Does Tailored Fit Pricing replace traditional sub capacity pricing?

Not entirely. Sub capacity pricing under SCRT remains for customers that have not moved to TFP. TFP sits as an alternative for new contracts and for renewals. The most common pattern in 2026 is a phased move to TFP at the next mainframe renewal, with one or two LPAR groups landing on a TFP option each cycle.

Why does MIPS keep showing up if MSU is the billing unit?

MIPS is a hardware metric that procurement teams use to compare hardware platforms. MSU is the IBM software billing currency. The two relate at a defined ratio per processor model. The buyer side discipline is to translate every MIPS conversation into MSU before talking price with IBM, since MSU is what actually bills.

Can we run TFP on some LPARs and traditional sub capacity on others?

Yes. The TFP enrollment runs by LPAR group, not by entire CPC. The buyer side pattern is to enroll the LPAR groups with the most predictable workload first, then to assess the bursty groups separately. Mixed enrollments are common and supported in the contract.

What happens if ILMT scans lapse on an IPLA product?

The audit position moves from sub capacity to full capacity, which charges every PVU on the physical processor. The financial swing is large and the contract gives IBM the right to enforce. The buyer side discipline is to monitor scan completion monthly, fix gaps inside the contracted ten day window, and document remediation in writing.

How early should we open the mainframe renewal conversation?

Nine to twelve months ahead of expiry. Mainframe sellers manage their book on a multi year cadence and respond materially better to early engagement. The buyer side discipline is to open the renewal conversation with a SCRT and ILMT data pack in hand, not to wait for the IBM seller to drive the timing.

How does Redress engage on mainframe MLC and IPLA?

Redress runs mainframe engagements inside Vendor Shield and the Renewal Program. The work covers the TFP fit assessment, the SCRT and ILMT review, the peak smoothing program design, the renewal sequence, and the audit defense readiness. Always buyer side, never IBM paid.

White Paper · IBM

Cut IBM mainframe cost with MLC and IPLA levers

IBM mainframe pricing splits into Monthly License Charges and One Time Charges. Inside MLC the Tailored Fit Pricing options change the cost shape entirely. The buyer side reference for negotiating mainframe renewal in 2026.

Format PDF + HTML

Read Time 20 Minutes

Last Updated July 29, 2025

What you will take away

MLC covers z OS and the strategic middleware. Billed monthly on a usage curve.
IPLA covers Db2, IMS analytics, and most modern z products. Billed as one time charges plus subscription and support.
Tailored Fit Pricing is the MLC lever. Three options: Enterprise Capacity, Enterprise Consumption, Software Consumption.
MSU is the MLC currency. Million Service Units, billed on the rolling four hour average.
MIPS is a hardware metric. Often quoted to procurement teams; not the actual MLC currency.

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Cut IBM mainframe cost with MLC and IPLA levers

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