For tax advisers and family offices
Your clients cross borders. Make sure they do not cross a threshold without knowing.
Umbral counts each client's days of presence against the tax residence rules of every country, warns before the count becomes a problem and leaves a chain of evidence ready for the accountant or for an audit.
Each country's rule, not just 183 days
Calendar year, rolling 365-day or twelve-month windows, the US weighted substantial presence test and the UK statutory test. The rule is cited on every card.
Immutable log and fingerprinted evidence
Every stay created, corrected or deleted is recorded with date and author. Every passport stamp or boarding pass is stored with its SHA-256 fingerprint.
Verifiable reports
Every issued report carries a fingerprint and a public address to confirm the document was not altered. The first thing an audit asks for.
Plan trips before they happen
Answer in the meeting: if the client flies to Madrid in December, which threshold is crossed and on what day? Without touching the official count.
Try it without an account
The public calculators run the same engine as the workspace. Add stays and future trips and see when each threshold would be crossed.