How long does SEO take to work?

"How long will it take?" is the question every London business asks and the one agencies answer worst. Some say thirty days; some say nine months; a few say both on different pages of the same website. The honest answer is that SEO runs on three clocks at once, and which one you are watching decides what you will see and when.

This guide sets out the three clocks, a month-by-month timeline for a typical London business, the factors that speed it up or slow it down, and the leading indicators to watch in the first ninety days. The ranges are from our own work and from Google’s published guidance; where we quote another agency’s timeline we say whose it is and when we checked it.

The honest answer: three clocks

Google’s own starter guide says that "some changes might take effect in a few hours, others could take several months", and suggests waiting a few weeks before judging whether a change helped. That is a wide range because different kinds of work move at different speeds.

Those three ranges are the ones we publish on our own pages, and they come with the same caveat everywhere: they are typical, not guaranteed, and the monthly report shows you which range your site is in. Any agency that gives you one number for all three is simplifying; any agency that gives you a number shorter than the first row is selling.

Why nobody can give you one number

Four things decide the pace, and only one of them is the agency.

How often Google crawls your site

A large, trusted, frequently updated site is crawled constantly and sees changes reflected within days. A small or new site may be crawled every few weeks. Nothing you do shows in results until Google has re-read the page.

Who you are competing with

For a searcher in Ealing looking for a boiler repair, the competition is a few dozen local firms. For a searcher anywhere in London looking for a commercial solicitor, it is every firm in the City with a decade-old website. The second takes longer because the sites you must overtake have more history, more content and more links.

Where your site starts

A site with technical problems, thin pages or a history of bought links has to be repaired before it can grow. A clean site with good content and no authority has the opposite problem: nothing to fix, everything to build. A brand-new domain has no history at all and typically takes longest to rank for anything competitive.

How fast you can approve and ship

Content needs sign-off; technical changes need a developer; a new location page needs photographs. Every week a recommendation sits in a queue is a week added to the timeline. In our experience the client’s approval speed moves the timeline as much as anything the agency does.

A month-by-month timeline

The table below describes a typical London business that starts with a working site, moderate competition and a retainer that includes technical, content and local work. Faster starts and slower ones are covered in the next section.

What changes the pace

A new website versus an established one

A business that has traded online for ten years and never done SEO usually moves fastest: the site already has history and links, and fixing it releases value quickly. A brand-new domain is the slowest case; it can take most of a year to rank for anything beyond the business name. If you are launching a new site, start the SEO work before launch rather than after, and keep the old URLs redirecting if you had any.

Local versus competitive

A single-location business in an outer borough will often see its map pack position and its calls move inside a quarter. A business competing for London-wide head terms should budget for six to twelve months before judging. If you need results in weeks, SEO is the wrong channel for that need and paid search is the honest answer; the two are often run together for exactly this reason.

Penalties and past shortcuts

If a previous agency bought links or spun content, the first months are spent undoing it, and recovery can take as long as the original work. The penalties guide explains the signs. Ask any agency you consider to check for this in the audit and to tell you plainly if they find it.

Platform and development access

Direct access to a WordPress or Shopify site means fixes ship the week they are found. A bespoke platform with a development queue can turn a two-week technical clock into a two-month one. Agree before you start who makes changes and how quickly.

Budget and scope

More budget does not make Google crawl faster, but it does mean more pages, more content and more links in each month, which brings the competitive clock forward. The cost guide shows what each budget band typically includes.

What to watch before rankings move

Rankings are the last thing to move. In the first ninety days, watch the leading indicators instead; they tell you whether the work is taking hold long before a position changes.

• Indexed pages and crawl errors in Search Console: fixed pages should be re-indexed and error counts should fall within the technical clock.
• Impressions in Search Console: your pages appearing for more searches, even on page three, is the first sign of movement, usually visible from month two.
• Google Business Profile actions: profile views, calls, direction requests and website clicks, available in the profile’s own performance report.
• Click-through rate on pages whose titles and descriptions were rewritten: a rise here shows up within weeks.
• Page speed and Core Web Vitals field data, which updates as real visitors load the improved pages.
• Work done: the plainest indicator of all. If the report does not list the pages built, the fixes made and the links earned, nothing else in it can be trusted.

What agencies promise, and why they disagree

Published timelines vary more than the underlying reality does, because they are written for different purposes. On its home page, Breakline says most clients "see initial improvements within 30-60 days", while its pricing page says clients notice a meaningful increase in traffic and enquiries "around month nine" (profile checked 9 Oct 2026). Both can be true: the first describes the technical clock, the second the competitive one. The SEO Works’ London page says you "might see small changes in 1-2 months" and that "bigger improvements often take 3-6 months" (profile checked 9 Oct 2026), which is closer to our own ranges.

The lesson is not that one agency is right. It is that you should ask which clock a promise refers to, and insist that the proposal states a timeline for each of the three.

A worked example: ranges, not best cases

When we publish a result we publish the range across the terms we tracked, not the best number. For Leam Taxis, a private hire firm in Leamington Spa (not London, and we say so), local search work took the business to first place for airport-transfer searches; across the tracked terms, impressions rose by 60 to 300 percent, website clicks by 50 to 200 percent and calls by 30 to 150 percent, measured in Google Business Profile, Search Console and GA4. The spread is the point: some terms moved a little, some a lot, and a single headline figure would have hidden that. The case study carries the figures and their sources.

For a London business the same pattern holds. A restaurant in Whetstone, a clinic in Richmond upon Thames and a law firm in Holborn will each see some searches move early and some late, and the honest report shows all of them.

When to worry, and when to stop

A fair retainer gives you two checkpoints.

1. Month three. The technical work should be done and visible, impressions should be rising, and for a local business the profile metrics should have moved. If none of that has happened and the report cannot explain why, something is wrong with the work or the plan.
2. Month six. You should be able to point to enquiries, calls or sales that came from search and were not there before, even if the competitive head terms have not yet moved. If you cannot, ask for the plan to change or stop.

This is why the terms matter so much. On a rolling agreement with 30 days’ notice you can act on either checkpoint. On a twelve-month minimum term with an exit fee you cannot, and the timeline becomes a debt rather than a plan. Our own terms are set out before you sign; the contracts guide shows what others require.

If you want to know which clock your own site is on today, the free SEO audit will tell you: what is holding it back, what would move first, and roughly how long each part should take.

Get your free SEO auditA person reviews your site within two working days. Three fields, no call required.