How many days do you actually have to be there?

Residency programmes are usually sold on how little you have to be present. The honest answer is more complicated, because three separate presence concepts apply at once and they do not always agree.

The three calendars

• Immigration presence — the minimum days required to keep the residence permit valid and to qualify for renewal or permanent status.
• Tax presence — the days that make you tax resident, which may be a different number, and may be triggered by other factors such as having a home available.
• Naturalisation presence — the days required to convert residency into citizenship, which is usually stricter and measured over a longer window.

A jurisdiction can be extremely light on the first, moderate on the second, and demanding on the third. Portugal's fund route is light on immigration presence; that does not make it light on the naturalisation question, and the 2025 amendments lengthened that horizon.

The interaction people miss

If you are physically present in a country for more than roughly half the year, you will likely be tax resident there regardless of what your permit says. That is a problem when the residency you obtained was chosen precisely because it does not tax your income type. Presence and permit are separate instruments, and a plan has to satisfy both.

There is a second, subtler interaction: presence in a country you are trying to leave. If you keep a home available in your old jurisdiction, spend meaningful time there, and your family remains there, a treaty tie-breaker can still place your tax residence in the country you thought you had left — even after you have obtained residency elsewhere.

The point of all this is not that low-presence programmes are unusable. It is that "no minimum stay" is a statement about one calendar, and plans get built on it as if it were a statement about all three.