¿Tengo que declarar inmuebles o ahorros en el extranjero (box 3)?

As a Dutch tax resident you generally declare worldwide assets, including foreign property and savings, in box 3 of your tax return. Tax treaties often prevent double taxation, and the 30% ruling can exempt some foreign assets through partial non-resident status, so the outcome depends on your situation. Reporting correctly avoids problems, so advice is useful for international assets.