# Bank accounts

URL: /systems/finance/bank-accounts · Id: `capability:bank-accounts`

> Bank accounts open the Company’s operating and reserve accounts, verify its owners, and feed every Transaction to the ledger.

Bank accounts open the [Company](/business/nouns/company)’s operating and reserve accounts, verify its owners and control person, and feed every [Transaction](/business/nouns/transaction) to the books.

## Contract
| Clause | Terms |
| --- | --- |
| Starts | `Company.incorporated`. |
| Signs | Each beneficial owner and a control person verify their identity ([Identity checks](/systems/legal-and-corporate/floor/identity)). An officer signs the account resolution ([Governance](/systems/legal-and-corporate/floor/governance)). |
| Feeds | Each Transaction arrives within one day and reconciles to an [Entry](/business/nouns/entry) in the [Ledger](/systems/ledger). |
| Cash | [Treasury](/systems/treasury) keeps a floor in operating and sweeps the rest to reserve, within [Limits](/business/nouns/limit) the [Treasurer](/agents/finance/treasurer) sets. |
| While held | Inherited. The [Startup](/business/nouns/startup) is a sub-ledger of the Studio-held entity’s accounts. |
| Owner of record | A self-serve Startup connects its own Company’s accounts. Each Transaction still reconciles through [`Transaction.reconcile`](/business/nouns/transaction/reconcile). |
| Bank changes | A change to a payout or payee bank is a one-way money decision under [Bank detail changes](/systems/trust-and-governance/controls/bank-detail-changes). It is confirmed through a second channel and waits one business day. |
| Notice | Every owner, and the payee at the old address, hears of each bank change and can stop it. [Bank detail changes](/systems/trust-and-governance/controls/bank-detail-changes) keeps payments flowing to the old bank during the window. |
| Payee bills | [`Bill.pay`](/business/nouns/bill/pay) holds a [Bill](/business/nouns/bill) whose bank differs from the payee’s record, whatever its amount. |

## Verbs
| Verb | Object | Event |
| --- | --- | --- |
| [Transaction.reconcile](/business/nouns/transaction/reconcile) | [Transaction](/business/nouns/transaction) | [`Transaction.reconciled`](/business/events/Transaction.reconciled) |

## Interfaces
- [API](/code/api/reference)
- [SDK](/code/sdk/reference)
- [CLI](/code/cli/reference)
- [MCP](/code/mcp/reference)

## Example
A contract-review tool graduates with $310,000 from its seed round. Both accounts open in four days, and Treasury keeps three months of spend in operating with the rest in reserve. A month later, an emailed Bill names a new bank for a payee, and it waits for a second-channel check.