When you trigger economic nexus, you generally have a legal obligation to register, collect, and remit sales tax. The challenge is that every state defines its threshold differently. Some states use a dollar amount, some use a transaction count, and some have changed their rules over time.
Missing a threshold can create penalties, back taxes, and interest that affect your margins. This guide explains how to think about nexus in 2026 and how to build a process that keeps pace with changing state rules.
What is economic nexus?
Economic nexus is a tax obligation created by a business’s sales activity in a state, even when the business has no physical location there. A state may measure gross sales, taxable sales, transactions, or a combination of those measures.
The threshold is usually reached when the first applicable test is met. A business should review the state’s current definition, measurement period, exclusions, and registration deadline before deciding whether it must collect tax.
Why state-by-state monitoring matters
There is no single nationwide threshold. Rules can differ by:
- Sales or transaction thresholds.
- Whether marketplace sales are included.
- The measurement period used.
- Whether exempt or wholesale sales count.
- The date collection must begin after a threshold is reached.
- Local registration and filing requirements.
Thresholds and taxability rules can change. A spreadsheet that is correct today can become stale after a legislative or administrative update.
A practical nexus review process
- Collect all sales channels. Include direct ecommerce, marketplaces, subscriptions, invoices, and other taxable revenue sources.
- Separate the relevant transaction types. Identify taxable, exempt, wholesale, and marketplace-facilitated sales.
- Measure activity by state. Compare the correct sales and transaction totals with each state’s current threshold.
- Review physical presence. Inventory, employees, contractors, offices, and fulfillment arrangements may create an obligation independently of economic nexus.
- Document the trigger date. Record when the threshold was reached and when registration and collection should begin.
- Create an ongoing monitoring workflow. Recheck activity on a schedule and keep evidence of the rules used.
What happens after you cross a threshold?
Crossing a threshold is the start of a compliance workflow, not the end of the analysis. Businesses may need to register, configure tax collection, update product taxability, file returns, and remit what was collected.
If a business should have registered or collected tax in an earlier period, it should assess the historical exposure before contacting a state. A Voluntary Disclosure Agreement may be an option in some jurisdictions when the state has not already initiated contact.
Use current state guidance
State thresholds are fact-specific and can change. Review the applicable state’s current guidance and confirm whether marketplace activity, exempt sales, transactions, or other exclusions affect the calculation.
Kintsugi’s state sales tax guides provide a starting point for reviewing state-specific rules:
- Alabama sales tax guide
- California sales tax guide
- New York sales tax guide
- Texas sales tax guide
- Washington sales tax guide
Automate nexus monitoring with Kintsugi
Kintsugi monitors sales activity against jurisdiction thresholds and alerts finance teams when exposure changes. It also connects monitoring with calculation, registration, filing, and remittance so the response does not depend on a spreadsheet or a manual state-portal review.
Use Kintsugi to see where you have exposure, understand which obligations need attention, and build a repeatable sales tax compliance process as your business grows.
