Custom Software vs SaaS: The Real 5-Year Cost Comparison

The average small and mid-size company spends $11,200 per employee per year on SaaS subscriptions . For a 50-person team, that's $560,000 a year, and it grows every year. SaaS vendors raise prices 7–12% annually as a rule, so the same bill crosses $800,000 within five years even if headcount stays flat. SaaS works beautifully at the start. A two-person startup should absolutely use Stripe, Notion, and HubSpot. But once a business has real operational complexity, 30, 80, or 200 people with established processes and interconnected workflows, the custom software vs SaaS question looks entirely different. This article covers the hidden costs SaaS vendors don't advertise, a 5-year total cost of ownership comparison, real ROI results from e-commerce and invoice automation, a framework for when custom wins (and when it doesn't), and a short audit you can run on your own stack today. The SaaS trap: why growing businesses hit a ceiling Subscription costs that scale faster than revenue Per-user