Bank Administration Institute format
File type: Accounting, financial and tax file
A .bai file is a structured bank file used for electronic cash management and balance reporting.
It contains financial account and transaction data exchanged between banks and accounting, treasury, or cash-management systems.
Found 2 different file type records with the same bai filename suffix.
File type category:
Accounting, financial and tax file
Date updated: October 9, 2026
The Bank Administration Institute (BAI) format was developed and previously maintained by BAI for electronic cash management balance reporting. It is commonly known as the BAI format, while its most recent release is known as BAI2.
BAI2 is based on the Cash Management Balance Reporting Specifications Version 2. A BAI or BAI2 file typically contains account balances, transaction details, dates, amounts, and related bank reporting information in a structured text format.
Financial institutions provide these files to customers for import into accounting, treasury-management, cash-management, and bank-reconciliation systems. The format remains used for bank reporting, although individual software products may support only particular BAI or BAI2 features.
To process a .bai file, import it into the accounting, treasury-management, or bank-reconciliation software that received it. The exact import option depends on the software and the bank's BAI or BAI2 configuration.
Because BAI files are structured text files, they can also be opened in a plain-text editor on Windows, macOS, or Linux to inspect their contents. A text editor will not interpret the records or provide useful financial reporting.
There is no generally applicable standalone conversion for the BAI format. If the file must be converted to CSV, spreadsheet, or another banking format, the receiving accounting or treasury-management system may provide an import or export function.
Conversion should be performed with software that understands the file's BAI or BAI2 record structure, because a generic text conversion can lose transaction meanings, account relationships, or balance information.
File type category:
Plugin, addon file
Date updated: October 9, 2026
The BUILD2WIN add-in format is associated with B2W Software applications. A .bai file provides an add-in for BUILD2WIN.
It is a plugin component used by BUILD2WIN rather than a general-purpose document format.
The file is intended for use with BUILD2WIN on Microsoft Windows.
Use the .bai file with BUILD2WIN if the software provides an add-in management option. It is not intended to be opened as an independent document.
This type of .bai file is intended for B2W Software apps on Microsoft Windows. Do not rename the file or open it with an unrelated application.
A BUILD2WIN .bai file is an add-in component, so it normally cannot be meaningfully converted to another file format.
If the add-in is needed in another installation, use the original compatible file or obtain a version supplied for that installation rather than converting it.
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