How many transaction confirmations are considered safe?

To ensure a reasonable level of security for transactions, experts recommend waiting for six (6) confirmations, though additional confirmations may be necessary during periods of network congestion.

Feb 21, 2025 at 09:30 pm

Key Points

• Understanding Transaction Confirmations
• Factors Influencing Confirmation Time
• Safe Number of Confirmations
• Impact of Network Congestion
• Verification and Settlement Times

How Many Transaction Confirmations Are Considered Safe?

In the realm of cryptocurrencies, a transaction confirmation refers to the acknowledgment and verification of a transaction by the decentralized network. As a network of independent nodes, each transaction must be recorded in multiple blocks within the blockchain before it is deemed final and irreversible. The number of confirmations required for a transaction to be considered safe varies depending on the specific cryptocurrency and network conditions.

Factors Influencing Confirmation Time

• Block Size: Each blockchain has a predefined block size, limiting the number of transactions that can be included in a single block. Larger block sizes lead to faster confirmation times.
• Network Traffic: The volume of transactions on the network can significantly impact confirmation times. During periods of high traffic, transactions may take longer to be processed and confirmed.
• Transaction Fees: In some cryptocurrencies, paying higher transaction fees can prioritize your transaction, leading to quicker confirmations.

Safe Number of Confirmations

The consensus among experts is that six (6) confirmations provide a reasonable level of security for most transactions. This number allows ample time for the transaction to be included in multiple blocks and thoroughly propagated across the network, reducing the risk of reversals or double-spends.

Impact of Network Congestion

During periods of high network congestion, confirmation times can increase substantially. In such instances, it may be necessary to wait for more than six (6) confirmations to ensure transaction finality. One blockchain explorer, blockchain.com, recommends up to 10 confirmations for Bitcoin (BTC) and up to 27 confirmations for Ethereum (ETH) during congested periods.

Verification and Settlement Times

Transaction confirmations are not to be confused with settlement times, which refer to the point at which the transaction is considered fully settled and complete. For many cryptocurrencies, confirmation is a prerequisite for settlement. However, the settlement time may vary based on factors such as exchange policies and regulations.

FAQs

• What is a transaction confirmation? A confirmation is an acknowledgment by the decentralized network that a transaction has been recorded in the blockchain and is awaiting inclusion in a block.
• How many confirmations are enough? For most transactions, it is recommended to wait for six (6) confirmations to ensure transaction finality. However, during periods of high network congestion, additional confirmations may be required.
• What are the factors that influence confirmation time? Block size, network traffic, and transaction fees can impact confirmation times.
• Is six confirmations enough during network congestion? During periods of high network congestion, it may be necessary to wait for more than six (6) confirmations to ensure transaction settlement.