Website Migration SEO

Migrate your website without losing your rankings

A website migration is one of the highest-risk moments in any business's digital life. Done without proper SEO planning, it can wipe out years of hard-won rankings in days. Our senior specialist manages the full process so your organic traffic survives the move intact.

Pre-migration crawl analysis
Full redirect mapping
Post-migration monitoring
SplinterSEO Migration Redirects
09:41
splinterseo.com · Migration Redirect Audit
Redirect audit · Post-migration report
URLs mapped
247
100% covered
301 redirects
214
no chains
Traffic retained
94%
+2% vs target
Old URL
Status
/old-product-category/widgets/
301
/shop/widgets/
200
/blog/2019/how-to-choose.html
301
/resources/choosing-the-right-widget/
200
/services/old-page-no-redirect/
404
Redirected
214
404 errors
11
Traffic retained
94%
Need help with your website migration? Talk to the SplinterSEO team today.
Get in touch
What is a website migration?

The riskiest moment in your website's life

A website migration covers any significant structural change to your site: moving to a new domain, changing your URL structure, switching platforms, migrating from HTTP to HTTPS, or merging two sites into one.

Each of these changes disrupts the signals Google has been building trust in for months or years. Without a careful SEO migration strategy, rankings drop, organic traffic disappears, and revenue follows. The impact can last months even after the technical issues are resolved.

Our approach covers every layer of the migration, from a full pre-launch crawl and redirect mapping through to post-launch monitoring in GA4 and Google Search Console. We also coordinate with your developers and platform team so nothing falls through the gaps.

Domain change Platform switch URL restructure HTTP to HTTPS Site merger Subfolder to subdomain International expansion
60%
of migrations cause measurable ranking losses due to poor redirect planning
6mo+
average recovery time for businesses that migrate without SEO oversight
247
average redirects mapped per migration project we handle
94%
average organic traffic retained across migrations we have managed
Common migration mistakes

What businesses get wrong when migrating

Most migration SEO problems are entirely avoidable. They stem from treating the migration as a purely technical or design exercise, with SEO considered only after launch.

Redirect chains and loops

Businesses map redirects in spreadsheets without checking for chaining. A 301 that points to another 301 dilutes link equity and slows crawling. Loops cause Googlebot to give up entirely.

Impact: lost link equity, crawl errors

Missing redirects for high-value pages

URL structures change and hundreds of old URLs are left returning 404 errors. Pages that earned backlinks over years stop passing any authority to the new site.

Impact: 404s, lost backlink authority

Crawl budget squandered on staging

A staging environment indexed by accident or robots.txt not updated on launch means Googlebot crawls the old staging site instead of the new live one. Rankings collapse within days.

Impact: indexation failure, ranking drop

No benchmark data captured before launch

Without a clear traffic and rankings snapshot taken before the migration, there is no way to tell whether a post-launch dip is a migration problem or normal seasonal fluctuation.

Impact: no recovery baseline to work from

On-page signals lost in the redesign

A new design strips out carefully optimised title tags, heading structures and internal links that took months to build. Developers copy page content but ignore the metadata, schema markup and canonical tags entirely.

Impact: ranking signals reset to zero

Site merges handled without consolidation

When two sites merge, duplicate content across both domains can appear unless canonical tags and redirects are implemented methodically. Google may split authority across both properties for months.

Impact: duplicate content, diluted authority
Pre-migration

Everything we do before launch day

The pre-migration phase is where the majority of migration SEO work happens. By the time your new site goes live, every ranking signal should be mapped, documented and ready to transfer. The goal is that launch day is uneventful.

We begin with a comprehensive SEO audit of your current site so we have a complete baseline. That audit informs every decision in the migration plan.

Full-site crawl and URL inventory

Every indexed URL on the current site is crawled and catalogued. We record status codes, title tags, meta descriptions, H1s, canonical tags, internal links and backlink counts for each page.

Traffic and rankings benchmark

We export a full traffic and keyword rankings snapshot from GA4 and Google Search Console before any changes are made. This is the baseline we compare against after launch.

Redirect map creation

Every old URL is mapped to its new equivalent. We prioritise pages with organic traffic, backlinks and internal link equity. Redirect chains and loops are eliminated before the map is signed off.

On-page metadata migration

Title tags, meta descriptions, heading structures, alt text and schema markup are all transferred or improved for the new site. No ranking signal is left behind.

Staging environment review

We check that the staging site is blocked from indexation via robots.txt and noindex tags, and that these are removed correctly on launch. A staging site indexed by Google is one of the most common and costly migration errors.

Launch-day checklist preparation

A detailed launch-day checklist is prepared for your development team. This covers sitemap submission, Search Console property verification, hreflang (if applicable), crawl rate settings and immediate post-launch checks.

Post-migration

What happens after your new site goes live

Launch day is not the finish line. The weeks following a migration are critical. Google needs time to recrawl, reindex and re-evaluate your new site. During this window we watch closely and act quickly on any signals that need attention.

Post-migration monitoring runs for a minimum of 90 days across all projects. For larger sites or domain changes, this window extends to six months.

Crawl error monitoring

We monitor Google Search Console daily in the first two weeks for any spike in crawl errors, 404s or redirect failures. Issues are triaged and passed to your development team with precise fix instructions.

Days 1 to 14

Indexation rate tracking

We track how quickly Google is indexing your new URLs against the old indexed count. A significant shortfall signals a crawl budget or sitemap problem that needs immediate investigation.

Weeks 1 to 4

Keyword ranking comparison

Tracked keywords are compared against the pre-migration benchmark weekly. Pages that have lost significant ranking positions are reviewed individually and remediation steps are identified.

Weeks 2 to 12

Organic traffic reporting

Monthly reports compare organic sessions, click-through rates and conversions against the pre-migration baseline in GA4. Reports include commentary on what is happening and any actions being taken.

Monthly for 90+ days

Backlink and authority verification

We verify that referring domains are reaching live 200-status pages via correct 301 redirects. Any high-authority backlinks still pointing to 404s are flagged for outreach.

Weeks 2 to 6

Core Web Vitals and technical SEO checks

Platform changes often affect page speed and Core Web Vitals. We run a post-launch technical review to identify any regressions in LCP, CLS or INP scores that could affect rankings.

Week 1 and week 6
Scope of work

What we cover across every migration

Every migration project is different, but each one draws from the same set of disciplines. Select a category to see exactly what is included.

Technical SEO

The technical foundation of a migration determines how well Google can discover and index your new site. Our technical SEO work starts before launch and continues until all signals are healthy.

Full redirect implementation
All 301 redirects built and tested before launch. Chains and loops resolved.
Robots.txt and sitemap
Staging blocks removed, sitemap updated and submitted in Search Console.
Canonical tag audit
All canonical tags updated to new URLs. Self-referencing canonicals verified.
Core Web Vitals review
LCP, CLS and INP measured and compared against pre-migration values.
Hreflang (international sites)
Hreflang tags configured correctly for any site targeting multiple languages or regions.
Crawl budget analysis
Crawl stats reviewed to confirm Googlebot is discovering the right pages.
On-page SEO

Every ranking signal on the page needs to transfer to the new site. Our on-page SEO work ensures no optimised element is lost in the rebuild.

Title tag migration
All optimised title tags carried across. Improved where the new URL structure allows.
Meta description review
Meta descriptions updated to reflect new URLs and any messaging changes.
Heading structure audit
H1, H2 and H3 hierarchies verified on all key landing pages post-launch.
Schema markup transfer
Schema markup updated with new URLs and validated against Google's Rich Results Test.
Internal link update
All internal links updated to point directly to new URLs, not through redirects.
Image alt text audit
Image alt attributes preserved and reviewed for descriptive accuracy on key pages.
Content and structure

Keyword research informs the URL structure and content hierarchy of the new site. We review any structural changes against your target search queries before launch.

URL structure review
New URL slugs reviewed against target keywords. Changes recommended where slugs reduce ranking potential.
Page consolidation advice
Thin or duplicate pages identified. Merging and canonicalisation strategy agreed before migration.
Content gap identification
New site architecture reviewed against search demand to identify any gaps created by the restructure.
Navigation and silo structure
Site navigation reviewed for SEO-friendly category and topic structure. Internal link equity flow mapped.
Analytics and tracking

A migration is only measurable if tracking was correctly configured before it happened. We verify GA4 and Search Console are capturing the right data throughout the process.

GA4 property audit
GA4 events, goals and filters reviewed before migration. Tracking verified post-launch.
Search Console setup
New property verified and change of address tool used if the domain has changed.
Pre-migration data export
Traffic, rankings and click data exported and saved as a permanent benchmark for comparison.
Conversion tracking verification
All conversion events tested post-launch. Any broken form or checkout tracking fixed immediately.
Our process

How a migration project works

Every migration follows the same structured sequence. The timeline varies by site size, but the steps never change.

1

Discovery and audit

We crawl your current site, export rankings data and map your full URL inventory against organic performance.

Week 1
2

Migration strategy

Redirect map, URL structure recommendations, on-page migration plan and a staging review checklist are prepared.

Weeks 2 to 3
3

Staging review

The new site is reviewed on staging against the migration strategy. All issues are logged and resolved before launch sign-off.

Week 4
4

Launch day support

We are available on launch day to run immediate post-launch checks: crawl, redirect test, sitemap submission and Search Console verification.

Launch day
5

Monitoring and recovery

Weekly monitoring for 90 days minimum. Rankings, crawl errors, indexation and traffic tracked against the pre-migration baseline.

90 days+

Planning a migration? Start with a conversation.

The earlier we are involved, the more risk we can prevent. We work alongside your developers, agency or platform team from day one.

Discuss your migration
Why SplinterSEO

Why businesses trust us with their migrations

A website migration is not the place to cut costs or hand the SEO work to a developer who dabbles in it. The financial cost of a botched migration, in lost rankings and months of recovery effort, far exceeds the cost of getting it right first time.

Our team has managed migrations across multiple platforms, including WooCommerce, Shopify, WordPress and custom-built systems. We are based in Donaghadee, serving businesses across Northern Ireland, the UK and the Republic of Ireland.

Talk to us before you migrate

SEO is the first consideration, not the last

Most agencies bolt SEO on after the migration has been designed. We involve ourselves from the initial architecture decisions so that SEO is baked in, not retrofitted.

Full documentation at every stage

Every decision, redirect map, crawl report and monitoring result is documented and shared. You always know exactly what has been done and why. Nothing is a black box.

A senior specialist on every project

Your migration is handled by a senior specialist, not passed to a junior account manager or outsourced. Every decision is made by someone with deep technical SEO experience.

90-day minimum post-launch monitoring

We do not consider a migration complete on launch day. Post-launch monitoring runs for a minimum of 90 days so that any recovery work is identified and acted on quickly.

Platform-agnostic approach

We work across all major platforms. Whether you are moving to Shopify, rebuilding in WordPress, or migrating from a custom CMS, our approach adapts to your technical environment. We work directly with your developers using clear, implementation-ready instructions.

Clear communication throughout

You will never wonder what is happening. We provide plain-English updates at every stage and flag any risks before they become problems. If something needs your attention, you hear about it promptly.

FAQ

Website migration SEO questions

A website migration does not have to hurt your SEO. When managed with a proper pre-migration audit, full redirect mapping, on-page signal transfer and post-launch monitoring, organic traffic can be maintained through the migration with minimal disruption. Some businesses even use a planned migration as an opportunity to improve their SEO. The risk comes from migrations executed without SEO oversight, where redirect chains, missing 301s and lost metadata cause ranking drops that can take months to recover from.
Recovery time after a website migration depends on the scale of the changes and how well the migration was managed. For a well-planned migration with clean redirects and preserved on-page signals, Google typically recrawls and reindexes the new URLs within 4 to 8 weeks. For domain changes, full authority transfer can take 3 to 6 months. For poorly managed migrations with many 404 errors or broken redirects, recovery can take 6 months or longer, and some ranking losses may be permanent without active remediation work.
Yes. A developer handles the technical build of the new site, but SEO migration requires a separate set of knowledge: understanding which URLs carry ranking value, how redirect chains affect link equity, how to preserve canonical tags and schema markup, and how to monitor rankings and crawl data after launch. Most developers are not trained in these areas. The two roles complement each other. We work alongside your developers and provide them with clear, implementation-ready instructions for every SEO requirement.
A 301 redirect is a permanent redirect that tells search engines an old URL has moved to a new location. It passes the majority of the ranking signals and link equity from the old page to the new one. Without 301 redirects, old URLs return 404 errors, and any backlinks or authority those pages had accumulated is lost. Redirect chains, where a 301 points to another 301, reduce the amount of equity passed and should be resolved so that old URLs redirect directly to the final destination.
We cover all common types of website migration: domain changes, URL structure changes, platform migrations (such as moving to Shopify or WordPress), HTTP to HTTPS migrations, site mergers and acquisitions, international site restructures, and subdomain to subfolder migrations. Each type carries different SEO risks and the migration strategy is adapted accordingly.
The cost of SEO migration support depends on the size of your site, the type of migration and the level of monitoring required after launch. A small site migration may require a one-off project engagement, while a large ecommerce migration with thousands of URLs and 90 days of post-launch monitoring is a more substantial piece of work. We provide a clear scope and fixed quote once we have reviewed your site.
You should involve an SEO specialist as early as possible in the migration process, ideally before the new site architecture has been finalised. The earlier we are involved, the more risk we can prevent. If the URL structure is already set and the new site is being built, we can still carry out a pre-migration audit and redirect mapping. If you contact us after launch and rankings have already dropped, remediation is possible but takes longer and is more expensive than prevention.

Contact Us For Website Migrations