When does Portugal start taxing your foreign income?
The 183-day rule decides whether Portugal taxes your worldwide earnings or only what you make here. What counts, what does not, and the traps in a first IRS filing.
Most people move to Portugal thinking about the lease, the school place and the NIF. The tax question surfaces the following May, when the filing window opens. By then it is too late to plan and too early to relax.
Everything turns on one question: are you tax resident in Portugal? If you are, Portugal taxes your worldwide income. If you are not, it taxes only what you earned here.
How the 183 days are counted
The main test sits in article 16 of the Portuguese Personal Income Tax Code: more than 183 days spent in Portugal, consecutive or not, in any twelve-month period beginning or ending in the tax year concerned.
Three details catch people out. The days do not need to run together, so multiple trips add up. The twelve-month window is not necessarily the calendar year. And any day that includes a night spent on Portuguese soil counts.
It is not only about days
Even with fewer than 183 days, you can be treated as resident if, on any day in that period, you have accommodation in Portugal held in conditions suggesting you intend to keep it as a habitual home. A furnished flat on a twelve-month lease, available to you, can be enough.
What changes in practice
As a resident you declare everything here: Portuguese and foreign salaries, pensions, rent from property abroad, capital gains, interest and dividends. Rates are progressive and reach 48%, with a solidarity surcharge above certain thresholds. As a non-resident you are taxed only on Portuguese-source income, typically at a flat 25% on employment and service income.
That does not mean paying twice. Portugal has double taxation treaties with dozens of countries, but they only work if you file correctly and claim the credits you are owed.
Before you file for the first time
Check your registered tax address on the Portal das Finanças, because that is the address the tax authority works from. Keep proof of entries and exits if your year was borderline. And check whether a special regime applies to you: recent arrivals working in qualifying fields may fall under IFICI, the 20% regime that replaced non-habitual residency.
For a first filing with income in two countries, an hour with a certified accountant usually costs less than the mistake it prevents.
Image: Kolforn / Wikimedia Commons (CC BY-SA 4.0)
