WordPress Migration Cost Calculator: Estimate Your CMS Migration Budget

After 15+ years migrating sites from Joomla, Drupal, Squarespace, and custom CMS platforms to WordPress, we built this calculator from real project data — not industry averages. Get an honest cost range before you talk to anyone.

Most “WordPress migration cost” estimates you find online are wildly inaccurate because they ignore the variables that actually drive cost: custom functionality, integration complexity, SEO preservation requirements, and timeline. This calculator walks you through each factor so you arrive at a realistic number.

How Much Does a WordPress Migration Cost?

Based on projects we’ve completed, WordPress migrations range from $2,500 to $75,000+. That wide range reflects real differences in project complexity — not padding. A simple brochure site migration is fundamentally different from migrating a media platform with 15,000 articles, custom subscription logic, and deep CRM integrations.

Migration Type	Typical Range	What Drives Cost
Simple brochure site (under 50 pages)	$2,500 – $8,000	Content migration, basic theme, redirects
Mid-size business site (50–300 pages)	$8,000 – $25,000	Custom functionality, integrations, SEO complexity
Large content site (300–2,000+ pages)	$25,000 – $75,000+	Media library, complex redirects, editorial workflows
Enterprise / media platform	$75,000+	Custom plugins, API integrations, performance at scale

The 6 Cost Factors (And What They Actually Cost)

1. Number of Pages and Posts

Raw content volume is the baseline. But it’s not just copying pages — it’s ensuring every piece of content migrates with its metadata, images, categories, and relationships intact.

• Under 50 pages: $500–$1,500 for content migration
• 50–500 pages: $1,500–$5,000 depending on complexity
• 500–5,000 posts: $5,000–$15,000 with scripted migration tools
• 5,000+ posts: $15,000–$35,000+ for large media and news sites

2. Custom Functionality and Business Logic

This is the most unpredictable cost factor. Every CMS accumulates custom features over the years — member portals, calculators, booking systems, e-commerce flows, custom search. Each piece needs to be rebuilt in WordPress (not just “migrated”).

• No custom functionality: $0 additional cost
• Light customization (contact forms, basic CPTs): $1,000–$3,000
• Moderate (member areas, advanced search, WooCommerce): $5,000–$20,000
• Heavy (subscription billing, multi-site, editorial workflow): $20,000–$50,000+

3. Third-Party Integrations

CRM connections, marketing automation, analytics platforms, payment processors, ad systems — each integration that worked in your old CMS needs to be rebuilt or reconnected in WordPress. Budget roughly $500–$3,000 per integration depending on complexity.

• Simple embed/API key integrations (HubSpot forms, Google Analytics): $500–$1,000 each
• Bidirectional data sync (CRM sync, e-commerce with ERP): $2,000–$5,000 each
• Custom API integrations: $3,000–$10,000+ depending on complexity

4. Media Library Size

Images, PDFs, videos, and attachments all need to migrate with correct URLs and references. Large media libraries require scripted migration, image optimization passes, and CDN configuration.

• Under 500 media files: $300–$800
• 500–5,000 files: $800–$3,000
• 5,000+ files: $3,000–$8,000+ (often requires CDN migration)

5. SEO Redirect Complexity

This is where migrations often go wrong. If your URL structure changes (and it almost always does), every old URL needs a 301 redirect to its new equivalent. Botched redirects can tank years of SEO equity overnight.

• Simple URL structure, under 100 redirects: $500–$1,500
• Complex URL patterns, 100–1,000 redirects: $1,500–$5,000
• 1,000+ redirects with pattern mapping: $5,000–$12,000
• Add SEO audit and recovery plan: $2,000–$5,000 additional

6. Timeline and Urgency

Standard project timelines (8–16 weeks) are priced as written above. Compressed timelines mean more parallel development, more people, and a premium on that resource allocation.

• Standard timeline (8–16 weeks): Base pricing
• Accelerated (4–8 weeks): 25–40% premium
• Rush (under 4 weeks): 50–100% premium depending on scope

Real Example: SAM Magazine’s Joomla-to-WordPress Migration

When SAM Magazine (SAMinfo.com) came to us, they had a large Joomla platform with years of industry content, a custom magazine-style layout, and readership that depended on fast, reliable access to their archives. A botched migration wasn’t an option.

The project involved scripted content migration for thousands of articles, custom WordPress theme development to match their editorial design standards, redirect mapping for their entire archive, and performance optimization for their audience. The result was a modern WordPress platform that preserved their search rankings, improved page load times, and gave their editorial team tools they could actually use — without the Joomla maintenance overhead.

Projects like this land in the $25,000–$50,000 range when you factor in content volume, custom functionality, SEO preservation, and the performance requirements of a media platform. That’s not a number you’ll find on a generic “migration cost” blog post — it comes from actually doing the work.

Calculate Your Migration Cost

Use the ranges above to build your estimate. Here’s a quick worksheet:

1. Content volume: How many pages/posts? ___
2. Custom functionality: None / Light / Moderate / Heavy → $___
3. Integrations: Number and type → $___
4. Media library: Approximate file count → $___
5. SEO redirects: Estimated redirect count → $___
6. Timeline: Standard / Accelerated / Rush → add ___%
7. Add 15–20% for project management, testing, and contingency

Add those numbers together and you have a realistic budget range. If your calculation comes out between $15,000 and $75,000, you’re almost certainly looking at a project that benefits from working with an experienced WordPress agency rather than a freelancer or DIY approach — the stakes are too high for guesswork.

What’s Not Included in These Estimates

These ranges cover migration and development work. They typically don’t include: ongoing hosting (budget $50–$500/month for managed WordPress hosting), ongoing maintenance retainers, new feature development post-launch, or content creation if you’re refreshing content during migration. These are separate line items worth planning for separately.

Why Zao for Your WordPress Migration

We’re a custom WordPress and Laravel development agency with 15+ years of CMS migration experience. We’ve migrated sites from Joomla, Drupal, Squarespace, Expression Engine, proprietary CMS platforms, and more. We don’t use cookie-cutter migration tools that break custom functionality — we build migration scripts and approaches specific to your project.

More importantly, we treat SEO preservation as a first-class requirement, not an afterthought. Your search rankings represent years of work. We don’t gamble with them.