{"id":21263,"date":"2026-01-16T03:41:00","date_gmt":"2026-01-16T02:41:00","guid":{"rendered":"https:\/\/www.in-diem.com\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\/"},"modified":"2026-08-12T03:21:48","modified_gmt":"2026-08-12T01:21:48","slug":"common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them","status":"publish","type":"post","link":"https:\/\/www.in-diem.com\/en\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\/","title":{"rendered":"Common mistakes when declaring cryptocurrencies in Spain and how to avoid them"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">\n<p class=\"wp-block-paragraph\"><em><strong>IMPORTANT:<\/strong> This article analyzes common errors in reporting cryptocurrencies in Spain in accordance with the regulations, reporting forms, and tax criteria available at the time of publication. Currently, any tax return reporting transactions involving cryptoassets must be reviewed on a case-by-case basis, taking into account the applicable income tax filing period, current personal income tax regulations, the reporting requirements of Forms 172, 173, and 721, and the Tax Agency\u2019s updated guidelines. <\/em><\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Cryptocurrency taxation<\/strong> has undergone unprecedented scrutiny. <strong>Discover the most frequent mistakes <\/strong>that trigger <strong><a href=\"https:\/\/www.hacienda.gob.es\/es-ES\/Paginas\/Home.aspx\">Tax Agency <\/a><\/strong>requirements and learn how to avoid them with this updated practical guide.<\/p>\n\n<p class=\"wp-block-paragraph\">The <strong><a href=\"https:\/\/sede.agenciatributaria.gob.es\/\">Tax Agency <\/a><\/strong>has significantly strengthened its capacity to monitor cryptocurrency operations. Thanks to the implementation of <strong>informative forms 172 and 173<\/strong>, the Tax Agency receives detailed data\u2014balances, operations, swaps, commissions\u2014directly from exchanges. <strong>Any discrepancy triggers automatic alerts<\/strong>. <\/p>\n\n<p class=\"wp-block-paragraph\">Therefore, if you operate with cryptocurrencies, avoiding the most frequent mistakes is essential to prevent requirements, penalties, and even costly tax regularizations. This guide clearly explains the 8 mistakes that the Tax Agency detects most easily and how to avoid them safely in 2025. <\/p>\n\n<h2 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4;font-size:22px;font-style:normal;font-weight:400\"><strong>The 8 most frequent mistakes when declaring cryptocurrencies in Spain<\/strong><\/h2>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Failure to Report Crypto-to-Crypto Swaps<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">This is the most widespread mistake among cryptocurrency investors. Many taxpayers mistakenly believe they only need to declare when they convert their crypto assets to euros. The reality is very different: <strong>every exchange between different cryptocurrencies generates a taxable event<\/strong> that must be declared as a capital gain or loss.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Example:<\/strong> swapping <strong>BTC \u2192 ETH<\/strong> is tax-equivalent to:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>A sale of BTC<\/li>\n\n\n\n<li>A purchase of ETH<\/li>\n<\/ul>\n\n<p class=\"has-vivid-cyan-blue-color has-text-color has-link-color wp-elements-fd72ea2052417d7f427e4973d00c662d wp-block-paragraph\"><strong>You must declare the gain or loss based on the market value at the time of the swap.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Record all your exchange operations between cryptocurrencies, including the date, amounts, and market value of both assets at the time of the swap.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><em><strong>Remember<\/strong> <\/em>that every exchange of one crypto for another must be reflected in your income tax return as if you had sold and repurchased.<\/p>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Incorrect Application of the FIFO Method<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">The <strong><a href=\"https:\/\/www.hacienda.gob.es\/en-GB\/Areas%20Tematicas\/Impuestos\/Direccion%20General%20de%20Tributos\/Paginas\/Direccion%20general%20de%20tributos.aspx\">General Directorate of Taxes<\/a><\/strong> has traditionally established that the FIFO method must be applied to determine which cryptocurrencies are transferred when you make a partial sale of your portfolio. This means that the units you acquired first are considered sold first, regardless of which ones you actually sell. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong><em>Important<\/em>:<\/strong> Although the High Court of Justice of the Basque Country has recently questioned the mandatory application of FIFO to cryptocurrencies, the administrative doctrine of the Tax Agency continues to consider it the applicable method. Given this situation of legal uncertainty, the most prudent approach is to continue applying FIFO until there is clear regulation establishing otherwise. <\/p>\n\n<p class=\"wp-block-paragraph\">A frequent mistake is applying FIFO per platform, when it must be applied per cryptocurrency in a unified manner across all your wallets and exchanges.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Maintain an exhaustive chronological record of all your acquisitions for each type of cryptocurrency, regardless of the platform used.<\/li>\n\n\n\n<li>Use specialized tax calculation tools that automatically unify your operations from all platforms.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><em><strong>Remember <\/strong><\/em>that when you sell, you must apply FIFO considering all your holdings as a single set.<\/p>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Waive purchase, sale, and transfer fees<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\"><strong>Purchase, sale, and transfer commissions are deductible expenses <\/strong>that reduce your capital gain or increase your loss. However, many taxpayers omit them in their calculations, which generates discrepancies when the Tax Agency cross-references data with the information provided by exchanges through <a href=\"https:\/\/sede.agenciatributaria.gob.es\/Sede\/todas-gestiones\/impuestos-tasas\/declaraciones-informativas\/modelo-172-declaracion-informativa-sobre-virtuales\/preguntas-frecuentes.html\">forms 172 and 173<\/a>. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Download detailed reports of your operations from each exchange you use.<\/li>\n\n\n\n<li>Ensure that your tax calculation tool or advisor correctly includes all commissions in both purchases and sales.<\/li>\n\n\n\n<li>Keep all commission receipts as part of your tax documentation.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Report only the gains and omit the losses<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Some taxpayers, due to lack of knowledge or in an attempt to &#8220;simplify&#8221; their declaration, only include operations that have generated gains. This approach is doubly harmful: on one hand, it generates inconsistencies detectable by the Tax Agency when cross-referencing data with exchanges; on the other, it makes you lose the opportunity to tax-offset your losses. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Declare all operations, without exception.<\/li>\n\n\n\n<li>Keep track of uncompensated losses from previous years to apply them correctly in subsequent years.<\/li>\n\n\n\n<li>If you have many operations, use professional tools or an expert advisor. To delve deeper into this topic, you can consult more tax guides on the <a href=\"https:\/\/www.in-diem.com\/en\/blog\/\" data-type=\"link\" data-id=\"\/blog\/\"><strong>IN DIEM<\/strong> blog.<\/a> <\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Failure to report cryptocurrency income (staking, airdrops, wages)<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Income received in cryptocurrencies, even if not immediately converted to euros, constitutes earnings that must be declared at their market value at the time of receipt. This includes: <\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Staking:<\/strong> Rewards obtained for maintaining cryptocurrencies in network validation are considered income from movable capital and are taxed in the savings base.<\/li>\n\n\n\n<li><strong>Airdrops:<\/strong> Tokens received for free are considered income that must be valued at the market price at the time of receipt.<\/li>\n\n\n\n<li><strong>Salaries or professional payments:<\/strong> If you receive your remuneration fully or partially in cryptocurrencies, you must declare it as income from work or economic activities as appropriate.<\/li>\n\n\n\n<li><strong>Interest from lending:<\/strong> Interest generated by lending your crypto assets is considered income from movable capital.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Record the exact market value of any cryptocurrency on the date of receipt.<\/li>\n\n\n\n<li>Save transaction hashes.<\/li>\n\n\n\n<li>Clearly distinguish between income from movable capital (staking, lending) and possible income from economic activities if your cryptocurrency activity is of a business or professional nature.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Confusing internal transfers between your own wallets with sales<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Moving cryptocurrencies between your own wallets does not generate a capital gain or loss, as no transfer to a third party occurs. However, if you do not correctly document these internal transfers, they may be misinterpreted as sales, generating discrepancies with the data the Tax Agency receives from exchanges. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Maintain a detailed record of all transfers between your own wallets and exchanges (including source and destination addresses, amounts transferred, and dates).<\/li>\n\n\n\n<li>Save transaction hashes.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Failure to retain supporting documentation<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.boe.es\/buscar\/act.php?id=BOE-A-2003-23186\">General Tax Law<\/a> establishes a four-year period for the Tax Agency to verify the tax situation of taxpayers. During this period, you must be able to prove the origin of your funds, the acquisition cost of your cryptocurrencies, and the reality of all your operations. <\/p>\n\n<p class=\"wp-block-paragraph\">Failure to justify the origin of the cryptocurrencies or their acquisition cost can lead the Tax Agency to consider that the entire sale constitutes a capital gain (applying a zero acquisition cost) or even that there are signs of concealment or simulation.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Keep all relevant documentation for at least four years: bank statements proving transfers to exchanges, screenshots of operations, purchase and sale confirmations, transfer receipts, and any relevant communication with the platforms.<\/li>\n\n\n\n<li>Periodically export complete operation histories from all exchanges you use. If you have performed operations on platforms that no longer exist or have closed your account, this documentation will be your only proof. <\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>Reporting Cryptocurrencies on Form 720 When It Is Not Required<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Many taxpayers confuse form 720 and 721. It is essential to understand their differences: <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Form 720:<\/strong> Used to declare assets and rights located abroad (bank accounts, securities, real estate). <\/p>\n\n<p class=\"has-vivid-cyan-blue-color has-text-color has-link-color wp-elements-e14df1e30abbbc679f74580e703f87f2 wp-block-paragraph\" style=\"font-size:14px\"><strong>Cryptocurrencies are NOT declared on this form.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Form 721:<\/strong> The specific form for declaring cryptocurrencies located abroad. They must only be declared if: <\/p>\n\n<ul class=\"wp-block-list\">\n<li>They are held by a third party abroad (exchanges or platforms outside Spain)<\/li>\n\n\n\n<li>The combined value exceeds \u20ac50,000 as of December 31<\/li>\n\n\n\n<li>They are not held in Spain through forms 172 and 173<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong><em>Important<\/em>:<\/strong> Self-custody wallets (where you control the private keys) should NOT be declared on form 721, as there is no third-party custodian.<\/p>\n\n<p class=\"wp-block-paragraph\">More information on these informative obligations can be found on the <a href=\"https:\/\/sede.agenciatributaria.gob.es\/\">Tax Agency<\/a> electronic office.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>How to avoid it:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Identify if your exchange is in Spain or abroad.<\/li>\n\n\n\n<li>Check if the exchange reports forms 172 and 173.<\/li>\n\n\n\n<li>Submit form 721 only when it is actually appropriate.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4;font-size:22px;font-style:normal;font-weight:400\"><strong>The role of forms 172, 173, and 721<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">Informative forms 172 and 173 have radically transformed tax control over cryptocurrencies:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Form 172:<\/strong> Platforms and exchanges with residence in Spain must report the cryptocurrency balances held by their clients as of December 31 each year, including the type of cryptocurrency, the amount, and its valuation in euros.<\/li>\n\n\n\n<li><strong>Form 173:<\/strong> These same entities must report all operations performed by their clients: acquisitions, transfers, swaps, and transfers, with details of dates, amounts, and commissions.<\/li>\n\n\n\n<li><strong>Form 721:<\/strong> Taxpayers who hold cryptocurrencies abroad held by third parties and exceeding \u20ac50,000 must submit this informative declaration between January 1 and March 31 of the following year.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">These forms allow the Tax Agency to cross-reference data and automatically detect inconsistencies. Therefore, it is essential that your declaration matches exactly the information that the exchanges have reported to the Tax Agency. <\/p>\n\n<h2 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4;font-size:22px;font-style:normal;font-weight:400\"><strong>Practical recommendations to avoid mistakes in your crypto declaration<\/strong><\/h2>\n\n<ol class=\"wp-block-list\">\n<li>Export your full history before submitting your income tax return.<\/li>\n\n\n\n<li>Use professional software with validated traceability.<\/li>\n\n\n\n<li>Record the exact value of each cryptocurrency income.<\/li>\n\n\n\n<li>Distinguish between sales, swaps, and internal transfers.<\/li>\n\n\n\n<li>Document your self-custody wallets.<\/li>\n\n\n\n<li>Check that your declaration matches the reported data.<\/li>\n\n\n\n<li>Consult with specialists if your operations are complex.<\/li>\n\n\n\n<li>Voluntarily regularize if you have made mistakes in previous years.<\/li>\n<\/ol>\n\n<p class=\"wp-block-paragraph\">On our <strong><em> IN DIEM<\/em><\/strong> blog, you will find more guides on taxation and technology applied to the legal sector.<\/p>\n\n<p class=\"has-luminous-vivid-orange-color has-text-color has-link-color wp-elements-068abf1323577ff2a7b99d7b05899530 wp-block-paragraph\"><strong>Do you have doubts about your cryptocurrency declaration? Have you received a requirement from the Tax Agency? Do you need a professional tax report?  <\/strong> <\/p>\n\n<p class=\"wp-block-paragraph\">Contact us and we will offer you a personalized solution for your case. <strong>Cryptocurrency declaration requires specialized knowledge <\/strong>that combines tax law, blockchain technology, and knowledge of the crypto market. <\/p>\n\n<p class=\"wp-block-paragraph\">At <strong>IN DIEM Abogados<\/strong>, in collaboration with <strong><a href=\"https:\/\/cryptoveritas360.com\/\">Cryptoveritas 360<\/a><\/strong>, we prepare crypto tax reports with full traceability and specialized legal analysis to ensure regulatory compliance and your security before the Tax Agency.<\/p>\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4;font-size:22px;font-style:normal;font-weight:400\"><strong>How can IN DIEM Abogados help you?<\/strong><\/h3>\n<\/div><\/div>\n\n<p class=\"wp-block-paragraph\">At <strong>IN DIEM Abogados<\/strong>, we are a firm specialized in cryptocurrency taxation and new technologies. Together with our technological partner <strong>Cryptoveritas 360<\/strong>, we offer a comprehensive service that combines technical, legal, and tax analysis. <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Our services include:<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Comprehensive Crypto Tax Reports<\/strong>: With detailed traceability, accurate tax classification, and support in dealing with the tax authorities.<\/li>\n\n\n\n<li><strong>Guidance on Filing Your 2025 Income Tax Return<\/strong>: We prepare and file your income tax return securely and efficiently.<\/li>\n\n\n\n<li><strong>Adjustments to Prior Years<\/strong>: Complete reconstruction of complex transaction histories, wallets, and transactions.<\/li>\n\n\n\n<li><strong>Defense against tax assessments or penalties<\/strong>: We respond to the tax authorities on your behalf with all the necessary legal documentation.<\/li>\n\n\n\n<li><strong>Personalized attention from an expert attorney: <\/strong>Direct <strong>contact <\/strong>24\/7 to answer your questions and guide you through the entire process.<\/li>\n\n\n\n<li><strong>Utmost confidentiality and professionalism<\/strong>: Your information will be handled with the utmost care.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>If you operate with cryptocurrencies, we help you declare correctly and avoid risks.<\/strong><\/p>\n\n<p class=\"has-luminous-vivid-orange-color has-text-color has-link-color wp-elements-ddeb9f5d1cd6ff7c0c17c32fa938dfea wp-block-paragraph\"><strong>Contact us. We are here to help you. <\/strong><\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<div class=\"indiem-faqs\"><style>.indiem-faqs {\n      width: 100%;\n      max-width: 900px;\n      margin: 28px auto;\n      box-sizing: border-box;\n      font-family: inherit;\n    }\n\n```\n.indiem-faqs * {\n  box-sizing: border-box;\n}\n\n.indiem-faqs-title {\n  margin: 0 0 16px 0;\n  color: #0A3151;\n  font-size: 24px;\n  line-height: 1.3;\n  font-weight: 700;\n}\n\n.indiem-faq-item {\n  margin-bottom: 10px;\n  border: 1px solid #E6E6E6;\n  border-radius: 12px;\n  background: #ffffff;\n  overflow: hidden;\n}\n\n.indiem-faq-item summary {\n  cursor: pointer;\n  padding: 15px 18px;\n  color: #0A3151;\n  font-size: 15px;\n  line-height: 1.4;\n  font-weight: 700;\n  background: #F8FAFC;\n  list-style: none;\n}\n\n.indiem-faq-item summary::-webkit-details-marker {\n  display: none;\n}\n\n.indiem-faq-item summary::after {\n  content: \"+\";\n  float: right;\n  color: #33B4D6;\n  font-size: 20px;\n  line-height: 1;\n  font-weight: 700;\n}\n\n.indiem-faq-item[open] summary::after {\n  content: \"\u2013\";\n}\n\n.indiem-faq-content {\n  padding: 14px 18px 16px 18px;\n  border-top: 1px solid #E6E6E6;\n  color: #333333;\n  font-size: 14px;\n  line-height: 1.55;\n}\n\n.indiem-faq-content p {\n  margin: 0;\n}\n\n@media (max-width: 520px) {\n  .indiem-faqs-title {\n    font-size: 21px;\n  }\n\n  .indiem-faq-item summary {\n    font-size: 14px;\n    padding: 14px 15px;\n  }\n\n  .indiem-faq-content {\n    font-size: 13px;\n    padding: 13px 15px 15px 15px;\n  }\n}\n```\n\n  <\/style><h2 class=\"indiem-faqs-title\">Preguntas frecuentes sobre errores al declarar criptomonedas en Espa\u00f1a<\/h2><details class=\"indiem-faq-item\"><summary>\u00bfQu\u00e9 es el m\u00e9todo FIFO en criptomonedas?<\/summary><div class=\"indiem-faq-content\"><p>El m\u00e9todo FIFO implica considerar que las primeras criptomonedas adquiridas son las primeras que se transmiten. Para aplicarlo correctamente, debe revisarse toda la operativa de cada criptoactivo de forma unificada, incluyendo exchanges, wallets y plataformas utilizadas.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfPuedo aplicar FIFO por cada exchange?<\/summary><div class=\"indiem-faq-content\"><p>No es recomendable aplicar FIFO de forma aislada por plataforma. Lo prudente es calcularlo por criptomoneda y de manera global, integrando todas las operaciones realizadas en exchanges, wallets y dem\u00e1s servicios utilizados por el contribuyente.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfLas comisiones de compra y venta se tienen en cuenta?<\/summary><div class=\"indiem-faq-content\"><p>S\u00ed. Las comisiones pueden afectar al c\u00e1lculo de la ganancia o p\u00e9rdida patrimonial. Las comisiones de compra suelen incrementar el valor de adquisici\u00f3n y las de venta pueden reducir el valor de transmisi\u00f3n, por lo que conviene conservar todos los justificantes.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfDebo declarar tambi\u00e9n las p\u00e9rdidas con criptomonedas?<\/summary><div class=\"indiem-faq-content\"><p>S\u00ed. Es importante declarar tanto ganancias como p\u00e9rdidas. Omitir las p\u00e9rdidas puede generar inconsistencias frente a los datos reportados por las plataformas y, adem\u00e1s, puede impedir aprovechar mecanismos de compensaci\u00f3n fiscal cuando procedan.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfQu\u00e9 documentaci\u00f3n debo conservar sobre mis operaciones cripto?<\/summary><div class=\"indiem-faq-content\"><p>Conviene conservar historiales de exchanges, archivos CSV, justificantes de transferencias bancarias, capturas de operaciones, hashes de transacciones, direcciones de wallets, comprobantes de comisiones y cualquier documento que acredite el origen, coste y destino de los fondos.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfLas criptomonedas se declaran en el modelo 720?<\/summary><div class=\"indiem-faq-content\"><p>No. Las criptomonedas no deben declararse en el modelo 720. Para criptoactivos situados en el extranjero puede resultar aplicable el modelo 721, siempre que se cumplan los requisitos legales, especialmente cuando est\u00e9n custodiados por terceros fuera de Espa\u00f1a y se superen los l\u00edmites establecidos.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfQu\u00e9 pasa si he declarado mal criptomonedas en a\u00f1os anteriores?<\/summary><div class=\"indiem-faq-content\"><p>Si se detectan errores en ejercicios anteriores, puede valorarse una regularizaci\u00f3n voluntaria antes de recibir un requerimiento de Hacienda. La estrategia adecuada depender\u00e1 del tipo de error, los importes afectados, la documentaci\u00f3n disponible y el ejercicio fiscal correspondiente.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfQu\u00e9 riesgos existen si no declaro correctamente mis criptomonedas?<\/summary><div class=\"indiem-faq-content\"><p>Una declaraci\u00f3n incorrecta puede provocar requerimientos, liquidaciones complementarias, recargos, intereses de demora y sanciones. En casos graves, si existen importes elevados, ocultaci\u00f3n o conducta dolosa, tambi\u00e9n podr\u00edan valorarse riesgos penales.<\/p><\/div><\/details><details class=\"indiem-faq-item\"><summary>\u00bfCu\u00e1ndo conviene solicitar un informe fiscal cripto?<\/summary><div class=\"indiem-faq-content\"><p>Conviene solicitarlo cuando existen muchas operaciones, varios exchanges, wallets de autocustodia, DeFi, staking, airdrops, p\u00e9rdidas, operaciones antiguas o dudas sobre el origen de fondos. Un informe fiscal ayuda a ordenar la trazabilidad y justificar la declaraci\u00f3n ante Hacienda.<\/p><\/div><\/details><\/div>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h3 class=\"wp-block-heading has-text-color has-medium-font-size\" style=\"color:#0029a4;font-style:normal;font-weight:400\"><strong>Cryptoveritas 360: Our Technology Partner<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Advice on blockchain and cryptocurrencies requires a multidisciplinary approach. At In Diem Abogados, we work alongside Cryptoveritas 360, our technology partner, to offer a comprehensive service in the areas of cryptoassets, blockchain technology, and digital assets. We combine legal expertise and technological innovation to support companies and individuals at every stage of their projects.  <\/p>\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cryptoveritas360.com\/\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2560\" height=\"1280\" src=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2026\/07\/cryptoveritas_360_consultoria_blockchain_criptoactivos_criptomonedas-_1_-scaled.avif\" alt=\"A Bitcoin coin on a tech-themed background featuring the Cryptoveritas 360 logo, representing blockchain and cryptocurrencies.\" class=\"wp-image-19639\"\/><\/a><figcaption class=\"wp-element-caption\">Bitcoin and blockchain technology: cryptocurrency solutions and analysis with Cryptoveritas 360.<\/figcaption><\/figure>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading has-text-color has-medium-font-size\" style=\"color:#0029a4\"><strong><strong><strong>Expert Cryptocurrency Lawyers: M\u00e1laga, Seville, Madrid, Las Palmas de Gran Canaria, Almer\u00eda, Huelva, <strong><strong>Marbella, Estepona,<\/strong><\/strong>\u2026<\/strong><\/strong><\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">At <strong>IN DIEM Abogados<\/strong> and <strong>Cryptoveritas 360<\/strong> we provide our services at all our <strong>offices and locations in Spain<\/strong>, offering direct and personalized coverage in <strong>Madrid, Seville, M\u00e1laga, Marbella, Las Palmas de Gran Canaria<\/strong>, as well as continuous service through our digital channels for clients throughout the country.<\/p>\n\n<p class=\"wp-block-paragraph\">Our multidisciplinary team also advises <strong>international companies<\/strong>\u2014including <strong>Europe, Latin America and Asia<\/strong>\u2014that wish to <strong>establish or expand in Spain under the MiCA regulatory framework<\/strong>, whether through obtaining the <strong>CASP license from the CNMV<\/strong> or the <strong>incorporation of companies and compliance structures<\/strong> adapted to the European market.<\/p>\n\n<p class=\"wp-block-paragraph\">Thanks to a hybrid working methodology (in-person and online), we guarantee the same level of quality, confidentiality and efficiency for both local and foreign clients, supporting each project from initial planning to effective regulatory authorization.<\/p>\n\n<p class=\"wp-block-paragraph\">We are at your disposal for anything you need. You can reach us via IN DIEM Lawyers Phone (+34) <strong>916 353 892.<\/strong> For urgent cases, you can contact us on IN DIEM 24-Hour Emergency Lawyers Phone: (+34) <strong>610 667 452.<\/strong> <\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4\"><strong>Did you know that Abogados IN DIEM offers online and expedited services?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We offer our clients the option of receiving assistance via video call or videoconference, as well as by phone, depending on their preference, so that the assistance is as personalized as possible, provided immediately, and without the need to travel. This service is complemented by communication via email, which facilitates the review and delivery of documentation. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition, for businesses and individuals, IN DIEM Abogados offers urgent services and 24-hour support for matters that require a quick response.<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color has-custom-font-size wp-element-button\" href=\"https:\/\/www.in-diem.com\/en\/online-lawyers-in-diem\/\" style=\"background-color:#33c0d6;font-size:15px\"><strong>Online Legal Advice<\/strong><\/a><\/div>\n\n\n\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color has-custom-font-size wp-element-button\" href=\"https:\/\/www.in-diem.com\/en\/24-horas\/\" style=\"background-color:#33c0d6;font-size:15px\"><strong>24-Hour Service and Urgent Requests<\/strong><\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4\">Would you like to know more about IN DIEM Abogados? Here is this short introductory video&#8230; <\/h2>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"In Diem Abogados Sevilla\" width=\"1280\" height=\"720\" src=\"https:\/\/www.youtube.com\/embed\/wQFpoA1gOfQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#0029a4\">To acknowledge some of you, here&#8217;s this <a href=\"https:\/\/www.proveedores.com\/proveedores\/abogados-in-diem-asesoramiento-personal-y-online-especializado\/\"><strong>link<\/strong><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can find us in Seville, Madrid, Las Palmas de Gran Canaria, M\u00e1laga, Tomares, Coria del R\u00edo, Dos Hermanas, Mairena del Alcor, Estepona, Marbella, and Mairena del Aljarafe. We look forward to serving you. <\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><!-- .vgblk-rw-wrapper -->","protected":false},"excerpt":{"rendered":"<p>Declaring cryptocurrencies in Spain remains one of the tax processes that generates the most doubts among taxpayers. In this guide, we analyze the most common mistakes users make\u2014from lack of traceability to confusion between forms 172, 173, and 721\u2014and how to avoid them in 2025 to prevent Tax Agency penalties. A clear, practical, and updated explanation to correctly fulfill your tax obligations and protect your digital assets.  <\/p>\n","protected":false},"author":3,"featured_media":21264,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"categories":[4269],"tags":[1367,1280,1748,1850,1370,1845,1361,1846,1358,1847,1793,1848],"class_list":["post-21263","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cryptocurrencies","tag-blockchain-analysis","tag-blockchain-traceability","tag-capital-gains","tag-crypto-declaration-mistakes","tag-crypto-investigation","tag-crypto-taxation","tag-cryptocurrencies","tag-cryptocurrency-taxes","tag-cryptoveritas-360","tag-fifo-method","tag-profit-trades-scam","tag-tax-authority-cryptocurrencies-form-172-173"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mistakes when declaring cryptocurrencies in Spain and how to avoid them<\/title>\n<meta name=\"description\" content=\"Common Mistakes When Reporting Cryptocurrencies in Spain and How to Avoid Them. 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Forms 172, 173, and 721. Avoid Penalties from the Tax Authority.","breadcrumb":{"@id":"https:\/\/www.in-diem.com\/en\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.in-diem.com\/en\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.in-diem.com\/en\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\/#primaryimage","url":"https:\/\/www.in-diem.com\/wp-content\/uploads\/2026\/05\/abogados-expertos-fiscalidad-criptomonedas-espana-1.avif","contentUrl":"https:\/\/www.in-diem.com\/wp-content\/uploads\/2026\/05\/abogados-expertos-fiscalidad-criptomonedas-espana-1.avif","width":1720,"height":968,"caption":"Avoid tax penalties: specialized legal advice identifies errors in your cryptocurrency reporting before the tax authorities do."},{"@type":"BreadcrumbList","@id":"https:\/\/www.in-diem.com\/en\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Portada","item":"https:\/\/www.in-diem.com\/en\/home\/"},{"@type":"ListItem","position":2,"name":"Common mistakes when declaring cryptocurrencies in Spain and how to avoid them"}]},{"@type":"WebSite","@id":"https:\/\/www.in-diem.com\/en\/#website","url":"https:\/\/www.in-diem.com\/en\/","name":"In-Diem Abogados","description":"Experiencia +","publisher":{"@id":"https:\/\/www.in-diem.com\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.in-diem.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.in-diem.com\/en\/#organization","name":"In Diem Abogados","url":"https:\/\/www.in-diem.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.in-diem.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.in-diem.com\/wp-content\/uploads\/2014\/03\/copy-logo-in-diem-header.jpg","contentUrl":"https:\/\/www.in-diem.com\/wp-content\/uploads\/2014\/03\/copy-logo-in-diem-header.jpg","width":154,"height":50,"caption":"In Diem Abogados"},"image":{"@id":"https:\/\/www.in-diem.com\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/es-es.facebook.com\/indiemabogados\/","https:\/\/x.com\/indiemabogados","https:\/\/es.linkedin.com\/company\/in-diem-abogados"]},{"@type":"Person","@id":"https:\/\/www.in-diem.com\/en\/#\/schema\/person\/3521ffc9872b4f465cff441ffb9ca6ee","name":"Administrador","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.in-diem.com\/wp-content\/litespeed\/avatar\/249c57f6cef8776a41680b487b938e9e.jpg?ver=1786489161","url":"https:\/\/www.in-diem.com\/wp-content\/litespeed\/avatar\/249c57f6cef8776a41680b487b938e9e.jpg?ver=1786489161","contentUrl":"https:\/\/www.in-diem.com\/wp-content\/litespeed\/avatar\/249c57f6cef8776a41680b487b938e9e.jpg?ver=1786489161","caption":"Administrador"},"url":"https:\/\/www.in-diem.com\/en\/author\/agustin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/posts\/21263","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/comments?post=21263"}],"version-history":[{"count":1,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/posts\/21263\/revisions"}],"predecessor-version":[{"id":21265,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/posts\/21263\/revisions\/21265"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/media\/21264"}],"wp:attachment":[{"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/media?parent=21263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/categories?post=21263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.in-diem.com\/en\/wp-json\/wp\/v2\/tags?post=21263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}