When working with Modelo 720, many tax residents in Spain face not a lack of data, but its incorrect interpretation. This is especially common in complex situations where assets are spread across different countries, types, and formats.
Let us review several typical cases where mistakes most often occur.
Case 1. Bank accounts in multiple countries
An investor moved to Spain and kept bank accounts in different countries. One account is actively used, another is used occasionally, and a third was opened many years ago.
The main mistake is ignoring inactive or old accounts. In practice, for Modelo 720 what matters is the existence of the asset, not how actively it is used.
Additional difficulties arise when determining the value of assets and understanding whether the reporting threshold within the category has been exceeded.
Case 2. Combined assets
A tax resident has an investment account with a broker and real estate located outside Spain. The data for these assets comes from different sources and is presented in different formats.
A common mistake is evaluating all assets together or incorrectly defining their categories. Under Modelo 720 each category is assessed separately, which directly affects the obligation to file.
When data is not properly organized and structured, the likelihood of errors increases significantly.
Case 3. Change of tax residency
An investor moved to Spain during the year and is unsure which assets should be included and for which period.
Errors in such cases are usually caused by an incorrect determination of when tax residency begins. This leads to a misinterpretation of reporting obligations.
Why errors occur
In all these situations, the issue is not the absence of information. The data exists, but it is scattered. It is presented in different formats. It is not aligned with the requirements of the Spanish Tax Agency.
For this reason, the key factor is not only having the data, but structuring it correctly.
Conclusion
Complex situations when filing Modelo 720 are more common than they seem. Assets in multiple countries, different types of investments, and changes in tax residency increase the risk of mistakes.
A structured approach to data helps reduce these risks and makes the filing process clearer and more manageable.