TTOs:
To Build or Buy?
The True Cost of Building Your Own TTO System
The Number That Drives the Decision Doesn't Matter
Most build decisions hinge on a first-year cost estimate. But decades of enterprise software research show that the initial build accounts for just 22% of a system's total lifetime cost.
This guide quantifies the hidden costs of the other 78%, from maintenance and compliance gaps to the organizational knowledge that walks out the door when a key developer leaves. The final figure is 3x–5x higher than the number that started the conversation.
What Institutions That Built and Then Bought Actually Learned
Some of the largest TTO operations in the country have completed the full arc: built a custom system, absorbed the mounting costs, and migrated to a commercial platform.
They consistently assume internal developer time is "free," which is the single biggest driver of cost underestimation, and every reversal represents a double investment.
AI Isn't Raising the Ceiling; It's Moving the Floor
Capabilities that were differentiators two years ago are now table stakes. For institutions carrying a custom system, closing that gap means owning a separate architectural undertaking: one that demands scarce, expensive talent and continuous rework as the underlying models shift.
This guide lays out what that actually costs, and why a purpose-built platform is the only realistic way to absorb it.
