The math question in r/AiForSmallBusiness is practical: "We have eleven people. Do I buy eleven ChatGPT Plus seats?" For teams under 20, the answer is rarely yes or no. It is a ledger of who drafts, who approves, and how much duplicate work you can afford. Shared logins save cash until they cost you in mixed prompts, lost history, and customer mistakes.
When does a shared ChatGPT or Claude seat make sense?
A shared seat works when only one or two people draft on a fixed schedule, outputs always pass through one approver, and nobody needs private chat history for HR or client work. A six-person café that drafts weekly social posts in ChatGPT on Tuesday morning fits a shared model. An eighteen-person agency with parallel client threads does not.
Shared seats also fit when you are still proving one task. Pay $20/month while three people trial review replies beats $140/month while nobody tracks edit time.
TLDR: Share when one lane, one approver, and low volume. Split when parallel drafts or privacy rules appear.
When should each employee get their own seat?
Buy individual seats when more than two people draft daily, when chat history must stay private, or when simultaneous sessions block work. Claude, Gemini, and Perplexity business tiers exist because shared consumer logins break at scale: someone deletes a thread, someone pastes client data into the wrong project, someone upgrades prompts without telling the team.
Individual seats also help training. Each person keeps their own failed drafts without polluting a shared thread the whole shop relies on.
| Scenario | Shared seat ($20/month) | Per-user seats ($20 x N) | Operator read |
|---|---|---|---|
| 5 staff, 1 social drafter | $20 | $100 if all five | Shared wins until a second drafter appears |
| 10 staff, 3 daily drafters | Bottleneck risk | $60 for three seats | Three named seats, not ten |
| 15 staff, client-specific prompts | High error risk | $100 to $300 for 5 to 15 seats | Seat only roles that draft weekly+ |
| 18 staff, Google Workspace daily | Gemini bundled in some plans | Check Workspace tier first | Bundle beats duplicate ChatGPT |
TLDR: Seat count follows drafter count, not headcount. Count people who touch AI three or more days per week.
How do you calculate the real cost per seat?
Multiply subscription price by active drafters, then add review hours. Example: four Claude seats at $20 equals $80/month. If a lead spends two hours weekly editing those drafts, add roughly $200 to $400/month in labor at typical small-shop wages. A shared $20 seat with 90 minutes of review can beat four idle seats with no approve step.
Track for 30 days:
- Logins per week per person (honest count, not guilt count).
- Tasks completed without owner rewrite.
- Customer-facing mistakes traced to AI drafts.
Downgrade seats that logged zero tasks. That quarterly audit is how growing teams avoid the "paying for nine tools, using three" trap.
TLDR: Subscription plus review time is the real line item. Zero-use seats get cut.
How do Gemini, Perplexity, and team plans change the ledger?
Google Workspace shops should price Gemini inside the suite before adding parallel ChatGPT seats. Microsoft-heavy shops check Copilot licensing the same way. Perplexity Pro at $20/month rarely needs a seat for every employee; one research seat shared by purchasing or the owner is common in threads under 20 staff.
ChatGPT Team and Claude team offerings change the math when you need admin controls and separate workspaces. They cost more than consumer Plus but remove shared-password risk. Compare team tier only when shared seats already failed a 30-day trial.
TLDR: Check bundled AI in email and docs before stacking another $20 seat.
What is a sane rollout for a team adding its first five seats?
Week one: one shared seat, one task, one approver. Week three: add a seat for the second drafter if they block the shared login twice. Week six: add seats up to the number of weekly drafters, not total employees. Document each seat holder in the runbook from who owns AI on a small team.
Skip buying seats for the floor team until they have a defined draft task. Many shops find two seats plus owner approve covers twelve people until marketing or estimating grows.
TLDR: Roll out seats with drafters, not with org chart titles.
Related: AI tool graveyard in 30 days · Who owns AI tools under 20 staff · Get help wiring one task