State Tax Nexus for Manufacturers: Triggers & Compliance

Selling into a new state feels like growth — and it is. But it also comes with a tax obligation most manufacturing owners don't see coming. According to a 2023 survey by the Tax Foundation, over 40% of small and mid-sized manufacturers were unaware they had created tax obligations in states where they had no physical presence. That number is rising fast, especially after the Supreme Court's 2018 South Dakota v. Wayfair ruling changed everything about how states define who owes them taxes. This blog breaks down what state tax nexus actually means, what triggers it for manufacturers specifically, and the practical steps you need to take to stay compliant — without letting it blindside your cash flow.

What Is State Tax Nexus — and Why Manufacturers Need to Understand It

Nexus is the legal connection between your business and a state that requires you to collect and remit that state's taxes. Think of it as the state's way of saying: "You're doing enough business here. You owe us."

For decades, nexus was simple. If you had a physical location — a facility, warehouse, or employee — in a state, you had nexus there. Manufacturers with operations in one state and customers in another generally didn't worry about it.

Then Wayfair happened. The Supreme Court ruled that states can impose sales tax obligations on out-of-state sellers based purely on economic activity — no physical presence required. That ruling didn't just affect e-commerce companies. It hit manufacturers hard, especially those selling direct-to-business or direct-to-consumer across state lines.

Now, the question isn't just "where do we have a building?" It's "where do we have customers, employees, inventory, or revenue?" The answer often creates obligations in far more states than most owners expect.

The Two Types of Nexus Manufacturers Need to Know

Not all nexus is the same. There are two main categories, and both can apply to your business at the same time.

Physical Nexus is the traditional kind. It's triggered by a tangible, in-state presence. For manufacturers, that includes:

• A facility or warehouse: Any owned or leased space used for production, storage, or distribution
• Employees or contractors: Sales reps, field technicians, or remote workers living in another state
• Inventory stored at third-party locations: Including Amazon FBA fulfillment centers or third-party logistics providers
• Equipment or property: Machinery, vehicles, or tools regularly used in a state

Economic Nexus is the post-Wayfair standard. Each state sets its own thresholds, but the most common trigger is $100,000 in annual sales or 200 transactions in that state. Once you cross that line, you're on the hook — even if you've never set foot there.

The dangerous combination? Many manufacturers have both types of exposure and don't realize it until a state auditor shows up.

Which Activities Specifically Trigger Nexus for Manufacturers

This is where it gets granular — and where most manufacturers get caught off guard. Some common situations that create nexus without an obvious footprint include:

• Drop shipping to customers in another state on behalf of a distributor
• Attending trade shows or making sales calls in another state, even once or twice a year
• Hiring a remote employee who works from home in a different state
• Using a 3PL (third-party logistics provider) that stores your inventory in their facility
• Licensing intellectual property — patents, trademarks, or proprietary processes — to companies in other states

Each of these creates a nexus exposure that varies by state. Some states have a one-day rule for trade shows. Others trigger nexus the moment an employee's address changes. The rules are not uniform, and that inconsistency is exactly what makes this complicated.

Your financial risk management plan should include a regular nexus review — it's one of the most overlooked financial risks in the industry.

What Taxes Are Actually at Stake?

Nexus doesn't just affect sales tax. That's the piece most people focus on, but the exposure is broader. Here's what can be triggered depending on the state:

• Sales and Use Tax: The most common. If you have nexus, you're generally required to collect sales tax from in-state customers and remit it to the state. Exemptions exist for manufacturers — raw materials, machinery, direct production inputs — but those exemptions must be claimed correctly.
• Income Tax (Corporate or Franchise Tax): Economic presence in a state can also create income tax obligations, requiring you to apportion a portion of your business income to that state and file a return there.
• Payroll Tax: The moment you hire someone who lives and works in another state, you're likely creating payroll tax obligations there.
• Property Tax: Equipment, vehicles, or inventory physically located in another state may be subject to that state's property tax, even if you don't own the real estate.

Understanding the full scope of exposure matters because many manufacturers fix the sales tax issue and miss the income tax filing obligation — which is just as serious.

If you're not sure how all of this flows through your financials, getting from bookkeeping to CFO-level insight is often the turning point where these blind spots get addressed.

How to Conduct a Nexus Review for Your Manufacturing Business

You can't fix what you haven't mapped. A nexus review is a structured process to identify every state where you may have a tax obligation. Here's how to approach it systematically.

Step 1: Map Your Physical Footprint List every state where your business has any physical presence — facilities, warehouses, 3PL partners, employees (including remote), contractors, equipment, or vehicles. Don't assume the obvious ones are the only ones.

Step 2: Pull Your Sales Data by State Run a report showing total revenue and transaction count by customer shipping address for the past 12 to 24 months. Compare this against the economic nexus thresholds for each state where you have material sales volume.

Step 3: Review Your Distribution Channels If you sell through distributors, resellers, or online marketplaces, document where those transactions ship. Inventory stored by a third party on your behalf — even temporarily — may create physical nexus.

Step 4: Identify the Tax Types at Stake For each state where you've identified nexus, determine which tax types apply: sales tax, income tax, payroll tax, or property tax. This step often requires state-specific research or professional guidance.

Step 5: Prioritize by Risk and Revenue Not every exposure is equal. States with higher revenue concentration, mandatory sales tax collection, or aggressive audit programs represent your highest risk. Start remediation there.

Step 6: Determine Voluntary Disclosure Opportunities Most states offer Voluntary Disclosure Agreements (VDAs) that let businesses come forward proactively to register, pay back taxes with limited look-back periods, and avoid penalties. Acting before an audit is almost always better than waiting.

Pairing this review with regular financial health checks for your manufacturing company creates a rhythm of compliance that protects you year over year.

If you're operating in multiple states and aren't sure whether your current accounting setup is capturing nexus exposure accurately, Accounovation works with manufacturing companies to build the financial visibility and compliance infrastructure that prevents costly surprises. Contact us to talk through where your business stands.

How to Stay Compliant Once You've Registered

Identifying nexus is step one. Ongoing compliance is where most businesses stumble because the administrative load is significant and the rules keep changing.

A few core practices that make compliance manageable:

• Register in each nexus state before you start collecting. Collecting sales tax without a valid registration creates its own liability.
• Use tax automation software. Tools like Avalara or TaxJar integrate with most ERP and accounting platforms to calculate, collect, and file automatically. For manufacturers selling across multiple states, this is not optional — it's essential.
• Claim manufacturing exemptions correctly. Most states exempt raw materials and direct production inputs from sales tax — but you need to document it. Keep exemption certificates current and audit-ready.
• Monitor threshold changes. States update their economic nexus thresholds. A state where you didn't have economic nexus last year may cross the threshold this year if your sales grew.
• File returns even when you owe nothing. Some states require zero returns. Failing to file — even with no tax due — triggers penalties.

Proper financial controls inside your accounting function are what make this operational. Without defined workflows and review checkpoints, compliance tasks fall through the cracks.

The Cost of Getting It Wrong

State tax non-compliance isn't just a paperwork issue. The financial exposure can be significant — and it compounds quickly.

Back taxes can stretch back three to ten years depending on the state and whether fraud is alleged. Penalties for failure to register, failure to collect, and failure to file stack on top of each other. Interest accrues from the original due date. And in an audit scenario, the burden of proof often falls on the business to demonstrate it didn't have nexus — not on the state to prove it did.

Beyond the direct tax liability, non-compliance creates risk during due diligence if you're ever looking to sell or raise capital. Buyers and investors will uncover unresolved tax obligations in the discovery process, and it becomes a negotiating liability. For a deeper look at how your sales and use tax compliance posture affects your broader financial risk, it's worth reviewing the full picture.

The businesses that handle this proactively almost always pay less — and sleep better.