I was planning on moving to Lisbon with my family in 15 months. We were delaying the move because my wife is heavily pregnant and I ideally wanted to avoid moving everyone until the new-born was a bit older. However, the NHR is a critical part of the plan, so I am now considering rushing to Portugal on my own, getting a NIF, renting a place with a 12-month contract and getting the NHR this year before it ends. However, I would then return to the UK as soon as it is granted.
I was wondering if there are any implications/problems in claiming tax residency in both countries (from a Portuguese NHR perspective). I know there is a double-taxation treaty, but the UK simply won't accept me temporarily leaving its system, and I am okay with paying taxes in both countries (because the Portuguese tax would be zero anyway).
Could this cause me to lose my NHR? Are there other issues with this plan (from the Portuguese perspective)?
I'm a French and UK citizen, and I currently officially reside in the UK, if this is of relevance.