Portugal Tax Residency (183-day rule)

Key parameters
Threshold	183 days
Period / Window	Rolling 12 months
Counting	Nights (overnight stay)
Alternative	Habitual home test

You are a Portuguese tax resident for a tax year if you meet either of two tests, in any order:

• 183-day presence — more than 183 days in Portugal, each counted day including an overnight stay.
• Habitual home — fewer than 183 days, but a home available in Portugal that you intend to keep and use as your main residence.

For the habitual home test, a home you own, rent, or otherwise have access to counts, as long as the circumstances suggest you intend to keep and use it as your main residence. A property held purely as an investment or holiday let, with no sign you intend to live in it, does not satisfy this test.

Meeting either test makes you resident for the whole tax year, taxed on worldwide income. A handful of other categories — crew on Portuguese-flagged ships or aircraft, and Portuguese state employees serving abroad — are also automatically treated as resident.

• A day without an overnight stay doesn't count. Someone commuting into Portugal for work every day but sleeping elsewhere each night could spend far more than 183 days present without meeting the 183-day test.
• Moving to a listed low-tax country doesn't cut ties for Portuguese nationals. An anti-avoidance rule keeps them treated as Portuguese resident for the year of the move plus the following 4 years, unless they can show a genuine reason such as temporary work for a Portuguese employer.
• IFICI replaced the old NHR regime, and the two don't overlap. Portugal's Non-Habitual Resident (NHR) scheme was replaced from 2024 by the IFICI, a narrower regime taxing qualifying income from research, innovation and other high-value-added activities at a flat 20%, with most foreign-source income exempt. Anyone approved for NHR by 31 December 2023 keeps the old terms for their full 10-year period instead.

Getting your residency status wrong and misreporting income can trigger a fine under Portugal's general tax-infractions code, with the amount depending on whether the error was negligent or deliberate. Where the misreporting concerns income that should have been declared as a resident, the fine is calculated on the tax that went unpaid rather than a fixed sum. Professional tax advice is strongly recommended in situations like this.

Clearing the day count with room to spare

You move to Lisbon in February and spend 250 nights in Portugal over the following 12 months, all including overnight stays. You clear the 183-day threshold easily, so you're a Portuguese tax resident for the year.

Commuting in without staying overnight

You work in Portugal on weekdays but fly home each evening to a country just across the border, spending zero nights in Portugal all year. Even though you're physically present on well over 183 days, none of those days include an overnight stay, so the 183-day test isn't met. The habitual home test could still apply, though, if you keep accommodation available in Portugal.

Keeping a home without spending much time there

You relocate abroad for work but keep your Porto apartment furnished and available, visiting only 40 nights during the year with clear intent to return and live there again. You fall well short of the 183-day test, but the habitual home test can still make you a Portuguese tax resident based on that available, intended-as-habitual accommodation.

• Portal das Finanças — Article 16 of the IRS Code (Residence)
• Portal das Finanças — Article 58-A of the Tax Benefits Statute (IFICI)