Complete guide for the Spanish crypto investor: everything you need to know
If you invest in cryptocurrencies in Spain, this is the reference guide you need to have on hand. We've put together essential crypto tax concepts into a single, up-to-date resource for 2025.
1. What are cryptocurrencies for tax purposes?
In Spain, cryptocurrencies are considered real estate of a digital nature... No. They are movable property (such as jewelry or precious metals) for general tax purposes. The profits from its sale are taxed on the personal income tax savings base.
They are not legal tender, they are not guaranteed by any central bank, and they are not treated as foreign currencies (although some consultations from the CJEU are analogous).
2. What operations generate a taxable event?
Any transmission of cryptocurrencies:
- Sale of crypto for euros.
- Exchange of one crypto for another (crypto-crypto).
- Use of crypto to pay for goods or services.
- Crypto donations.
They do not generate a taxable event:
- Transfers between your own wallets.
- Buy crypto with euros.
- Staking (until you receive the rewards).
3. The FIFO method: mandatory in Spain
Spain requires the FIFO (First In, First Out) method: when you sell, you are considered to sell the oldest units first.
You cannot use LIFO, average price or any other method. The tax software applies FIFO automatically if you import the data correctly.
4. Types of income and their classification
| Operation type | Classification | Base |
|---|---|---|
| Crypto sale/exchange | Capital gain | Savings (19-28%) |
| Staking interest | Furniture capital performance | Savings (19-28%) |
| Airdrops/cashback | Capital gain | General (marginal rate) |
| Payment for services in crypto | Economic activity performance | General |
| Regular mining | Economic activity performance | General |
5. Personal income tax sections 2025 for the savings base
| Liquidable base | Type |
|---|---|
| 0 - €6,000 | 19% |
| €6,000 - €50,000 | 21% |
| €50,000 - €200,000 | 23% |
| €200,000 - €300,000 | 27% |
| >€300,000 | 28% |
6. Most important information models
- Form 172: Crypto balances on exchanges based in Spain (presented by the exchange).
- Form 173: Operations of the year in exchanges based in Spain (presented by the exchange).
- Form 721: Crypto balances on foreign exchanges > €50,000 (submitted by the taxpayer in January).
7. The 10 most common mistakes
- Not declaring crypto-crypto swaps.
- Use average price instead of FIFO.
- Forget commissions in the acquisition cost.
- Do not match transfers between your own wallets.
- Do not declare staking and airdrops.
- Do not carry forward losses from previous years.
- Mix general base and savings boxes.
- Do not present Form 721 if applicable.
- Ignore operations in DeFi or own wallets.
- Starting the declaration in April without having the data prepared.
8. Minimum documentation to keep
- CSVs from all exchanges (10 years).
- History of all your own wallets.
- P2P purchase receipts.
- Relevant DeFi transaction hashes.
- Reports from your tax software for each year.
9. Legal optimization strategies
- Tax loss harvesting: Realize losses before 12/31 to offset gains.
- Timing between fiscal years: Defer large sales to the following year to take advantage of low periods.
- Donations to NGOs: Tax deduction + declared capital gain.
- Cross Compensation: Stock losses offset crypto gains and vice versa.
10. The future of crypto taxation
- DAC8 (2026): Automatic exchange of crypto data between EU countries.
- MiCA: Regulation that increases the transparency of exchanges.
- 721 + 172/173: The AEAT already has data on most operations.
The conclusion is clear: reporting correctly is the only sustainable long-term strategy.
Recommended tool
To correctly calculate the FIFO, import the CSVs from all your exchanges and generate the tax report ready to transfer to the Treasury draft, use declaracrypto.es — the Spanish platform specialized in cryptocurrency taxation, without KYC, with your data under your control.
Updated: April 2026 | Fiscal year: 2025