Form 720: The Foreign Asset Declaration Every Expat in Spain Should Know About

If you’re a foreigner living, working, or investing in Spain, chances are you hold bank accounts, investments, or property back in your home country or elsewhere abroad. Many expats find out too late that once they become tax residents in Spain, the Spanish Tax Agency (AEAT) wants to know what assets they hold outside the country. That obligation is channeled through Form 720, the informative declaration of assets and rights held abroad, and understanding it correctly from year one saves you unnecessary headaches down the road.

What Is Form 720 and Who Needs to File It?

Form 720 isn’t a tax — you don’t pay anything by filing it. It’s a purely informative declaration through which the Tax Agency asks Spanish tax residents to detail the assets they hold outside Spanish territory. The obligation applies to anyone who is a tax resident in Spain, regardless of Spanish nationality, and regardless of whether they already hold an NIE (foreigner identification number) or are still in the process of obtaining one. It’s worth remembering that tax residency doesn’t depend on your visa status — it hinges on criteria such as spending more than 183 days a year in Spain or having the center of your economic interests here. Many digital nomads and self-employed workers registered under Spain’s RETA scheme (the special self-employed workers’ regime within Social Security) become tax residents without realizing it, and with that status comes the potential obligation to file this form.

The Three Asset Groups and the €50,000 Threshold

Form 720 organizes foreign assets into three independent groups: accounts held at financial institutions (current accounts, savings accounts, deposits); securities, rights, life or disability insurance policies, and income held or managed abroad (shares, investment funds, pension plans, and in some cases cryptocurrency); and real estate and rights over real estate located outside Spain. The filing obligation arises independently for each group whenever the combined value of the assets within that group exceeds €50,000. If you don’t reach that threshold in any of the three groups, you don’t need to file anything. And once you’ve filed for the first time, in subsequent years you only need to file again if the value of any group increases by more than €20,000 compared to your last declaration, or if you dispose of an asset previously declared. A common mistake is assuming you have to refile every year with all your data — in practice, you generally only need to update what has changed significantly.

Penalties After the CJEU Ruling, and the March Deadline

For years, Form 720 had a reputation as one of the most feared reporting obligations in Europe, because the original penalty regime punished any omission or delay with steep fixed fines per undeclared item, and could also treat the undeclared asset as an unjustified capital gain — attributable even to tax years that would otherwise be time-barred, plus additional surcharges. The Court of Justice of the European Union (CJEU) ruled that this regime breached EU law for being disproportionate compared to penalties for other purely domestic informative declarations, forcing Spain to overhaul its penalty system. Since then, Form 720 non-compliance is penalized under the general rules of Spain’s General Tax Law, meaning penalties more in line with those applied to any other informative declaration — though non-compliance still carries real consequences, so it shouldn’t be taken lightly. The filing window runs from January 1 to March 31, reflecting your asset position as of December 31 of the previous year; anyone who becomes a tax resident partway through the year should keep this in mind ahead of their first applicable filing.

At Zythos Business, we help self-employed professionals and small businesses — many of them foreigners just starting their tax life in Spain — get obligations like this in order before they become a problem: identifying whether Form 720 applies to you, correctly calculating the thresholds for each asset group, and coordinating it with the rest of your Spanish tax affairs, so that settling in or investing here is a smooth process rather than an administrative obstacle course.