Staking and validation: taxation of rewards

The tax treatment of staking —locking crypto-assets to take part in the validation of a proof-of-stake network in exchange for a reward— depends on the specific mechanics of the protocol and on the taxpayer’s position. Let us start from the general rule and then turn to the cases that depart from it.

The starting distinction: passive reward versus business activity

The relevant doctrine starts from ruling V1766-22 and has been reiterated since, among others in V0648-24 for a broader set of crypto-asset operations. The criterion is as follows: where the taxpayer merely locks or delegates crypto-assets and receives the reward from the protocol itself, without deploying an organisation of material and human resources on its own account, the DGT reclassifies the income as investment income —specifically, the transfer to third parties of one’s own capital under Article 25.2 of the Personal Income Tax Act (LIRPF)— included in the savings base. It should be noted that this holds even where the taxpayer acts as a network validator: if validation is carried out automatically and with minimal resources, the income remains investment income. That is precisely the case resolved by V1766-22.

Only where there is a genuine organisation of means of production and human resources on one’s own account —the test of Article 27.1 LIRPF— does the classification shift to an economic activity, with taxation in the general base and the deductibility of the corresponding expenses that this entails. The boundary, once again, lies in the organisation of means, not in whether or not there is a client to whom a service is provided.

When is it reported: on receipt or on sale?

The timing of recognition does not depend on when the rewards are converted into euros, but on the period in which the income becomes due to its recipient (Article 14.1.a LIRPF), which in staking coincides with the moment each reward is deemed received —and at which it is valued at its euro market value (Article 43.1 LIRPF)—. In liquid staking or in systems with lock-up periods, that moment is not always evident, so each reward should be documented precisely as to when it is genuinely deemed to have been received.

Example. 10 ETH are locked on 1 February at €1,600/ETH (an investment of €16,000), with an annual yield of 3.8%. By 31 December, after eleven months, 10 × 3.8% × (11/12) = 0.348 ETH in rewards have accrued. To value them as investment income, the year-end closing price should not be used, but rather the market price at the moment each reward was credited. At a weighted average price of €1,850/ETH —a weighted average price is used here merely as a simplification of the calculation; strictly, each reward is valued at its crediting date—, the income for the year is 0.348 × 1,850 = €643.80, reported as investment income. If those 0.348 ETH are later sold at €3,200/ETH (€1,113.60), the capital gain will be 1,113.60 − 643.80 = €469.80: the difference between the sale price and the value on which they were already taxed as income.

Two points set out in V0648-24 are worth noting, which the example leaves aside for simplicity. First, if a fee is paid to the validators in order to obtain the reward —the so-called minting fee—, it is not a deductible expense against the investment income; however, where it is directly linked to the acquisition of the new crypto-assets, it is added to their acquisition value (Article 35.1 LIRPF) and, by that route, reduces the future capital gain. Second, an early-unlock penalty reduces the gross investment income of Article 25.2 LIRPF.

Liquid staking: a genuine grey area

Liquid staking complicates the analysis. Where ETH is deposited and a representative token —stETH, rETH or others— is received in exchange, there is not yet a clear and specific binding ruling in Spain that closes its tax treatment. Two defensible theses are possible: that there is a barter with immediate tax effect, because a different asset is received; or that it is a mere economic representation of the same position, with no relevant change in net worth until the later disposal or redemption. In the absence of express doctrine, neither of the two should be presented as a settled criterion. It is, as things stand, a question to be handled with caution and properly documented.

Staking through an exchange

Where staking is channelled through a centralised exchange, the analysis should not be oversimplified either. It may be a mere economic transfer of the net yield generated by the platform, and the documentary support is usually provided by the exchange’s own statement. From the perspective of the individual taxpayer, the logic remains the same: include the income received and then calculate the gain or loss when the tokens received are disposed of.

Common errors

Three errors recur. First, not reporting the rewards on the view that they are taxed only on withdrawal. Second, not keeping evidence of the euro value on the relevant recognition date. Third, transposing without nuance settled rules to liquid-staking or custodial-staking structures, which still have grey areas today.

Reporting obligations and documentary traceability

A point often confused: Forms 172 and 173 are regulatory reporting obligations of certain service providers on balances and transactions with virtual currencies; they are not “articles of the Personal Income Tax Act”. In addition to the providers’ obligations (Forms 172 and 173), the taxpayer is itself subject to Form 721, the information return on virtual currencies held abroad where the regulatory thresholds are exceeded (Order HFP/886/2023), whose breach carries its own penalty regime. To this is added the European DAC8 framework, which will reinforce the automatic exchange of information on crypto-assets. The fact that the intermediary reports does not, in any case, replace the taxpayer’s obligation to declare their income correctly.

For residents in Spain, the practical recommendation is to keep the annual statements, the transaction histories and the euro-valuation methodology used. Consistency between one’s own records and the information that may reach the authorities from custodians and platforms is decisive in the event of a tax review. That documentation should be kept together with the return for the limitation period.