Whether you need an SEO audit is not a function of time passing — it is a function of what is happening on your site. Some sites run cleanly for two years without needing a full audit. Others accumulate enough technical debt in six months that rankings slip in ways that are hard to diagnose without one. The question worth asking is whether there are specific signals pointing to a problem you cannot see from inside your analytics.

Signs You Probably Need an Audit

A few patterns consistently show up before clients contact me. If any of these apply, an audit is likely worth the investment:

  • Unexplained organic traffic drop: If traffic fell 15% or more in Google Search Console over a 60-day window and you cannot point to a clear cause (a known Google update, a seasonal pattern, a page you took down), something structural is probably wrong.
  • You recently launched a redesign or migrated to a new CMS: Migrations are the most common source of ranking loss I see. Even well-planned ones leave behind broken redirects, dropped canonical tags, or pages that lost their internal links.
  • You rank for almost nothing despite publishing content: If pages are not getting indexed or are indexing without ranking, that is a technical signal — not a content signal. Content does not rank when crawl issues, canonical conflicts, or thin-page penalties suppress it upstream.
  • Competitors are outranking you on terms you should own: A ranking gap on your core service pages often comes from technical or content quality issues, not from the competitor being fundamentally stronger.
  • Your site has never been audited: If the site is more than two years old and has never had a formal technical review, you are almost certainly carrying issues you do not know about.

When You Probably Do Not Need One Right Now

An audit is not always the right tool. If your organic traffic is stable or growing, your core pages rank where you expect them to, and you have not made significant structural changes in the past year, a full audit may not be the highest-leverage use of budget. In that case, a narrower review — content quality, schema markup, or Core Web Vitals specifically — often addresses more than a broad sweep would.

What an Audit Can and Cannot Tell You

An audit tells you what is wrong and why. It does not fix anything on its own — implementation is a separate step, and audits that come with an agency that also sells implementation have a financial incentive to find more problems than exist. An independent audit, where the person auditing is not the one selling you a retainer, tends to produce a more honest prioritization. That is the model I use: the audit is a standalone deliverable, and what you do with it is your decision.

A Simple Self-Check Before You Decide

Pull Google Search Console and look at the Coverage report. If you see a high number of pages in the “Excluded” category — specifically “Crawled – currently not indexed” or “Discovered – currently not indexed” — that is worth investigating. Also check your Core Web Vitals report for failing URLs. If either of those surfaces problems you cannot immediately explain, an audit will almost certainly surface more.

How to Read the GSC Coverage Report

The Coverage report in Google Search Console is one of the most useful free diagnostics available, and most site owners barely look at it. Here is what the status categories actually mean for your decision:

  • Valid: Pages Google has indexed. This number should match your expected indexed page count roughly. If it is significantly lower than the number of pages on your site, pages are being excluded for a reason worth finding.
  • Crawled — currently not indexed: Googlebot visited the page but chose not to index it. This is almost always a content quality signal — thin pages, near-duplicate pages, or pages with content that does not meet Google’s indexing threshold. A high count here suggests either a content problem or a canonical issue.
  • Discovered — currently not indexed: Google knows the page exists (found it in your sitemap or via an internal link) but has not crawled it yet. This is a crawl budget and crawl frequency signal. If you have hundreds of pages in this state, Googlebot is not getting through your full site on each pass.
  • Excluded by noindex: This should match pages you have intentionally blocked. If the count is higher than expected, a plugin or CMS setting may be noindexing pages you want indexed.

Run through those four buckets before you decide whether an audit is warranted. If the numbers do not match your expectations in any category, that gap is the starting point for an audit scope conversation.

What a Migration Audit Specifically Checks

If you recently launched a redesign or moved to a new CMS, a migration audit has a specific and narrower scope than a full technical audit. The core questions are:

  • Redirect mapping: Are all old URLs returning a 301 redirect to the correct new URL? A 302 is temporary and does not pass link equity the same way. A chain of redirects — old URL to intermediate URL to new URL — bleeds equity at each hop and should be collapsed to a single direct 301.
  • Canonical reset: Did the new CMS reset or misassign canonical tags? A common pattern is the new platform setting every page’s canonical to the homepage, which tells Google to index only the homepage and treat every other page as a duplicate.
  • Sitemap resubmission: Is the new sitemap submitted in Google Search Console and does it contain only the live, canonical URLs? Sitemaps with redirect URLs or noindex pages send mixed signals.
  • Internal link integrity: Do in-content links still point to live URLs, or are they pointing to old URLs that now redirect? Each redirect hop in an internal link is a small friction cost for Googlebot crawling through your site.

These four checks can usually be completed in a few hours with Screaming Frog and Google Search Console. If any of them surface problems, a full audit is warranted. If all four come back clean, you may not need one.

If you are still uncertain, my website audit service starts with a scoping call where I can usually tell you within 15 minutes whether a full audit is warranted. You may also find it useful to review how much an SEO audit costs to understand what to expect before committing.