Growing your business is exciting. Whether you’re selling to customers across the country, opening a new location, hiring remote employees, or expanding your online presence, growth often creates new opportunities. It can also create new sales tax obligations.
Many businesses assume they only need to collect and remit sales tax in the state where they’re located. That may have been true years ago, but today’s tax landscape looks very different. As businesses expand beyond their home state, they may establish tax obligations in places they never expected.
Understanding when those obligations begin—and what to do about them—can help you avoid costly surprises down the road.
What Is Nexus?
One of the most important concepts in multi-state sales tax compliance is nexus.
Nexus is the connection between your business and a state that gives that state the authority to require you to register, collect, and remit sales tax.
In other words, once your business creates nexus in a state, you may have sales tax responsibilities there—even if you don’t have a traditional office or storefront.
Exactly what creates nexus varies by state, but there are two primary categories every business should understand.
Physical Nexus
Physical nexus has existed for decades and is generally created when your business has a physical presence within a state.
Examples may include:
- An office or retail location
- A warehouse or distribution center
- Inventory stored in the state
- Employees working in the state
- Independent contractors performing services
- Temporary job sites or installations
Even a relatively small physical presence can create sales tax obligations.
For example, hiring a remote employee in another state or storing inventory in a third-party fulfillment center may trigger registration requirements.
Economic Nexus
The biggest change to sales tax compliance in recent years has been the expansion of economic nexus laws.
Rather than focusing solely on physical presence, many states now require businesses to collect sales tax once they exceed certain sales or transaction thresholds within that state.
While every state establishes its own rules, common thresholds are based on:
- Annual sales revenue
- Number of transactions
- Gross receipts
- A combination of revenue and transaction volume
This means a business can create sales tax obligations without ever setting foot in the state.
For companies selling products or services online, economic nexus has become one of the most significant compliance considerations.
Online Sales Don’t Eliminate Your Responsibilities
Selling online has made it easier than ever to reach customers nationwide.
Unfortunately, it has also made sales tax compliance much more complicated.
Businesses often assume that because they’re selling through a website, marketplace, or e-commerce platform, someone else is handling the sales tax requirements.
That isn’t always true.
While marketplace facilitators may collect and remit tax on certain transactions, businesses often remain responsible for understanding where they have nexus, registering when required, and complying with each state’s reporting rules.
The responsibility ultimately belongs to the business owner—not the shopping cart software.
Common Situations That Trigger Multi-State Tax Obligations
Business owners are often surprised by how many everyday decisions can affect sales tax compliance.
Some of the most common situations include:
- Expanding sales into new states
- Hiring remote employees
- Opening additional offices or warehouses
- Storing inventory with third-party fulfillment providers
- Attending trade shows or temporary events
- Acquiring another business
- Launching e-commerce operations
- Selling through multiple online marketplaces
Many of these activities are signs of healthy business growth—but they can also create new registration and filing requirements.
Why Recordkeeping Matters
Knowing where you have nexus is only part of the equation.
Businesses also need accurate records to determine when registration requirements begin and to support future tax filings.
Important records may include:
- Sales by state
- Transaction counts
- Customer locations
- Inventory locations
- Employee work locations
- Marketplace sales versus direct sales
Without reliable reporting, it can be difficult to determine whether you’ve crossed a state’s economic nexus threshold—or when that happened.
By the time an issue is discovered during an audit, several years of filing obligations may already exist.
What Happens If You Miss a Registration Requirement?
Many businesses don’t intentionally fail to register in another state. They simply don’t realize they’ve established nexus.
Unfortunately, states generally don’t waive tax obligations because a business was unaware of the rules.
Potential consequences may include:
- Back taxes
- Interest charges
- Penalties
- Multiple years of unfiled tax returns
- Increased audit scrutiny
The longer the issue goes unnoticed, the larger the potential liability may become.
Best Practices for Businesses Operating in Multiple States
As your business grows, sales tax compliance should grow with it.
Consider adopting a few proactive practices:
- Periodically review where your customers are located.
- Monitor sales activity by state throughout the year.
- Track employee and inventory locations.
- Review new business activities that could create nexus.
- Evaluate whether registration requirements have changed.
- Work with advisors who understand multi-state sales tax rules.
A periodic nexus review is often far less costly than resolving several years of noncompliance after an audit.
Final Thoughts: Growth Shouldn’t Create Unnecessary Tax Risk
Expanding into new markets is an exciting milestone, but it also brings new compliance responsibilities.
Understanding how physical and economic nexus work, monitoring your business activities, and reviewing your state tax obligations regularly can help you stay ahead of changing requirements and reduce the risk of unexpected assessments.
If your business is growing across state lines—or you’re unsure whether you’ve created sales tax obligations outside your home state—contact us today!
