The measure is affecting almost five million people in Madrid and neighbouring cities.
The study’s second most popular city for expats may come as more of a surprise.
Iceland’s capital of Reykjavik came in second place, ranking highly with its rich culture, social welfare system, and natural beauty.
The country is the perfect place for expats wanting to experience a good work-life balance and live in close proximity to other places in Europe.
Icelanders have a life expectancy of 82.4 years, approximately two years more than the Organisation for Economic Co-operation and Development (OECD) average.