In general, non-resident companies who buy properties in Spain, through any legal means, are subject to a special IRNR. This form should be submitted during the month of January following the date the tax becomes due, which is 31st of December of each year. The tax base shall usually be the cadastral value of the real-estate property. The tax rate is 3%. The companies whose country has signed an agreement to avoid double taxation with Spain are considered taxables but exempts from the tax. In order to apply the exemption, these companies must submit in the Tax Office where the asset is placed, along with the form, tax residence certificate of the foreign company and its partners.