Direct tax compliance for your business — equity, payroll registration, permanent establishment, and relocation. Plus filing and advisory for your employees, offered as a benefit.
Equity Compensation
Sync CartaTracks vesting, exercise, and sale events across jurisdictions, flags trailing-liability and social-tax issues before payroll runs.
Vesting next 30 days
$2.4M
across 11 employees · 6 jurisdictions
Withholding exposure
$316K
$184K requires Spanish social security
1042-S filings due
8
Q2 deadline: April 30
Upcoming equity events
Big Four mobility memos cost $5K–$50K and take six weeks. Carta tracks grants but not mobility tax. Deel runs payroll but stops short of advisory. Agentax handles equity mobility, permanent establishment risk, and per-employee filing on one platform.
Big Four
Deloitte · PwC · EY · KPMG
Agentax
AI-Native B2B
Equity mobility
Cross-border vests, exercises, sales
Permanent establishment risk
Corporate exposure from senior hires
Per-employee filing
1040 + FEIE/FTC + FBAR
Turnaround
From trigger to deliverable
Everything they cover — we cover too
Equity comp tracking
RSU · NSO · ISO · ESPP
PE risk monitoring
OECD safe harbor + thresholds
Employee tax benefit
Filing + advisory included
30+ jurisdiction coverage
Treaty + local authority
Every salary, bonus, equity vest, and option exercise paid abroad triggers tax — equity comp reporting to HMRC, Permanent Establishment risk in the Netherlands, social security in Spain. Big 4 fees today: $3,000–8,000 per employee per year.
Your international employees face US expat filing, treaty elections, equity exercise planning, and FBAR/FATCA — with nowhere to turn. Deel handles payroll. Sphere handles sales tax. Nobody handles the direct tax triggered by your people.
You manage compliance. Your employees get expert tax support as a benefit. One platform, data flowing both ways.
Everything we do is driven by where your employees are. Each pillar opens with why the tax is owed — then what we do about it.
Why tax is owed: every RSU vest, NSO/ISO exercise, and ESPP purchase is a taxable event in the country where the employee works. We handle cross-border sourcing, employer reporting (HMRC share schemes, Dutch Box 1), withholding, and AMT modeling.
Why tax is owed: employing someone in a country registers you as an employer there, with ongoing withholding and filing obligations. We handle local registration, social security coordination, totalization elections, and annual employer returns.
Why tax is owed: your employees' work abroad can make your company taxable on profits in their country — even without a subsidiary. We assess exposure by country using OECD safe harbor rules, monitor thresholds, and advise on structuring.
Why tax is owed: when an employee moves, their residency, your withholding, and both sides' filing obligations all change. We handle split-year filing, treaty tie-breakers, state departure, and new-country employer setup.
Why tax is owed: your international employees owe US income tax on what you pay them — navigating FEIE, FTC, treaty elections, and FBAR is on them. We file their return, write advisory memos, and handle equity planning — offered as a benefit.
You pay per employee per year. They get filing, advisory memos, equity exercise planning, and FBAR/FATCA handled at no cost to them — a benefit your international team actually needs.
Complete return preparation — 1040, FEIE/FTC optimization, equity comp reporting, FBAR/FATCA. AI-powered with licensed professional review. From $250 per employee.
Before your employees exercise options or sell RSUs, they get jurisdiction-specific guidance on tax impact, optimal timing, AMT exposure, and treaty relief.
Situation-specific analysis with authoritative citations. Treaty optimization, relocation tax impact, foreign pension treatment, and compliance obligations.
Extension filing, FBAR, FATCA, treaty disclosures — deadlines tracked and obligations flagged proactively so your employees never miss a filing.
Employees vest US RSUs while working in London or Amsterdam. You need to know the withholding obligations in each jurisdiction. They need to understand their personal tax exposure.
An employee exercises ISOs from abroad. Your company has employer reporting obligations to HMRC or the local tax authority. The employee needs to model AMT and local tax treatment.
An employee moves from NYC to London mid-year. You need to handle payroll registration, social security coordination, and potential Permanent Establishment implications. They need split-year filing and FEIE planning.
Your VP of Sales is based in Amsterdam and signs contracts on behalf of the company. This may create a permanent establishment in the Netherlands — triggering Dutch corporate tax obligations.
HMRC requires annual share scheme returns for all UK employees with equity. Missing the deadline means penalties. We track the filing calendar across every jurisdiction.
Tax season arrives and your international employees need more than a domestic return — FEIE, FTC, treaty elections, foreign reporting requirements. We handle it as part of their benefit.
We understand your employee locations, equity structures, and employer obligations across jurisdictions. We assess your current compliance posture and identify gaps.
Equity comp reporting, Permanent Establishment risk monitoring, and employer filing obligations are tracked on the platform. You get alerts when something needs action.
Employees access tax filing and advisory through the platform — at no cost to them. Every output is reviewed by a licensed tax professional.
We'd like to understand your team, your jurisdictions, and your compliance needs. Start with a conversation.