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What happens when you send Bitcoin
Bitcoin does not move between software accounts in the same way a bank transfer moves money between account balances. The blockchain records transactions that spend earlier outputs and create new ones. Your wallet keeps track of outputs it can spend and uses one or more of them as inputs when you make a payment.
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Each input refers to bitcoin created by an earlier transaction. The wallet proves that it is authorized to spend those inputs by signing the new transaction with the relevant private key. The transaction specifies the outputs: usually one for the recipient and, if the inputs add up to more than the payment plus fee, another returning the remainder to you as change. The sum of the outputs cannot exceed the sum of the inputs. The difference is the fee available to the miner who includes the transaction.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesOnce signed, the transaction is broadcast to Bitcoin’s peer-to-peer network. Nodes check that it follows the rules, including that its inputs are valid and have not already been spent. A recipient’s wallet may detect the transaction before it has been mined, but that early notice is not the same as a confirmed payment. Confirmation means inclusion in a block.
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The stages at a glance
| Stage | What it means | What it does not mean |
|---|---|---|
| Created and signed | Your wallet has assembled the inputs and outputs and authorized the spend. | The network has not necessarily received it. |
| Broadcast and unconfirmed | Nodes may relay the transaction, and wallets may show it as pending. | It is not yet recorded in a block; the recipient may not treat it as final. |
| Included in a block | The transaction has its first confirmation. | It does not make reversal mathematically impossible. |
| More blocks added | Each subsequent block adds a confirmation and more work behind the transaction. | There is no single confirmation count required for every payment or service. |
Why Bitcoin transaction fees change
A Bitcoin fee is primarily a payment for scarce block space. Transactions are measured by their data size, and wallets commonly express fee rates in satoshis per virtual byte, abbreviated sat/vB. The fee is approximately the transaction’s virtual size multiplied by the chosen fee rate. It is not a percentage of the bitcoin amount.
Transaction size varies with the number and type of inputs and outputs. Spending several small outputs generally requires more transaction data than spending one suitable output. Creating multiple outputs can also add data. Bitcoin.org’s fee explainer gives about 140 virtual bytes as an illustrative size for a simple payment with one input and two outputs. That is an example, not a universal size: the actual transaction depends on its construction and input types.
Block space is limited, and transactions compete to be included. When demand is high, users often need to offer a higher fee rate to compete for timely inclusion; when demand eases, lower rates may be sufficient. Bitcoin.org’s Developer Guide describes miners prioritizing transactions by fee per byte. A larger payment amount alone does not make the transaction larger, although the wallet may select different inputs to fund it.
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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Wallet fee suggestions are estimates, not promises. Different wallets can produce different estimates, and a suggested rate cannot guarantee a particular confirmation time. Bitcoin.org’s fee page relies on live estimates, so a remembered figure or static guide is not a dependable quote for a future send. Check the amount and timing estimate shown by your wallet immediately before sending.
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What to consider before choosing a fee
- Urgency: If the payment can wait, you may be comfortable choosing a lower priority estimate; if timing matters, weigh the wallet’s faster option against its higher cost.
- Transaction size: A wallet that shows a fee rate and a total fee lets you see both the price per virtual byte and the fee for this particular transaction.
- Network conditions: The same fee rate can compete differently as the amount of pending demand changes.
- Ability to adjust later: Check whether your wallet supports Replace-by-Fee (RBF) before relying on it as a way to raise a fee after broadcast.
Do not confuse the fee rate with the total fee. A rate is multiplied by transaction size, so two transactions sent at the same sat/vB can cost different amounts if their sizes differ.
How long confirmations take
A transaction gets its first confirmation when it is included in a block. Every block found afterward adds another confirmation. Bitcoin.org says new blocks are added approximately every 10 minutes on average. That is an average across block discovery, not a countdown or service-level guarantee for your individual transaction.
Block discovery is probabilistic: an individual block may arrive sooner or later than the average interval. A transaction may be included in the next block, or it may wait through multiple blocks, particularly if its fee rate is not competitive with other pending transactions. There is no guaranteed minimum or maximum wait for an on-chain confirmation.
People sometimes cite six confirmations as a threshold. Bitcoin.org’s FAQ notes it as a commonly cited figure, but it is not a universal rule. A recipient, exchange, merchant, or other service decides how much confirmation history it requires for its own risk tolerance and payment context. A small, reversible purchase and a high-value settlement need not be judged by the same standard.
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If your transaction is still unconfirmed
An unconfirmed transaction may be waiting in a node’s mempool, the pool of transactions that the node has heard about but that are not yet included in a block. A low fee relative to current demand is one reason it may take longer. Pending status alone does not show that the bitcoin has been permanently lost or that the recipient has received a confirmed payment.
Options for a pending send
- Check the wallet’s transaction details. Confirm that the transaction is actually broadcast and review its status and fee information. Wallet labels and available actions differ.
- Decide whether waiting is acceptable. If the payment is not urgent, it may be reasonable to leave the transaction pending rather than change anything.
- Look for RBF support in the sending wallet. If the original transaction was sent with Replace-by-Fee support and the wallet offers a replacement action, it may let you create a replacement with a higher fee. Follow that wallet’s own instructions; the process is not identical across wallets.
- Ask the recipient how it handles pending payments. The recipient may see an unconfirmed transaction, but whether it accepts it before block inclusion is a separate policy decision.
- If the transaction disappears, verify before retrying. Bitcoin.org says an unconfirmed transaction can eventually be dropped. If it never confirmed, its inputs remain spendable. Wallets handle dropped transactions and recovery differently, so consult the wallet’s documentation and verify the transaction state before attempting another payment.
A transaction dropping from one node’s mempool does not by itself prove that every node has forgotten it or that a wallet has updated its view. Do not assume a universal recovery sequence: wallet implementation, transaction settings, and network conditions affect what actions are available.
What a Bitcoin transaction reveals
Bitcoin’s blockchain is a public, persistent record. People can inspect transactions, amounts, and the links between transaction inputs and outputs. Addresses are pseudonymous identifiers, not names, but patterns can sometimes associate addresses and payments. Address reuse makes those links easier to observe.
Using a fresh receiving address for each payment can reduce straightforward links between payments. Bitcoin wallets may also generate fresh change addresses. This practice improves some aspects of privacy, but it does not erase the public transaction history or make the user anonymous. Once an address is associated with a person through a payment, public post, or other information, related activity may become easier to interpret.
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On-chain privacy also depends on the wallet’s connection to blockchain data. Bitcoin Core’s privacy guidance explains that lightweight wallets may ask peers or servers for information about addresses or transactions. The service handling those queries may learn which addresses are relevant to a user and infer relationships among transactions. A full node can reduce reliance on a third-party blockchain-data provider by maintaining and querying its own blockchain data, but it requires setup and resources. These points describe the relevant wallet architectures; they should not be assumed to apply identically to every current wallet.
Bitcoin.org notes that Tor can help disassociate online activity from an IP address. That can address part of the connection-privacy picture, but it does not prevent the on-chain transaction from being visible or guarantee that it cannot be linked to a person.
Privacy questions to ask about a wallet
- Who controls the private keys, and how are they backed up?
- Does the wallet create fresh receiving and change addresses, and does it avoid address reuse?
- Does it query a company’s server, other peers, or a node you operate for wallet-related data?
- Can it make and broadcast transactions without revealing wallet queries to a third-party data provider?
- What setup and recovery steps are needed if you use your own node or additional privacy tools?
These questions are more useful than treating a wallet as simply “private” or “not private.” Key control, transaction broadcasting, address practices, and blockchain-data queries are separate parts of the trade-off.
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On-chain Bitcoin and Lightning are different payment paths
An on-chain payment is a transaction recorded in the Bitcoin blockchain and competes for block space. Lightning is a payment layer built on Bitcoin that Bitcoin.org describes as intended for near-instant, typically lower-cost small and frequent payments. Lightning uses payment channels, which later settle to the Bitcoin blockchain. The two paths have different payment mechanics; a wallet’s support and the intended use matter when choosing between them.
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| Question | On-chain payment | Lightning payment |
|---|---|---|
| Where does the payment occur? | In a transaction recorded on the Bitcoin blockchain. | On a payment layer using channels, with channel settlement later recorded on-chain. |
| Typical use described by Bitcoin.org | A direct blockchain payment; timing depends on block inclusion and fee competition. | Small, frequent payments where near-instant settlement and typically lower cost are useful. |
| What should you check? | Fee estimate, transaction status, and the recipient’s confirmation requirements. | Whether both wallets support Lightning and how the wallet handles channel payments and settlement. |
Lightning is not simply an on-chain transaction with a different fee setting. Before sending, make sure the recipient provided an address or payment request for the same payment path your wallet is using.
Wallet control, recovery, and hardware devices
A wallet manages the keys that control funds; the coins themselves remain represented by blockchain outputs. Wallets range from mobile applications to dedicated hardware devices. A hardware wallet can be one way to keep key operations on a separate device, but it does not alter the network fee, speed up block discovery, or make an on-chain transaction private. No particular device is necessary to understand or complete the send described here.
When choosing wallet software or a device, separate the questions that are often bundled together: who can authorize a spend, how the wallet estimates and lets you adjust fees, whether it supports fee bumping, what data its servers or peers can learn, and how you will recover access. Before relying on a feature such as RBF, fresh-address generation, or self-hosted-node support, check current documentation for the specific wallet and version. Recovery complexity is a practical cost of a setup with more control; a feature is only useful if you can operate it safely.
Quick Recap
A practical pre-send checklist
- Verify the recipient’s address or payment request and confirm that you are using the intended payment network.
- Review the wallet’s total fee and fee rate; consider the urgency and the current estimate rather than judging by the bitcoin amount.
- Check whether the wallet will create a change output and whether its displayed total reflects the full transaction.
- Understand whether the payment will be visible as pending before it is confirmed and what confirmation policy the recipient applies.
- If privacy matters, avoid address reuse and understand which service or node your wallet contacts for blockchain data.
- Keep the wallet’s recovery method available and use its documentation for wallet-specific fee changes or recovery steps.
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