Zoom Phone & UCaaS Leadership (by GIS): Zoom Phone Migration by GIS (Immediate Cost Savings)

Finance leaders now require line-level proof of savings from voice migrations, not just rate cards and vendor decks. For Zoom Phone cutovers, this means IT and GIS partners must show per-site, per-user cost data before and after migration. The shift is moving from one-time TCO slides to an ongoing, automated view of cost and usage that finance can audit. If you cannot tie your Zoom Phone rollout to forecast accuracy and cost visibility, your next budget request will stall.

• You cannot secure or defend budget without reconciled carrier, Zoom, and network costs tied to specific user groups.
• You risk shadow telephony spend if legacy trunks, DIDs, and support contracts are not tracked and shut off on schedule.
• You lose credibility with finance if forecasted savings do not match actual bills by site and department.
• You slow future UCaaS improvements when there is no trusted baseline for cost per user and cost per meeting room.

IT, finance, and the GIS team agree on a single cost model before the first Zoom Phone site migrates. IT exports current carrier bills by trunk, DID range, and site, then maps them to Zoom Phone users, call queues, and rooms in a shared sheet or dashboard. Finance defines the cost buckets that matter for forecasting, such as licenses, carrier, hardware, and support. GIS tags each migration wave with these cost buckets and updates them as legacy services are decommissioned. The result is a living view where finance can see savings by location and month without asking IT to rebuild numbers from scratch.

This week, create a simple, finance-approved template that maps each site’s current telephony costs to planned Zoom Phone licenses and SIP services, and make completion of this template a hard gate before any new migration wave is scheduled.

• Align with finance on the exact cost fields they need to see per site and per user for the Zoom Phone rollout.
• Inventory all active telephony contracts and map each line item to a site, trunk, and retirement date.
• Build a basic dashboard or report that compares pre- and post-migration costs by site using Zoom and carrier exports.