Sales Tax Nexus Threshold Monitor

The monitor compares each state row against a 2026 planning preset for economic nexus. Some states use a sales-only threshold, such as $100,000 or $500,000 in qualifying receipts. Others still use a sales-or-transaction test, where crossing either the dollar amount or transaction count can require registration. A smaller group uses AND logic, where both the sales and transaction tests must be satisfied.

The calculator keeps direct sales and marketplace sales separate because marketplace facilitator treatment is one of the biggest traps in multi-state sales tax compliance. The default setting follows the state preset. You can override it to include or exclude marketplace sales everywhere for sensitivity testing, but the final answer should come from the specific state's guidance and your platform reports.

Results are grouped into triggered, watchlist, below-threshold, local-threshold, and no broad statewide tax categories. A triggered state is not an instruction to start collecting immediately; it is a signal to verify registration timing, product taxability, marketplace collection, return frequency, and collection start date.

Nexus is about obligation, not just tax rate

A sales tax rate tells you how much tax applies to a transaction. Nexus answers a different question: whether your business has enough connection to a state to be responsible for registration, collection, filing, and remittance. After the Supreme Court's Wayfair decision, states may require remote sellers to collect sales tax based on economic activity, even without an office, employee, or warehouse in the state.

Most thresholds look simple at first glance, but the details are not uniform. One state may count gross sales. Another may count retail sales. Another may count only taxable sales. One state may include marketplace-facilitated sales in the seller threshold while another excludes them when the marketplace provider collects. That is why a useful monitor needs to separate channels and show the sales base behind the number.

The three main threshold patterns

Sales-only states trigger review when qualifying sales or receipts cross the dollar threshold. Sales-or-transaction states can trigger from revenue or order count. AND-rule states require both tests, which can be important for high-ticket sellers with fewer orders or low-order-value sellers with many transactions.

• Sales-only: common for states that removed transaction thresholds, including states that now use a $100,000 or $500,000 sales standard.
• Sales or transactions: still important where 200 transactions can trigger review even if the sales amount is below the dollar threshold.
• Sales and transactions: requires both thresholds, so one threshold alone may place the state on watchlist rather than triggered.

Marketplace sales need their own line

Marketplace laws reduced collection burden for many sellers, but they did not eliminate nexus analysis. In some states, sales through a marketplace still count toward your individual economic nexus threshold even when the marketplace collects and remits tax. In other states, marketplace sales are excluded for individual seller threshold testing. Keep marketplace reports separate by destination state so the answer can be reviewed quickly when a state crosses the watchlist line.

What to do when a state is triggered

Before collecting tax, verify the state's current registration deadline, collection start date, taxable-products rules, marketplace treatment, return filing frequency, and sourcing rules. Some states require collection on the next transaction. Others allow a first-of-month start after a short delay. Some measure the current calendar year, some use prior calendar year, some use prior twelve months, and New York uses the immediately preceding four sales tax quarters.

After nexus is verified, open the state calculator for the destination jurisdiction. For example, use the Texas sales tax calculator or California sales tax calculator to estimate transaction tax after the registration question is clear.

Data quality matters more than the dashboard

A nexus monitor is only as good as the transaction data feeding it. Store customer destination state, sale date, channel, marketplace name, taxability, exemption status, resale status, refunded amounts, and transaction count. For companies near multiple thresholds, monthly review is usually more practical than waiting until year-end.

Source note: Planning presets are compiled from the Sales Tax Institute May 4, 2026 economic nexus chart, Streamlined Sales Tax remote-seller guidance, and selected state revenue agency pages. Verify the state before registering, collecting, filing, or deregistering.

Keep the research moving with Texas Sales Tax Calculator, California Sales Tax Calculator, Florida Sales Tax Calculator, and New York Sales Tax Calculator.