residex.ioEvery trip accounted forIrish Tax Residency: the 183-day and 280-day tests
Ireland looks at two years, not one — which is how a split stay slips through
The test people miss
The 183-day test is familiar. The second one is not: Ireland also adds this year and the previous year together and asks whether the total reaches 280.
That catches the arrangement the single-year test cannot see. Spend 150 days in Ireland this year and 150 last year and you have cleared 183 comfortably in both — while the two-year total is 300, well past 280.
One relief applies: a year in which you spent 30 days or fewer in Ireland is disregarded entirely for this test, so an occasional short visit cannot be dragged into a total against you.
The Irish tax year
Ireland uses the calendar year — 1 January to 31 December. This is worth stating because its nearest neighbour does not: the UK tax year runs 6 April to 5 April, and confusing the two shifts every count.
Beyond day counting
Residence is only one part of the Irish picture. Ordinary residence and domicile affect what is actually taxable, and the remittance basis can matter a great deal for non-domiciled residents. None of that is a day count, and none of it is something residex.io will tell you.
What residex.io does about it
Residex runs both tests: the calendar-year count and the two-year total, including the 30-day disregard. If either is approaching, you see it — and the two-year one is flagged with the years that make it up, so the number is explainable.
Who needs to watch this
- Anyone splitting time between Ireland and the UK
- Returning Irish emigrants
- Contractors on multi-year Irish engagements
- Anyone who spent a heavy year in Ireland and assumes last year is behind them
Counting days is where this stops
Residex tells you exactly where you stand against this threshold and warns you before you cross it. Crossing it is not a conclusion, though: it does not tell you what you owe, whether a treaty offers relief, which forms to file, or how this interacts with residency you already hold elsewhere.
That is where Amanda picks up — turning a day count into a read on your real cross-border obligations.
Track it automatically
Free forever. No account required. Your data never leaves your device.
How residex.io works
residex.io tracks where you have physically been, and tells you where that puts you against each country's own residency threshold.
What it does: • Counts your days per country, and per area for the Schengen 90/180 rule • Applies each country's actual rule — 183 days for most, 180 for Thailand, the UK's 6 April tax year, Portugal's rolling twelve months, and the US weighted three-year test • Counts days the way each rule counts them, including the arrival and departure days that most tests count and a nights-based tally misses • Warns as you approach a threshold, and can notify you on the date a trip you have already planned would take you across it • Exports to CSV, or hands off to Amanda for the compliance picture
Built for digital nomads, frequent travellers, expats, and anyone whose year is split across borders.
On your device, and nowhere else. There is no account, no login, and no copy of your travel history on our servers — residex works offline because the data never needed to be anywhere else.
It leaves your device only when you decide to send it: • A backup file you save yourself • A transfer to another device, encrypted with a code only you hold — the server relaying it cannot read what it is carrying • A hand-off to Amanda, which you start
We do receive a small amount of anonymous usage information — how many trips are in a log, how old an install is, the language the app is used in, and a random identifier that is not linked to you. Never a trip, a date, a destination, or your name. It is listed in full in our Privacy Policy.
The trade-off worth knowing: because your device holds the only copy, clearing your browser data or deleting the app erases it, and we cannot restore it. Save a backup before you switch devices.
No — residex is a day counter, not a compliance engine. It flags when you cross a threshold like the 183-day rule, but turning that into specific filings, tax exposure, or reporting obligations depends on your jurisdictions and personal ties.
For that, our partner Amanda maps your full cross-border legal exposure across countries, surfaces the filings and deadlines you trigger, and turns the data residex collects into a concrete compliance picture you can hand to your accountant.
You can export your residex trips and import them straight into Amanda — the CSV formats are aligned.