Know when you owe sales tax — before each state tells you
NexusMonitor connects to your Square account and automatically tracks your sales against every US state's economic nexus threshold. Get email alerts at 50%, 75%, 90%, and 100% — so you can register on time, not after the fact.
No credit card required. Connects to Square in under 2 minutes.
The nexus problem every growing Square seller faces
Since the 2018 Wayfair ruling, every US state can require you to collect sales tax once you hit their threshold — typically $100K in sales or 200 transactions.
Whether you sell online, in-store, or both, every sale shipped to a different state counts toward that state's nexus threshold. Most Square sellers don't find out they've crossed a threshold until a state tax authority sends a notice.
With 46+ states each having their own economic nexus rules — typically $100K in sales or 200 transactions — tracking this manually in a spreadsheet breaks down fast, especially with Square's multi-location capabilities.
Tax collection tools handle the AFTER — calculating and collecting tax once you're registered. NexusMonitor handles the BEFORE — telling you exactly WHEN you need to register in each new state.
How NexusMonitor works with Square
Connect your account in under 2 minutes. No spreadsheets, no manual data entry.
Connect your Square account
One-click OAuth — just authorize NexusMonitor to read your orders. We only request read-only access. No payment credentials are shared.
Automatic order sync
NexusMonitor pulls your last 12 months of Square orders and aggregates sales by state. Daily syncs keep your data current.
See your nexus map
Your dashboard shows a color-coded US map — green (safe), yellow (approaching), orange (warning), red (exceeded) — for every state.
Get alerts before you owe
Email alerts at 50%, 75%, 90%, and 100% of each state's threshold. You'll never be surprised by a nexus obligation again.
Everything a Square seller needs for nexus compliance
One-click OAuth connect
Authorize NexusMonitor in one click — no API keys or plugins needed.
46+ states monitored
Every state with sales tax, each with its own thresholds and rules.
Daily automatic sync
Orders sync daily via Square's Orders API. Your nexus data is always current.
Interactive nexus map
See your status across all states at a glance on a color-coded US map.
Threshold alerts
Email alerts at 50%, 75%, 90%, and 100% of each state's threshold.
Multi-platform aggregation
Selling on Square AND Shopify? NexusMonitor aggregates sales across all your platforms.
Multi-location support
NexusMonitor syncs orders from all your active US Square locations automatically.
AI-powered support
Ask our chatbot any nexus question — instant answers, 24/7.
Pricing that makes sense for Square sellers
Start free for 14 days. No credit card required. Choose the plan that fits your business.
$19/mo
1 platform connection, top 10 states monitored, email alerts at all thresholds.
Start Free Trial$39/mo
Unlimited platforms, all 46+ states, multi-platform sales aggregation.
Start Free Trial$69/mo
Everything in Growth plus rule change alerts, registration guidance, PDF nexus report export.
Start Free TrialDon't wait for a state tax notice
Connect your Square account to NexusMonitor and know exactly where you stand in every state. Free for 14 days, no credit card required.