The single biggest fear about a redesign is the honest one: that the new site will perform worse than the old one. It usually does — for a while. Google is explicit that during a move with URL changes “you may experience ranking fluctuations while Google recrawls and reindexes your site”, and that for a medium-sized site “most pages” take a few weeks to move across in the index. What separates a dip from a loss is not the design. It is whether every old URL still resolves to the right new one, and whether the new site is genuinely better on the things that were already working. Click through each phase below for what happens, what to measure, and what a normal month looks like.
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— Timeline
What happens to your traffic after a redesign.
Traffic almost always dips before it improves. The dip is normal; losing it permanently is not, and the difference is decided in the first week.
The first 12 months, phase by phase
Month 0 is launch day. Select a phase to see what happens in it, what to measure, and the milestones that fall inside it.
Month 0
Cutover
Launch week. Almost everything that determines whether the next six months are a dip-and-recover or a permanent loss is decided here, and most of it is unglamorous plumbing rather than design.
What actually happens
- If URLs changed, every old address needs a permanent redirect to its closest new equivalent. Google treats 301 and 308 as a signal that the target should be canonical; a 302 or 307 tells it the opposite, and the old URL can stay in results instead.
- Redirecting everything to the homepage is the classic mistake. It technically resolves, passes a spot check, and destroys the relevance of every page that used to rank.
- Internal links change even when URLs do not. A page that used to be two clicks from the homepage and is now buried five levels down will be recrawled less often and will drift down regardless of its content.
- Analytics and Search Console frequently break at exactly the moment you most need them — a missing tag or an unverified new property means the dip is invisible rather than absent.
What to measure
- Every old URL returns a 301 to a relevant page, not to the homepage and not through a chain of hops.
- Server errors and soft 404s in Search Console, checked daily for the first week.
- That analytics is recording at all, compared against server logs rather than against itself.
- Sitemap submitted and referencing the new URLs only.
Milestones
- M0Redirect map validated end to end
- M0Search Console and analytics confirmed recording
Months are elapsed time from relaunch, not calendar months. Magnitudes vary with site size and how much changed; the order does not.
Why the dip happens at all
A redesign changes three things Google has already formed an opinion about: the addresses of your pages, the words on them, and how they link to each other. Even when the design is objectively better, all three have to be recrawled and re-evaluated before anything settles.
That is why the dip is a normal feature of the process rather than evidence of a mistake. What is not normal is a dip that never recovers — and that almost always traces back to redirects that were incomplete, or to content quietly removed because it did not fit the new template. If you want the underlying mechanics, our SEO timeline covers what indexing does on a brand-new site.
The three mistakes that turn a dip into a loss
First, redirecting everything to the homepage. It passes a casual check because nothing 404s, and it throws away the specific relevance every ranking page had earned.
Second, treating content as decoration. Trimming a page to make the layout breathe is a design decision with a ranking consequence, and it is the most common self-inflicted loss in a redesign.
Third, changing the URL structure without a reason. If there is no measurable benefit to a new pattern, keeping the old addresses removes an entire class of risk for free. Where the structure genuinely must change, that is a UI / UX design decision that should be made deliberately and mapped before launch, not discovered afterwards.
What a healthy relaunch looks like in numbers
Impressions stop falling within about two months. Index coverage is back near pre-launch by month three. Traffic returns to baseline somewhere between month four and month six, and conversion rate is usually already ahead of the old site before traffic catches up.
If your line looks materially worse than that, the cause is diagnosable rather than mysterious — and it is nearly always one of the three mistakes above. A free UX or SEO audit will identify which one before you spend anything on fixing the wrong thing.
Sources
The quoted guidance on fluctuation, indexing time and redirects is Google’s own, from Search Central. Checked August 2026.
- Google Search Central — Site moves with URL changes ↗
Confirms ranking fluctuation during a move is expected, that a medium-sized site takes a few weeks for most pages to move in the index, and that redirects should be kept for at least a year so signals transfer.
- Google Search Central — Redirects and Google Search ↗
The distinction the dip usually hinges on: 301 and 308 signal the target should be canonical, while 302, 303 and 307 do not and can leave the old URL in results.
- Google Search Central — Core Web Vitals and Google Search results ↗
Google states good Core Web Vitals align with what its ranking systems reward, while stopping short of promising a ranking gain — the basis for the caveat in the final phase.
— FAQ
Frequently asked questions
Planning a redesign, or recovering from one?
We will tell you what the risk actually is before you commit — and if traffic already dropped, which of the three causes it was.