Home/Residency
Residency
Tax residency
Whether Portugal considers you a tax resident decides almost everything else about your taxes. Here is how the rules work.
The two tests
The two main tests concern time spent in Portugal and a habitual home. More than 183 days in a 12-month period beginning or ending in the relevant year can establish residence. With fewer days, a home held in conditions showing a current intention to maintain and occupy it as a habitual residence can also qualify.
For the day-count test, a full or partial day counts when it includes an overnight stay. See the tax-residency guide for a worked rolling-period example and the exceptions that need checking.
Determining your status
Count your days
Add every day with an overnight stay in Portugal across the relevant 12-month window, not just the calendar year.
Look at your home
Record when a home was available and how you used it. Ownership alone does not resolve whether the habitual-home conditions apply.
Check the treaty
If both countries treat you as resident, read the applicable treaty and establish the relevant facts. Do not assume that domestic residence or an address registration settles treaty residence.
Register your status
Your address on record with the tax office (via your NIF) should match where you live. Changing it late is a common and avoidable source of problems.
Partial-year residency
The starting point is generally the first day of presence once the residence conditions are met, subject to exceptions including residence in the preceding year. A visa or address-change date is not automatically the correct tax date. Read the arrival-year guide before allocating income between periods.
If residence status changes during the year, article 57(6) provides for separate declarations for each status where filing is required. Prepare the dates and records with the first-filing checklist, then use the Modelo 3 guide for the filing workflow.
Sources: CIRS article 16 and article 57. Editorial source check: 15 September 2026. Professional review has not been recorded.
Related guides
The complete residency guide covers day counting, the arrival year, and treaty tie-breakers with examples.