Don't just migrate. Confirm the savings.
Migrating to AWS only delivers value when the source infrastructure is confirmed decommissioned. CoreFinOps tracks stranded dual-run cost and records decommission milestones so nothing falls through the gap.
Decommission problems CoreFinOps solves
"We migrated but both environments are still running."
The dual-run tracker shows financial overlap per workload. CoreFinOps surfaces which workloads are incurring both source and AWS costs simultaneously.
"We don't know if the source has actually been shut down."
The Decommission milestone requires a customer-confirmed record. No decommission entry means the source cost is still flagged as potentially active stranded spend.
"Finance asked us to show the net saving from the migration."
The Value Realization Report compares source baseline cost to post-decommission AWS run cost per workload — with verified savings in the Value Ledger.
The decommission financial workflow
Import source costs
Load the legacy estate baseline for the workload via CSV or XLSX. This becomes the financial starting point for decommission ROI.
Track dual-run period
During migration, both environments incur cost. CoreFinOps makes this overlap period visible per workload and per wave.
Confirm decommission
Your team records when the source infrastructure is confirmed shut down. The decommission date closes the dual-run cost window.
Verify the outcome
Post-decommission, the Decommission Report and Value Ledger record the source baseline vs realized AWS cost with full lineage.
Stranded cost is the most common post-migration oversight
Workloads that moved to AWS but whose source infrastructure was never confirmed decommissioned continue to incur cost on both sides. CoreFinOps surfaces all workloads without a confirmed decommission date in the Decommission Report — so nothing stays hidden.
Decommission Report
Exported as CSV or XLSX. Contains:
- Workload name and migration wave
- Source cost baseline (from imported CSV/XLSX)
- Decommission confirmation date
- AWS run cost post-decommission
- Stranded cost exposure if decommission not confirmed
- Value Ledger reference for verified saving
Close the stranded cost window.
Book a demo and we'll show the dual-run tracker and decommission report against a real or sample migration dataset.