SEO has no fixed timetable. Google’s guide for site owners says some changes take effect in a few hours and others take several months, and it suggests waiting a few weeks before judging one. Of 33 agency websites that describe an SEO service, 16 put a number on it, most often three to six months. Ask which result the number refers to.
Which result are you waiting for?
“Results” covers three things, and each runs on its own clock. Google’s SEO Starter Guide and its pages on crawling and ranking give the first two.
| Result | What has to happen first | What Google says |
|---|---|---|
| A fix is picked up | Google crawls the page again | A few days to a few weeks. Asking again for the same page doesn’t speed it up |
| Visibility rises | Google’s systems reassess the page and the site | Hours for some changes. After content improvements, a few days to several months |
| Traffic and sales rise | People click, and the page persuades them | Nothing. That depends on the searches, the page and the offer |
Google adds two limits. A request to crawl a page doesn’t guarantee it a place in the results. Where a few months pass with no effect, Google says it could take until the next core update. A core update is one of the broad changes it makes to its ranking systems several times a year.
How a fix is confirmed in Search Console is covered in the article on telling a real SEO audit from a tool export.
What 33 agency websites say
Agency pages carry timings, and each is a claim to test. In October 2026 we read the SEO pages of the 40 agencies profiled for this directory, and 33 have one. Sixteen give a figure in months, six say only that it takes time, and 11 give no timing.
Seven of the 16 give the same range, three to six months, for different results. One means first improvements, with the larger gains at 6 to 12 months. One means results that affect revenue or leads. One means measurable revenue growth. Outside that range, one says 60 to 90 days for “meaningful movement” and one says 9 to 12 months for noticeable improvements.
Three attach a guarantee to a date. One refunds the fee if positions don’t improve within 90 days. One gives free months if the keywords it proposes miss page one in six months. One works free from month six until revenue rises.
Google’s advice on hiring an SEO says no one can guarantee first place, and to beware of anyone who guarantees rankings. Read a dated guarantee for who chooses the keywords and what counts as improved.
What to ask to see each month
Ask for figures that move before sales do. Search Console, Google’s free report on your own site, holds them, and Google suggests checking it about once a month.
| Evidence | What it shows | What it doesn’t prove |
|---|---|---|
| Pages indexed | The fixes were picked up | That the pages rank for anything |
| Impressions by search | How often people saw your site in results | That anyone clicked |
| Clicks from Google Search | People arrived | That they bought |
Position is an average, so ask for it search by search. Google’s own questions for a prospective SEO include what results it expects, in what timeframe, and how it measures success. Get the answers in writing.
What moves the date
Four things outside the agency’s skill move the date. The first is the site’s age. One agency’s page gives one to three months to lift an existing page from page two to page one, and six months to a year for a new site.
The second is competition: a search that rivals have worked on for years takes longer to enter. The third is a site move, where Google says a medium-sized site can take a few weeks or more to show its new addresses. The fourth is your own queue. A fix that waits six weeks for your developer adds six weeks.
Work aimed at AI answers has no clearer clock. SEO and generative engine optimisation covers what can be measured there.
Ask for dated checkpoints before you sign
A minimum term that ends before the first evidence arrives asks you to judge work you haven’t seen. Say a proposal promises results in three to six months on a six-month minimum. Ask for three dates inside it: fixes indexed, impressions for named searches, then clicks.
The guide to agency contracts covers terms and notice. Then compare the SEO agencies listed here, or the UK SEO agencies, on what each will show you and when.