Separating IT for a corporate carve-out is a business-continuity and dependency problem, not just a systems-migration project. The practical route is to define what is being sold, retained and shared; map dependencies across both businesses; decide what each side needs at closing; and then assign every system a separation or transition path with a clear owner and exit milestone. The fastest and least costly plan depends on the transaction perimeter, contract rights, data and regulatory constraints, shared assets, and the buyer’s intended operating model.
What should the separation plan achieve?
Plan for two operating businesses: the carved-out company and the seller’s retained business. A system associated with the business being sold may also support the seller, and a shared service may be needed by both sides after closing. The plan must preserve each party’s required operations while specifying who can access which systems, data and support.
Deloitte’s 2024 report, Is your IT M&A-ready?, puts the continuity test this way: “To ensure business continuity for both the seller and the carve-out after Day 1, access to such functions needs to be maintained and deals can close only when the operational needs of both parties are met, either through a separation of systems or via transitional arrangements.” That makes Day 1 readiness a distinct milestone from the longer-term standalone end state. A transitional service agreement (TSA) can bridge the gap, but it does not itself define how or when the service will end.
How to organize the separation work
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Define the transaction perimeter and initial strategy
Confirm which business units, legal entities, locations, people, processes, data, contracts, applications, infrastructure and services are in scope, retained or shared. Record assumptions and unresolved ownership or access questions. Select an initial path for each major capability—separate, transition temporarily, replace or rebuild—before committing to implementation. Deloitte recommends preparing early, ahead of the initiatives needed to make the carved-out business operational on Day 1.
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Map operational and technical dependencies
Build an inventory that connects systems to the processes, users, data, interfaces, contracts and support teams they rely on. Include dependencies in both directions: a shared ERP or manufacturing system might serve the carved-out operation while also supporting the seller. Trace interfaces and downstream processes, not just application ownership. The M&A Research Centre at Bayes Business School notes that ERP separation can be complicated by connected systems and interfaces, and that shared data requires inventory, mapping, migration and access controls.
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Set Day 1 requirements for each party
For each dependency, state what the buyer and seller each need to keep operating at close: access, capacity, data, support, decision rights and any control or compliance function. Identify gaps that could affect continuity, deal value, closing mechanics or compliance. Decide whether a system split, temporary service or another arrangement covers each gap.
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Choose a disposition system by system
Compare the available paths against the same criteria rather than assuming one approach works for the whole estate. The options below are a practitioner framework, not an independently validated ranking. Estimate implementation effort and cost for this deal from its documented dependencies; there is no general schedule or cost figure that can safely predict a particular carve-out.
Rank #2
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Run data, security and legal work in parallel
Inventory sensitive information and applications, determine permitted access and disposition, assess changed network boundaries, review compliance scope, prioritize vulnerabilities in shared or conveyed assets, and establish the security capabilities the new entity will need. Coordinate security, privacy and legal teams when addressing data shared before closing.
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Specify transitions and prove the exit path
For every service that continues temporarily, document what the seller provides, operating expectations, responsibilities, access, issue handling and the milestone and destination for exit. Track the handover of responsibility and test that the buyer can operate the replacement or standalone service before relying on it.
How to choose a path for each system
| Approach | What it means | Questions to resolve |
|---|---|---|
| Lift and shift | Move the existing system or environment into the carved-out company’s control or infrastructure. | Can it run at the new entity’s scale and operating model? What seller infrastructure, data, support, interfaces, licenses or contracts would remain dependencies? How will historical data and access be separated? |
| Replace | Adopt a different application or service for the carved-out business. | Can the replacement support required processes and integrations by the needed milestone? What migration, user change, data access and parallel-running needs arise? |
| Rebuild | Build a new capability for the carved-out entity rather than transferring the existing system or adopting a replacement as-is. | What must be recreated, validated and secured? Can the new capability be ready without disrupting either party’s operations, and what temporary support is needed meanwhile? |
For each option, record the expected continuity and cutover risk; continuing reliance on seller infrastructure, data or support; historical-data and access requirements; interface and downstream-process effects; license and contract transferability; deal-specific time and cost estimates; fit with the new entity’s scale and operating model; and cyber, privacy and compliance controls. Resolve license and contract rights before treating a system or service as transferable.
Rank #3
- Author: Bungay Stanier, Michael.
- Publisher: Page Two
- Pages: 244
- Publication Date: 2016-02-29
- Edition: 1
How to separate data and cybersecurity safely
Separation changes who can reach data, systems and networks, and which organization is responsible for protecting them. PwC’s cybersecurity guidance for spin-offs calls for a high-level security separation plan, application-access risk assessment, inventory of sensitive information and processes, review of network changes, compliance analysis, and prioritization of vulnerabilities in conveyed and shared assets.
Define security during any transition
If security capabilities remain with the seller under a TSA, specify how access requests, activity monitoring and incident response will work, including who can authorize actions and who owns escalation. Define the transfer path for identity and access management, security information and event management (SIEM) or security operations center (SOC) functions, segregation of duties, threat and vulnerability management, patching, firewall management and compliance management.
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Control information sharing around closing
Coordinate security, data privacy and legal review of information that may be shared between buyer and seller. Deloitte highlights employee details, customer lists and vendor contracts as examples where inappropriate sharing must be avoided. What may be shared depends on the deal terms, applicable law and regulator requirements; a general separation plan is not a blanket authorization to disclose data.
Rank #4
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Apply regulatory guidance to the right entities
The FTC’s Safeguards Rule guidance is for covered financial institutions, not a universal carve-out checklist. For those covered entities, it calls for knowing where data is collected, stored or transmitted; maintaining a list of systems and personnel; anticipating system and network changes; monitoring authorized-user activity; testing safeguards; and maintaining a written incident-response plan. Other privacy, sector-specific and competition requirements depend on the businesses, jurisdictions and transaction.
Federal Reserve separability guidance is directed to covered domestic companies’ resolution planning, not to every corporate carve-out. In that specific context, its governance model calls for executable options, identified impediments and mitigations, accountable management, estimated execution time, communications planning, and assessment of financial, business, critical-operation and operational-continuity effects, including IT.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What belongs in a TSA and its exit plan?
A TSA describes services the seller will continue providing after closing and the conditions for the buyer to take them over or replace them. Deloitte describes TSA exit as a handover of responsibility for IT services. Treat each service as a defined transition with a destination, not as an open-ended extension of shared operations.
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- Service scope: Identify the specific IT service, covered users or entities, dependencies and any exclusions.
- Operating model: Set responsibilities, service expectations, access and approval rules, issue handling, monitoring and escalation.
- Security and data: Specify permitted access, safeguards, incident handling and records needed during the transition.
- Exit destination: State whether the service will be transferred, replaced, rebuilt or otherwise ended, and what capability must be ready to assume responsibility.
- Milestones and ownership: Name accountable leads, dependencies, target exit milestones and evidence that the receiving operation is ready.
The 2024 Bayes Business School report cautions that prolonged IT TSAs can impede autonomy and sustain cybersecurity and data-control exposure. This is a qualitative risk, not a universal quantified outcome; the appropriate duration and scope depend on continuity needs and the executable exit plan.
What a practical separation control plan should contain
Use one integrated plan to connect business continuity, technology decisions, data controls and TSA exit. Assign accountable owners from the deal team, business operations, IT, cybersecurity, privacy and legal functions. Maintain a decision and dependency log so that a change in transaction perimeter or operating model triggers review of the affected systems, access and milestones.
- Perimeter and assumptions for sold, retained and shared operations.
- System, process, user, data, interface, contract and support inventories, including dependencies used by the seller.
- Day 1 operational needs of each party and the arrangement covering each need.
- Chosen system disposition and the rationale against continuity, dependency, data, interface, rights, cost, scale and control criteria.
- Data access, migration, retention and security responsibilities, including changed network boundaries and incident response.
- TSA service definitions, accountable owners, exit destinations and readiness evidence.
- Open issues, risks, mitigations, decision owners and milestones tied to the actual transaction timetable.
KPMG International entities’ 2026 paper, Separation in practice, captures the practical executive questions: “What is the fastest, cheapest way to separate shared technology without breaching data or licenses?” and “How should you organize the separation project to ensure speed and quality?” The useful answer is to make those trade-offs explicit for each system and service, rather than optimize for speed or cost before dependencies, rights and continuity requirements are understood.
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