How long does an SEO company take to complete an audit?
Long enough for a person to check what the tools find, which is the difference between an audit and a crawl report. A crawler produces a list of issues as fast as it can fetch the pages; an audit, in which someone confirms those findings on the site, weighs them against your goals, and turns them into a prioritized plan, takes longer, and how much longer depends on the site and the scope. No standard duration applies to every site, so the useful answer is a written timeline from the company, based on your site’s size and the agreed scope, with dates for each stage.
What decides the length
Size is the first factor, but structure matters as much as page count. A small site with custom code, several subdomains, or versions for different countries can take longer to audit than a larger site built on a few clean templates, because each template and each special case has to be examined.
Depth matters as well: a review limited to the most serious technical problems is quicker than one that also covers content quality, site structure, links, speed, and the competitors who rank for your searches. A broader scope is a reason for a longer timeline, not a sign of slow work.
Access is the factor most within your control, because the audit cannot start properly until the company can see your Analytics, Search Console, content management system, and, for larger sites, server logs. Waiting for logins and approvals can add more calendar time than the analysis itself.
Limits the tools set
Some checks run against limits set by the tools themselves. Search Console’s URL Inspection tool reports how Google sees an individual page, and its programmatic version has a quota: Google’s Search Console API usage limits set the URL inspection quota at 2000 queries per day per site. At that rate, inspecting 20,000 pages one by one through the API would take at least ten days, so on a large site the company has to sample pages or rely on reports that summarize indexing, and should tell you which it did.
Working time and calendar time
A quoted duration can mean hands-on hours or elapsed days, and the two differ. Elapsed time includes scheduling, waiting for access, crawling and processing data for a large site, and reviewing the draft with you. Ask which one the estimate describes.
A dated timeline before the audit starts
Ask for a timeline in writing tied to your site and scope, with milestones: access granted, crawl and data collection complete, findings drafted, report delivered, review meeting held. Ask what the company needs from you and by when, and what would move the dates. A promise of a complete technical and strategic audit that leaves no time for review describes a tool’s output, not a reviewed plan; an estimate with no milestones at all makes it hard to tell whether the work is on track.