The Problem Nobody Sees Coming
Remote Work Created a Multi-State Tax Minefield
The NCSL and the National Taxpayers Union Foundation have both documented the same reality: when employees work across state lines — even temporarily — they trigger a cascade of tax obligations that most employers never see until it's too late. Filing thresholds, withholding rules, reciprocity agreements, and convenience-of-the-employer doctrines vary wildly by state, and the compliance burden falls squarely on the employer.
There are 50 different state tax regimes, each with unique filing, withholding, and nexus rules. 30+ of them require nonresident income tax filings from day one — no safe harbor at all. 7 states enforce convenience-of-the-employer rules that put remote workers at risk of double taxation. The CBO estimated over $100M in nationwide exposure from short-term nonresident obligations alone — and that was before hybrid work became the norm.
Nexus Radar
See Exactly Where Your Exposure Is
The Nexus Radar map gives you a real-time view of workforce presence across every state — overlaid with your registration status, income tax rules, filing thresholds, withholding requirements, and convenience-of-employer flags.
Click any state to see whether your company is registered, the applicable tax rules, and a live presence log filtered to that jurisdiction. Employee headcount clusters are visible at a glance, so you can spot emerging obligations before they crystallize.
Did you know? According to the 2025 ROAM Index, over 30 states still require nonresident income tax filing from the very first day an employee works in-state. A single business trip can trigger compliance obligations.
Location Discrepancy Log
Flag the Gaps Before the State Does
The Location Discrepancy Log cross-references where each employee is officially listed against where presence data shows they're actually working. It surfaces risk-scored discrepancies with full location breakdowns — so your tax team can act on real data, not assumptions.
- Risk scoring — High / Medium / Low classification based on percentage of time spent outside home state and applicable state rules
- Advisory notes — Automated early-warning indicators that reference state-specific withholding triggers and nexus rules
- YTD location breakdown — Visual state-by-state distribution showing exactly where each employee has been working over 30, 90, or all-time windows
Advisory note example: "Damon Rivera is listed as a remote worker based in NM, but presence data shows only 36.67% of work time in that state. Significant time in WA (27%) may trigger withholding or registration obligations."
What Nexus Radar Watches
Continuous Monitoring Across Six Risk Vectors
Nexus Radar isn't a one-time audit — it's a continuous early warning system that correlates workforce presence data against the full landscape of state tax obligations.
Location Discrepancy Detection
Automatically compare employee home-state records against actual presence data. When someone listed in New Mexico is logging 27% of their time in Washington, you need to know before the state does.
Withholding Threshold Alerts
Every state has different rules — some trigger obligations after a single day, others at 14 or 30 days. Nexus Radar tracks days worked per state and alerts you as employees approach filing and withholding safe harbor thresholds.
Convenience of Employer Rule Flags
States like New York, Delaware, and Pennsylvania enforce convenience-of-the-employer rules that can double-tax remote workers assigned to in-state offices. Nexus Radar identifies affected employees automatically.
Corporate Nexus Exposure
A single remote employee can create sufficient nexus to trigger corporate income tax, sales tax collection obligations, and business registration requirements in a new state. We surface these triggers early.
Registration Status Tracking
See which states your company is registered in and which states your workforce presence is creating new obligations — with income tax, filing threshold, withholding, and convenience-of-employer rule details at a glance.
Presence Log Audit Trail
Every check-in, badge scan, and presence signal is logged with timestamp, employee, state, office, and method — giving your tax and compliance teams the evidence trail they need for filings and audits.
Why This Matters Now
The Regulatory Landscape Is Getting Harder, Not Easier
The Patchwork Is Expanding
The NCSL Remote Work Taxation Work Group documented that remote employees working in a state where their employer has no physical presence can trigger personal income tax liability, employer withholding obligations, unemployment insurance requirements, corporate income tax nexus, sales tax collection duties, and business registration requirements — often from a single employee working from their living room. The rules are non-uniform across all 50 states and hundreds of local jurisdictions.
Convenience Rules Create Double Taxation Risk
States including New York, Delaware, Connecticut, New Jersey, Nebraska, Oregon, and Pennsylvania apply some form of "convenience of the employer" doctrine — taxing nonresident remote workers as if they were physically present at the employer's in-state office. For affected employees, this means wages may be taxed by both their home state and their employer's state, with the home state potentially denying a credit for the taxes paid under the convenience rule.
Safe Harbors Are the Exception, Not the Rule
The 2025 ROAM Index from the National Taxpayers Union Foundation found that only a handful of states have adopted the gold-standard 30-day filing and withholding safe harbors. The majority of states still require nonresidents to file a tax return from the very first day they earn income in-state. Only about a fifth of states have entered into any income tax reciprocity agreements. Without real-time visibility into where your workforce is operating, you're navigating this minefield blind.
Stop Discovering Tax Exposure After the Fact
Nexus Radar is currently in development as part of the Atteniv platform. If your organization manages a distributed or hybrid workforce and wants early access to continuous nexus monitoring, we'd like to hear from you.
This is an early-warning indicator tool. Consult your tax advisor for jurisdiction-specific obligations.