26 Jun Forms 720 and 721 in Spain: Beyond a Mere Reporting Obligation

For years, the debate surrounding Form 720 was dominated by the severity of its penalty regime. The fines for failing to report assets and rights held abroad were among the most controversial features of the Spanish tax system, to the point of prompting a ruling from the Court of Justice of the European Union (CJEU).

In 2026, however, the principal risk no longer lies in the consequences of a late filing or a minor omission. The focus has shifted to broader ground: the ability of the Spanish Tax Agency (AEAT) to map a taxpayer’s financial position, verify the source of their funds, and test the consistency between assets held abroad and income declared in Spain.

International taxation today demands constant attention, because the line between formal compliance and exposure to one’s wealth is exceedingly thin. The consolidation of Form 721 for virtual assets, the imminent transposition of the DAC8 Directive on the automatic exchange of information regarding crypto-assets, and recent developments before the Spanish Supreme Court have changed the rules of the game.

For companies with international treasury operations and for high-net-worth individuals, these reporting obligations call for preventive analysis rather than an after-the-fact reaction.

The rules in force: thresholds and deadlines

To set the current scene, it is worth recalling how both obligations operate:

• Form 720 (assets and rights held abroad): it is structured around three independent categories (bank accounts, securities/rights, and real estate). Exceeding the threshold of €50,000 in any one of them as at 31 December triggers the obligation to file the form between 1 January and 31 March of the following year.
• Form 721 (crypto-assets held abroad): it governs the holding of virtual assets in the custody of foreign undertakings. As with the former, it is required where the combined valuation as at 31 December exceeds €50,000.

From the CJEU ruling to the new penalty regime

Following the CJEU ruling of 27 January 2022 (Case C-788/19, European Commission v Kingdom of Spain), the removal of the proportional 150% fine and of the absence of any limitation period gave way to an apparently more predictable framework.

At present, a late filing made without a prior request from the authorities results in a fixed penalty of €100 per item or set of data, with a minimum of €1,500 per category of information, no maximum limit having been established for the time being.

The risk to one’s wealth is no longer present, yet other sources of risk remain:

The concept of an “item or set of data”

Although the amount of the minimum penalty is clear, what constitutes an “item” or a “set of data” continues to give rise to friction.

• Under Form 720, each bank account (with its IBAN, closing balance, and average balance) or each property is treated as a single category of information.
• Under Form 721, each virtual wallet or public key held in the custody of a foreign third party operates in the same way. The danger is that omitting a wallet containing multiple diversified assets can multiply the €1,500 minimum category by category, giving rise to a penalty assessment far higher than initially anticipated.

The formal penalty as a gateway to a substantive inspection

With the implementation of the new international standards for the automatic exchange of information on crypto-assets, opacity is all but non-existent. In practice, a late filing may become the starting point for verification proceedings aimed at establishing the source of the funds used to acquire those assets, ascertaining whether the income ought to have been taxed under personal income tax (IRPF) or corporate income tax, and tracing whether transfers between platforms (exchanges) generated undeclared capital gains. Here the penalties are no longer €100, but rather the ordinary penalties under the General Taxation Act, which may reach 150% of the unpaid tax brought to light.

By way of example: a Spanish tax resident holds a portfolio of crypto-assets valued at €300,000, held in the custody of a foreign platform. Even if they file Form 721 late and accept the corresponding formal penalty, the truly relevant question will be to substantiate the source of the funds invested and the correct taxation of the gains obtained on the transactions carried out during the tax years not yet time-barred.

The international net tightens: DAC8 and the CARF framework

The scope for discrepancies between the information declared and that available to the authorities will become ever narrower. Directive (EU) 2023/2226 (DAC8), which incorporates the CARF (Crypto-Asset Reporting Framework), has required crypto-asset service providers subject to the MiCA Regulation, since 1 January 2026, to collect and report detailed information on their clients and transactions.

The first automatic exchange of this data between European tax authorities will take place in 2027. In parallel, the AEAT is already processing the ministerial order to adapt Forms 172, 175, 289, and 721. The direct consequence? From 2027 onwards, the Spanish tax authorities will automatically cross-check what is declared against the information reported directly by exchanges and custodians.

A new front before the courts: the Spanish Supreme Court order of 21 January 2026 (No. 8616/2024)

As if the picture were not already complex enough, the Spanish Supreme Court has opened an unexpected gap. By means of its order of 21 January 2026 (No. 8616/2024), it has admitted a key cassation appeal for consideration.

The Court will establish binding case law to determine whether the 2022 CJEU doctrine requires a declaration of nullity in respect of all past proceedings in which the former penalty regime was applied (so as to safeguard the primacy of EU law) or whether, on the contrary, it does not affect proceedings already closed. While it would be unwise to anticipate the outcome, the fact that the appeal has been admitted reveals a legal question that may open the door to reviewing and challenging old Form 720 assessments.

Conclusion

Declaring assets held abroad has ceased to be a mere administrative formality. For corporations with international treasury operations and high-net-worth individuals, the question is no longer how much the fine for filing late will cost, but whether their overseas structure can withstand an automated cross-check of data against the tax position declared in Spain.

At Navarro Llima Abogados, we assist our clients with the preventive review of international wealth structures, the proper management of reporting obligations in respect of assets held abroad, and the assessment of potential tax exposures arising from the new automatic information-exchange mechanisms. In a context of increasing international transparency, anticipation has become the principal instrument for protecting one’s wealth.