{"id":8066,"date":"2025-07-18T13:20:26","date_gmt":"2025-07-18T13:20:26","guid":{"rendered":"https:\/\/paybis.com\/blog\/?post_type=glossary&p=8066"},"modified":"2025-07-18T13:20:27","modified_gmt":"2025-07-18T13:20:27","slug":"unspent-transaction-output","status":"publish","type":"glossary","link":"https:\/\/paybis.com\/blog\/glossary\/unspent-transaction-output\/","title":{"rendered":"Unspent Transaction Output (UTXO)"},"content":{"rendered":"

<\/a>What is an Unspent Transaction Output (UTXO)?<\/h2>\n

An Unspent Transaction Output (UTXO) refers to a chunk of cryptocurrency that is available to be spent in a future transaction. In UTXO-based blockchains like Bitcoin, transactions are made up of inputs (spent outputs) and outputs (new UTXOs).<\/p>\n

Rather than updating account balances, Bitcoin tracks coins by creating and consuming UTXOs, like digital change from previous transactions. If you send part of your Bitcoin, the leftover portion becomes a new UTXO in your wallet.<\/p>\n

Understanding UTXOs is essential for grasping how Bitcoin<\/a> and similar cryptocurrencies manage value, verify ownership, and prevent double spending<\/a>.<\/p>\n

<\/a>Defining the Background of UTXO<\/h2>\n

The UTXO model was introduced with Bitcoin in 2009 and is still used by many major blockchains today, including Litecoin and Bitcoin Cash. It was designed for simplicity and transparency, allowing every node to independently verify each coin\u2019s ownership without needing a central authority.<\/p>\n

Unlike the account-based model used in Ethereum, UTXO systems treat coins more like digital cash, each output is a standalone unit of value. When a user makes a transaction, they “spend” one or more UTXOs and create new ones as change.<\/p>\n

<\/a>UTXO Usage<\/h2>\n

UTXOs play a crucial role in transaction building, wallet<\/a> design, and blockchain validation. Wallets must select appropriate UTXOs to cover a transaction’s total value and optimize for privacy, fees, and efficiency.<\/p>\n

Advanced uses of UTXOs include CoinJoin (for transaction privacy), batching (to reduce fees), and multi-signature transactions. In practice, users don\u2019t need to manage UTXOs manually, wallet software handles that behind the scenes.<\/p>\n","protected":false},"excerpt":{"rendered":"

An Unspent Transaction Output (UTXO) is the amount of cryptocurrency remaining after a transaction, which can be used as input in a future transaction. It\u2019s how blockchains like Bitcoin track spendable balances.<\/p>\n","protected":false},"featured_media":0,"template":"","glossary_letter":[300],"glossary_term":[276,277,285],"class_list":["post-8066","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"\nWhat is Unspent Transaction Output (UTXO) - Paybis<\/title>\n<meta name=\"description\" content=\"Learn how UTXOs form the foundation of Bitcoin and similar blockchains by tracking spendable coins in every transaction.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/paybis.com\/blog\/glossary\/unspent-transaction-output\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Unspent Transaction Output (UTXO) - Paybis\" \/>\n<meta property=\"og:description\" content=\"Learn how UTXOs form the foundation of Bitcoin and similar blockchains by tracking spendable coins in every transaction.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/paybis.com\/blog\/glossary\/unspent-transaction-output\/\" \/>\n<meta property=\"og:site_name\" content=\"Paybis Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Paybis\/\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-18T13:20:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/paybis.com\/blog\/wp-content\/uploads\/2023\/07\/og-individuals.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@paybis_com\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/paybis.com\/blog\/glossary\/unspent-transaction-output\/\",\"url\":\"https:\/\/paybis.com\/blog\/glossary\/unspent-transaction-output\/\",\"name\":\"What is Unspent Transaction Output (UTXO) - 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