Utxo Model How Bitcoin Transactions Really Work
Bitcoin Basics · 60 seconds
Key takeaways
- Bitcoin uses UTXOs—unspent outputs—not accounts like banks
- Each transaction consumes old UTXOs and creates new ones
- You control UTXOs with private keys, not usernames
- Change gets returned to you, just like cash transactions
Full explainer
Why does Bitcoin feel so different from your bank account? Because it doesn't work like one. Bitcoin uses something called UTXOs—unspent transaction outputs. Think of them as digital coins sitting in your wallet. When you send Bitcoin, you're actually selecting one or more of these coins, spending them entirely, and creating new coins in return. It's exactly like cash: you hand over a fifty-dollar bill and get change back. Your private key is your permission slip to spend these UTXOs. No username, no login—just cryptography. This model is why Bitcoin is transparent and unstoppable.