Blockchain confirmations

What is a blockchain confirmation?

A blockchain confirmation counts the blocks added after the one that records your transaction. Each additional block strengthens the record, making your transfer harder to change or remove from the ledger.

Transactions are collected into blocks. These blocks connect in sequence, forming the blockchain. When your transaction first appears in a block, it's earned its first confirmation. Each new block stacked on top adds another. Services tend to wait for several confirmations for extra safety. If you want a clear overview of these basics, see how a blockchain works.

How many confirmations are needed, and how long they take

The answer varies. Each blockchain sets its own pace, and services decide how many confirmations they want for any coin or token before allowing access to incoming funds. On Bitcoin, a new block usually arrives around every ten minutes, so the required confirmations can mean waiting an hour or more. Not every blockchain works at that speed; some add blocks much faster.

The key detail here is that the required count is set by the service you're sending to, not the blockchain itself. Check the wallet or exchange deposit screen for the figure. Some platforms set a higher minimum for bigger sums. Requirements change sometimes, so it’s a good habit to look up the latest number before sending any money.

Example: waiting for a deposit to credit

Let’s say you’re sending coins to an exchange that lists 'six confirmations required.' With ten-minute Bitcoin blocks, that means an hour of waiting if the network runs smoothly. Network congestion, or sending with a low fee, can make it take longer.

Your money isn’t lost during this time. The exchange will not show the deposit in your balance until it’s fully confirmed, but that’s standard for every legitimate service using this kind of technology.

Why confirmations matter for security and timing

Platforms rely on confirmations to lower their risk, because reversing a transaction with more blocks above it is a lot more complicated and unlikely. Double-check the receiver's address and the amount before you send, since confirmed payments are difficult to undo.

Watching confirmations is also useful for tracking your payment's status using a blockchain explorer. If your transfer appears stuck with no confirmations, take a look at our detailed support page on pending transactions.

Quick note: digital asset prices can move quite a bit in an hour. Delays may affect the value you receive, so keep market changes in mind if timing matters for your transfer.

Frequently asked questions