Direct answer · reviewed July 23, 2026
What is a source of truth in a small-business app stack?
A source of truth is the declared place the team trusts for a specific current answer, such as a customer record, job status, approved file, appointment, or invoice status, when copies or systems disagree.
Key points
- Define one primary home for each important business question.
- Document which copy controls when information moves between systems.
- Give the team a clear correction path when records conflict.
- A spreadsheet can be a valid source of truth when its owner, access, and use remain controlled.
Limits and exceptions
- One source of truth does not mean one app must contain every type of business information.
- Synchronization can fail, so a connection still needs an owner and recovery rule.