Custom software vs SaaS: whendo SaaS economics break?
Published
Our take
SaaS economics break when the per-seat model costs more than owning software would. That tipping point usually arrives past 50 users, when you're forced into expensive tiers for a few features, or when your process is so specific that you pay for workarounds and add-ons. Below that, SaaS is efficient. Above it, you're renting at a premium what you could own.
This answer covers
- Production readiness
- Software architecture
How SaaS pricing works against you at scale
SaaS is priced to be cheap to start and to grow with you, which means it grows with your headcount whether or not your needs grow. Every new hire adds a seat fee. Every capability you outgrow pushes you to a higher tier. The model that made adoption easy is the same model that becomes expensive once you’re established.
The three points where it breaks
- Per-seat fees at scale. At 20 users, seat pricing is trivial. At 200, it’s a significant line item that keeps climbing with every hire, for software whose value to you hasn’t changed proportionally.
- Forced tier upgrades. You need one feature and it’s only in the enterprise plan, so you pay for a whole tier of things you don’t use. This “feature gating” quietly inflates cost.
- Workaround and add-on tax. When your process doesn’t fit, you buy add-ons, integrations, and connectors, or pay people to bridge gaps manually. Each is a cost the SaaS sticker price hides.
What “breaking” actually means
It doesn’t mean SaaS stops working; it means it stops being the economical choice. The break-even is where cumulative subscription cost over a few years exceeds the cost of building and owning software that fits. For a mid-sized team, that crossover commonly lands within about three years, after which ownership pulls ahead and keeps widening.
When to stay on SaaS
If you’re small, your process is standard, and you value speed of setup over fit and ownership, SaaS remains the right economic choice. Breaking economics is about scale and specificity, not a rule that everyone should build.
Key takeaways
- SaaS economics break when per-seat fees, forced tiers, and workarounds exceed the cost of ownership.
- The tipping point is usually past 50 users or when your process is highly specific.
- "Breaking" means SaaS stops being economical, not that it stops working.
- Small teams with standard processes should usually stay on SaaS.
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