I was in Portugal recently and while talking to friends they said that Portugal has a special agreement with EU ( an agreement designed to help Portugal's economy, it is a very poor country) where if you live in the counrtry for 183 days and apply for residency then you can live tax free for 10 years,.i.e no tax on your pension or investments for 10years. The programme is designed for retirees but working people are also are taxed at a lower rate There are some exclusions for example, civil servants cannot take advantage of this. Applying for residency in Portugal doe not affect your residency in Ireland in any way. I think its very interesting but the only downside for me is Portugal's weather, it's hot, has blue skies and very little rain.