Multi-State Tax Nexus & Remote Work: What You Owe

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The remote work shift that started in 2020 permanently changed the tax landscape for businesses with distributed teams. What many companies still don't fully appreciate is that every employee you hire — regardless of where they're located — creates a web of tax obligations in their home state.

Here's what that actually means for your business.

Payroll Tax Registration

The moment you have an employee working from a state, you're generally required to register as an employer in that state, withhold state income tax from their wages, and pay state unemployment insurance (SUI). This isn't optional, and the penalties for non-compliance — operating as an unregistered employer — range from fines to personal liability for business owners.

For a company with employees in five states, that's five separate payroll tax registrations, five separate quarterly filings, and five separate annual reconciliations. Many businesses discover this obligation only when a state sends them a notice — often with back penalties attached.

Income Tax Nexus

Beyond payroll, having employees in a state often creates income tax nexus — meaning you're now required to file a state corporate income tax return there and pay taxes on the portion of income attributable to that state.

This is calculated using apportionment formulas, which vary by state. Most states use a combination of property, payroll, and sales factors. Some states have moved to single-sales-factor apportionment. Understanding how your income is apportioned — and optimizing your entity structure accordingly — can meaningfully reduce your overall state tax burden.

Sales Tax Nexus

Sales tax is its own universe. Since the Supreme Court's 2018 South Dakota v. Wayfair decision, economic nexus standards mean that even without physical presence in a state, you can be required to collect and remit sales tax if you exceed that state's revenue or transaction thresholds. For most states, the threshold is $100,000 in sales or 200 transactions annually.

If you sell products or taxable services across state lines, you almost certainly have sales tax obligations you may not be meeting. The exposure here is significant — states are aggressively auditing for this.

What To Do

The first step is a nexus analysis: a comprehensive review of where you have employees, where you're generating revenue, and what filing obligations those activities create. This isn't a one-time exercise — it should be updated any time you hire in a new state or enter a new market.

The businesses that handle this proactively avoid the penalties and back-tax bills that come with discovery. The ones that don't often face years of catch-up filings and interest charges that far exceed what proper compliance would have cost.

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