What do you have to do to get Portuguese nationality?

How to get Portuguese citizenship

Ever wanted to be Portuguese? Have you lived in the country for a while now and are thinking of making it permanent? Or maybe you’re a British citizen uncertain of your status in Portugal after Brexit?
What is the IMT and how is it calculated?

IMT: what it is and how to work it out

The Municipal Property Transfer Tax (Imposto Municipal sobre a Transmissão Onerosa de Imóveis or IMT) is a tax on onerous transfers of properties in Portuguese territory.