- Annual obligation for custodians and exchanges to report crypto asset balances of their clients residing in Spain.
- Mandatory submission during the month of January, valuing the assets as of December 31.
- Clear differentiation between the business report (172 and 173) and the personal declaration of assets abroad (721).
If you operate within the cryptocurrency ecosystem and manage a business in Spain, you've likely heard about the new tax obligations that have recently come into effect. This isn't just a suggestion; it's a strict regulatory framework designed to ensure the Spanish Tax Agency keeps a close eye on everything related to virtual currencies, preventing the sector from becoming a tax haven.
To avoid getting caught out by the tax authorities, it's crucial to understand that there are now specific forms that require custodians and exchanges to report their clients' activity . You, as the user, don't necessarily have to fill everything out in this case, but if you're the one offering the service, you have a legal responsibility that, if not met, could result in a hefty fine.
What exactly does Model 172 consist of?
This form is essentially an annual information return detailing the balances users hold in virtual currency. To put it simply, it's like a bank reporting a checking account balance, but applied to digital assets. Its purpose is to allow the Spanish Tax Agency (AEAT) to know exactly who owns what and its value at the end of the year.
When it comes to the required information, no detail is spared. You must provide the full identification of the account holder (name, tax ID number, etc.), the type of cryptocurrency, the number of units in the wallet, and its equivalent value in euros. A key point here is that stablecoins are also virtual currencies ; even though their value is pegged to the dollar, they remain virtual assets and must be declared without exception.
Who is required to submit this declaration?
Not everyone has to deal with Form 172. This obligation applies to individuals and entities resident in Spain , as well as permanent establishments of foreign entities operating in Spanish territory. Specifically, it affects those who provide services for safeguarding private cryptographic keys to maintain, store, or transfer virtual currencies on behalf of third parties.
In simple terms, this includes exchanges, custodians, and trading platforms that act as intermediaries. If your business holds the "keys" to your clients' assets, you fall under the category of those required to report.
Timeframes and asset valuation
The schedule is very simple but inflexible: the filing is annual and must be done during the month of January of the year following the fiscal year being reported. If someone ceased to hold the currency before December 31, the information will refer to the exact date on which this occurred.
Regarding the price, to assign a value to the assets, the price at 23:59 PM on December 31st (peninsular time) should be used. To obtain this data, it is recommended to use major trading platforms or price tracking websites. If this data is unavailable, a reasonable estimate of the market value can be presented , always indicating the source of that valuation.
Required addenda: Model 173 and 721
Form 172 isn't the only form. There's also Form 173 , which, while Form 172 provides a snapshot of the final balance, analyzes the entire year's transactions. Form 173 reports on all transactions : purchases, sales, swaps, staking, and airdrops. The Tax Agency cross-references this data to determine if the taxpayer has experienced capital gains that haven't been declared on their income tax return.
On the other hand, we have Form 721. Unlike the previous forms, this one is filed by the taxpayer , not the company. It is used to declare cryptocurrencies held abroad when their value exceeds €50.000. It is important to note that cold wallets, where the user has full control of their private keys, are excluded from this form, as there is no longer a third-party custodian.
Consequences of ignoring the regulations
Playing cat and mouse with the tax authorities in the crypto sector is a risky strategy. Failure to comply with these regulations can result in substantial financial penalties , especially for companies responsible for reporting. Fines are usually proportional to the volume of undeclared transactions and can be increased in cases of repeat offenses.
In addition to the financial impact, the lack of transparency opens the door to thorough audits and requirements that can paralyze a business's operations. Fiscal transparency is no longer optional in the blockchain world; it's the only way to operate with legal certainty.
Shipping procedure and technical aspects
These forms are not submitted by simply filling out a PDF; instead, they are sent electronically following the official registration templates. If the submitted file contains errors, the Spanish Tax Agency (AEAT) will only accept the correct entries and will return a message explaining the reason for rejection for the incorrect ones, requiring the applicant to correct and resubmit the form.
This automated system allows immediate traceability of funds, linking each transaction to a specific tax identification number, which eliminates the anonymity that characterized virtual assets in their early days and ensures that all market players play by the same rules.
The implementation of forms 172, 173, and 721 represents the consolidation of state control over crypto assets in Spain, shifting the reporting burden primarily to custodians and exchanges during January. While forms 172 and 173 are business reporting tools for balances and transactions, form 721 is the responsibility of individuals with assets held outside the country. Ignoring these obligations carries serious financial and legal risks, making expert advice the best investment for any entity operating with virtual currencies.