Rolling Window Explorer — FEIE 365/366-Day Compliance Visualizer

See how your 330-day FEIE qualification shifts day-by-day across any period. Plan trips, avoid surprises, and file with confidence.

The Rolling Window Explorer lets U.S. expats and remote workers visualize FEIE eligibility across 365-day and 366-day windows simultaneously. Animate through time, spot risky dates, and understand your most conservative (worst-case) compliance in seconds. Try it in Playground Mode (no account required), then sign in to save scenarios, export reports, and share with your CPA.

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Playground requires no account • Full app requires sign-in

Key Benefits & Features

Everything you need to visualize and plan your FEIE compliance with confidence

Dual 365/366-Day Analysis: Automatically compares standard and leap-year windows and highlights the worst-case status so you never overestimate eligibility.
Day-by-Day Timeline & Slider: Scrub or auto-play through your chosen period to see US days used, days remaining, and pass/fail status for each date.
Visual Risk Map: Color-coded timeline (green/yellow/red) surfaces knife-edge days where travel changes your outcome.
What-If Planning: Add hypothetical trips and instantly see how they impact FEIE compliance before you book.
Summary Stats for Decisions: See peak U.S. day usage, minimum days remaining, and other rollup metrics to plan safely.
Save, Export, Share (Pro): Save scenarios to your account, export PDF/CSV, and share read-only links with your CPA or employer reviewers.

How It Works

1
Pick a date range
Select your exploration period (e.g., last 12–18 months or any custom period)
2
Animate across days to see eligibility change
Use the timeline slider or auto-play to watch your compliance status evolve
3
Model trips to test outcomes
Add hypothetical trips to see the impact before you travel
4
Upgrade to Pro for exports
Export audit-ready evidence and share securely with your CPA

Use Cases

Nina - Digital Nomad

Nina splits time between Mexico and Europe. She uses the Explorer weekly to ensure upcoming U.S. visits won't push her below 330 full days abroad.

Omar - Corporate Expat

Omar's employer sends him stateside quarterly. He models each trip to confirm he'll still qualify for FEIE, then exports a summary for his CPA.

Jules - First-Year Expat

Jules moved abroad mid-year. With the Explorer, they pinpoint the optimal 12-month period where they cross the 330-day mark earliest.

Priya - Tax Pro (CPA)

Priya reviews client timelines with the Explorer's conservative view and requests Pro exports to attach to Form 2555 files.

Tiers & Access

Playground

Try the Rolling Window Explorer free. Client-only, local data, capped to 365-day range; no save/export/share.

Try Playground

Free (logged in)

Use the full route with saved scenarios. Limits on range/history; exports & share links are Pro features.

Open Full App

Pro

Unlimited range/history, PDF/CSV exports, CPA share links, saved what-ifs, and priority calculations.

View Pricing

Frequently Asked Questions

Does the Explorer handle leap years?: Yes. It calculates both 365-day and 366-day windows and shows the more conservative (worst-case) result.
Is Playground private?: Yes. Playground uses localStorage and never sends your data to our servers.
What do I need for FEIE?: FEIE under the physical presence test generally requires 330 full days outside the U.S. in any 12-month period, plus other criteria (e.g., tax home). Consult your tax advisor.
Can I export for my CPA?: Yes, with Pro you can export PDF/CSV and share read-only links.

Ready to explore your compliance?

Try the Rolling Window Explorer free in Playground mode, then upgrade for unlimited features.

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