What US owners of Spanish property must file
Owning real estate in Spain creates a Spanish tax obligation that is entirely independent from your US filings. Whether the property sits empty, generates rental income, or you sell it, you must self-assess and pay through Modelo 210, the return for Spain's Non-Resident Income Tax (IRNR). The rate is 24% for US residents on imputed and rental income, 19% on capital gains, and — under the AEAT's current criterion — no expense deductions apply to rental income.
The critical difference from the US system: Spain sends no reminder and issues no assessment. The obligation is entirely self-declared. Most US owners discover it years later, when a sale is held up or the AEAT issues a back assessment with surcharges. Filing is annual, individual per owner, and mandatory even with zero income.