Your tax team is diligent, experienced, and thorough. But in 2026, the most dangerous multistate sales tax risks aren’t the obvious ones. They’re the routine business activities that quietly create unexpected tax nexus triggers before anyone realizes there’s a problem.
A technician sent to install equipment in another state. A consultant visiting a client site for a week. A leasing arrangement that crosses state lines. These everyday operations can generate sales tax audit exposure that surfaces months or years later, often during an audit when the penalties have already compounded.
Here’s what you need to know: Most tax teams aren’t missing these risks because they’re careless. They’re missing them because the rules keep changing, and the activities creating liability often happen outside the finance department’s line of sight.
In this guide, we’ll walk through five specific multistate sales tax risks that frequently slip through the cracks, including real examples of how they create unexpected filing obligations. You’ll learn what triggers nexus in ways your team might not be tracking, how to identify exposure before an auditor does, and when it makes sense to bring in expert support. Whether you’re managing compliance in-house or evaluating your current process, this breakdown will help you protect your business from surprises you didn’t see coming.
Risk 1: On-Site Installation and Service Visits That Create Physical Presence Nexus
Your sales team closes a deal in a new state. Your operations team sends a technician to install the equipment. Everyone celebrates the win. But nobody flags the tax implication: that single installation visit may have just created nexus in a state where you’ve never filed a return.
Physical presence nexus remains one of the most straightforward triggers in sales tax law. When your employees, contractors, or representatives perform work in a state, you’re often considered to be “doing business” there. And in 2026, states are getting more aggressive about tracking these activities.
Here’s what typically creates physical presence nexus:
- Installation or setup services performed at customer locations
- Repair and maintenance visits, even if they’re one-time
- Training sessions conducted on-site
- Quality assurance inspections or audits
- Delivery by your own employees rather than common carriers
The challenge is that these activities often happen without any notification to the tax team. Operations schedules the visit. The technician completes the work. Finance never hears about it until an auditor asks why you’ve had employees in their state for the past three years without registering.
A real scenario we see frequently: A manufacturing company sends installation technicians to customer sites across 12 states. Each visit lasts two to three days. The company has economic nexus analysis in place, but nobody is tracking physical presence. During an audit, the state identifies employee travel records and assesses back taxes, penalties, and interest for four years of unreported activity.
What you can do about it:
- Create a simple reporting process for any employee travel that involves customer-facing work
- Include nexus questions in your travel approval workflow
- Review contractor agreements to understand where third parties are performing services on your behalf
- Build a quarterly review of states where employees have performed on-site work
The fix here isn’t complicated. It’s about creating visibility between operations and finance before the activity happens, not after an auditor finds it.
Risk 2: Temporary Consulting and Training Visits That Fly Under the Radar
Consulting visits feel different from installation work. They’re advisory. They’re temporary. They don’t involve tangible products. So they must be lower risk, right?
Not necessarily. Many states consider consulting services performed within their borders to be taxable, and the physical presence of your consultant can create nexus regardless of whether the service itself is taxable.
This creates a two-part problem:
- The presence of your employee in the state may trigger nexus, obligating you to collect tax on all taxable sales to customers in that state.
- The consulting service itself may be taxable, depending on the state and the nature of the work.
Training visits carry similar risks. If your team travels to a client site to conduct training, you’re performing a service in that state. Some states tax training services. Others don’t. But either way, the physical presence can trigger broader obligations.
Where tax teams typically miss this:
- Short-term project work that spans a few weeks
- Recurring visits to the same client over multiple quarters
- Training sessions bundled with software or equipment sales
- Advisory services that support a larger product implementation
Consider this example: A SaaS company sends implementation consultants to client sites for two-week onboarding sessions. The software itself is sold remotely, and the company tracks economic nexus carefully. But the consulting visits create physical presence in states where the company hasn’t registered. When the state audits, they assess tax on all software sales to customers in that state, not just the consulting fees.
Questions to ask your team:
- Do we have employees or contractors who travel to client sites for consulting, training, or advisory work?
- Are we tracking which states those visits occur in?
- Have we evaluated whether those services are taxable in each state?
- Does our economic nexus analysis account for physical presence triggers?
The goal is to connect the dots between your service delivery model and your compliance obligations. If your people are in a state doing work, you need to know about it.
Risk 3: Leasing and Rental Arrangements With Multistate Implications
Leasing arrangements create some of the most overlooked multistate sales tax risks. The rules vary dramatically by state, and the tax treatment often depends on factors that aren’t immediately obvious.
Here’s the honest truth: leasing is complicated because you’re dealing with questions about where the property is located, where it’s used, who owns it, and how the payments are structured. Get any of these wrong, and you’re looking at unexpected tax nexus triggers that can span multiple states.
Common leasing scenarios that create exposure:
- Equipment leased to customers who move it between states
- Vehicles leased for use across multiple jurisdictions
- Property leased from your business but used at customer locations
- Lease-to-own arrangements that change tax treatment mid-contract
The location question is critical. Many states tax leases based on where the property is used, not where the lessor is located. If you lease equipment to a customer in State A, but they use it in States B and C, you may have nexus and collection obligations in all three states.
A scenario we encounter regularly: A company leases specialized equipment to construction firms. The equipment moves from job site to job site, crossing state lines multiple times per year. The lessor collects tax based on the customer’s billing address, but the states where the equipment is actually used assess additional tax, penalties, and interest during an audit.
What makes leasing particularly tricky:
- Some states tax the full lease payment upfront; others tax each payment as it’s made
- The distinction between a “true lease” and a “conditional sale” affects tax treatment
- Maintenance and service bundled with leases may be taxed differently than the lease itself
- Subleasing arrangements add another layer of complexity
Steps to reduce your exposure:
- Map where leased property is actually used, not just where it’s billed
- Review lease agreements for language that affects tax classification
- Understand each state’s sourcing rules for lease transactions
- Consider whether your lease management system can track location data
If leasing is a significant part of your business model, this is one area where a focused review can prevent substantial audit adjustments down the road.
Risk 4: Inventory Storage and Fulfillment Arrangements in Third-Party Locations
Storing inventory in a state creates nexus. This isn’t new. But the ways businesses store inventory have changed dramatically, and tax teams don’t always have visibility into where products are actually sitting.
Third-party logistics providers, Amazon FBA, regional fulfillment centers, and consignment arrangements all create potential nexus triggers. If your products are in a state, you likely have an obligation to register and collect tax there.
Here’s where tax teams typically lose track:
- Third-party fulfillment centers that distribute inventory across multiple states without clear reporting
- Consignment inventory held at customer locations or retail partners
- Amazon FBA and similar marketplace programs that move inventory between warehouses
- Drop-ship arrangements where a supplier ships directly to your customer from their location
The challenge with third-party logistics is that you may not know where your inventory is at any given time. Fulfillment providers optimize for shipping speed, not tax compliance. They move products between warehouses based on demand patterns, and you may not receive detailed location reports.
A common example: An ecommerce company uses a fulfillment provider with warehouses in eight states. The company tracks economic nexus thresholds but doesn’t realize their inventory has been distributed to all eight locations. Each state where inventory is stored has nexus, regardless of whether sales to that state exceed economic thresholds.
Amazon FBA creates specific challenges:
- Amazon moves inventory between fulfillment centers without seller approval
- Sellers may have nexus in states where they’ve never made a sale
- Inventory reports can lag behind actual product movements
- The seller, not Amazon, is responsible for sales tax compliance on their own sales
What you can do:
- Request regular inventory location reports from all fulfillment providers
- Build a process to reconcile inventory locations with your nexus tracking
- Review consignment agreements to understand where products are held
- If using Amazon FBA, download inventory placement reports monthly and update your nexus analysis
The fix here is about information flow. Your tax team needs to know where inventory is stored, and that information needs to come from operations, logistics, and any third-party partners who handle your products.
Risk 5: Remote Employees and Home Offices Creating Unexpected Nexus
The shift to remote work created a wave of new nexus questions that many businesses are still sorting out. If you have employees working from home in states where you don’t have an office, you may have created nexus without realizing it.
This isn’t theoretical. States have been clear that remote employees can create physical presence nexus, and they’re actively auditing businesses that haven’t registered in states where their employees live.
The basic rule: An employee working in a state, even from their home, can establish nexus for their employer. This applies to full-time employees, part-time employees, and in some cases, independent contractors.
What makes this complicated in 2026:
- Employees move without always notifying HR
- Temporary relocations during COVID became permanent
- Hiring remote workers in new states has become standard practice
- Some states have de minimis thresholds; others don’t
A scenario we see often: A company hires a remote customer service representative in a new state. HR processes the paperwork, but nobody notifies the tax team. The employee works from home for two years before an audit reveals the company has had nexus in that state the entire time.
Questions to ask across your organization:
- Do we have a process for HR to notify finance when employees are hired in new states?
- Are we tracking employee relocations, even temporary ones?
- Have we evaluated which states consider remote employees to create nexus?
- Do our independent contractor agreements include location reporting?
Some states have provided relief. A few states have created temporary or permanent safe harbors for remote workers, particularly for employees who relocated during the pandemic. But these provisions vary widely, and many have expired or been modified.
Building a sustainable process:
- Add nexus notification to your new hire onboarding workflow
- Create a quarterly reconciliation between HR records and your nexus tracking
- Review contractor locations, especially for long-term engagements
- Document any safe harbor provisions you’re relying on
The goal is to make sure your tax team knows where your people are working. In a remote-first environment, that requires intentional communication between HR, operations, and finance.
How to Identify Exposure Before an Auditor Does
The five risks above share a common thread: they create liability that often isn’t discovered until an audit. By then, you’re dealing with back taxes, penalties, and interest that could have been avoided with earlier detection.
Here’s the good news: you can find these issues before an auditor does. It takes some coordination across departments, but the process isn’t complicated.
Start With a Cross-Functional Review
Sales tax compliance can’t live entirely within the tax department. The activities that create nexus happen in operations, sales, HR, and logistics. A quarterly review that brings these teams together can surface issues before they become problems.
Topics to cover in a cross-functional review:
- New states where employees have traveled for customer-facing work
- Changes in inventory storage or fulfillment arrangements
- New remote employees or employee relocations
- Leasing or rental agreements with multistate implications
- Consulting or training services performed at client sites
Build Simple Reporting Triggers
You don’t need complex systems to track nexus-creating activities. Simple triggers built into existing workflows can provide the visibility your tax team needs.
Examples of effective triggers:
- Travel approval forms that ask whether the trip involves customer-facing work
- New hire checklists that include tax team notification
- Vendor onboarding that captures fulfillment and storage locations
- Contract review processes that flag leasing or service arrangements
Conduct a Nexus Health Check
If you haven’t reviewed your nexus footprint recently, now is a good time. A comprehensive nexus study looks at all the ways your business might have created obligations, not just economic thresholds.
A nexus health check typically includes:
- Review of employee and contractor locations
- Analysis of inventory and fulfillment arrangements
- Evaluation of service delivery models
- Assessment of leasing and rental activities
- Comparison of current registrations against identified nexus
Know When to Bring in Expert Support
Some businesses can manage multistate compliance in-house. Others benefit from expert guidance, especially when they’re dealing with complex fact patterns or potential past liability.
You might benefit from expert help when:
- You’ve discovered nexus in states where you haven’t been filing
- Your business model involves significant physical presence activities
- You’re preparing for a transaction that requires clean compliance
- An audit has raised questions about your nexus footprint
- You need to evaluate Voluntary Disclosure Agreements (VDAs) to address past liability
At The Sales Tax People, we start every engagement by understanding your specific situation. Our “What’s Next” call is a free consultation where we assess your needs, answer your questions, and help you understand your options. No pressure, no commitment. Just a conversation to help you figure out what makes sense for your business.
Take Control Before a State Auditor Does It for You
The multistate sales tax risks we’ve covered aren’t edge cases. They’re happening right now in businesses like yours, often without anyone realizing until an audit letter arrives. On-site installations, consulting visits, leasing arrangements, third-party fulfillment, and remote employees are all creating unexpected filing obligations that compound over time.
Here’s the reality: the longer these gaps go unaddressed, the more expensive they become. Back taxes, penalties, and interest add up quickly. A $50,000 exposure today can become a $150,000 problem in three years.
But you don’t have to wait for an auditor to tell you where you stand.
Your next steps:
- Schedule a cross-functional meeting this month. Bring together tax, operations, HR, and logistics to review the five risk areas outlined above. Even a 30-minute conversation can surface issues you didn’t know existed.
- Build one simple reporting trigger. Pick the risk area most relevant to your business and create a notification process. Travel approvals, new hire checklists, or inventory location reports can all provide the visibility your tax team needs.
- Evaluate your current nexus footprint. If it’s been more than a year since you’ve reviewed where you have obligations, now is the time. Compare your registrations against your actual business activities.
- Talk to someone who does this every day. If you’ve discovered potential exposure, or if you’re not sure where to start, a conversation with a sales tax expert can give you clarity fast.
At The Sales Tax People, we help businesses identify their nexus footprint, understand their options, and build a path forward. Our approach always starts with listening to your specific situation, not pushing a one-size-fits-all solution.
Curious what your next best step is? Schedule a free “What’s Next” consultation with our team. We’ll assess your needs, answer your questions, and help you understand what makes sense for your business. No fees, no pressure, no commitment. Just a straightforward conversation about where you stand and what you can do about it.
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