by state.

Do I need a physical office to have sales tax nexus?

No. Economic nexus rules allow states to establish sales tax obligations based on economic activity even when a seller has no traditional physical presence.

Does exceeding an economic nexus threshold always mean I owe sales tax?

Not necessarily. Crossing a nexus threshold can create a registration and collection obligation, but you still need to determine whether the specific product or service is taxable.

Can a foreign-owned US LLC have sales tax nexus?

Yes. Foreign ownership does not prevent a US LLC from having sales tax obligations. The analysis generally focuses on the company's activities and connections with individual states.

Is sales tax the same as federal income tax?

No. Sales tax is generally a state or local consumption tax collected from customers, while federal income tax is a separate tax system. Creating sales tax nexus does not, by itself, answer the company's federal income-tax obligations.

Conclusion

Selling services to US customers can create sales tax nexus, but it does not automatically do so simply because the customer is American. The most important distinction is between nexus and taxability. First determine whether your business has established a sufficient connection with a state. Then determine whether the particular service you sell is taxable there.

For SaaS companies, agencies, consultants, and global founders, the safest approach is to monitor sales by state, understand each state's economic nexus threshold, classify services correctly, and maintain detailed transaction records.

US sales tax is ultimately a state-by-state compliance issue. As your customer base grows, periodically reviewing where you have nexus can prevent a small administrative issue from becoming a much larger tax compliance problem.