Entry bans – If you're caught travelling in Spain – or any other Schengen country – past the 90-day period, you could be banned from re-entering for up to 3 years. Prison sentences – Staying in Spain for over 90 days in any 180 days without a valid visa can result in jail time.
Can I retire in Spain as a US citizen?
Retiring to Spain from the U.S.A. is perfectly possible. However, for stays of longer than 90 days, Americans need to get a visa to live in Spain. There is no Spain retiree visa, but there is a Spain long term visa known as a residence visa. There is also the Spain long stay visa called a “Golden Visa.”