Multistate Sales Tax Nexus Checker
Last updated · Reviewed for accuracy against IRS.gov guidance
Since South Dakota v. Wayfair (2018), states can require you to collect sales tax once your sales into the state pass a threshold. Enter your sales and transactions into each state with that state's published threshold to see where you may have economic nexus. Thresholds aren't prefilled — each state sets its own.
Possible nexus: State A, State B. Confirm each state's current rules before registering.
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Get a free reviewWhere thresholds come from
In South Dakota v. Wayfair the Court upheld a law using $100,000 in sales or 200 transactions. States have since set and changed their own thresholds; the Multistate Tax Commission and each state agency publish the current rules.
If a state is flagged
Read the multistate nexus guide, estimate past exposure, and consider voluntary disclosure before registering. The free business tax relief assessment has a multistate option.
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Start the calculatorFrequently asked questions
What is economic nexus?
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A state's rule that out-of-state sellers must collect its sales tax once their sales into the state pass a threshold, even with no physical presence. The Supreme Court allowed this in South Dakota v. Wayfair (2018).
Are thresholds the same in every state?
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No. Dollar amounts, whether a transaction count applies, which sales count and the measuring period all vary by state. That's why this tool asks you to enter each state's threshold.
Do marketplace sales count?
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Some states count sales made through marketplaces toward your threshold even though the marketplace collects the tax; others exclude them.
What if I've already passed a threshold?
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You may owe tax for past sales. Voluntary disclosure is often the safest way to resolve it before the state contacts you.
Does physical presence still create nexus?
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Yes. Employees, inventory or property in a state can create nexus regardless of sales volume.
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TaxSettlementCalculator.com is not a tax firm, law firm, CPA, or government agency and is not affiliated with the IRS or any state tax agency. Estimates are for educational purposes only and are not tax, legal, or financial advice. Results vary based on individual circumstances, and no outcome is guaranteed. We connect users with independent tax relief professionals.