US LLCs for Non-Residents: Mastering Economic Nexus for Sales Tax in 2026

Economic nexus fundamentally changed US sales tax collection after the 2018 Wayfair Supreme Court decision. Previously, businesses only needed to collect sales tax in states where they had a physical presence, like an office or warehouse. Now, remote sellers, including non-US LLCs, must collect sales tax if their economic activity within a state reaches certain thresholds.

These thresholds are not uniform. Most states define economic nexus as either exceeding $100,000 in gross revenue from sales into the state or completing 200 separate transactions into the state within a calendar year. Some states adopt only a revenue threshold, while others use both. It is crucial to check each state's specific rules.

Your first step is to monitor your sales data carefully. Track every sale made to customers in the US by state. As soon as your sales into a particular state cross that state's economic nexus threshold, you are typically required to register for a sales tax permit in that state.

For instance, if your Wyoming LLC sells $105,000 worth of digital goods to customers in California in 2026, you will likely establish economic nexus there. You would then need to comply with California's sales tax regulations, despite having no physical presence in the state.

Each state has its own set of rules regarding which types of goods and services are taxable, what the sales tax rates are, and how frequently returns must be filed. For example, some states tax digital goods, while others do not. This variation adds complexity for non-US founders.

Reviewing the official state Department of Revenue websites is essential. Services like those offered by Bastion Formations can help identify specific state requirements and assist with the registration process once nexus is established. Expect to register in several states if you have a broad customer base across the US.

Once nexus is triggered in a state, your US LLC must obtain a sales tax permit for that state. This usually involves applying online through the respective state's Department of Revenue portal. The process can take several weeks.

After registration, you will need to collect sales tax from your customers in that state at the applicable rates. You must then file sales tax returns and remit the collected taxes to the state on a regular basis, which can be monthly, quarterly, or annually, depending on your sales volume and state rules. Missing these deadlines can result in fines and penalties.

The distinction between taxable goods and taxable services varies by state. Most states tax the sale of tangible personal property. However, the taxation of services, including SaaS subscriptions, digital downloads, or consulting, is more nuanced.

Some states, like Pennsylvania, tax a broad range of services, while others, like Florida, generally do not tax services. You must understand how your specific products or services are treated in each state where you establish nexus. This will dictate whether you collect sales tax on them.

Managing sales tax across multiple states manually is impractical for most non-US founders. Sales tax automation software, such as Avalara, TaxJar, or Stripe Tax, can calculate, collect, and even remit sales tax on your behalf. These tools integrate with e-commerce platforms like Shopify or WooCommerce.

While these tools cost money, often a monthly fee of $50-$200 depending on volume, they significantly reduce the risk of non-compliance. Investing in such a solution is often more cost-effective than facing audits or penalties from non-compliance. This is a critical investment for businesses with significant US sales.