Know where
you stand.
Track your days in every country. See exactly how many days you have left before a tax residency rule triggers — before you book your next flight.
Your rule status · Today
What Residia tracks
Every rule. Not just days.
Most trackers count days spent. Residia tracks the rules — showing you how many days you have left before a threshold triggers and what happens when it does.
Rule-aware tracking
Italy 183-day, UK 90-day SRT, Spain residency — each rule has its own logic. Residia knows all of them.
Scenario planning
Add a hypothetical trip and see how it changes your rule status before you commit to the ticket.
Threshold alerts
See warnings before you cross a limit — not after. Designed for people who can't afford to miscalculate.
Household & multi-person
Track a couple or whole family together. Each traveler gets their own rule set and day count.
Multi-country
Track multiple countries simultaneously — perfect for complex multi-base situations.
API for AI agents
Query residency status, check thresholds, and plan travel scenarios programmatically. Built to integrate with AI workflows.
How it works
Three steps to clarity.
No complex setup. Log your stays, watch your rules, plan your next move.
Log your stays
Add the countries you've visited with entry and exit dates. As many as you need — past and future.
Pick your rules
Select which tax residency rules apply to you — Italy 183-day, UK 90-day SRT, Spain residency, and more.
See where you stand
Residia runs the calculations and shows your current status, days remaining, and any rules at risk.