Journal · Tax Planning · Private Wealth & Compliance
Modelo 721 Explained: How to Declare Crypto Held Abroad in Spain
A complete guide to Spain’s crypto reporting return for the 2027 filing season: who must file, the €50,000 threshold, why self-custody is excluded, how to value crypto on 31 December, the €20,000 rule for later years, penalties after the EU Court ruling and how Modelo 721 interacts with income tax, wealth tax and the Beckham regime.
Quick answer
Modelo 721 is the information return Spanish tax residents file when crypto held with foreign custodians exceeds €50,000 on 31 December. It is filed online from 1 January to 31 March and involves no payment. Self-custody wallets are excluded. Consistent 721 filings also support the AML file a notary reviews in a crypto-to-fiat property purchase in Spain.
Why Modelo 721 Matters for the 2027 Filing Season
Modelo 721 is now entering its fourth filing season. Since 2024, Spanish tax residents with significant crypto on foreign exchanges must report it every year between January and March, and the 2027 season covers holdings on 31 December 2026. Vicox Legal advises crypto investors, HNWIs and founders on tax compliance in Spain and Portugal, and on the acquisition of real estate with digital assets, where a clean reporting history is a central part of the origin-of-funds file.
Three developments make the 2027 season different. In April 2026, the Dirección General de Tributos confirmed in binding ruling V0848-26 that crypto in self-custody is outside Modelo 721, whatever the type of wallet. DAC8 has applied across the EU since 1 January 2026, so foreign providers in Member States that have transposed it report Spanish-resident clients to their own authorities, who share the data with Spain. And the dissolution of the Cortes in October 2026 caused the national DAC8 bill to lapse, but left Modelo 721 untouched.
This guide explains who must file, what is included and excluded, how to value crypto on 31 December, when a new return is required in later years, the penalty regime, and how Modelo 721 fits with income tax, wealth tax and the Beckham regime. For the wider picture, see our guide to crypto tax in Spain.
Legal Framework of Modelo 721
Modelo 721 is defined as an annual information return on virtual currencies located abroad. It is not a tax: filing it involves no payment, but failing to file it carries penalties.
Legal basis
Law 11/2021 on tax fraud prevention extended the obligation to report assets abroad to virtual currencies, through the eighteenth additional provision of the General Tax Law (LGT). Royal Decree 249/2023 added Article 42 quater to the General Regulation on Tax Management (RGAT), and Order HFP/886/2023 approved the form, its content and the filing procedure. The first return was filed in 2024, covering holdings on 31 December 2023.
Relationship with Modelos 720, 172 and 173
Modelo 720 covers bank accounts, securities and real estate abroad, while Modelo 721 covers crypto custodied abroad. Spanish crypto providers report their clients’ balances and operations through Modelos 172 and 173, which is why crypto held with Spanish providers is not reported again on Modelo 721.
DGT doctrine
The DGT has clarified the scope of the return in several binding rulings, notably V2290-23 and V0848-26 on self-custody. Its criterion is that Modelo 721 applies when a third party safeguards the private keys on behalf of the taxpayer, not when the taxpayer controls them.
EU framework
DAC8 (Directive (EU) 2023/2226) adds a separate layer of reporting by providers. It does not replace Modelo 721, which remains a personal obligation of the taxpayer. Our analysis of MiCA, DAC8 and cross-border compliance for HNWIs explains how the EU rules fit together.
Who Must File Modelo 721
The obligation to file Modelo 721 is defined by three cumulative conditions: Spanish tax residence, a qualifying relationship with crypto held by a foreign custodian, and an aggregate value above €50,000 on 31 December.
| Condition | Detail |
|---|---|
| Spanish tax resident | Individuals and entities resident in Spain, and permanent establishments of non-residents |
| Qualifying relationship | Holder, beneficiary, authorised person, person with power of disposal, or beneficial owner under Ley 10/2010 |
| Foreign custodian | A provider not resident in Spain and without a Spanish permanent establishment safeguards the private keys |
| Threshold | Total value of all crypto with foreign custodians above €50,000 on 31 December |
The threshold is aggregate: the values of all crypto-assets held with foreign custodians are added together. If the total exceeds €50,000, every holding must be reported, including small ones. Joint holders and authorised persons each have their own obligation. Taxpayers who ceased to hold the assets during the year may still need to report the balance on the date the relationship ended.
Non-residents are not required to file. Taxpayers under the Beckham regime are taxed under non-resident rules, and tax authority guidance indicates they are generally not required to file Modelo 720; the same reasoning is generally applied to Modelo 721, as explained in our guide to the Beckham Law for crypto investors.
What Counts and What Is Excluded
The scope of Modelo 721 depends on who controls the private keys. The table summarises the main situations.
| Situation | Included in Modelo 721? | Reason |
|---|---|---|
| Crypto on a foreign exchange (custodial account) | Yes | A foreign third party safeguards the keys |
| Crypto with a foreign custodian or wallet provider holding the keys | Yes | A foreign third party safeguards the keys |
| Crypto on a Spanish exchange or Spanish establishment | No | Reported by the provider on Modelos 172 and 173 |
| Hardware wallet controlled by the taxpayer | No | Self-custody (V2290-23, V0848-26) |
| Software or mobile wallet where the taxpayer holds the keys | No | Self-custody (V0848-26) |
| Foreign exchange registered with Banco de España | Yes, if not Spanish resident | Registration does not make the provider Spanish |
| Crypto pledged as collateral with a foreign lender | Generally yes | A foreign third party holds the assets |
Self-custodied crypto is excluded from Modelo 721, but it remains subject to income tax on disposals and to wealth tax. Investors who borrow against crypto should note that collateral held by a foreign lender is usually reportable; our guide to crypto-backed loans for property in Spain explains the structure.
Planning note. Moving crypto into self-custody takes it outside Modelo 721, but it does not reduce income or wealth tax, and for taxpayers under the Beckham regime it can have the opposite effect, because self-custodied crypto is considered located in Spain. Custody decisions should be reviewed as a whole by Vicox Legal’s private wealth practice.
Step-by-Step Filing Process
Filing Modelo 721 involves seven steps, from identifying custodians to keeping evidence of the submission.
- Inventory of custodians and wallets — List every exchange, custodian, lender and wallet provider used during the year. Separate self-custody wallets, Spanish providers and foreign custodians.
- Identification of foreign custodians — For each provider, confirm its legal entity, country of residence and whether it acts in Spain through a permanent establishment. Registration with Banco de España is not decisive.
- Year-end balances — Download statements showing units held on 31 December for each crypto-asset and custodian, or on the date the holding ended if it ended during the year.
- Valuation in euros — Value each holding at its 31 December market price, using a reliable and consistent source, and record the source used.
- Threshold test — Add the values of all holdings with foreign custodians. If the total exceeds €50,000, or exceeds the last declared value by more than €20,000, a return is required.
- Electronic filing — File through the tax authority’s online portal between 1 January and 31 March, with a digital certificate, electronic ID or Cl@ve. For each holding, report the crypto name and symbol, units, euro value and the custodian’s name, address and country.
- Record keeping — Keep the submission receipt, the statements and the valuation source. These records also serve as evidence of origin of funds if the crypto is later used for a significant purchase.
How to Value Crypto on 31 December
Valuation for Modelo 721 is defined as the market value of each crypto-asset on 31 December. The tax authority does not prescribe a single price source, so the taxpayer chooses a reasonable source and states it.
- Use a recognised source. The quotation of the custodian itself, a major exchange or a recognised price aggregator is acceptable.
- Be consistent. Use the same source and time of day for all holdings and keep the same approach in later years.
- Illiquid assets. Where there is no market quotation, use a reasonable estimate of market value and document the method.
- Align with wealth tax. Crypto is also valued at market value on 31 December for wealth tax, so the same figures should support both.
| Example holding (31 Dec) | Custodian | Value | Counts toward threshold? |
|---|---|---|---|
| 0.6 BTC | Foreign exchange A | €38,000 | Yes |
| 5 ETH | Foreign exchange B | €14,000 | Yes |
| 2,000 USDC | Foreign exchange A | €1,900 | Yes |
| 1 BTC | Hardware wallet | €63,000 | No (self-custody) |
| Total with foreign custodians | €53,900 | Above €50,000: file and report all three holdings |
Later Years: The €20,000 Rule
Once a taxpayer has filed Modelo 721, a new return is not required every year. It is required again when the aggregate value of crypto held with foreign custodians on 31 December exceeds the value of the last return by more than €20,000.
A new return is also relevant when the holdings reported are extinguished, for example because the account is closed or the assets are moved to self-custody or to a Spanish provider. Investors should keep a simple register of each return filed, its total value and the custodians included, so they can apply the rule correctly each January.
Penalties After the EU Court Ruling
The penalty regime for Modelo 721 is defined by the general rules of the General Tax Law. The original Modelo 720 regime, with its fixed €5,000 penalties per item and unlimited time to assess, was declared contrary to EU law by the Court of Justice of the European Union in Case C-788/19 on 27 January 2022, and Law 5/2022 replaced it. Modelo 721, introduced afterwards, has no special penalty regime.
| Infringement | Penalty |
|---|---|
| Not filing, detected by the tax authority | €20 per data item, minimum €300, maximum €20,000 |
| Late filing without prior request from the tax authority | €10 per data item, minimum €150, maximum €10,000 |
| Incomplete, inaccurate or false data | Up to 2% of the amount not reported or wrongly reported, minimum €500 |
Filing late on your own initiative halves the penalty. Correcting omissions before any notification from the tax authority is therefore the most efficient course for taxpayers who missed past deadlines.
Modelo 721, Income Tax, Wealth Tax and the Beckham Regime
Modelo 721 is an information return, but the data it contains is cross-checked against the taxpayer’s other obligations. Consistency between them is what matters in practice.
| Obligation | What it covers | Link with Modelo 721 |
|---|---|---|
| Income tax (IRPF) | Gains on disposals, staking and lending income | Changes in reported holdings should match declared disposals |
| Wealth tax (Modelo 714) | Net worth, including all crypto at 31 December | Values should be consistent; wealth tax also includes self-custody |
| Solidarity tax | Net worth above €3 million | Same valuation basis |
| Beckham regime (Modelo 151) | Only Spanish-source income | Generally no Modelo 721 during the regime |
| DAC8 reporting by providers | Transactions and balances reported by providers | Data received from other Member States can be compared with 721 |
Investors who are planning to retire or relocate should factor these obligations into their numbers, as explained in our analysis of how much bitcoin you need to retire in Spain. Those comparing Spain with Portugal can read our guide to moving to Portugal in 2026, and those holding crypto through companies our analysis of Luxembourg wealth structuring.
Modelo 721 and Buying Property with Crypto
When crypto is used to buy property in Spain, the notary and the bank verify the origin of funds under Ley 10/2010. A history of Modelo 721 returns and income tax filings that match the crypto being converted is one of the strongest pieces of evidence an investor can provide.
- Consistency. The amounts converted to euros should be consistent with the holdings reported and the gains declared.
- Regularisation first. Investors with gaps in past filings should regularise them before converting large amounts, not after.
- Documentation. Statements, valuation sources and submission receipts should be included in the origin-of-funds file, as explained in our guide to proving the legal origin of crypto funds in real estate.
The general purchase process for international buyers is set out in our guide to buying property in Spain as a foreigner, and Vicox Legal’s crypto real estate practice manages the full transaction for clients who buy real estate with crypto in Spain and Portugal.
Why Spain Is a Leading Jurisdiction for Crypto Real Estate Transactions
Spain’s crypto reporting rules are demanding, but they also give compliant investors a documented track record that the legal system recognises when crypto wealth is converted into property.
- A reliable Land Registry. The Registro de la Propiedad protects registered titles against third parties, so property acquired with crypto is held with full legal certainty.
- Ex ante legal control by notaries. Under the Latin notarial system, the notary verifies legality, identity and means of payment before signing, preventing defects rather than litigating them later.
- Robust AML implementation. Ley 10/2010, SEPBLAC supervision and the notarial centralised AML body create predictable requirements for investors with documented funds.
- Open to non-EU investors. Foreign nationals can buy property in Spain with an NIE, without requiring residence.
- Clear reporting rules. Modelo 721, its thresholds and the DGT’s doctrine on self-custody give investors a stable basis for compliance.
- Regulated conversion infrastructure. With MiCA authorisation now required, crypto can be converted to euros through providers supervised in the EU.
- Comparative position. Compared with jurisdictions with less developed registries or uncertain crypto rules, Spain offers investors more predictability, at the cost of more documentation.
Vicox Legal manages the full process for clients who buy real estate with crypto in Spain and Portugal, from tax compliance review to Land Registry inscription.
Modelo 721 Checklist for the 2027 Filing Season
- Confirm you were a Spanish tax resident in 2026 and not under the Beckham regime.
- List every exchange, custodian, lender and wallet provider you used during 2026.
- Identify which providers are foreign and which are Spanish residents or have a Spanish establishment.
- Separate self-custody wallets, which are excluded from Modelo 721.
- Download balances on 31 December 2026 for each crypto-asset and foreign custodian.
- Value each holding at its 31 December market price and record the source used.
- Add the values: file if the total exceeds €50,000.
- If you filed before, check whether the total exceeds your last return by more than €20,000.
- Collect each custodian’s legal name, address and country.
- File online between 1 January and 31 March 2027 and keep the receipt.
- Check that your income tax and wealth tax returns are consistent with the values reported.
- If you missed past deadlines, file late voluntarily before receiving any notice from the tax authority.
Frequently Asked Questions
Who has to file Modelo 721 in Spain?
Spanish tax residents, including companies and permanent establishments of non-residents, must file Modelo 721 when the total value of crypto held with custodians not resident in Spain exceeds €50,000 on 31 December. The obligation applies to holders, beneficiaries, authorised persons, people with power of disposal and beneficial owners. Non-residents do not file, and taxpayers under the Beckham regime are generally not required to file during the regime. Crypto with Spanish providers or in self-custody is excluded.
Do I need to declare a hardware wallet on Modelo 721?
No. Modelo 721 applies only to crypto whose private keys are safeguarded by a third party abroad. The Dirección General de Tributos confirmed in binding rulings V2290-23 and V0848-26 that crypto in self-custody, where the taxpayer controls the keys, is outside the return, whether it is held in a hardware wallet or a software wallet. Self-custodied crypto remains subject to income tax on disposals and to wealth tax, so it must still be valued and declared there when applicable.
Is the €50,000 threshold per exchange or in total?
In total. The values of all crypto-assets held with foreign custodians on 31 December are added together, regardless of the number of exchanges or assets. If the total exceeds €50,000, the taxpayer must file and report every holding, including small balances, identifying each crypto-asset, the number of units, its euro value and the custodian’s name, address and country. Crypto held in self-custody or with Spanish providers is not included in the calculation.
Do I have to file Modelo 721 every year?
Not necessarily. After the first return, a new one is required only when the aggregate value of crypto held with foreign custodians on 31 December exceeds the value of the last return filed by more than €20,000. A new return is also relevant when the holdings reported are extinguished, for example when an account is closed. Keeping a record of each return, its total value and the custodians included makes it easy to apply the rule every January.
What is the penalty for not filing Modelo 721?
Modelo 721 follows the general penalty regime of the General Tax Law. Not filing, when detected by the tax authority, carries €20 per data item, with a minimum of €300 and a maximum of €20,000. Filing late on your own initiative halves the penalty to €10 per item, with a minimum of €150 and a maximum of €10,000. Incomplete or inaccurate data can be penalised with up to 2% of the amount concerned, with a minimum of €500.
Do I pay tax when I file Modelo 721?
No. Modelo 721 is an information return: it reports holdings and involves no payment. Tax on crypto arises separately, through income tax on disposals, staking and other income, and through wealth tax and the solidarity tax on net worth where they apply. The values reported on Modelo 721 should be consistent with those returns, because the tax authority cross-checks them, including with data received from other Member States under DAC8.
Converting Crypto Into Property in Spain? Start With a Clean File
Vicox Legal reviews your crypto reporting history, regularises gaps and manages the full legal process for international investors acquiring property in Spain and Portugal with digital assets.
