Unsure where you owe sales or use tax
Run Your Nexus Risk CheckCalculate exactly when you crossed a state’s economic nexus threshold.
State specific rules. Rolling 12 month logic. Marketplace inclusion supported.
A nexus threshold calculator determines the exact month your sales or transaction activity exceeded a state’s Economic Nexus threshold.
The calculator applies:
This allows you to determine when registration became legally required.
Upload or input monthly sales by state.
Apply the correct state threshold rules.
Run rolling 12 month or calendar year tests.
Identify the first month the threshold was exceeded.
Determine recommended registration timing.
The output shows the exact trigger month, not just annual totals.
Most states use a 100,000 dollar revenue threshold. Review Economic Nexus by State to compare threshold models.
Some states also apply:
High volume sellers with low order value often trigger transaction thresholds first. For transaction specific tracking see Rolling 12 Month Nexus Tracker.
In rolling states, sales are evaluated over the prior 12 consecutive months at any given time.
Example: If sales from September through August exceed 100,000 dollars, nexus is triggered in August.
Annual spreadsheets often miss mid year trigger events. This calculator applies dynamic month by month testing. Once a trigger month is identified, evaluate timing using Nexus Registration Readiness Tool.
Some states include marketplace sales when calculating thresholds. Others exclude them.
The calculator:
Review Marketplace Nexus for facilitator law context. Use Marketplace Nexus Tracker for ongoing platform monitoring. For executive level reporting, access the State by State Nexus Report.
Once the calculator identifies a trigger month:
If nexus was triggered in a prior period, historical liability may exist.
If thresholds were exceeded historically, calculate back exposure with Back Sales Tax Calculator.
A proper threshold calculator removes guesswork.
If you are unsure when nexus was created, calculate it precisely.
Apply correct state rules. Identify trigger dates. Register with clarity.