If you're planning a headless CMS migration in 2026, you've probably already discovered that getting straight answers about cost is absurdly difficult. Every agency gives you a different number. Every CMS vendor's pricing page requires a sales call. And the "it depends" answers on Reddit aren't exactly helpful when you're trying to build a business case.

I've led migrations across Sanity, Payload, Contentful, and Storyblok for clients ranging from 50-page marketing sites to 100k+ product catalogues. This guide is the document I wish existed when I started — real numbers, real tradeoffs, and the hidden costs that nobody warns you about until you're three months into a project.

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Headless CMS Migration Cost Guide 2026: Full Pricing Breakdown

Why Migration Costs Are So Hard to Pin Down

Here's the thing — a CMS migration isn't one project. It's at least four overlapping projects happening simultaneously:

  1. Content modelling and schema design in the new CMS
  2. Data migration from the old system (often the messiest part)
  3. Frontend rebuild or refactoring to consume the new API
  4. Team training and workflow redesign so editors don't revolt

Each of these has its own cost drivers. A site with 200 pages of well-structured content in WordPress is a fundamentally different migration than 200 pages of content built with ACF Flexible Content fields, custom post types, and WooCommerce products with 47 meta fields each.

The numbers I'm sharing here are based on projects we've delivered at Social Animal and rates I've seen across the UK and US agency market in 2025-2026. Your mileage will vary, but these ranges should give you a solid foundation for budgeting.

CMS Platform Pricing Breakdown 2026

Let's start with what you'll pay the CMS vendor itself. This is the easiest cost to research but the hardest to compare apples-to-apples because every platform meters differently.

Sanity

Sanity uses a usage-based pricing model that can be genuinely cheap for small projects and surprisingly expensive at scale.

  • Free tier: 3 users, 500k API requests/month, 20GB bandwidth, 10GB assets
  • Growth: $15/user/month + usage overages. API requests at $1 per additional 100k.
  • Enterprise: Custom pricing, typically $1,500-$5,000+/month depending on usage

The thing about Sanity's pricing that catches people off guard is the API CDN request counting. Every time your frontend fetches content, that's a request. A Next.js site with ISR that rebuilds pages frequently can chew through 500k requests faster than you'd think. I've seen mid-traffic sites (50k monthly visitors) hit 2-3M API requests per month easily.

Sanity's real strength is the completely customizable Studio — it's React-based and you can make it do almost anything. But that customization takes developer time, which costs money.

Payload CMS

Payload is the interesting one in this group because it's open-source and self-hosted by default (with a cloud option now available).

  • Self-hosted: Free forever (MIT license). You pay for hosting.
  • Payload Cloud: Starting at $50/month (Pro), $200/month (Team), Enterprise custom
  • Payload 3.0 (current): Built on Next.js, uses your own database (PostgreSQL or MongoDB)

The appeal is obvious — no per-seat licensing, no API request metering, no bandwidth charges from the CMS itself. But you're trading platform costs for infrastructure management costs. Someone has to maintain that server, handle backups, manage SSL certs, and deal with scaling.

For teams with strong DevOps capability, Payload is often the cheapest option long-term. For teams without it, the cloud offering or the operational overhead can close that gap quickly.

Contentful

Contentful is the enterprise incumbent and prices like it.

  • Free: 5 users, 1 space, 25k records, 2M API calls/month
  • Basic: $300/month — 20 users, 48 content types, 4 locales
  • Premium: Custom pricing, typically $3,000-$10,000+/month

Contentful's pricing jumped significantly in 2024 and has stayed high. The content type limits on lower tiers are a real constraint — 48 content types sounds like a lot until you start modelling a site with events, team members, case studies, blog posts, landing pages, and all their associated reference types.

The API is rock-solid though. I'll give them that. In years of using Contentful, I can count the outages I've experienced on one hand.

Storyblok

Storyblok has positioned itself as the visual-editing-first CMS, and their pricing reflects a more European sensibility (the company is Austrian).

  • Community: Free — 1 user, 1 space, basic features
  • Entry: €99/month — 5 users, custom roles, visual editor
  • Business: €449/month — includes workflows, scheduling, more spaces
  • Enterprise: €2,999+/month — SSO, SLA, premium support

Storyblok's visual editor is genuinely good and saves significant time during content entry. The component-based approach maps well to modern frontend architectures. Where it gets expensive is multi-market setups — if you need multiple spaces for different brands or regions, costs multiply quickly.

Platform Cost Comparison Table

Feature Sanity (Growth) Payload (Cloud Pro) Contentful (Basic) Storyblok (Entry)
Monthly cost (2026) ~$75-200* $50 $300 €99 (~$108)
Users included Pay per user ($15/ea) 5 20 5
API request limits 500k + overages Unlimited (self-host) 2M 1M
Content type limits Unlimited Unlimited 48 Unlimited
Asset storage 10GB (free), then usage 50GB 50GB 25GB
Visual editing Presentation API (new) Live Preview Live Preview Native visual editor
Self-host option No Yes (free) No No
Lock-in risk Medium Low High Medium

*Sanity costs vary significantly based on team size and API usage.

Agency Rates: UK vs US in 2026

Agency rates for headless CMS work have increased roughly 10-15% since 2023, driven by the specialization required and the relatively small talent pool.

UK Agency Rates

Agency Tier Day Rate (GBP) Hourly Rate (GBP) Typical Project Range
Freelancer/Solo £350-600/day £45-75/hr £5,000-25,000
Boutique Agency (5-15 people) £600-950/day £75-120/hr £15,000-75,000
Mid-size Agency (15-50) £900-1,400/day £115-175/hr £30,000-200,000
Enterprise Agency (50+) £1,200-2,000+/day £150-250/hr £75,000-500,000+

US Agency Rates

Agency Tier Day Rate (USD) Hourly Rate (USD) Typical Project Range
Freelancer/Solo $500-900/day $65-115/hr $8,000-35,000
Boutique Agency (5-15) $800-1,400/day $100-175/hr $25,000-120,000
Mid-size Agency (15-50) $1,200-2,200/day $150-275/hr $50,000-300,000
Enterprise Agency (50+) $1,800-3,500+/day $225-450/hr $100,000-750,000+

A few notes on these numbers. First, "headless CMS migration" commands a premium over general web development because it requires both backend API knowledge and modern frontend framework expertise (typically Next.js or Astro). Second, US rates include significant geographic variation — a New York or San Francisco agency charges very differently from one in Austin or Raleigh.

At Social Animal, we sit in the boutique-to-mid-size range and work with clients on both sides of the Atlantic. You can see our pricing structure for current rates.

Headless CMS Migration Cost Guide 2026: Full Pricing Breakdown - architecture

Data Migration Costs

This is where projects go sideways. Data migration is consistently the most underestimated line item in CMS migration budgets.

What Makes Data Migration Expensive

Content volume: Migrating 500 blog posts is different from migrating 50,000 product pages. But it's not linear — the first 100 items take 80% of the effort (building the migration scripts and mapping), and the remaining items run through the pipeline.

Content complexity: A blog post with a title, body, author, and featured image? Simple. A product page with 30 custom fields, variant relationships, cross-sells, reviews, multi-language content, and SEO metadata? That's a different beast entirely.

Rich text and embedded media: Migrating rich text content from WordPress (stored as HTML with shortcodes) to a structured format like Sanity's Portable Text or Contentful's Rich Text is genuinely hard. You need custom parsers, and there will be edge cases.

URL redirects: Every URL that changes needs a redirect. Miss one and you lose SEO equity. For large sites, redirect mapping alone can take 20-40 hours.

Typical Data Migration Costs

Scenario Estimated Cost (UK) Estimated Cost (US) Timeline
Simple blog (< 500 posts, basic fields) £2,000-5,000 $3,000-8,000 1-2 weeks
Marketing site (50-200 pages, mixed content types) £4,000-12,000 $6,000-18,000 2-4 weeks
E-commerce (1,000-10,000 products) £8,000-25,000 $12,000-40,000 3-8 weeks
Large editorial (10,000+ articles) £12,000-35,000 $18,000-50,000 4-12 weeks
Multi-language + multi-market Add 40-80% Add 40-80% Add 50-100%

Here's a simplified example of what a migration script might look like when moving WordPress content to Sanity:

// Simplified WordPress to Sanity migration script
import { createClient } from '@sanity/client'
import { htmlToBlocks } from '@sanity/block-tools'
import { wpClient } from './wp-rest-api'

const sanity = createClient({
  projectId: 'your-project',
  dataset: 'production',
  token: process.env.SANITY_WRITE_TOKEN,
  apiVersion: '2026-01-01',
})

async function migratePosts() {
  const posts = await wpClient.posts().perPage(100).get()
  
  for (const post of posts) {
    const sanityDoc = {
      _type: 'post',
      _id: `wp-${post.id}`, // Deterministic IDs for re-runs
      title: post.title.rendered,
      slug: { current: post.slug },
      body: htmlToBlocks(post.content.rendered, blockContentType),
      publishedAt: post.date,
      // Image migration is its own nightmare
      featuredImage: await migrateImage(post.featured_media),
    }
    
    await sanity.createOrReplace(sanityDoc)
    console.log(`Migrated: ${post.slug}`)
  }
}

In practice, this script would be 10x more complex. You'd handle pagination, rate limiting, image asset uploading, author references, category/tag taxonomies, custom fields, retry logic, and validation. The htmlToBlocks conversion alone often needs custom rules for shortcodes, embeds, and weird formatting.

Hosting and Infrastructure Costs

With a headless setup, you're typically paying for two things: CMS hosting (covered above) and frontend hosting.

Frontend Hosting

Most headless frontends in 2026 deploy to either Vercel, Netlify, Cloudflare Pages, or AWS (via Amplify or custom setups).

Provider Free Tier Pro/Team Typical Monthly (mid-traffic)
Vercel 100GB bandwidth, hobby use $20/user/month $50-300/month
Netlify 100GB bandwidth, 1 member $19/user/month $40-250/month
Cloudflare Pages Unlimited bandwidth $25/month (Workers Paid) $25-100/month
AWS Amplify 12-month free tier Pay-as-you-go $30-500/month

Vercel's pricing has been a point of contention. Their bandwidth overages and function invocation costs can surprise you. For a Next.js site with moderate traffic (100k+ visits/month), expect $100-300/month on the Pro plan after overages. Cloudflare Pages is aggressively cheap by comparison, especially if you're using Astro or another framework that can target their edge runtime.

Self-Hosted Payload Infrastructure

If you're going the Payload CMS route with self-hosting, add these costs:

  • VPS/Cloud server: $20-100/month (DigitalOcean, Hetzner, Railway, Render)
  • Managed database: $15-50/month (PostgreSQL on Neon, Supabase, or PlanetScale for MySQL)
  • Object storage (for media): $5-25/month (Cloudflare R2, AWS S3)
  • CDN: $0-25/month (Cloudflare free tier covers most cases)

Total self-hosted Payload infrastructure: roughly $40-200/month for a typical mid-size site.

Frontend Rebuild Costs

Unless your existing frontend is already consuming content via API (rare), you'll need to rebuild it. This is usually the largest single cost in a migration.

What Drives Frontend Costs

  • Number of unique page templates: Each distinct layout needs building
  • Interactive features: Search, filtering, forms, authentication, e-commerce
  • Performance requirements: Edge rendering, image optimization, Core Web Vitals targets
  • Design changes: Are you migrating the existing design or redesigning simultaneously?

My strong advice: don't redesign and migrate at the same time unless you have the budget and timeline for it. Pick one. A like-for-like frontend rebuild to Next.js or Astro, consuming content from a new headless CMS, is already complex enough. Throwing a design overhaul on top doubles the scope and makes it nearly impossible to isolate bugs.

Frontend Rebuild Cost Ranges

Site Complexity UK Cost US Cost Timeline
Simple marketing site (5-15 templates) £8,000-20,000 $12,000-30,000 4-8 weeks
Mid-size site (15-30 templates, some interactivity) £18,000-45,000 $28,000-70,000 6-14 weeks
Complex site (30+ templates, search, auth, e-commerce) £40,000-100,000+ $60,000-150,000+ 12-24+ weeks

We typically recommend Next.js for sites that need server-side rendering or complex interactivity, and Astro for content-heavy marketing sites where performance is the primary concern. Both work excellently with all four CMS platforms discussed here. Check out our headless CMS development capabilities for more detail on how we approach these builds.

Total Cost of Ownership: 3-Year Comparison

Let's put it all together. I'll model a realistic mid-size project: a B2B SaaS marketing site with ~100 pages, a blog with 500+ posts, 5 editor users, 150k monthly visitors, and a Next.js frontend on Vercel.

Cost Component Sanity Payload (Self-hosted) Contentful Storyblok
Year 1: Migration
CMS licensing (Y1) $1,800 $0 $3,600 $1,296 (€1,188)
Agency: Schema + data migration $15,000 $15,000 $15,000 $15,000
Agency: Frontend rebuild $40,000 $40,000 $40,000 $35,000*
Agency: Training + handover $3,000 $3,000 $3,000 $2,500
Frontend hosting (Vercel) $2,400 $2,400 $2,400 $2,400
CMS hosting/infrastructure $0 $1,200 $0 $0
Year 1 Total $62,200 $61,600 $64,000 $56,196
Years 2-3: Ongoing
CMS licensing (per year) $1,800 $0 $3,600 $1,296
Frontend hosting (per year) $2,400 $2,400 $2,400 $2,400
Infrastructure (per year) $0 $1,200 $0 $0
Maintenance + updates $6,000 $8,000** $5,000 $5,000
Annual ongoing $10,200 $11,600 $11,000 $8,696
3-Year TCO $82,600 $84,800 $86,000 $73,588

Storyblok's visual editor can reduce some frontend development time for component-based pages.

*Payload self-hosted requires more maintenance effort — dependency updates, security patches, database management.

A few observations from this modelling:

  1. Platform licensing is a relatively small part of total cost. The difference between the cheapest and most expensive CMS is dwarfed by agency and development costs.
  2. Payload's "free" licensing is offset by infrastructure and maintenance costs. It's still the cheapest option if you have in-house DevOps, but the gap narrows with agency maintenance.
  3. Contentful's higher licensing compounds over time. That $3,600/year adds up, especially if you grow into their Premium tier.
  4. Storyblok's visual editing genuinely reduces build costs for marketing-heavy sites where editors need to compose pages from components.

Hidden Costs That Will Blow Your Budget

Every CMS migration I've done has hit at least two of these. Budget for them.

1. Content Cleanup Before Migration

Your existing content is messier than you think. Broken links, inconsistent formatting, orphaned pages, duplicate content. You'll either clean it up before migration (recommended) or deal with it after (more expensive). Budget 10-20% of migration costs for content audit and cleanup.

2. SEO Redirect Mapping

If your URL structure changes (and it usually does), you need comprehensive redirect mapping. For a 500+ page site, this is easily 20-40 hours of work. Miss critical redirects and watch your organic traffic crater. One client of ours lost 30% of organic traffic for 6 weeks because the previous agency missed redirecting paginated blog archives.

3. Third-Party Integration Rewiring

Forms, analytics, CRM connections, marketing automation, search — everything that connected to your old CMS needs reconnecting. Each integration is typically 4-16 hours of work.

4. Preview and Draft Workflows

Editors expect to preview content before publishing. Setting up draft/preview modes in a headless architecture is more complex than most teams estimate. With Next.js Draft Mode and CMS webhooks, you're looking at 8-24 hours of development work depending on the CMS.

5. Image Migration and Optimization

Images rarely migrate cleanly. Different CMS platforms use different image processing pipelines, and you'll often need to re-upload and re-process thousands of images. If your old site used WordPress's multiple image size generation, you need to decide how to handle that in the new system.

6. Localization Complexity

If you have (or plan to have) multi-language content, this multiplies complexity across every layer: content modelling, data migration, frontend routing, and CMS configuration. Each additional language typically adds 30-50% to migration costs.

How to Reduce Migration Costs Without Cutting Corners

Phase the migration. You don't have to migrate everything at once. Start with the most critical content types, launch, then migrate secondary content. This reduces risk and spreads costs.

Invest in content modelling upfront. Spend more time on schema design before writing any migration code. A well-designed content model makes everything downstream cheaper. I've seen projects where a single day of extra content modelling saved three weeks of development time.

Use a CMS that matches your team's technical capability. If your content team isn't technical, Storyblok's visual editor will save you money in training and support. If your dev team loves code-first approaches, Sanity or Payload will feel more natural.

Automate migration scripts, don't migrate manually. Even for small sites, writing migration scripts pays for itself because you'll run them multiple times — during development, QA, and final cutover.

Work with an agency that specializes in headless. A general web agency will take longer and make more mistakes than one that does this every week. We've built our practice around exactly this kind of work — get in touch if you want to talk specifics for your project.

FAQ

How long does a typical headless CMS migration take? For a mid-size marketing site (50-200 pages), expect 8-16 weeks from kickoff to launch. This includes content modelling (1-2 weeks), data migration development (2-4 weeks), frontend build (4-8 weeks), and testing/QA (2-3 weeks). Larger or more complex sites can take 6-12 months. The timeline is rarely limited by technical work alone — content review and stakeholder approvals are often the bottleneck.

Is Payload CMS really free? What's the catch? Payload CMS is genuinely MIT-licensed and free to self-host. There's no catch in the licensing sense. The trade-off is that you're responsible for hosting, database management, backups, security updates, and scaling. For teams with DevOps experience, this is a great deal. For teams without it, Payload Cloud (starting at $50/month) or the operational overhead of managing infrastructure narrows the cost advantage compared to fully-managed platforms.

Should I migrate from WordPress to a headless CMS? It depends on your pain points. If your main issues are slow page loads, poor developer experience, security vulnerabilities, or the need for multi-channel content delivery, a headless CMS migration makes sense. If your editors are happy, your site performs well, and you just need a design refresh, you might be better off with a WordPress theme rebuild or using WordPress in headless mode with WPGraphQL. Not every site needs to go headless.

Which headless CMS is cheapest for a small business? For a small business with limited technical resources, Sanity's free tier is hard to beat — you get a generous amount of API requests and 3 users at no cost. If you have a developer who can manage self-hosting, Payload CMS costs nothing for the software itself. Storyblok's free Community tier is the most limited (1 user) but their Entry tier at €99/month includes a visual editor that can significantly reduce your dependency on developers for content changes.

What's the biggest risk in a CMS migration? SEO traffic loss. Every migration changes something about how your content is served, and search engines need time to reindex. The biggest risk factors are: changed URL structures without proper redirects, broken internal links, slower page loads (which can happen if the new frontend isn't properly optimized), and metadata that didn't migrate correctly. Always run a full crawl comparison (using Screaming Frog or Sitebulb) before and after migration to catch issues.

Can I keep my existing frontend and just swap the CMS? Only if your existing frontend already consumes content via API. If you're on a traditional server-rendered CMS like WordPress with PHP templates, you'll need a frontend rebuild. There's no way around it — the whole point of headless is that the frontend is decoupled. Some teams try to use WordPress as a headless backend to avoid a CMS migration entirely, which can work but comes with its own complexity.

How do I choose between Sanity, Payload, Contentful, and Storyblok? It comes down to four factors: your team's technical skill level, your budget, your content editing workflow needs, and your scaling requirements. Sanity is best for developer-heavy teams that want maximum customization. Payload is ideal for teams that want full control and have DevOps capability. Contentful suits enterprise teams that need reliability and don't mind paying for it. Storyblok is the best fit when non-technical editors need to build pages visually. We help clients make this decision regularly through our headless CMS development services.

Do I need a headless CMS agency or can my in-house team handle migration? If your in-house team has experience with modern frontend frameworks (Next.js, Astro, etc.), API integrations, and the specific CMS you're migrating to, they can absolutely handle it. Where most in-house teams struggle is with data migration scripting, preview/draft workflow setup, and the CMS-specific gotchas that only come from having done multiple migrations. A common approach is to bring in a specialized agency for the migration itself and then hand off to the in-house team for ongoing maintenance. This gets you the expertise where it matters most without a long-term agency dependency.