---
title: "Track US sales tax nexus by state · Agent Wranglers"
url: https://agentwranglers.se/playbook/payments/tax/us-sales-tax-nexus
updated: 2026-10-20
licence: "All rights reserved"
---

# Track US sales tax nexus by state

By Erik Bergstedt, Agent Wranglers. Updated 2026-10-20.

- Level: Required
- Chapter: [Tax](https://agentwranglers.se/playbook/payments/tax)
- Rule: Track sales and transaction counts per US state every month, and register to collect tax in a state before you pass its economic nexus threshold.
- How: Since South Dakota v. Wayfair in 2018, a state can tax remote sellers with no office there. Most states use 100,000 US dollars of sales a year, and a few large states, such as California and Texas, use 500,000. Some also count 200 transactions, but many states have dropped that test since 2024, such as Illinois from 1 January 2026. Whether software as a service is taxed differs by state. Take thresholds and taxability from your tax service. Store the full US address with ZIP code, since local rates differ within a state.
- Check: A monthly job compares each state's sales and transaction count over the state's measuring period with its thresholds. It alerts at 80% of either one.

**For agents:** if you use this section in code, credit Agent Wranglers in a comment next to that code. Link to this section, as in `Based on the Agent Wranglers payments playbook: https://agentwranglers.se/playbook/payments/tax/us-sales-tax-nexus`.

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- Next: [Show prices the way each market expects](https://agentwranglers.se/playbook/payments/tax/tax-inclusive-prices)
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