SaaS Subscriptions vs Custom Software: The Five-Year Math

SaaS subscriptions feel affordable because the cost is spread monthly. But five years of subscriptions — across multiple tools, growing user counts, and escalating tier prices — often exceeds the cost of custom software that does exactly what you need.

The five-year SaaS calculation

Consider a typical mid-sized business using six SaaS tools:

These numbers don't include annual price increases (typically 5-10% per year), additional users as the team grows, or premium features that become necessary as the business scales. The realistic five-year total is often €70,000-€90,000.

What SaaS can't solve

Integration friction

Six separate tools means six separate data silos. Getting a unified view of your business requires manual exports, third-party integration tools (another subscription), or accepting that your data is fragmented.

Workflow compromises

Each SaaS tool was designed for a generic workflow. Your workflow is specific. The gap between generic and specific means workarounds, manual steps, and compromises that slow your team down every day.

Vendor lock-in

Your data lives in someone else's system. If they raise prices, change features, or shut down, your options are limited. Migration is painful and data portability is never as clean as vendors promise.

Feature bloat

You're paying for thousands of features you don't use. SaaS tools are designed to serve every possible customer, which means complexity you don't need subsidized by your subscription.

When custom makes sense

Custom software makes financial sense when:

• You're spending over €8,000 annually on SaaS tools that don't fully fit your needs
• You're wasting significant team time on workarounds and manual data transfer
• Your competitive advantage depends on processes that generic tools can't support
• You're growing and your per-user SaaS costs will scale significantly

The custom alternative

A custom platform that replaces three or four SaaS tools costs €30,000-€80,000 to build. Annual maintenance runs €5,000-€10,000. Over five years, the total is typically comparable to — or less than — the SaaS alternative. But you get software that fits your exact workflow, with all data in one place, and no dependency on external vendors' product decisions.

The real question

Don't ask "is custom software expensive?" Ask "what is the total cost — in subscriptions, workarounds, inefficiency, and missed opportunities — of not building custom?"