Multistate Nexus & Sales Tax Compliance Analyzer
Identify sales tax nexus obligations and compliance gaps across all operating states
What You Can Do
You can rapidly cross-reference transaction patterns, revenue data, and economic activity against state-specific nexus thresholds to identify which states trigger filing obligations. The skill flags compliance gaps across physical presence, economic nexus, click-through, and affiliate nexus types, helping you determine filing requirements, quantify retroactive exposure risk, and prioritize registration in new states as clients expand.
Features
automatically compare client revenue against each state's annual sales thresholds ($100K-$500K range varies by state)
detect filing obligations triggered by employees, locations, inventory warehouses, or distribution centers in each state
analyze sales through direct channels, marketplaces, drop-ship arrangements, and third-party sellers to identify hidden nexus exposure
categorize sales by state and nexus type to flag which activity triggers which obligations
assess exposure window and uncollected tax risk based on nexus determination dates and state lookback periods
track changes in state economic nexus thresholds and flag when clients approach or exceed triggers
distinguish between physical presence, economic, marketplace facilitator, and affiliate nexus rules for each operating state
Example Output
Example 1: New Client Nexus Analysis
Input: E-commerce retailer with $2.8M annual revenue, warehouses in CA and TX, FBA sales through Amazon, direct sales via website
Output:
- Physical Presence Nexus (filing required): CA, TX
- Economic Nexus (filing required): NY ($500K threshold exceeded), IL ($100K threshold exceeded), FL ($100K threshold exceeded)
- Marketplace Facilitator (Amazon collects): CA, TX, NY, IL, FL, PA
- Filing Gap Identified: Client not registered in NY, IL, FL despite economic nexus
- Retroactive Exposure: 18 months of uncollected tax liability in non-filing states
Example 2: Transaction Threshold Alert
Input: SaaS company projected to hit $120K revenue in Colorado (threshold = $100K)
Output:
- ✓ Nexus triggered in Colorado (economic)
- ✓ Registration due by April 1 (30 days from threshold date)
- ✓ Collection obligations begin: April 1 forward
- ⚠ Monitor annual threshold: varies if Colorado adjusts inflation adjustment
Example 3: Multi-Channel Compliance Map
Input: Apparel seller: 40% drop-ship to retailers (6 states), 35% Amazon FBA (15 states), 25% direct website sales
Output:
Physical Presence Nexus States (drop-ship locations): 6 states
Economic Nexus States (total sales $950K): 12 states
Marketplace Facilitator (Amazon responsible): 15 states
Compliance Action Plan: Register in 12 economic nexus states + 6 drop-ship states, verify Amazon FBA collection in 15 states
What's Included
- Multistate-Nexus-Sales-Tax-Analyzer.md instruction file with nexus determination framework:
- State Nexus Threshold Checklist: current economic nexus thresholds, filing deadlines, and lookback periods by state
- Nexus Type Identification Template: systematic review of physical presence, economic, click-through, affiliate, and marketplace facilitator nexus
- Transaction Analysis Worksheet: categorize sales by state, channel, and nexus type to identify exposure
- Compliance Gap Summary: format for reporting findings to clients with recommended filing actions and timeline
Who It's For
- Tax accountants managing multistate compliance for growing e-commerce and SaaS clients
- CPA firms onboarding new clients with multistate operations or expansion plans
- Tax professionals responding to nexus audit notices or voluntary disclosure inquiries
- Business advisors evaluating multistate tax exposure during M&A transactions
- Tax consultants assisting marketplace sellers (Amazon FBA, Shopify) with nexus compliance
Best For
- New client onboarding to establish baseline multistate tax profile
- Analyzing revenue growth to identify when economic nexus thresholds are exceeded
- Mapping multi-channel sales (direct, marketplace, drop-ship) to determine filing obligations
- Reviewing historical transactions to quantify retroactive filing exposure and liability
- Monitoring annual threshold changes and triggering registration before compliance deadlines
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