Replatforming costs: modernize without guesswork

Parallel runs, strangler patterns and contract tests add engineering overhead beyond visual refresh work.

Cheaper maintenance windows trade revenue risk for simpler engineering.

Contracts catch breaking changes before customers do, saving emergency fixes.

Skipping it shows up as traffic loss with hard-to-reverse recovery cost.

The cleaner the target architecture is defined upfront, the more predictable the effort becomes. In this cost calculator you estimate the range based on scope and data volume.

A more modern target architecture costs more to build but lowers operating and maintenance costs in the long run. We recommend deciding the architectural cut early, because it influences almost every downstream item.

On top comes the migration and cleanup of existing data into the new schema. This work is easy to underestimate but it protects the value of the project.

This lets you test critical functions and data paths one by one and roll back if needed. A contingency and rollback plan belongs firmly in the calculation, even if it is rarely used.

The actual figure depends on data volume, interfaces and architectural depth. The calculator gives a first orientation; the binding quote follows after a short analysis.

The decisive factor is comparing total cost of ownership over the planned usage period. In this cost calculator you can roughly weigh both scenarios against each other.