The basic idea is straightforward: a government grants the right to live there to overseas buyers who invest a set amount in local real estate. The qualifying amount differs greatly across programmes, and governments revise it more often than buyers expect.
A crucial distinction stands between the right to reside and naturalisation. The permit gives you the right to live there, typically on a renewable basis, whereas citizenship generally takes far more time and additional conditions. An agent's promise of a passport simply for buying an apartment in spain an apartment is reason for caution.
Beyond the purchase price, such permits come with additional requirements. Frequent requirements include a police clearance certificate, private health insurance, evidence of sufficient means and a required physical presence in the country per year. Ignoring any of these can cost you the permit even if the property is still yours.
Tax status forms a separate question entirely. Holding a residence permit does not necessarily make you taxable on worldwide income, georgia flats though living there for most of the year frequently does. Many countries rely on a threshold based on days spent locally, and the effects reach foreign income.
The practical advice remains straightforward: choose the property first, with the permit as a secondary benefit. Such schemes get restructured from time to time, and a home selected purely for the status becomes a poor asset once the rules change.