VPS Cost Calculator: A Practical Cost Model

A checklist-style model for estimating monthly VPS spend: compute + storage + egress + managed services.

Quick profile

This is a cost modeling template you can apply to any provider: AWS, Alibaba Cloud, Vultr, etc.

Step 1: Define the workload

  • Concurrent users / requests per second (RPS)
  • Storage (GB) and growth rate
  • Outbound traffic (GB/day)
  • Availability target (single zone vs multi-zone)

Step 2: Monthly cost buckets

  1. Compute: instances × hours
  2. Storage: volumes + snapshots
  3. Bandwidth / egress: outbound GB × unit price
  4. Managed services (DB/Redis/LB/CDN)
  5. Ops overhead (monitoring, backups, logging retention)

Run at least three scenarios:

  • Conservative (today)
  • Expected (3–6 months)
  • Aggressive (growth/peak)

Checklist

  • Egress is estimated from real traffic (not guesswork)
  • Cross-zone traffic is counted (if HA)
  • Backups and log retention are included
  • CDN strategy is defined (or egress will balloon)