There is a way to retire at 63 in Spain. The key requirement is not age, but your pension

In Spain, retiring at 63 is possible through early retirement, but only if key eligibility rules are met.

Workers generally need at least 35 years of contributions and must be no more than two years below the statutory retirement age.

The pension after applying reduction factors must still exceed the minimum pension applicable at age 65.

For 2026, voluntary early retirement cuts range from 2.81% to 21%; involuntary early retirement and special rules also apply to self-employed workers and civil servants.