We turn thousands of transactions across exchanges, wallets, and blockchains into a clear, verified, and 100% AEAT-compliant tax report.
We combine data engineering and tax advisory to analyze every transaction with precision.
At Cleriontax, we transform how you manage your tax data. We don’t use generic third-party software: we apply our own process of cleaning, reconciliation, and tax classification that allows us to deliver 100% verified reports ready for the AEAT.
We gather your files from exchanges, wallets, and DeFi platforms to unify them into a single, coherent structure.
We detect duplicates, internal transfers, and errors that automated programs fail to recognize.
We analyze each transaction according to Spanish tax criteria: gains, losses, staking, swaps, airdrops, etc.
We generate a traceable, clear, and justified tax report, ready to file with full confidence.
We don’t use third-party automated software. We analyze your data from scratch to ensure accuracy, traceability, and full tax compliance.
Our team combines tax expertise and data analytics to deliver results that no automated tool can match. We process millions of multichain transactions with technical rigor, interpreting each one according to the Spanish Tax Agency’s (AEAT) criteria. This way, we turn chaotic data into 100% reliable, verifiable, and auditable tax reports.
We don’t rely on automated software. Each transaction is classified and verified according to Spanish tax regulations.
Ethereum, BSC, Polygon, Solana, Cosmos, Osmosis... We understand each ecosystem and its tax implications.
Every figure is backed by its source. Full transparency before the Tax Agency.
We process data in our own secure environments, never uploading it to external servers.
We guide you through the entire process, explaining every result clearly and with solid tax reasoning.
Advanced data cleaning, normalization, and reconciliation. We process complex CSV files, APIs, and blockchain records with technical precision.
Tailored tax solutions for every type of crypto investor.
We analyze your transactions across exchanges, wallets, and DeFi platforms to generate a complete, verified, and 100% AEAT-compliant tax report.
View moreWe integrate your results from cryptocurrencies, stocks, and other assets to prepare an accurate tax return, free of errors and risks before the Tax Agency.
View moreWe offer expert tax guidance to resolve your questions, review your reports, and plan your digital asset tax strategy.
View moreWe review and correct automated reports generated by third-party software, applying real tax criteria and verifying every transaction.
View moreWe answer the most common questions about digital asset filing in Spain.
Yes, if you have cryptocurrencies abroad worth more than €50,000, you must declare them in form 720. Additionally, any sale, exchange, or use of cryptocurrencies generates a capital alteration that must be declared in the income tax return, regardless of whether you withdraw the money or not.
AEAT applies the FIFO (First In, First Out) criterion: the first cryptocurrencies you bought are considered the first ones sold. Each sale or exchange generates a capital gain or loss that must be calculated with the acquisition price and the transfer price. We apply this criterion exactly in all our reports.
Yes. Staking and farming rewards are considered capital income. Swaps between tokens, even in DeFi, are exchanges that generate capital gains or losses. Liquidity provision may involve taxable events depending on how it's structured. At Cleriontax, we analyze each DeFi protocol to tax-classify each operation.
Automatic tools don't understand the Spanish tax context and don't correctly reconcile movements between wallets, duplicates, or internal transfers. Additionally, they don't correctly classify complex DeFi operations (such as wrapping, bridging, or multichain staking). At Cleriontax, we manually review each operation and correct these errors to guarantee a 100% accurate report.
We need CSV files from all your exchanges (Binance, Kraken, Coinbase, etc.), the addresses of your on-chain wallets (MetaMask, Ledger, etc.), and any record of operations on DeFi platforms. It's also useful if you indicate the approximate dates of purchase of your first assets if you don't have complete records.
The time depends on transaction volume: from 3-5 days for simple cases to 2-3 weeks for very complex portfolios with thousands of DeFi transactions. The price adjusts according to complexity, number of platforms, and data volume. Request your quote without obligation and we'll give you an accurate estimate within 24-48h.
Have more questions?
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Specialized tax advisory in cryptocurrencies, DeFi, and complex investment portfolios. Verified, personalized tax reports 100% compatible with AEAT.