Guides

• Economic Nexus Thresholds by State (2026) — Every state's remote-seller sales-tax threshold for 2026: the dollar amount, any transaction count, the period measured and whether marketplace sales count.
• Which States Still Have a 200-Transaction Nexus Test? — Many states have dropped the 200-transaction test, including Illinois (January 1, 2026) and Kentucky (August 1, 2026). Here's who still uses it and why it matters for small orders.
• The $500,000 States: California, Texas and New York — California, Texas and New York use $500,000 thresholds, but each measures differently: California 'exceeds', Texas a trailing 12 months, New York four quarters plus 100 sales.
• Do Marketplace Sales Count Toward Your Nexus Threshold? — Some states count Amazon, Etsy and eBay sales toward a seller's own economic nexus threshold and some don't. The difference can decide whether you must register.
• “Exceeds $100,000” vs “$100,000 or More”: Why It Matters — Washington, California, Mississippi and New York use 'exceeds'. Hitting the threshold exactly isn't enough there, but it is in most other states.

Tools

• Economic nexus calculator for every state, from your orders file
• Shopify sales by state, checked against every nexus threshold
• Selling on Amazon and your own site? Check nexus per state
• A sales-tax nexus tracker built from your own orders

Comparisons

• Economic nexus checkers: what they cost and what they do
• Check economic nexus without a sales tax subscription
• A nexus check from your own orders, with no contact form