Economic Nexus & Sales Tax Compliance: How a Merchant of Record Helps

Growing your online business is easy until you have to deal with U.S. sales tax laws.

The moment your sales start climbing across different states, the economic nexus comes into play. Essentially, states can force you to collect and pay sales tax once you cross a specific revenue or transaction limit. You do not need a physical storefront or a local employee to trigger this law. Just selling to people who live in that state is enough.

For eCommerce and SaaS companies, this creates a massive compliance burden. Every state sets its own rules and limits, making it almost impossible to manage manually without making costly mistakes. A Merchant of Record (MoR) helps with this entire process. Because the MoR acts as the legal seller to the final customer, the MoR inherits the tax liability. They track the state thresholds, register as necessary, and handle tax remittances. Below, we will explain how the economic nexus works and why shifting the legal responsibility to an MoR protects your business.

What Is Economic Nexus?

Economic nexus is a sales tax rule that requires a business to collect and remit sales tax in a state once it exceeds certain economic activity thresholds there.

Unlike traditional nexus, which was based on physical presence, economic nexus is triggered by:

• Revenue earned in a state
• Number of transactions in a state
• Remote selling activity

This means you can create a tax obligation without ever setting foot in the state.

Economic nexus laws became widespread after the 2018 Supreme Court decision South Dakota v. Wayfair, which allowed states to enforce tax collection on remote sellers.

Why Economic Nexus Matters for eCommerce and SaaS Businesses?

Economic nexus impacts businesses that sell:

• Physical goods online
• Digital products
• SaaS subscriptions
• Marketplaces
• Cross-border eCommerce into the U.S.

Many companies don’t realize they’ve triggered nexus until they face back taxes, penalties, interest, state audits, or forced registration across multiple jurisdictions.

To understand the broader complexity of U.S. sales tax, you may also want to explore Gapp Group’s guide to eCommerce sales tax compliance.

Economic Nexus Thresholds Vary by State

Each state sets its own economic nexus thresholds.

Most states use thresholds such as:

• $100,000 in annual sales
• 200 transactions per year

However, many states have updated their rules, and some have removed transaction thresholds entirely.

That means compliance requires ongoing monitoring, accurate tax calculation, and up-to-date regulatory expertise.

Sales Tax Compliance Is More Than Just Collection

Economic nexus compliance involves multiple ongoing responsibilities, including:

• Determining where the nexus has been triggered
• Registering for sales tax permits
• Calculating correct state and local rates
• Collecting tax at checkout
• Filing periodic returns
• Remitting payments to each state
• Managing exemptions and resale certificates
• Responding to audits and notices

For most businesses, this is not a scalable internal process.

How a Merchant of Record Simplifies Economic Nexus Compliance

A Merchant of Record is a legal entity that takes responsibility for the transaction.

That includes full ownership of:

• Sales tax compliance
• Payments
• Fraud prevention
• Regulatory obligations

Instead of your business managing sales tax and compliance obligations directly, the Merchant of Record assumes responsibility for tax collection, filing, remittance, and transaction-level regulatory requirements. If you want a deeper explanation of the model, start with this overview of what a Merchant of Record is.

Benefits of Using a Merchant of Record for Sales Tax Compliance

Partnering with a Merchant of Record provides several major advantages:

1. Reduced Nexus Exposure

Because the Merchant of Record assumes responsibility for sales tax compliance, nexus-related obligations are managed on your behalf, not internally by your business.

2. No Multi-State Registration Burden

You avoid registering in dozens of jurisdictions.

3. Accurate Tax Calculation Everywhere

A Merchant of Record applies the correct state, county, and city rates automatically.

4. Filing and Remittance Handled End-to-End

No more managing monthly or quarterly sales tax returns.

5. Lower Audit and Compliance Risk

A Merchant of Record provides dedicated compliance infrastructure and tax expertise.

6. Faster Expansion Into New Markets

You can scale across the U.S. without compliance slowing you down.

Economic Nexus Compliance for Global Sellers

For international businesses entering the U.S., economic nexus rules can be even more complex.

Many global sellers are familiar with VAT or GST systems:

• The Tax Foundation provides a helpful definition of Value-Added Tax (VAT)
• ClearTax offers a clear breakdown of Goods and Services Tax (GST)

But the U.S. sales tax system is different because it operates at the state and local level, creating dozens of separate compliance jurisdictions.

A Merchant of Record allows global businesses to sell legally in the U.S. without building an in-house tax operation.

Who Should Consider a Merchant of Record?

A Merchant of Record is especially valuable for:

• High-growth eCommerce brands
• SaaS companies selling subscriptions
• International sellers entering the U.S. market
• Marketplace platforms
• Businesses selling into multiple states

If you are approaching nexus thresholds, MoR can prevent compliance debt before it builds.

Final Thoughts: Economic Nexus Compliance Doesn’t Have to Be a Burden

Economic nexus laws have made sales tax compliance one of the biggest operational challenges for online businesses selling across the U.S. If you’re selling into multiple states, there’s a strong chance your company has already triggered sales tax obligations, and trying to manage registrations, filings, remittances, and audit exposure internally can quickly become overwhelming.

A Merchant of Record is the simplest and most complete way to eliminate that complexity. With Gapp Group as your Merchant of Record, you can offload key compliance responsibilities, including:

• Economic nexus monitoring
• Multi-state sales tax calculation
• Filing and remittance
• Regulatory liability

So you can scale confidently without building an internal tax operation or worrying about state-by-state enforcement.

Frequently Asked Questions About Economic Nexus and Sales Tax