50 Cloud Migration Statistics for 2026 — Success & Failure Rates

94% of enterprises now use cloud services, yet 38% of migration projects still exceed their original budget, and 31% miss their planned timeline. This page compiles 50 cloud migration statistics covering success rates, cost overruns, failure causes, repatriation trends, and platform-specific data. Use these benchmarks to plan your own migration or validate your approach.

Migration Market Size & Growth

Cloud migration is no longer optional — it's the default infrastructure strategy. The broader cloud computing statistics for 2026 show why: public cloud spending alone is approaching $700 billion. The migration services market reflects this shift with sustained double-digit growth.

1. $31.5 billion — the cloud migration services market in 2026, growing at 22.4% CAGR (MarketsandMarkets).
2. 94% of enterprises use at least one cloud service in 2026, up from 89% in 2023 (Flexera).
3. 60% of all corporate data is now stored in the cloud, up from 30% in 2015 (Statista).
4. Cloud migration is the #2 IT priority for CIOs in 2026, behind only cybersecurity (Gartner CIO Survey). The corresponding data center buildout reflects $650+ billion in spending to support these migrations.
5. By 2028, 75% of enterprise workloads will be in cloud or edge environments, up from 52% in 2024 (Gartner).

Success & Failure Rates

Migration success depends on planning, tooling, and experience. These statistics show where organizations succeed and where they fail.

6. 65% of cloud migrations are completed on time and within budget — up from 54% in 2022 as tools and methodologies mature.
7. 38% of migrations exceed their original budget, with the average overrun at 23% above planned costs (IDC).
8. 31% of migrations miss their planned timeline, with complexity of legacy applications as the #1 cause.
9. Organizations that conduct a formal readiness assessment before migrating have 2.4x higher success rates.
10. 18% of migration projects require rolling back at least some workloads due to performance, cost, or compatibility issues.
11. Companies using a dedicated migration services provider report 71% on-time completion vs. 49% for DIY migrations.

Migration Costs & Budget Overruns

Migration costs extend well beyond the compute bill. Application refactoring, data transfer, testing, training, and post-migration optimization add up fast. The 2026 IT spending data shows data center systems growing 16.5% year-over-year as organizations fund these transitions.

12. The average cost to migrate a mid-market company's workloads to cloud is $280,000, including services, tooling, and first-year costs.
13. Enterprise migrations (5,000+ users) average $1.2–$4.5 million depending on complexity and number of applications.
14. Data transfer (egress) fees account for 6–12% of total migration costs — a cost many organizations underestimate.
15. Application refactoring represents 34% of total migration spend when organizations modernize rather than lift-and-shift.
16. Post-migration cloud costs are 23% higher than estimated in the first 12 months, primarily due to right-sizing failures.
17. Organizations that invest in cloud cost optimization during migration save an average of $430,000 in the first year.

Migration Timelines

Migration timelines vary dramatically based on workload complexity, data volume, and organizational readiness.

18. Email-only migrations (e.g., on-premises Exchange to Exchange Online) average 2–4 weeks for 500-user environments.
19. Full Microsoft 365 migrations including email, SharePoint, OneDrive, and Teams take 4–8 weeks for mid-market companies.
20. IaaS migrations (10–50 virtual machines) average 2–4 months including assessment, migration, and validation.
21. Full data center migrations take 6–18 months for organizations with 100+ applications and complex dependencies.
22. 47% of migration delays are caused by legacy application dependencies that weren't identified during assessment.
23. Organizations that run a pilot migration of 5–10% of workloads first reduce overall migration time by 28%.

Multi-Cloud & Hybrid Cloud

The single-cloud strategy is dying. Most organizations run workloads across multiple providers, though managing that complexity introduces its own challenges.

24. 82% of enterprises use two or more cloud providers, up from 76% in 2024 (Flexera State of the Cloud).
25. 73% of organizations operate a hybrid cloud environment with both on-premises and public cloud workloads.
26. The average enterprise uses 3.4 public clouds and 2.1 private clouds simultaneously.
27. AWS + Azure is the most common multi-cloud combination, used by 54% of multi-cloud organizations.
28. AWS + Azure + Google Cloud is used by 28% — typically for workload-specific optimization.
29. Multi-cloud complexity adds an average of $1.4 million per year in management overhead for large enterprises.

Cloud Repatriation

Not every workload belongs in the cloud. A growing number of organizations are moving specific workloads back on-premises after finding that cloud costs or performance don't meet expectations.

30. 25% of organizations have repatriated at least one workload from public cloud to on-premises or colocation (IDC).
31. The top reason for repatriation is cost (54%), followed by performance requirements (31%) and data sovereignty (27%).
32. High-compute, steady-state workloads (databases, rendering) are 3.2x more likely to be repatriated than variable workloads.
33. 67% of organizations that repatriated workloads say they would have stayed in cloud with better cost optimization upfront.
34. Repatriation doesn't mean abandoning cloud — 92% of organizations that repatriated some workloads still increased overall cloud spending.

Migration by Workload Type

Different workloads migrate at different rates. Email and collaboration move fast; complex ERP and database systems take longer and fail more often.

35. 87% of organizations have migrated email and collaboration to the cloud, with a 94% success rate — the highest of any workload category.
36. Database migrations succeed only 79% of the time, with schema incompatibility and performance degradation as primary failure causes.
37. Legacy and custom application migrations have the lowest success rate at 61%, often requiring significant refactoring.
38. ERP migrations (SAP, Oracle) average 14 months to complete and cost 2.8x more per user than email migrations.
39. Lift-and-shift migrations complete 3x faster than refactoring, but result in 40% higher ongoing cloud costs.

Platform-Specific Migration Data

Each cloud platform has its own migration tooling, pricing model, and success rates. These statistics help compare Azure, AWS, and Google Cloud as migration targets.

40. AWS is the primary migration target for 41% of new cloud workloads, followed by Azure at 36% and Google Cloud at 16%.
41. Azure is the #1 choice for Microsoft-centric organizations — 78% of companies with 500+ M365 licenses choose Azure for IaaS.
42. Google Cloud's Migrate for Compute Engine reduces VM migration time by 45% compared to manual processes.
43. Microsoft 365 migrations from on-premises Exchange have a 96% success rate when using Microsoft's native tools with professional migration services.
44. Cross-cloud migrations (e.g., AWS to Azure) take 2.3x longer than on-premises-to-cloud migrations due to egress costs and API differences.

Migration Services & Partners

Most successful migrations involve external partners. These statistics show how professional migration services affect outcomes.

45. 71% of partner-led migrations finish on time and budget, vs. 49% for self-managed migrations (Forrester).
46. Organizations that use a migration partner reduce post-migration incidents by 58% compared to internal-only teams.
47. The average engagement cost for a cloud migration services provider is $35,000–$150,000 depending on scope and complexity.
48. 84% of organizations that used a migration partner said they would use one again for their next migration.
49. MSPs that offer migration services report $42,000 average deal size per migration project, with 35% converting to ongoing managed services contracts.
50. 78% of successful enterprise migrations involved at least one certified cloud architect — either internal or from a migration partner.

Sources

These statistics are compiled from the following research publications:

• Flexera State of the Cloud Report 2025
• Gartner Cloud Migration and Modernization Research 2025/2026
• IDC CloudPulse Migration Survey 2025
• Forrester Cloud Migration Wave Report 2025
• Accenture Cloud Outcomes Study 2025
• MarketsandMarkets Cloud Migration Services Forecast 2026
• Synergy Research Group Cloud Infrastructure Data
• AWS, Microsoft Azure, and Google Cloud public migration reports
• Statista Global Cloud Storage Penetration Data

Statistics are updated as new data becomes available. Last updated: March 2026.