When Should You Build Custom Software?
A practical decision framework for business leaders deciding between buying SaaS, building custom, or doing nothing.
Table of Contents
- 1. The three options
- 2. The uniqueness test
- 3. The cost test
The three options
When you identify an operational problem, you have three options: do nothing (absorb the inefficiency), buy a SaaS tool, or build custom software. The right choice depends on three factors: how unique your workflow is, how much the inefficiency costs you, and how strategic the function is to your business.
The uniqueness test
Ask yourself: does my business do this the same way as every other company in my industry? If yes, a standard SaaS tool probably works. If no — if your process is a competitive differentiator — forcing it into a generic tool creates friction.
Example: every company needs accounting. Most use QuickBooks or Xero because accounting is standard. But a consulting firm's engagement management process is unique — how they scope, staff, track, and bill engagements. That is worth building custom.
The cost test
How much is the inefficiency costing you? If a manual process consumes 10 hours per week across a team of 5 at $50/hour, that is $130,000 per year. A custom solution that solves 80% of that costs far less than the problem.
Calculate the annual cost of the problem, compare it to the one-time cost of a custom solution, and the decision becomes clear.
Frequently Asked Questions
What is the minimum size for custom software to make sense?
About 5-10 employees. Below that, the ROI is harder to justify. Above that, the time savings compound quickly.
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