Website redesign SEO: what a redesign can cost you in leads, and how to keep them.
A redesign rarely breaks anything you can see on launch day. The damage shows up two weeks later, in rankings and leads, on the pages that bring them in. Below: one real case, a calculator for your own number, and the checks I run before a redesign goes live.
The short answer.
A redesign loses rankings when the new site says less than the old one on the pages that bring in leads, or moves those pages to new addresses. New templates get built, and copy that doesn't fit the new design gets dropped. To keep your rankings, list the pages that bring in leads, write down what each one says and which searches it ranks for before design starts, and check the new version against that list before launch.
What it cost one page.
A B2B financial services company had one page that sold its core product, with a cost calculator at the top. Part of the copy under the calculator was cut, because the calculator already showed what the product costs. Nothing on the page broke. Two weeks later its leads had fallen by more than half.
| Before | After | |
|---|---|---|
| Leads a month from the page | 19 | 8 |
| Clicks a week from the main search | 16 | 6 |
| Position for the main search | 7 | 14 |
Before is February and March 2026, after is April and May 2026, from Search Console and the company's lead data. The copy went back in May and the page was rebuilt in June. Leads came most of the way back through smaller, more specific searches. The main search did not: five months after the drop it was still at 11 to 12, just off page 1.
That was one page and one edit. A redesign makes the same kind of edit on every page at once. The full case, week by week, is on the blog.
What it could cost you.
Enter the leads your site gets from organic search in a month and what one lead is worth to you. The calculator applies the drop from the case and the recovery time a late-caught drop takes.
With 30 leads a month, 124 leads and about €62,000 at risk over 12 months.
And the category's main search was still off page 1 after 5 months.
| Month | Leads |
|---|---|
| Before | 30 |
| Month 1 | 16 |
| Month 2 | 10 |
| Month 3 | 12 |
| Month 4 | 14 |
| Month 5 | 16 |
| Month 6 | 18 |
| Month 7 | 20 |
| Month 8 | 22 |
| Month 9 | 24 |
| Month 10 | 26 |
| Month 11 | 28 |
| Month 12 | 30 |
How this is worked out. The drop comes from one page at one company: its leads fell to 53% of normal in the first month and 32% in the second. The recovery time comes from my migration risks page: a drop caught late takes 6 to 12 months to win back, and this uses the 12-month end, a straight climb from month 3.
Part of that company's dip was seasonal, because its first quarter is its strongest. Its total leads held up, because other pages caught some of the demand. The number is what is at risk, not a forecast. Nothing you type here is stored or sent.
The redesign checklist.
These are the checks specific to a redesign, in the order they come up. For redirects, launch day and the rest of a full move, use the SEO migration checklist.
Before design starts
- List the pages that bring in leads, from your CRM or analytics, not the pages with the most traffic. These are the pages the redesign has to protect.
- Write down what each of those pages says and ranks for: its word count, its headings and the searches it ranks for, with positions. It takes about five minutes a page and gives you something to compare against if rankings move.
- Put tool pages on a protected list. Calculator, comparison and configurator pages don't get edited without an SEO check, the same way the checkout doesn't get edited without a test. Their copy looks like padding to a designer, and it is often what ranks.
During design and build
- Give every copy block on the protected pages a place in the new template. If the template has no slot for a section, the section disappears.
- Keep the headings that carry your search terms. A new design often swaps them for a slogan.
- Keep the addresses. If a page has to move to a new URL, the redesign has become a migration and needs a redirect map (see the next section).
- Compare the staging site with the live site for each protected page: same copy, same headings, same internal links.
Launch week
- Check the protected pages on the new live site against what you wrote down before design started.
- Watch leads from those pages every week, not total traffic. Total traffic can hold while the pages that sell lose their rankings.
If a page drops
- Compare its text first with the last archived version, before you look at links or technical issues. In the case above, the connection was made in May, and every week before that was another week at position 14.
When a redesign is a migration.
A redesign often comes with a new platform, new URLs or a new navigation. Any one of those makes it a website migration, with the risks that come with one. A migration without SEO coverage typically loses 30 to 60% of its organic traffic, and how long recovery takes depends on when the drop is caught. The migration risks page explains why. My migration service page covers how I run one.
Before you launch.
If the calculator gave you a number you don't want to risk, book a call before the new site goes live.
- On the call: 30 minutes, free. You tell me what the redesign changes and which pages bring in your leads. I tell you where the risk sits. If you don't need anything from me, you hear that on the call.
- What it costs after: if the risk needs a proper check, the next step is the Migration Risk Assessment: €2,500 excl. VAT, delivered in 5 business days from access. If we work together on the migration within 60 days of receiving it, the €2,500 is credited in full.
- What could go wrong: the assessment names the risks and the fix for each, but it can't overrule a design your team has already signed off. Whether the copy stays is still your decision. I work with B2B companies only.
Already launched and losing traffic? The Migration Recovery Triage is built for that.