Website Migration SEO
Most traffic drops after a website relaunch are preventable. The ones that aren't are recoverable. Either way, you shouldn't be handling it without specialist support.
Website Migration Services That Protect Your Organic Performance
If your website is about to change; new design, new platform, new domain, or a full relaunch, your organic traffic is at risk. Not because change is bad, but because search engines and AI rely on the signals your existing site has spent years building: its URLs, its structure, its authority, its internal links. A migration changes all of that at once.
Done without specialist SEO support, that process regularly wipes out years of hard-won rankings. Traffic falls. Leads dry up. And the team responsible for the relaunch has to explain to the rest of the business why organic performance has collapsed weeks after launch, when fixing it is harder, slower, and far more expensive than preventing it would have been.
Koozai provides website migration SEO for UK businesses at three stages: before a migration, to protect organic visibility through the transition, and after a migration, when traffic has dropped and the cause needs to be diagnosed and fixed fast.
All of our migration work is delivered through the SAFE SEO Migration Method™ Koozai’s proprietary four-stage framework built to make migration risks visible and manageable before they become expensive problems.
Our SEO migration services are built around one goal: making sure the organic search performance you’ve earned doesn’t disappear when your new site goes live. Whether you need hands-on technical support throughout the project or an expert eye on what your development team is building, we work alongside your team at every stage.
You’re probably here because one of these is true:
- Your site relaunch is approaching and you’re not confident SEO is being handled properly
- Organic traffic has dropped after a migration and you’re not sure why
- A previous migration went wrong and you’re still in recovery
- Your developer doesn’t fully understand the SEO risk of what’s being changed
- Your MD or board is asking why organic leads have slowed since the new site launched
- If any of those are familiar, you’re in the right place.
When your website changes, your search performance is at risk
What’s actually at stake
The business cost of a migration handled without proper SEO oversight is significant and consistently underestimated until it’s too late.
A Search Engine Journal study of website migrations found an average of 229 days for traffic to return to pre-migration levels following a domain move and 42% of sites never fully recovered.
229 days is seven and a half months of reduced organic leads. For a business generating meaningful revenue through organic search, that is not an SEO problem. That is a business problem and it lands on the desk of whoever was responsible for the relaunch.
The difficult truth is that most of those losses were preventable. Not with luck, but with the right process, in the right sequence, before the site went live.
Understanding the SEO impact of a website migration before you start is the difference between a smooth transition and months of traffic recovery. The pages you’ve spent years building authority on, the backlinks pointing to specific URLs, the crawl structure Google has learned, all of it is at risk if the migration isn’t handled with SEO at the centre.
Common consequences of a migration handled without SEO:
- Organic traffic drops 30–70% immediately after launch
- Google continues showing old URLs, generating 404 errors across the site
- Years of optimised page titles and metadata overwritten by CMS defaults
- Redirect errors and loops preventing Google from crawling the new site
- Staging environment accidentally indexed before go-live, creating duplicate content
- New site significantly slower than the old one, suppressing rankings further
- Link equity lost because redirects weren’t mapped correctly
Individually these look manageable. Together, they tell search engines the site they trusted no longer exists
Planning a website change and worried about losing traffic?
Koozai provides website migration SEO for UK businesses planning a site relaunch and emergency recovery services for migrations that have already caused traffic loss. We work with brands at two stages: before a migration, to protect existing search visibility during the transition, and after a migration, when organic traffic has dropped and the cause is unclear.
The problems we most commonly solve include: organic traffic disappearing immediately after a relaunch, Google continuing to index old URLs while refusing to crawl new ones, redirect errors and loops introduced at launch, staging sites accidentally indexed before go-live, and metadata overwritten by default CMS settings during platform migrations.
All of our migration work is delivered through the SAFE SEO Migration Method™, Koozai’s proprietary four-stage framework covering Scope, Audit, Fix, and Evaluate. It is the structured process we developed to make migration risks visible and manageable before they become expensive problems, and it includes a free SEO Migration Risk Checker that gives any brand planning a relaunch a percentage risk score based on their specific migration profile.
A traffic drop after a migration is not inevitable. In most cases it is the result of specific, identifiable technical failures that can be prevented before launch or diagnosed and fixed after it. The length of recovery depends on how quickly the cause is identified and how comprehensively the issues are resolved.
We have published a Website Migration SEO Rescue Guide for brands dealing with post-migration traffic loss, alongside detailed guidance on how to handle a migration correctly, the most overlooked factors during site migrations, essential metrics to monitor after a migration, and why SEO needs to be involved from the start of any migration project. Our migration case studies include work with Designlab and Penson.
Redesigns, replatforms, and domain changes regularly wipe out years of SEO work. Not because the new site is bad, but because search engines lose the signals they trusted before. Rankings fall. Traffic dips. Leads slow down.
It often happens after launch, when fixing it is harder, slower, and much more stressful to explain to the rest of the business.
How Koozai approaches website migration SEO differently
Most agencies treat migration SEO as a checklist. Hand it to a junior, run through the standard steps, sign off at go-live. That approach might catch the obvious issues. It won’t catch the ones that cause 40% traffic drops three weeks after launch.
We built the SAFE SEO Migration Method™ because a checklist is not a methodology. SAFE is a four-stage proprietary framework; Scope, Audit, Fix, Evaluate, developed from handling migrations across retail, travel, healthcare, professional services, and built environment businesses.
It includes the free SEO Migration Risk Checker, a tool that gives any business planning a relaunch a percentage risk score based on their specific migration profile, so you know exactly where the vulnerabilities are before a single redirect is written.
What makes our approach different:
- Senior-led, not delegated. Your migration is handled by experienced SEO specialists. Not juniors learning on your site.
- Proprietary methodology, not a generic process. The SAFE Method is built specifically for migrations not adapted from a general SEO checklist.
- Risk-first thinking. We identify what could go wrong before it does, not after launch when the board is asking questions.
- Clear communication throughout. One point of contact. Calm updates. Straight answers you can share internally.
- We work with your team, not around them. Your developer, your project manager, your deadlines, we fit into the project.
Koozai provides website migration SEO for UK businesses planning a site relaunch and emergency recovery services for migrations that have already caused traffic loss. We work with brands at two stages: before a migration, to protect existing search visibility during the transition, and after a migration, when organic traffic has dropped and the cause is unclear.
The problems we most commonly solve include: organic traffic disappearing immediately after a relaunch, Google continuing to index old URLs while refusing to crawl new ones, redirect errors and loops introduced at launch, staging sites accidentally indexed before go-live, and metadata overwritten by default CMS settings during platform migrations.
All of our migration work is delivered through the SAFE SEO Migration Method™, Koozai’s proprietary four-stage framework covering Scope, Audit, Fix, and Evaluate. It is the structured process we developed to make migration risks visible and manageable before they become expensive problems, and it includes a free SEO Migration Risk Checker that gives any brand planning a relaunch a percentage risk score based on their specific migration profile.
A traffic drop after a migration is not inevitable. In most cases it is the result of specific, identifiable technical failures that can be prevented before launch or diagnosed and fixed after it. The length of recovery depends on how quickly the cause is identified and how comprehensively the issues are resolved.
We have published a Website Migration SEO Rescue Guide for brands dealing with post-migration traffic loss, alongside detailed guidance on how to handle a migration correctly, the most overlooked factors during site migrations, essential metrics to monitor after a migration, and why SEO needs to be involved from the start of any migration project. Our migration case studies include work with Designlab and Penson.
Redesigns, replatforms, and domain changes regularly wipe out years of SEO work. Not because the new site is bad, but because search engines lose the signals they trusted before. Rankings fall. Traffic dips. Leads slow down.
It often happens after launch, when fixing it is harder, slower, and much more stressful to explain to the rest of the business.
What’s included in our website migration SEO service
This is a specialist engagement, not a box-ticking exercise. Here is what you get at each stage.
Before launch, protect what you’ve already earned
- Pre-migration SEO audit and risk log
- Full crawl of the current site to baseline all URLs, rankings, and traffic
- URL-by-URL redirect mapping strategy
- Staging environment SEO review to prevent accidental indexing
- Input into templates, navigation structure, and page rules
- SEO benchmarks for traffic, rankings, and indexation
At launch, control the handover
- Redirect testing at scale before and at go-live
- Robots.txt and indexation verification
- XML sitemap validation and submission
- Analytics and tracking integrity checks
- Go-live technical checklist, signed off by a senior specialist
After launch, stabilise and improve
- Coverage and crawl error monitoring in Search Console
- Ranking and traffic tracking against pre-migration benchmarks
- Priority page re-optimisation where needed
- Internal linking and crawl path fixes
- Clear reporting you can share with your team and stakeholders
Types of migrations we cover:
- Website redesigns
- CMS platform migrations (including Shopify, WordPress, headless)
- Domain changes and rebrands
- Ecommerce replatforming
- HTTP to HTTPS moves
- Multi-site mergers and consolidations
- URL restructures and site architecture changes
Different migrations carry different risks. We tailor the approach to what your specific migration involves, not a one-size-fits-all process.
Proof from real website migrations
We don’t talk about migrations in theory. Here is what protecting and recovering organic performance looks like in practice; across domain moves, platform migrations, post-migration recovery, and multi-site consolidations.
Designlab, full domain migration
Designlab, a leading mentor-led UX and UI design training provider, required specialist SEO support through a full website domain migration, one of the highest-risk migration types. Operating in a highly competitive education sector where even small visibility losses carry significant commercial consequences, there was no margin for a poorly managed transition. With Koozai managing the migration end to end; pre-migration analysis, redirect mapping, indexation monitoring, and post-launch stabilisation, the new domain was indexed quickly, rankings were maintained through the transition, and UX Bootcamp lead conversions increased by 31% in the period following implementation.
Penson, platform migration
Penson, specialist interior designers and architects, came to Koozai needing to protect organic visibility through a full platform migration while managing the challenge of consolidating a fragmented keyword landscape without losing ranking visibility in the process. Through comprehensive redirect mapping, deployment, and testing, all organic traffic and ranking visibility was retained at launch. Three months after migration, Penson had achieved 80% growth in organic sessions, a 103% increase in new users, and a 51% improvement in session duration, followed by an average of 30% month-on-month organic session growth in the months that followed.
“Carrying out a website migration can be a stressful time but Koozai were ready for the technicalities involved and our worries about the potential loss of traffic were put to rest.”
Sarah Bean, Head of Copy, Penson
Ancasta, post-migration recovery
Europe’s largest yacht brokerage network, Ancasta came to Koozai after a migration that had not been managed from an SEO perspective had introduced significant technical failures: missing and incorrect redirects, broken internal linking, metadata not transferred correctly, and search engines unable to properly crawl and index the new site. Koozai conducted a full post-migration audit, rebuilt the redirect architecture, resolved crawl and indexation issues across key commercial pages, and restored authority to the pages driving high-intent yacht buyer traffic. Organic traffic recovered within 3–6 months of the fixes being implemented, with priority pages restoring their rankings for key commercial queries and crawl errors reduced significantly across the site.
Hamble Yacht Services, multi-site merger and consolidation
When Hamble Yacht Services was acquired by and integrated into the Ancasta Group, Koozai was appointed to manage the SEO strategy for the consolidation; ensuring two previously competing sites merged without cannibalising each other’s rankings or losing the organic authority either had built. Through a full URL inventory, backlink analysis, and a detailed 301 redirect strategy with one-to-one mapping of high-value pages, the transition was completed with no loss of traffic, the top 20 keywords maintained positions 1–3 throughout, and the long-term SEO structure of the combined site was strengthened rather than compromised.
These results reflect four different migration scenarios;a domain change, a platform migration, a post-migration recovery, and a multi-site consolidation, all handled with the same senior-led, methodology-driven approach. A checklist gets you to launch day. A methodology gets you through it.
Koozai is a website migration SEO agency and our experts are regularly asked to contribute to industry publications including:
Types of website migration
There are five main types of site migrations, depending on the work that needs to be carried out and what you want to achieve.
Whether you’re planning a full website redesign, a CMS replatform or a domain move, SEO needs to be embedded from the start, not bolted on at the end. The earlier we’re involved, the more we can protect. Migrations where SEO is considered after development has begun almost always require more recovery work post-launch.
The image shows the five main types of migrations. It’s also possible that your site may require a hybrid migration. In other words, a combination of any of the five and it goes without saying that the more changes needed, the more complex and riskier the migration.
Already lost traffic after a migration?
If your site has already launched and organic performance has dropped, you’re not in an unusual position. And in most cases, it’s fixable, the key variable is how quickly you act.
The longer a migration problem sits undiagnosed, the more Google reinforces the wrong signals. Crawl paths bed in. Old authority dissipates. Recovery becomes slower and more expensive.
We run focused SEO migration recovery projects for sites that launched without adequate protection. We’ll tell you honestly what happened, what’s recoverable, and what realistic timelines look like.
Our recovery work typically includes:
- Forensic audit to identify exactly what broke and why
- Redirect gap analysis and repair
- Indexation diagnosis and fixes
- Priority keyword and page recovery plan
- Honest timelines – not optimistic guesses
- Reporting you can use to update your board
Read: Your guide to recovery after a site migration
Read: What is an SEO migration paramedic?
Download: Website Migration SEO Rescue Guide
Website migration SEO: common questions
How do you protect SEO rankings during a website migration?
Protection starts before a single line of code is written on the new site. We baseline your current site’s performance, crawling all URLs, recording rankings, mapping which pages are driving traffic and links. That data drives the redirect mapping strategy, which ensures authority transfers correctly to the new URL structure. We then audit the staging environment before go-live, verify technical settings at launch, and monitor closely in the weeks after. Missing any stage increases the risk of ranking loss significantly.
Read: How to handle a website migration correctly
How long does traffic recovery take after a website migration?
That depends on what went wrong and how quickly it’s diagnosed. For well-managed migrations, a short-term dip of 2–6 weeks is normal as Google recrawls and reindexes the new site. For migrations with significant issues, broken redirects, lost metadata, accidental indexation, recovery is measured in months, not weeks. The Search Engine Journal study puts the average at 229 days for domain moves, with 42% not recovering fully. That’s the cost of getting it wrong.
Read: Your guide to recovery after a site migration
Is my web developer responsible for SEO during a migration?
Your developer is responsible for building the site correctly. They are not typically responsible for preserving your search visibility through the transition — that requires a different skill set. Most developers understand the technical architecture of a migration. Fewer understand how Google interprets redirect chains, crawl budgets, internal link equity, or why metadata defaults in a new CMS template can wipe out years of optimisation. SEO specialists and developers need to work together on migrations. Neither covers for the other.
Read: Why SEO needs to be involved from the start of a migration
What happens to my backlinks if I change my URL structure?
External links pointing to your old URLs are a significant source of authority for your site. If those URLs change without proper 301 redirects in place, that link equity is lost. Even with redirects, some authority dilution is normal; which is why the redirect mapping strategy is one of the most important deliverables in any migration project. Redirect to the most relevant equivalent page, not the homepage. Avoid redirect chains. And wherever possible, reach out to high-value external sites to update their links directly.
Read: Top pages to protect during a migration
What should I do if my website has disappeared from Google after a relaunch?
First: don’t panic, and don’t make large-scale changes without diagnosing the cause. A complete disappearance usually points to one of a small number of specific issues; robots.txt blocking Googlebot, noindex tags applied site-wide, a domain change without proper redirects, or a Search Console configuration issue. The diagnosis needs to happen quickly because Google is making decisions about your new site based on what it finds in the first crawl.
Read: 5 signs your SEO migration has gone wrong
Does website migration SEO work for AI search as well as Google?
AI-powered search surfaces are becoming increasingly important for organic visibility and they have their own requirements. Clear site structure, consistent entity signals, and well-organised content architecture all influence how AI tools discover and use your content. A migration is an opportunity to improve these signals, not just preserve them.
Read: The likely impact of site migrations in the age of AI search
Talk to a Website Migration SEO specialist
Koozai operates as both an SEO website migration agency for businesses who need end-to-end support, and as an SEO website migration consultant for in-house teams who want senior expert oversight without handing over full control. Either way, the outcome is the same: a migration your organic performance survives.
If your site is changing, SEO needs a seat at the table, before decisions are made, not after launch.
Book a call with our migration team. We’ll review your plans, flag the risks that matter, and tell you honestly what level of support your migration needs.
No jargon. No pressure. Just experienced advice from specialists who have handled migrations across retail, travel, healthcare, professional services, and B2B sectors, and who have rebuilt traffic for brands where migrations already went wrong.
Further reading on website migration SEO
Our migration specialists have published detailed guidance on every stage of the migration process:
- How to handle a website migration correctly
- Why SEO needs to be involved from the start of any migration project
- SEO migration checklist: how to not lose traffic
- Top pages to protect during a migration
- Overlooked factors during site migrations
- Essential metrics to monitor after a website migration
- 5 signs your SEO migration has gone wrong
- SEO after a site redesign: don’t let rankings slip
- Your guide to recovery after a site migration
- What is an SEO migration paramedic?
- Your new website could make you invisible to AI. Here’s why
- The likely impact of site migrations in the age of AI search
- Website migration and new site guide
Driving footfall for a top architects and design studio
SEO, PR, and website migration support for a leading UX education provider
Nailing SEO & PPC for the leader in hardwood flooring accessories
Carrying out a website migration can be a stressful time but Koozai were ready for the technicalities involved and our worries about the potential loss of traffic were put to rest. The team worked closely with our design agency to support the entire transition.
Koozai has helped us to realise and fine-tune not only our online presence, but they’ve helped us to stand out from the crowd for the future.
Sarah BeanHead of Copy
FAQs
Can I do an SEO website migration myself?
It is possible to use third party guides on the internet to try and implement your own migration. However, it is generally not advisable to implement a migration unless you have SEO expertise and experience in delivering successful migrations as costly mistakes are easily made. This could result in a drop in rankings and traffic for your website.
Will a website migration harm my SEO?
A quality SEO migration won’t significantly impact your website’s organic SEO traffic in the long term. However, a poorly executed migration can harm your website’s SEO significantly and result in a drop in rankings, which is why it is so important to invest in the services of an SEO specialist who is experienced in website migrations. A poor migration can result in things like broken redirects, duplicate content, and unindexed pages, all of which will hurt your website’s SEO.
How long does an SEO site migration take?
This one really depends on the size of your website, how much content it has and what you want to move over to the new website. A website with less than 100 pages is going to take substantially less time to migrate than a website made up of several hundred or even thousands of pages. Depending on the size of the website and the scope of the project, you can expect it to take anywhere from a month to a few months for a website migration to be fully completed. This is because time is needed to plan, develop a staging site, audit, implement and monitor the migration to ensure nothing goes wrong.
How much does SEO for a website migration cost?
The answer to this one is ‘it depends'. The cost of a SEO support for a website migration can differ depending on the size of the website, the scope of the project and the services required. In all cases, we'd recommend investing early in the process to ensure it's done correctly rather than opting for a “cheap” route, and having to retrospectively fix issues several times over - stalling, or even worse ruining your organic performance in the process. This always ends up costing more.
Get in touch for a quote.
Can you fix SEO problems after a website has already launched?
Yes. Recovery typically involves forensic crawling, redirect fixes, restoring missing signals, repairing internal links, and monitoring Search Console until performance stabilises.
Read: Your guide to recovery after a site migration.
How long does it take to recover traffic after a poorly handled website migration?
Recovery time varies by migration type, site size, and execution quality. A study on domain migrations reported long average recovery periods and that a large proportion did not return to pre-migration levels at all.
What is the best time of year to migrate your website?
Timing depends on your sector and how much revenue is driven by organic search.
Many ecommerce brands avoid major migrations close to peak trading periods such as Black Friday, because recovery volatility can overlap with commercial targets.
Plan your migration window around your lowest-risk period and build in time for post-launch monitoring.
What is a website migration SEO audit?
It is a review of your migration plan or live site to identify redirect gaps, indexation issues, broken internal links, lost page signals, and the highest-risk areas to fix first.
What is website migration SEO?
Website migration SEO protects rankings, organic traffic, and crawl equity when a website changes structure, platform, domain, or URL patterns.
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