Country guideTax residency
Tax residency in Portugal: how the day count works
Portugal treats you as tax resident once you spend more than 183 days there, consecutive or not, in any 12-month period that starts or ends in the tax year concerned. A home you keep as your habitual residence can make you resident with far fewer days.
What is the day threshold in Portugal?
Portugal makes you tax resident if you spend more than 183 days, consecutive or not, on Portuguese territory within any 12-month period that starts or ends in the tax year in question. The rule is set out by the Portal das Financas, the Portuguese tax authority, and mirrored in PwC's Portugal summary.
Once resident, Portugal taxes your worldwide income. Residency also starts from the first day of the stay that qualifies you, because Portugal applies partial-year residency rather than all-or-nothing years.
| Day threshold | More than 183 days |
|---|---|
| Counting window | Any 12-month period starting or ending in the tax year |
| Partial days | A day counts when it includes an overnight stay in Portugal |
| Other triggers | A home held as your habitual residence on any day of the period |
| Source | Portal das Financas |
Calendar year or rolling window?
Rolling window. This is the trap for anyone used to calendar-year rules like Spain's. Under a calendar-year count you can straddle a year-end and reset to zero on 1 January. Under the Portuguese rule there is no reset: the tax office can slide a 12-month window over any part of your travel history, and if any window that touches the tax year contains more than 183 Portuguese days, you are resident.
In practice that means a winter stay from October to January and a summer stay from May to August belong to the same window, even though they sit in different calendar years.
Do partial days count?
Portugal has an unusually precise answer: a day of presence is any day, complete or partial, that includes an overnight stay in Portugal. Land at 23:00 and sleep in Lisbon, and that partial day counts. Fly in at 08:00 and out at 22:00 the same day, and it generally does not, because no night was spent there. Most countries count any moment of presence, so Portugal's overnight test is slightly narrower, but do not rely on day-trip arithmetic to stay under the line: keep evidence of where you slept.
What else can make you resident besides days?
The habitual-home test. Even with far fewer than 183 days, you are resident if on any day of the 12-month period you have a home in Portugal in conditions that suggest a current intention to keep and occupy it as your habitual residence. A 12-month lease, your furniture, your utility contracts and your family living there all point that way. A holiday flat you visit twice a year usually does not, but the line is factual, not formal.
On the incentive side, the Non-Habitual Resident regime closed to new applicants in 2024. Its successor, the IFICI incentive for scientific research and innovation, applies a 20 percent rate to a much narrower set of professions, so check eligibility before assuming any special regime applies.
A worked example with 2026 dates
Under 183 in each year, over 183 in one window
A freelancer winters in Lisbon from 1 October 2025 to 15 January 2026, then returns from 1 May to 15 August 2026.
| Stay | Dates | Days |
|---|---|---|
| Winter | 1 Oct 2025 to 15 Jan 2026 | 107 (31 + 30 + 31 + 15) |
| Summer | 1 May to 15 Aug 2026 | 107 (31 + 30 + 31 + 15) |
| Window 1 Oct 2025 to 30 Sep 2026 | 214 of 183 |
Per calendar year he looks safe: 92 days in 2025 and 122 in 2026, both under 183. But the 12-month window from 1 October 2025 to 30 September 2026 contains all 214 days, and that window ends in the 2026 tax year. Portugal can treat him as resident. The same travel pattern in Spain, which counts calendar years, would not trigger residency on days alone.
How do I track my days for Portugal?
A calendar-year total is not enough here. You need to test every 12-month window that touches the tax year, which is tedious by hand and exactly what software is for. Log where you sleep each night and keep leases and tickets as evidence.
Check a rolling 12-month window
The free 183-day calculator can count your days across any 12-month window, the way Portugal does.
Every window, watched
Staydays logs your nights per country automatically and recalculates rolling windows daily, so a Portuguese window never sneaks up on you.
Frequently asked questions
Is the Portuguese count a calendar-year count?
No. Portugal counts more than 183 days in any 12-month period that starts or ends in the tax year concerned. A stay that straddles two calendar years, with under 183 days in each, can still cross the Portuguese threshold inside one rolling window.
Which days count as presence in Portugal?
Any day, complete or partial, that includes an overnight stay in Portugal counts as a day of presence. A same-day round trip without a night spent there generally does not count, which is a narrower definition than most countries use.
Can I become resident with fewer than 183 days?
Yes. If on any day of that 12-month period you have a home in Portugal in conditions that suggest you intend to keep and occupy it as your habitual residence, you are resident from that day, whatever your day count.
Is the NHR regime still available?
Not for new applicants. The Non-Habitual Resident regime closed to new entrants in 2024. Its successor, the IFICI tax incentive, sometimes called NHR 2.0, offers a 20 percent rate to people in qualifying scientific research and innovation roles, with a much narrower scope.
This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Confirm details with official sources or a qualified advisor.
Last updated: 2026-07-14