On-Prem to Cloud Migration Checklist: 12 Must-Check Points [2026]

Nowadays, organisations move workloads from on-premises infrastructure to various cloud platforms. In the process, they often face data loss, security gaps, compliance failures, or unexpected costs. All these risks take place due to a lack of checklist structured planning. The pre and post-planning of the migration determines its success rate. Thus, this article will walk you through 12 must-check points of an on-prem to cloud migration checklist for a secure and effective transition.

Signs That Your On-Prem Infrastructure Needs Cloud Migration

But the question is, why would an IT professional even need to migrate from on-prem to cloud? The answer to this is listed below. 

• They frequently require costly hardware upgrades or maintenance cycles.
• The team struggles to scale the resources when the traffic spikes.
• Moreover, on the on-premise systems, disaster recovery remains slow & unreliable. 
• Additionally, the remote access to internal applications is limited or overly complex.
• Also, the compliance audits reveal security gaps that legacy infrastructure cannot address.

What Causes On-Prem to Cloud Migration to Fail?

Given below are the reasons you might be facing these issues. Read through them carefully and identify the actual root cause in your situation.

• The comprehensive inventory of hardware, software, applications, & data got skipped.
• Ignoring dependency mapping eventually leads to broken application behaviour.
• Users treat security & compliance as a final step rather than integrating them from the start.
• Less team training leads to low adoption of cloud tools & workflows.
• The poor data validation practices result in corruption or incomplete data transfers.
• Lack of a tested rollback plan leaves the teams stranded.

On-Prem to Cloud Migration Checklist: 12 Must-Check Points

In this section, we will focus on the most effective steps to plan and execute a successful on-prem to cloud migration. The checklist is divided into three stages.

• Pre-Migration: Planning and Assessment
• During Migration: Execution and Security
• Post-Migration: Testing and Optimisation

Read through each of these On-premises to cloud migration steps carefully & apply them based on your environment and migration goals.

Pre-Migration: Planning and Assessment

Before you proceed to the actual migration, make sure to perform the pre-migration steps. Follow all the points below one by one to avoid any kind of data loss. 

Point 1: Define Clear Migration Goals

Firstly, an organisation must establish well-defined objectives that allow it to make informed and guided decisions throughout the migration process. 

Steps to Define Migration Goals are as follows. 

1. Note the primary business drivers, such as cost reduction, scalability, or disaster recovery.
2. After that, set a measurable success criterion & define what a successful migration looks like.
3. Next, align migration goals with your overall IT strategy & stakeholder expectations.
4. Establish a realistic timeline & budget with executive sign-off before proceeding.

Point 2: Audit Your Existing Infrastructure

Now, to determine what you need to migrate, replace, or retire before migration, you must audit the infrastructure of the on-prem platform. 

Cloud migration planning guide for auditing the infrastructure is as follows. 

1. First, run the discovery tools to catalogue all hardware, software, applications, & data assets.
2. Then, note down the dependencies b/w applications, databases, & network components.
3. Identify the cloud-ready workloads v/s the ones that require refactoring. 
4. Mark any expiring system or license that needs to be addressed before migration.

Point 3: Identify the Workloads & Pick a Migration Strategy

You can not migrate every workload the same way. Therefore, you must first classify each application and then apply the right strategy accordingly. 

Steps to follow for identifying workload are as follows. 

1. Group workloads by type, such as databases, web apps, storage, or legacy systems.
2. Assign a migration strategy to each group: Rehost, Replatform, Refactor, Repurchase, Retain, or Retire.
3. Prioritise low-risk, high-value workloads to migrate first as pilot candidates.
4. Validate each classification with your application owners and architecture team.

Point 4: Perform a Cloud Readiness Assessment

This assessment basically helps organisations to evaluate the capabilities of their team, existing integrations & infrastructure compatibility with your chosen cloud platform.

Steps to Perform a Cloud Readiness Assessment:

1. Evaluate your team’s skills and identify gaps in cloud knowledge that require training.
2. Map application dependencies and assess third-party integration compatibility.
3. Cross-verify the utilisation of the available resources. 
4. Choose the destination cloud platform & make sure it meets your compliance requirements.

During Migration: Execution and Security

During the execution, it is important to design a secure architecture & implement a secure and error-free migration. Follow the checklist below, the on-prem to cloud migration checklist, during the migration phase. 

Point 5: Create a Robust Network Architecture

It is essential to design the right network architecture before you migrate data, as it makes sure to result in a secure, reliable, and high-performance communication.

Steps to Design Network Architecture:

1. Plan your virtual private cloud (VPC) layout, subnets, and routing configurations.
2. Set up VPN tunnels or dedicated direct connect links between on-prem and cloud.
3. Configure firewalls, security groups, and network access control lists appropriately.
4. Test network throughput and latency to confirm performance meets application requirements.

Point 6: Implement Identity and Access Management (IAM)

IAM must be fully configured before any workload or data moves to the cloud to prevent unauthorised access during and after the migration.

1. Define roles, permissions, and access policies aligned with the principle of least privilege.
2. Turn on the multi-factor authentication (MFA) for all admin accounts.
3. Make sure to set up the single sign-on (SSO) & determine the federation for effortless user access.
4. Set up centralised logging for all authentication & authorisation events in the cloud.

Point 7: Migrate Data Securely & Validate Integrity

Data migration is the most critical and risk-prone step of the entire process. Secure transfer and thorough validation prevent data loss or corruption in the new environment.

Steps to Migrate Data Securely are as follows. 

1. First, categorise all data by type, sensitivity, & business criticality before any transfer begins.
2. Use encrypted transfer protocols & cloud-native migration services for all data movement.
3. Run checksum & row-count validations immediately after each batch transfer completes.
4. Test application behaviour against the migrated data to confirm it functions as expected.

Point 8: Address Security and Compliance in Parallel

1. Enable role-based access control (RBAC), encryption at rest, and encryption in transit.
2. Map each workload to its applicable regulatory framework, such as GDPR, HIPAA, or ISO 27001.
3. Deploy cloud-native security monitoring and threat detection tools from day one.
4. Schedule a compliance review before go-live to confirm all controls are in place and verified.

Post-Migration: Testing and Optimisation

Even after the migration completes, you must perform some of the crucial steps to make sure that the migration is performed securely. Now, follow the below given On-prem to cloud migration checklist after migration. 

Point 9: Run Pre- & Post-Migration Testing

1. To get ready for the migration, we need to set up a staging environment that is very similar to the production setup we have now. This will let us try things out before we actually make the switch.
2. We should run tests on all the applications, APIs, and third-party integrations that we are moving.
3. We have to make sure that we can get to all the data we need and that it is correct and consistent in the cloud environment.
4. We need to write down what happens when we test everything and fix any problems before we go live with the new system.

Point 10: Conduct Load, Stress, and Rollback Testing

1. Simulate peak traffic scenarios to stress-test compute, storage, and network resources.
2. Identify and resolve any performance bottlenecks discovered during load testing cycles.
3. Execute a full rollback drill to confirm you can revert to on-premises systems cleanly.
4. Set clear thresholds that trigger an automatic rollback decision during live cutover.

Point 11: Monitor Performance and Optimise Costs

1. Deploy cloud monitoring tools to track CPU, memory, storage, and application performance.
2. Set up automated alerts for performance anomalies or cost spikes above defined thresholds.
3. Enable autoscaling for dynamic workloads to match resource allocation with actual demand.
4. Review your cloud spend monthly and switch to reserved or spot instances where applicable.

Point 12: Train Teams and Establish Governance

1. Conduct role-specific cloud training for developers, administrators, and security personnel.
2. Define governance policies covering resource access, cost controls, and compliance obligations.
3. Maintain up-to-date documentation of all cloud infrastructure, configurations, and procedures.
4. Schedule regular governance reviews to ensure policies evolve with your cloud environment.

Conclusion

In the above article, we discussed the key symptoms that signal the need for cloud migration and the common causes of migration failure. Along with that, we explored all 12 must-check points of a comprehensive on-prem to cloud migration checklist across planning, execution, and post-migration phases.

FAQs

About The Author:

Rohan Wiese

Rohan Wiese is a Technical Writer at Aryson Technologies. He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech.

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