Cloud Migration Checklist: What Growing Businesses Need to Know Before Moving

More than half of all cloud migrations fail to meet expectations. Not because the cloud doesn't work. Because most businesses skip the readiness work.

According to Redgate's 2026 State of the Database Landscape report, 91% of teams hit at least one significant challenge during a cloud migration. Organizations that conduct a formal readiness assessment before starting see 2.4x higher success rates than those who don't (Accenture). And partner-led migrations finish on time and on budget 71% of the time, compared to 49% for self-managed projects (Forrester).

The technology is not the hard part. The preparation is.

Here's what growing businesses need to check before they move anything to the cloud.

Why Most Cloud Migrations Go Sideways

The failure pattern is consistent. A business decides to move to the cloud, picks a vendor, and starts migrating the easiest applications first. Two months in, they hit an application that doesn't behave in the cloud the way it did on-premises. The timeline slips. Budget creeps. Leadership asks why this was supposed to be simple.

The answer is usually the same: no one did the inventory work up front.

The three most common failure drivers, according to cloud migration research:

• Data integration complexity. Cited by 53% of teams in Redgate's 2026 report.
• Skillset gaps. 48% of organizations hit this wall.
• System complexity. 39% underestimated what they had running.

None of these are surprises if you look for them before you start.

The Checklist: What to Audit Before You Migrate

1. Application Inventory

This is where most businesses underestimate the work. You need a complete list of every application running in your environment. Not just the big ones your IT team knows about. Everything.

For each application, you need to know: Who owns it? What does it connect to? Does it have a cloud-compatible version? What happens to the business if it's down for two hours?

Legacy and custom applications have a cloud migration success rate of only 61%, compared to 94% for email and collaboration tools (Accenture/Medha Cloud 2026 data). That gap exists because custom apps have undocumented dependencies that don't surface until you try to move them.

Start the inventory before you start anything else.

2. Network Readiness

Moving workloads to the cloud changes your network requirements in ways that aren't obvious from a vendor sales pitch.

If your 60-person team is doing everything through a thin internet connection, adding cloud-hosted applications will surface that bottleneck fast. You need to assess current bandwidth utilization, understand what applications are most sensitive to latency, and confirm that your internet connectivity can handle the load shift.

This is especially relevant for businesses running VoIP, video conferencing, or real-time applications. Cloud-hosted tools assume a good connection. If yours isn't there, you'll feel it in every meeting and every dropped call.

3. Security and Identity Baseline

Cloud migration is the moment every permission gap in your environment becomes visible. If your on-premises setup has users with more access than they need, those permissions will follow them into the cloud unless you intervene.

Before migrating, confirm that multi-factor authentication is enforced across all accounts. Audit who has admin rights and why. Define your identity and access management policies for the cloud environment before the first workload lands there.

This step gets skipped most often. It also causes the most expensive problems. 47% of organizations experienced at least one major outage after moving applications to cloud environments (Gitnux 2026). A meaningful share of those outages trace back to misconfigurations that a pre-migration security review would have caught.

4. Backup and Recovery Plan

Moving to the cloud does not mean your data is automatically backed up. Most cloud platforms offer high availability within their infrastructure, but that's different from having a recoverable backup of your data on an independent system.

Establish your recovery time objective and recovery point objective before you migrate. In plain terms: how long can your business be down, and how much data can you afford to lose? Those two numbers should drive every backup and DR decision you make during the migration.

Businesses that skip this step learn it the hard way. The third-party cloud environments that Amgen disclosed were breached in July 2026 are a good reminder that cloud-hosted data still needs protection and recovery planning that doesn't depend solely on the primary vendor.

5. Staff Readiness

Cloud platforms work differently from on-premises systems. Your IT team needs to understand the new environment. Your end users need to understand the new tools.

Forty-eight percent of organizations hit skill gaps during cloud migrations (Redgate 2026). Twenty-nine percent said insufficient training contributed to migration failure. This isn't a technical problem. It's a change management problem.

Build training time into the project plan. Account for the fact that your team will be running two environments during the transition. Under-resourcing this phase is one of the most predictable ways a migration runs over schedule.

The Workloads That Migrate Well (and the Ones That Don't)

Start with what works. Email and collaboration tools have a 94% migration success rate and the shortest learning curve. File storage and backup land at 92%. CRM systems at 91%.

On the other end: legacy and custom applications come in at 61%. ERP systems like SAP and Oracle average 14 months to migrate and cost about 2.8x more per user than email migrations.

The practical implication: sequence your migration to build momentum. Get the high-success-rate workloads into the cloud first, stabilize them, then tackle the complex ones. The businesses that do it backward, attempting the hardest migrations first, tend to run out of patience and budget before they finish.

The Lift-and-Shift Trap

Lift-and-shift migrations move applications to the cloud without modifying them. They're faster, which makes them appealing. They complete about three times faster than refactoring projects.

The catch: lift-and-shift migrations result in 40% higher ongoing cloud costs (Accenture). You're paying cloud pricing for a workload that was designed for on-premises infrastructure, which often means over-provisioned compute, inefficient storage usage, and costs that keep climbing without optimization.

Lift-and-shift is a reasonable starting point for some workloads. It is not a final destination. If your plan ends with lift-and-shift and no optimization phase, your cloud bill will reflect it within 12 months.

The Case for Using a Migration Partner

The Forrester data is worth putting plainly: 71% of partner-led cloud migrations finish on time and within budget. Self-managed projects land at 49%.

That gap isn't because businesses are bad at IT. It's because cloud migrations require a combination of skills, experience with failure patterns, and bandwidth that most internal teams don't have all at once while also keeping the rest of the business running.

A managed IT partner has seen what breaks. They know which applications create migration surprises. They can run the assessment, structure the sequence, configure the security baseline, and stay on it through the tail end of the project, when most migrations stall out.

The readiness assessment alone is worth it. Organizations that do a formal assessment before migrating are 2.4x more likely to succeed. That's not a coincidence.

---

Frequently Asked Questions

How long does a cloud migration take for a 50-person business? It depends on the workload mix. Email and collaboration migrations can be completed in weeks. A full migration including legacy applications, ERP systems, and custom software typically takes 12 to 18 months for businesses in the 50-to-150-person range. The timeline extends when unexpected application dependencies surface, which is why the inventory step matters.

What's the biggest mistake businesses make before a cloud migration? Skipping the readiness assessment. Organizations that do a formal assessment before migrating see 2.4x higher success rates (Accenture). Most businesses that struggle started without a complete picture of what they had running and what it connected to.

Should a growing business do a lift-and-shift or refactor its applications? Lift-and-shift is faster but results in 40% higher ongoing cloud costs. Refactoring takes longer but produces better cost and performance outcomes over time. A practical middle path: lift-and-shift the straightforward workloads, then refactor the ones with high ongoing cost implications.

What cloud provider is best for a 25-to-100-person business? The answer depends heavily on what you already use. Businesses running Microsoft 365 have a natural on-ramp to Azure because identity and admin tooling already align. Those on Google Workspace often find Google Cloud a logical fit. The best choice is rarely theoretical. It's the one that has the least friction with your existing stack, which is worth assessing before you commit.

Does using a managed IT partner really improve cloud migration outcomes? The data says yes. Forrester's research shows partner-led migrations succeed at 71%, compared to 49% for self-managed projects. The difference shows up most in complex workloads, security configuration, and the optimization work that follows the initial move.