The five hidden buckets nobody puts in their budget spreadsheet
Sticker price is the first line of the TCO model and the easiest one to find. The other five buckets are what separate the budget that survives Q1 from the one that gets re-baselined in March.
**Bucket 1: premium-credit overage.** Both products gate frontier-model use behind a monthly credit quota — $15/mo on Copilot Pro, $70 on Pro+, $200 on Max; a fast-pool/slow-pool quota on Cursor. Past the quota, Copilot charges overage to your card (typically $0.04-0.12 per premium request); Cursor drops you into slow-pool latency. A heavy user on Copilot Pro can easily spend $20-40/mo in overage on top of the $10 sticker. A 5-person team running mid-tier work can spill $100-150/mo of unbudgeted overage if they're on Pro instead of Pro+.
**Bucket 2: throttle-tax (the cost of waiting).** When Cursor's fast pool exhausts, premium requests route to the slow pool — 30-90 seconds of latency vs 2-5 seconds, and possibly a model downgrade. The dollar cost isn't on the invoice; it's in the engineer's hourly rate × the time they spend waiting. A senior engineer at $120k/year ($60/hr fully loaded) waiting an extra 60 seconds × 30 throttled requests/day × 5 days = ~$150/week of pure wait-time cost. This bucket bites Cursor disproportionately because of how the slow-pool works, but Copilot Max users avoid it entirely thanks to top-priority queue.
**Bucket 3: onboarding and training hours.** Cursor has a steeper initial learning curve than Copilot — the IDE is a fork of VS Code with substantial UX changes, the Agent mode requires prompt-discipline most developers don't have on day 1, and the keybinding muscle memory transfers but not perfectly. Most teams report 4-12 hours per engineer of productivity drag in week 1 of a Cursor rollout. At $60/hr fully loaded × 8 hours average × team size, that's a one-time cost most TCO models ignore. Copilot's onboarding drag is roughly half — 2-6 hours — because it lives inside the editor people already use.
**Bucket 4: tool-sprawl cost.** A non-trivial number of teams end up running both products in parallel (the famous $30/mo 'Cursor Pro + Copilot Pro' staff-engineer stack). Two sets of licenses, two billing surfaces, two admin panes, two policy regimes. For solo devs the operational cost is near zero; for orgs above 50 seats it adds 0.1-0.3 FTE of vendor management.
**Bucket 5: procurement and contract overhead.** Custom-priced Business and Enterprise tiers require sales conversations, security reviews, MSAs, and annual commitments. Procurement teams typically allocate $5k-15k of internal time per vendor onboarding for a 50-person org. Cursor Business at $40/seat is publicly posted with self-serve checkout — zero procurement cost. Copilot Business/Enterprise requires the full procurement loop, which can take 4-12 weeks and burns real org time.