Unsure where you owe sales or use tax
Run Your Nexus Risk CheckKnow exactly when nexus triggers a legal registration requirement in each state.
State specific nexus rules. Rolling threshold tracking. Clear registration timing.
You must register for sales tax when you establish nexus in a state.
Nexus is created through:
Registration is generally required immediately after nexus is established or within the next reporting period depending on the state.
Delaying registration after nexus is triggered may result in back taxes, penalties, and interest.
If you exceed a state revenue or transaction threshold, registration is required.
Most states require registration:
Each state defines:
Because thresholds and measurement periods vary by jurisdiction, we recommend reviewing our Economic Nexus by State breakdown along with the full Economic Nexus Thresholds by State guide for detailed comparisons.
Physical presence generally requires registration as soon as it exists.
Common physical nexus triggers include:
If you are new to multistate sales tax, start with our full Economic Nexus guide to understand how revenue thresholds create obligations. You can also review the Sales Tax Nexus overview to see how physical and economic triggers work together.
Remember that revenue is only one trigger. Inventory, remote employees, and warehouses may create physical nexus even before thresholds are exceeded. See Physical vs Economic Nexus for a side by side comparison.
However, registration may still be required if:
Marketplace sellers should also review our Marketplace Nexus guide to understand how facilitator laws impact economic threshold calculations. Track multichannel sales using Marketplace Nexus Tracker.
If nexus was created in a prior period and registration did not occur:
You may need to evaluate:
If you believe nexus may have been triggered in prior periods, use the Sales Tax Liability Estimator and Back Sales Tax Calculator to evaluate potential exposure before registering. Assess exposure using Nexus Risk Score Tool.
How States Determine Your Registration Date
Failure to apply correct measurement periods is a common mistake. Use Rolling 12 Month Nexus Tracker to calculate precise trigger timing.
Registration should be data driven.
Once registered you must:
Registration does not eliminate prior liability if nexus existed earlier. Continuous monitoring is required after registration. Instead of manually testing spreadsheets, you can automate multistate monitoring with our Economic Nexus Monitoring Software, which applies rolling 12 month calculations and state specific threshold rules in real time.
Evaluate both physical and economic nexus.
Calculate exact trigger dates.
Assess potential historical liability.
Register in required states.
Implement continuous monitoring.
Identify nexus. Confirm timing. Register with clarity.