{"id":12018,"date":"2026-01-16T03:41:00","date_gmt":"2026-01-16T02:41:00","guid":{"rendered":"https:\/\/www.in-diem.com\/abogados\/uncategorized\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them"},"modified":"2026-03-14T13:45:56","modified_gmt":"2026-03-14T12:45:56","slug":"common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them","status":"publish","type":"post","link":"https:\/\/www.in-diem.com\/en\/abogados\/cryptocurrencies\/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":"\n<p><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>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>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>1. Not declaring crypto-to-crypto swaps<\/strong><\/h3>\n\n<p>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><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\"><strong>You must declare the gain or loss based on the market value at the time of the swap.<\/strong><\/p>\n\n<p><strong><strong>\u2714<\/strong><\/strong> <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><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>2. Incorrect application of the FIFO method<\/strong><\/h3>\n\n<p>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><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>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><strong>\u2714<\/strong> <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><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>3. Omitting purchase, sale, and transfer commissions<\/strong><\/h3>\n\n<p><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><strong>\u2714<\/strong> <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>4. Declaring only gains and omitting losses<\/strong><\/h3>\n\n<p>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><strong>\u2714<\/strong> <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\"><strong>IN DIEM<\/strong> blog.<\/a> <\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading has-medium-font-size\"><strong>5. Not declaring cryptocurrency income (staking, airdrops, salaries)<\/strong><\/h3>\n\n<p>Income received in cryptocurrencies, even if not immediately converted to euros, constitutes taxable income that must be declared at its 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><strong>\u2714<\/strong> <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>6. Confusing internal transfers between own wallets with sales<\/strong><\/h3>\n\n<p>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><strong><strong>\u2714<\/strong><\/strong> <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>7. Not keeping supporting documentation<\/strong><\/h3>\n\n<p>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>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><strong>\u2714<\/strong> <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>8. Declaring cryptocurrencies on form 720 when it is not appropriate<\/strong><\/h3>\n\n<p>Many taxpayers confuse form 720 and 721. It is essential to understand their differences: <\/p>\n\n<p><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\" style=\"font-size:14px\"><strong>Cryptocurrencies are NOT declared on this form.<\/strong><\/p>\n\n<p><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><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>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><strong>\u2714<\/strong> <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>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>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>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\"><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>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>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<div style=\"max-width:100%; margin:40px auto; font-family:Segoe UI, Arial, sans-serif; box-shadow:0 20px 60px rgba(0,0,0,.2); background:#fff; overflow:hidden;\">\n\n  <!-- HEADER -->\n  <div style=\"background:linear-gradient(135deg,#0A3151,#0d4165); padding:50px 40px; text-align:center;\">\n    <div style=\"color:#fff; font-size:28px; font-weight:700;\">\n IN DIEM ABOGADOS <span style=\"color:#33B4D6;\">+<\/span>\n <span style=\"color:#33B4D6; font-size:20px;\">Cryptoveritas 360<\/span>\n    <\/div>\n    <h2 style=\"color:#fff; font-size:42px; margin:30px 0 10px;\">MISTAKES WHEN DECLARING<br\/>CRYPTOCURRENCIES<\/h2>\n    <p style=\"color:#33B4D6; font-size:22px; font-weight:600;\">Spain Guide 2025<\/p>\n  <\/div>\n\n  <!-- CONTENT -->\n  <div style=\"padding:50px 40px;\">\n\n    <div style=\"background:#0A3151; color:#fff; font-size:24px; font-weight:700; padding:20px; border-left:8px solid #33B4D6; margin-bottom:30px; text-align:center;\">\n \u26a0\ufe0f 8 MOST COMMON MISTAKES\n    <\/div>\n\n    <!-- ERRORS GRID -->\n    <div style=\"display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:25px;\">\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>1. Crypto-to-crypto swaps<\/strong><br\/> Each BTC\u2192ETH generates a taxable event\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>2. Incorrectly applied FIFO method<\/strong><br\/> A unified list per crypto across all exchanges\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>3. Forgetting commissions<\/strong><br\/> Include all fees in your calculations\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>4. Only declaring gains<\/strong><br\/> Losses offset for up to 4 years\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>5. Staking and airdrops<\/strong><br\/> Declare market value upon receipt\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>6. Own transfers<\/strong><br\/> Exchange \u2192 wallet is not a sale\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>7. No documentation<\/strong><br\/> Keep proof for at least 4 years\n      <\/div>\n\n      <div style=\"background:#E6E6E6; padding:25px; border-left:5px solid #33B4D6;\">\n        <strong>8. Form 720 vs 721<\/strong><br\/> Crypto goes on 721 only if >\u20ac50,000 abroad\n      <\/div>\n\n    <\/div>\n\n    <!-- RECOMMENDATIONS -->\n    <div style=\"background:linear-gradient(135deg,#33B4D6,#2a9ab8); padding:40px; margin-top:50px; border-radius:10px;\">\n      <h3 style=\"color:#fff; text-align:center; margin-bottom:25px;\">\u2713 KEY RECOMMENDATIONS<\/h3>\n      <ul style=\"list-style:none; padding:0; color:#0A3151;\">\n        <li style=\"background:#fff; padding:15px; margin-bottom:10px;\">\ud83d\udcca Export the full history of all your exchanges<\/li>\n        <li style=\"background:#fff; padding:15px; margin-bottom:10px;\">\ud83d\udd27 Use specialized tools for FIFO calculation<\/li>\n        <li style=\"background:#fff; padding:15px; margin-bottom:10px;\">\ud83d\udcdd Record all operations<\/li>\n        <li style=\"background:#fff; padding:15px;\">\ud83d\udc68\u200d\u2696\ufe0f Consult advisors specialized in crypto taxation<\/li>\n      <\/ul>\n    <\/div>\n\n  <\/div>\n\n  <!-- FOOTER -->\n  <div style=\"background:#0A3151; padding:40px; text-align:center;\">\n    <p style=\"color:#fff; font-size:22px; font-weight:700;\">Do you need professional tax advice?<\/p>\n    <p style=\"color:#33B4D6; font-size:18px;\">www.in-diem.com<\/p>\n  <\/div>\n\n<\/div>\n\n\n\n<h2 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><\/h2>\n<\/div><\/div>\n\n<p>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><strong>Our services include:<\/strong><\/p>\n\n<p><strong>\u2714 Complete Crypto Tax Reports<\/strong>: With detailed traceability, correct tax classification, and support before the Tax Agency.<\/p>\n\n<p><strong>\u2714 Advice for submitting the 2025 Income Tax Return<\/strong>: We prepare and submit your IRPF in a secure and optimized manner.<\/p>\n\n<p><strong>\u2714 Regularization of previous years<\/strong>: Full reconstruction of complex histories, wallets, and movements.<\/p>\n\n<p><strong>\u2714 Defense against requirements or penalties<\/strong>: We respond to the Tax Agency for you with all the necessary legal documentation.<\/p>\n\n<p><strong>\u2714 Personalized attention by an expert lawyer: <\/strong>Direct 24\/7 contact to resolve doubts and accompany you throughout the process.<\/p>\n\n<p><strong>\u2714 Maximum confidentiality and professionalism<\/strong>: Your information will be treated with absolute rigor.<\/p>\n\n<p><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\"><strong>Contact us. We are here to help you. <\/strong><\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n<h2 class=\"wp-block-heading has-text-color\" style=\"color:#0029a4;font-size:22px;font-style:normal;font-weight:400\"><strong>Frequently Asked Questions (FAQs)<\/strong><\/h2>\n<p><div class=\"gdlr-shortcode-wrapper\"><div class=\"gdlr-item gdlr-accordion-item style-1\"  ><div class=\"accordion-tab active pre-active\" ><h4 class=\"accordion-title\" ><i class=\"icon-minus\" ><\/i><span>\u00bfDebo declarar las permutas entre criptomonedas aunque no convierta a euros?<\/span><\/h4><div class=\"accordion-content\"><p>S\u00ed. Cada intercambio entre criptomonedas \u2014por ejemplo, cambiar BTC por ETH\u2014 genera un hecho imponible.<\/p>\n<p>Hacienda lo considera como una **venta + compra**, por lo que debes calcular la ganancia o p\u00e9rdida patrimonial en el momento de la permuta.<\/p>\n<p>Este es uno de los errores m\u00e1s comunes y uno de los que Hacienda detecta con m\u00e1s facilidad al cruzar la informaci\u00f3n de los modelos 172 y 173.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfC\u00f3mo aplico el m\u00e9todo FIFO cuando tengo criptomonedas en varios exchanges?<\/span><\/h4><div class=\"accordion-content\"><p>El m\u00e9todo FIFO debe aplicarse **de forma global por cada criptomoneda**, sin importar en qu\u00e9 plataforma est\u00e9.<\/p>\n<p>Es decir: todos tus BTC, est\u00e9n en Binance, Coinbase o una wallet personal, forman una **\u00fanica cola FIFO**.<\/p>\n<p>Cuando vendes BTC en cualquier plataforma, se consideran vendidos los primeros BTC que compraste, est\u00e9n donde est\u00e9n.<\/p>\n<p>Aunque existe cierta controversia judicial, Hacienda sigue exigiendo FIFO como criterio aplicable.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfLas comisiones de compra y venta se pueden deducir?<\/span><\/h4><div class=\"accordion-content\"><p>S\u00ed. Todas las comisiones directamente relacionadas con la compra o venta de criptomonedas son deducibles:<\/p>\n<p>\u2022 Las comisiones de compra **aumentan** el valor de adquisici\u00f3n.<\/p>\n<p>\u2022 Las comisiones de venta **reducen** el importe obtenido.<\/p>\n<p>Incluirlas correctamente evita discrepancias con los datos que reportan los exchanges en los modelos informativos.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfC\u00f3mo debo declarar las recompensas por staking y los airdrops?<\/span><\/h4><div class=\"accordion-content\"><p>Las recompensas de staking y los airdrops se consideran **ingresos** y deben declararse por su valor de mercado en la fecha de recepci\u00f3n.<\/p>\n<p>\u2022 Staking \u2192 rendimientos del capital mobiliario (base del ahorro, 19-28%).<\/p>\n<p>\u2022 Airdrops \u2192 tambi\u00e9n ingresos valorados al precio de mercado del d\u00eda recibido.<\/p>\n<p>Ese valor ser\u00e1 tu coste de adquisici\u00f3n cuando posteriormente los vendas o permutes.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfLas transferencias entre mis propias wallets debo declararlas?<\/span><\/h4><div class=\"accordion-content\"><p>No. Las transferencias internas **no generan ganancia ni p\u00e9rdida**, por lo que no deben declararse.<\/p>\n<p>Pero s\u00ed debes guardar pruebas: direcci\u00f3n de origen\/destino, hash, fecha, importe\u2026<\/p>\n<p>Si no puedes justificar que el movimiento es interno, Hacienda podr\u00eda interpretarlo como una venta.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfCu\u00e1nto tiempo debo conservar la documentaci\u00f3n de mis operaciones con criptomonedas?<\/span><\/h4><div class=\"accordion-content\"><p>Debes conservar toda la documentaci\u00f3n durante **al menos 4 a\u00f1os**, incluyendo:<\/p>\n<p>\u2022 Extractos bancarios<\/p>\n<p>\u2022 Historias completos de exchanges<\/p>\n<p>\u2022 Hashes de transacciones<\/p>\n<p>\u2022 Justificantes de compra\/venta<\/p>\n<p>\u2022 Capturas verificables<\/p>\n<p>Si no puedes acreditar el origen o el coste de adquisici\u00f3n, Hacienda puede considerar que **toda la venta es ganancia**.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfDebo presentar el modelo 720 o el modelo 721 por mis criptomonedas?<\/span><\/h4><div class=\"accordion-content\"><p>El modelo 720 **no incluye criptomonedas**.<\/p>\n<p>Debes presentar el **modelo 721** \u00fanicamente si:<\/p>\n<p>\u2022 Tus criptomonedas est\u00e1n custodiadas por un tercero en el extranjero, y<\/p>\n<p>\u2022 El valor conjunto supera **50.000 \u20ac** a 31 de diciembre.<\/p>\n<p>Las wallets de autocustodia (Ledger, Trezor, MetaMask&#8230;) **no** se incluyen.<\/p>\n<p>El plazo: del 1 de enero al 31 de marzo del a\u00f1o siguiente.<\/p>\n<\/div><\/div><div class=\"accordion-tab\" ><h4 class=\"accordion-title\" ><i class=\"icon-plus\" ><\/i><span>\u00bfQu\u00e9 debo hacer si ya declar\u00e9 mal ejercicios anteriores?<\/span><\/h4><div class=\"accordion-content\"><p>Lo ideal es regularizar **antes de que Hacienda act\u00fae**.<\/p>\n<p>Puedes presentar una declaraci\u00f3n complementaria o extempor\u00e1nea, lo que reduce mucho las sanciones.<\/p>\n<p>Si Hacienda detecta los errores por su cuenta, las sanciones son bastante mayores.<\/p>\n<p>Lo m\u00e1s recomendable es consultar con un especialista en fiscalidad cripto para evaluar tu caso y planificar la regularizaci\u00f3n con seguridad jur\u00eddica.<\/p>\n<\/div><\/div><\/div><\/div><\/p>\n<p><div class=\"gdlr-shortcode-wrapper\"><div class=\"clear\"><\/div><div class=\"gdlr-item gdlr-divider-item\"  ><div class=\"gdlr-divider double-dotted\" ><\/div><\/div><\/div><\/p>\n\n<h2 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><\/h2>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cryptoveritas360.com\/investigacion-y-recuperacion-cripto\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"518\" src=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-1024x518.webp\" alt=\"Crypto Financial Technological Intelligence. Cryptoveritas 360. \" class=\"wp-image-8951\" srcset=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-1024x518.webp 1024w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-300x152.webp 300w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-768x388.webp 768w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-1536x777.webp 1536w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-100x51.webp 100w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-750x380.webp 750w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360-600x303.webp 600w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2025\/11\/Inteligencia-tecnologica-financiera-Critpo-Cryptoveritas-360.webp 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<p><div class=\"gdlr-shortcode-wrapper\"><div class=\"clear\"><\/div><div class=\"gdlr-item gdlr-divider-item\"  ><div class=\"gdlr-divider solid\" ><\/div><\/div><\/div><\/p>\n\n<h2 class=\"wp-block-heading has-text-color has-medium-font-size\" style=\"color:#0029a4;font-style:normal;font-weight:400\"><strong>Publications on Crypto on Our Blog <\/strong><\/h2>\n<p><div class=\"gdlr-shortcode-wrapper\"><div class=\"clear\"><\/div><div class=\"gdlr-item gdlr-divider-item\"  ><div class=\"gdlr-divider solid\" ><\/div><\/div><\/div><\/p>\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>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>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>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>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<h2 class=\"wp-block-heading has-text-color has-medium-font-size\" style=\"color:#0029a4\"><strong>Did you know that IN DIEM Abogados offers an online service and an urgent service?<\/strong><\/h2>\n\n<p>We offer our clients the option of being assisted via video call or videoconference, as well as by telephone, according to our clients\u2019 preference, so that the assistance is as personal as possible, with absolute immediacy, without the need to travel. This service is complemented by communication via email, which facilitates the analysis and delivery of documentation. <\/p>\n\n<p>Likewise, we offer urgent and 24-hour services for our companies, handling national and international contracting operations.<\/p>\n\n<p class=\"has-text-color\" style=\"color:#0029a4\">For more information on the Online Legal Advisory Service<strong> <a href=\"https:\/\/www.in-diem.com\/en\/online-lawyers-in-diem\">HERE<\/a><\/strong>, the 24-hour and Urgent Service,<strong> <a href=\"https:\/\/www.in-diem.com\/en\/urgent-24-hour-lawyers-tel-610-667-452\">HERE<\/a><\/strong>, and some recognitions, we leave you this <a href=\"https:\/\/www.proveedores.com\/proveedores\/abogados-in-diem-asesoramiento-personal-y-online-especializado\/\"><strong>link<\/strong><\/a>.<\/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<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.in-diem.com\/en\/online-lawyers-in-diem\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"5475\" src=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-1024x576.jpg\" alt=\"\" class=\"wp-image-5475\" srcset=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-1024x576.jpg 1024w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-600x338.jpg 600w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-300x169.jpg 300w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-768x432.jpg 768w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-1536x864.jpg 1536w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892-100x56.jpg 100w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2020\/03\/Asesoramiento-ON-LINE-Abogados-IN-DIEM-Videoconferencia-Telefono-916353892.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Online Legal Advice<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.in-diem.com\/en\/urgent-24-hour-lawyers-tel-610-667-452\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"465\" data-id=\"4350\" src=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b-1024x465.jpg\" alt=\"24-hour Emergency Lawyer IN DIEM - Seville Malaga Huelva Madrid Las Palmas Dos Hermanas Mairena Coria de Rio\" class=\"wp-image-4350\" srcset=\"https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b-1024x465.jpg 1024w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b-600x273.jpg 600w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b-300x136.jpg 300w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b-768x349.jpg 768w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b-100x45.jpg 100w, https:\/\/www.in-diem.com\/wp-content\/uploads\/2018\/09\/Abogado-24-horas-Urgente-IN-DIEM-Sevilla-Malaga-Huelva-Madrid-Las-Palmas-Dos-Hermanas-Mairena-Coria-de-Rio-2b.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">24-hour and Urgent Legal Service <\/figcaption><\/figure>\n<\/figure>\n<\/div><\/div>\n\n<p><\/p>\n\n<h2 class=\"wp-block-heading has-text-color has-medium-font-size\" style=\"color:#0029a4\">Anything else about IN DIEM Lawyers? Here&#8217;s a short presentation video&#8230; <\/h2>\n<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/wQFpoA1gOfQ?wmode=transparent\" width=\"620\" height=\"348\" ><\/iframe><\/p>\n<p><div class=\"gdlr-shortcode-wrapper\"><div class=\"clear\"><\/div><div class=\"gdlr-item gdlr-divider-item\"  ><div class=\"gdlr-divider solid\" ><\/div><\/div><\/div><\/p>\n\n<p>You will find us in Seville, Madrid, Las Palmas de Gran Canaria, M\u00e1laga, Huelva, Punta Umbr\u00eda, Tomares, Coria del R\u00edo, Dos Hermanas, Mairena del Alcor, Estepona, Marbella, Mairena del Aljarafe&#8230; it will be a pleasure to serve you&#8230;!!<\/p>\n","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":12019,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[1278,1826],"tags":[1367,1280,1748,1850,1370,1845,1361,1846,1358,1847,1793,1848],"class_list":["post-12018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cryptocurrencies","category-tax-liability","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"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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=\"Discover the most frequent mistakes when declaring cryptocurrencies in Spain and how to avoid them in 2025. Clear explanation of forms 172, 173, and 721. Avoid Tax Agency penalties with these recommendations.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.in-diem.com\/en\/abogados\/cryptocurrencies\/common-mistakes-when-declaring-cryptocurrencies-in-spain-and-how-to-avoid-them\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mistakes when declaring cryptocurrencies in Spain and how to avoid them\" \/>\n<meta property=\"og:description\" content=\"Discover the most frequent mistakes when declaring cryptocurrencies in Spain and how to avoid them in 2025. Clear explanation of forms 172, 173, and 721. 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