Short answerA spreadsheet is enough until you cross any of three thresholds: more than about 50 active customer relationships, more than one person needing the same customer information, or any process that depends on timing — follow-ups, renewals, reminders. Past any of those lines, a CRM pays for itself, because spreadsheets store information but can't act on it: a spreadsheet will never tell you that a quote has sat unanswered for six days.
About the numbers: Unless a named source is linked, ranges and dollar examples are planning illustrations—not industry benchmarks, client results, or promises. Measure your own volume, time, pricing, and adoption before making a decision.

What to do next

Let's be fair to the spreadsheet, because the anti-spreadsheet sales pitch is usually overdone. For a young business, a well-kept spreadsheet is genuinely fine: it's free, you already know how to use it, and it holds names, numbers, and notes as well as anything. Owners who feel guilty about "still using spreadsheets" are often being marketed to, not advised. The spreadsheet doesn't fail because it's unsophisticated. It fails at specific, predictable moments — and until you've hit one, keep the spreadsheet.

The first failure is memory-dependence. A spreadsheet records what you type; it doesn't prompt what you should do. Every follow-up, every "check in with them in March," every renewal lives in your head or your calendar, and heads and calendars drop things at exactly the volume where the business starts depending on them. The second failure is multiplayer. The moment a second person needs customer history — an assistant answering the phone, a technician heading to a job — the spreadsheet becomes either a stale copy or a collision of edits. The third failure is history. A row holds the customer's current state; it doesn't hold the story — the three quotes, the complaint that was resolved, the email thread. When you find yourself searching your inbox to reconstruct what you know about a customer, the spreadsheet has already failed; your inbox is your real CRM, and it's a terrible one.

If you've crossed a threshold, the practical guidance is: buy boring. Small businesses don't fail at CRM by choosing the wrong product; they fail by choosing too much product — enterprise features, mandatory pipelines, fields nobody fills. The right CRM for a 5-person business is the one your least technical person will actually update, and it often comes bundled inside industry tools you already own (most field-service, salon, and clinic platforms include one). The decision of whether and which belongs downstream of a clearer question: where does customer information actually live in your business today, and what does retrieving it cost? Tracing that is part of every FrictionList audit — and a fair number of audits conclude the owner needs a settings change in a tool they already pay for, not a new subscription.

Quick answers

At what point does a business need a CRM?

Around 50+ active relationships, a second team member needing customer data, or any revenue that depends on timed follow-up — whichever comes first.

What does a small business CRM cost?

$0 to $30 per user per month for the tier most small businesses need; many industry platforms include one at no extra cost.

What's the biggest CRM mistake small businesses make?

Overbuying. An unused CRM is worse than a spreadsheet — pick the simplest tool your team will actually keep updated.