Every growing business reaches the day the spreadsheet breaks — not dramatically, but quietly: two versions disagree, a number can't be traced, and a decision waits while someone reconciles by hand.
The spreadsheet isn't the problem — the copies are
A spreadsheet is a fine tool. The trouble starts when there are five of them, each a little different, each someone's private truth. The question "what's our number?" then has several answers, and the meeting becomes a debate about whose file is right instead of what to do about it.
You've outgrown spreadsheets-as-system when:
- Two people quote different figures for the same thing, and both are "right."
- No one can explain where a number came from without opening three files.
- The monthly close depends on one person and their particular workbook.
The goal of a single source of truth isn't better dashboards. It's ending the argument about whose number is correct.
You don't need a data warehouse to start. You need one agreed place where each important number lives, owned by one person, that everyone draws from instead of copying. The technology matters far less than the discipline of stopping the copies.