The Real Cost of SharePoint Migration (2026)

Phase-by-Phase Cost Breakdown

A SharePoint migration is not a single activity. It is a sequence of distinct phases, each with its own cost drivers, skill requirements, and failure modes. Here is what each phase actually costs in 2026:

Phase 1: Discovery and Assessment ($15,000 - $75,000)

This is where you inventory your current environment: site collections, content databases, custom solutions, workflows, permissions structures, and integrations. The cost scales with environment complexity, not just size.

• Small (under 500 users): $15,000-$25,000 — 2-3 week assessment with automated scanning tools.
• Mid-market (500-5,000 users): $25,000-$50,000 — 4-6 week assessment including custom code inventory and workflow mapping.
• Enterprise (5,000+ users): $50,000-$75,000 — 6-10 week assessment with multi-farm analysis, M&A tenant discovery, and compliance mapping.

Skipping or compressing discovery is the single most expensive decision organizations make. Every dollar saved in discovery costs three to five dollars in remediation later.

Phase 2: Content Cleanup and Rationalization ($10,000 - $100,000)

The average SharePoint environment contains 40% ROT content — files no one has accessed in two or more years, duplicate documents, abandoned sites, and orphaned data. Migrating this content wastes money and creates governance debt in the new environment.

• Content audit tooling and analysis: $5,000-$15,000
• Business stakeholder review sessions (the real bottleneck): 40-80 hours of business user time
• Archival policy definition and execution: $5,000-$20,000
• Large enterprise cleanup with records management requirements: $50,000-$100,000

Phase 3: Permissions Remediation ($20,000 - $150,000)

Permissions are where migrations stall. On-premises SharePoint environments accumulate permission debt over years — broken inheritance, direct user permissions instead of groups, nested AD groups with unknown membership, and permissions granted to accounts that no longer exist.

In SharePoint Online, the permissions model is different. Entra ID replaces Active Directory. Microsoft 365 Groups replace SharePoint groups for team sites. Sensitivity labels add a new governance layer. Every permission structure must be mapped, validated, and transformed.

• Simple environments: $20,000-$40,000 — Clean AD groups, minimal broken inheritance.
• Complex environments: $40,000-$100,000 — Extensive broken inheritance, direct permissions, nested groups.
• M&A / multi-tenant: $100,000-$150,000 — Cross-tenant identity mapping, trust relationships, compliance boundaries.

Phase 4: Workflow and Custom Code Remediation ($25,000 - $200,000)

This is the phase that blows budgets. If your SharePoint environment uses any of the following, plan for significant remediation costs:

• InfoPath forms: No equivalent in modern SharePoint. Must be rebuilt in Power Apps or custom SPFx solutions. $5,000-$15,000 per complex form.
• SharePoint Designer workflows: Must be rebuilt in Power Automate. $2,000-$10,000 per workflow depending on complexity.
• Custom web parts (farm solutions): Must be rebuilt as SPFx components. $10,000-$50,000 per web part.
• Timer jobs and event receivers: Must be rebuilt as Azure Functions or Logic Apps. $5,000-$20,000 each.
• Custom SSRS integration: Must be migrated to Power BI or paginated reports. $10,000-$30,000.

Phase 5: Records Retention and Compliance ($10,000 - $75,000)

For regulated industries — healthcare, financial services, government — records retention is not optional. Content must be classified, labeled, and assigned retention policies before migration.

• Retention schedule mapping: $5,000-$15,000
• Microsoft Purview retention policy configuration: $10,000-$25,000
• Legal hold identification and preservation: $5,000-$20,000
• Compliance validation and documentation: $5,000-$15,000

Phase 6: Migration Execution ($20,000 - $200,000)

The actual data migration — ironically the phase most proposals focus on — is often the most straightforward part. Cost depends on volume, throttling management, and cutover strategy.

• Migration tool licensing (ShareGate, AvePoint, Metalogix): $10,000-$50,000
• Migration engineering labor: $20,000-$100,000
• Delta sync and cutover management: $5,000-$25,000
• Validation and rollback procedures: $5,000-$25,000

Phase 7: Training and Change Management ($15,000 - $75,000)

A migration that users reject is a failed migration regardless of technical success. Training must cover modern SharePoint navigation, Teams integration, OneDrive vs SharePoint usage patterns, and new governance policies.

• Training content development: $5,000-$15,000
• Live training sessions (role-based): $10,000-$30,000
• Champion network setup and enablement: $5,000-$15,000
• Change management communications: $5,000-$15,000

Phase 8: Post-Migration Support ($15,000 - $100,000)

The 90 days after go-live are critical. Issues surface that testing missed: broken links, missing metadata, permission gaps, workflow failures, and user confusion. Budget 20-30% of total project cost for post-migration support.

Total Cost Summary by Organization Size

The Hidden Costs Most Proposals Miss

• Custom code nobody documented: Legacy SharePoint environments often contain farm solutions, event receivers, and timer jobs that IT forgot about. These break silently during migration and cost $50,000-$200,000 to remediate.
• Third-party tool licensing: Migration tools are licensed per-user or per-GB. A 10,000-user migration can incur $30,000-$50,000 in tool licensing alone.
• Throttling management: Microsoft 365 throttles large migrations. Managing throttling requires specialized engineering and extends timelines by 20-40%.
• M&A complexity: Merging two SharePoint tenants involves cross-tenant identity mapping, content conflicts, governance policy alignment, and often legal review. Add 50-100% to base migration costs.
• Business disruption costs: Downtime during cutover, productivity loss during the learning curve, and help desk volume spikes are real costs that never appear in migration proposals.
• Ongoing governance: Post-migration, someone must maintain site provisioning policies, retention labels, and permissions governance. This is a permanent operational cost, not a project cost.

How to Get an Accurate Migration Estimate

Do not accept a fixed-price migration proposal without a completed discovery phase. Any vendor quoting a firm price based on a one-hour conversation and a rough user count is guessing — and they will scope-creep or cut corners when reality diverges from their assumptions.

EPC Group's approach separates the scoping engagement from the migration engagement:

• Scoping Workshop (1-2 weeks, fixed fee): Environment scan, custom code inventory, permissions analysis, compliance requirements, and a detailed migration plan with phase-by-phase cost ranges.
• Migration Engagement: Priced against the scoping workshop deliverables with defined scope, assumptions, and change order procedures.

This two-step approach costs more upfront but eliminates the budget overruns that plague migrations started without adequate discovery.

Frequently Asked Questions