Confirmations
How many confirmations does Base need?
Unheld credits a payment on Base at a confirmation depth of 12, which the network reaches about 24 seconds after the payment is first included in a block. Unheld’s own detection and checks add a few seconds.
What Unheld waits for on Base
| Fact | Base |
|---|---|
| Confirmation depth Unheld waits for | 12 |
| Block interval | about 2 seconds |
| Network time to that depth | about 24 seconds after inclusion |
| Assets Unheld lists here | ETH and USDC |
How the time is worked out
- A confirmation depth of 12, with one block about every 2 seconds, comes to about 24 seconds.
- The block time is Base Documentation’s own figure, read on Oct 3, 2026.
- Unheld’s own detection and checks come on top of that: usually a few seconds.
- The clock starts when the payment is first included in a block. Waiting to be included is not counted: a busy network or a low fee can add to it, and the payer’s wallet usually sets that fee.
- A block time is an average or a target set by the network; any single block can arrive sooner or later.
Why Unheld waits for confirmations
Until enough blocks are built on top of it, a payment can still be reversed. Unheld marks an invoice paid only at the depth set for each network, so goods are not released against a payment that can still disappear.
Base confirmation questions
How many confirmations does Unheld wait for on Base?
A confirmation depth of 12. Until then the payment shows on the invoice but is not yet credited.
How long does a payment on Base take to be credited?
About 24 seconds after the payment is first included in a block — the time the network takes to reach the depth — plus a few seconds for Unheld’s detection and checks. The time spent waiting to be included is not counted.
How long does USDC on Base take?
About 24 seconds after the payment is first included in a block, at a confirmation depth of 12, plus a few seconds for Unheld’s detection and checks.
Can a payment be credited sooner?
No. Crediting earlier would treat a payment that can still be reversed as final. The depth is a security setting, not a speed setting.
Sources
Every figure on this page comes from one of these documents. Each was read on the date shown rather than recalled.