If you are still working out what GEO is and how it differs from SEO, start with GEO vs SEO: what's the difference and do you need both? This piece assumes you know, and goes straight to the money.
TL;DR
SEO and GEO are not rivals. They are two layers of the same visibility problem, and in 2026 most UK businesses need both. SEO earns you ranked pages in Google's classic results; GEO (generative engine optimisation) earns you citations inside the answers assembled by ChatGPT, Google AI Overviews, Perplexity and Claude. The practical question is not "which one" but "what split". For an established site, a reasonable starting point is to keep most of the effort on the SEO foundation that GEO depends on, and set aside a defined minority of budget for the GEO-specific work: entity declaration, structured data, knowledge-graph presence and AI-crawler access. If you have no working technical foundation, fund that first. GEO built on a broken site is money lost.
Why this is now a real budget question
For years, "search marketing budget" meant one thing: SEO. You paid for content, links and technical fixes so that Google ranked your pages. That job has not gone away. What has changed is that some of the people looking for what you sell now read an answer an AI engine assembled for them instead of a list of ten links, and that answer names a handful of businesses. If you are not one of them, you were not in the room, however well your page ranks underneath.
So there are now two surfaces to buy for: the ranked page and the assembled answer. They overlap, but the work that wins each is not identical. That is what makes it a budget decision. Put everything into classic SEO and you leave the answer surface uncontested. Put everything into "GEO" on a site with no foundation and you are paying for a roof with no walls.
The one thing that makes the split easy: GEO sits on top of SEO
GEO is not a replacement for SEO. It is a layer that depends on it. AI engines do not crawl a separate internet. They read the same web your SEO already serves, and they lean on the same signals: crawlable pages, clean structure, accurate content and authoritative sources that reference you. On top of that shared foundation, GEO adds moves that classic SEO never prioritised:
- Entity declaration: telling engines who you are as one structured entity (a clean Organization node), not just serving keyword-relevant pages.
- Knowledge-graph presence: existing as a resolvable entity in sources such as Wikidata, which engines use to tell similar names apart.
- Answer-shaped content: question-shaped headings, direct summaries and FAQs, so a machine can lift a clean, quotable answer.
- AI-crawler access: checking that your robots.txt lets in the crawlers that fetch pages for live answers, such as OAI-SearchBot, PerplexityBot and Claude-SearchBot. Some sites block them without meaning to. (OpenAI documents its crawlers here.)
Because GEO builds on the SEO foundation, the budget logic follows: fix and maintain the foundation first, then fund the layer on top. You do not fund the layer instead of the foundation. And once the foundation is solid, much of the GEO-specific work is a defined job rather than a treadmill.
A framework for the split
There is no single correct percentage, because the right split depends on where your site is today. Rather than quote a number that will be wrong for half of readers, work through three questions in order.
1. Do you have a working technical foundation? Crawlable pages, valid structured data, correct canonicals and redirects, a clean site structure, and content that is accurate and reasonably current. If not, this is where the money goes first, for both SEO and GEO. Neither surface rewards a broken site. Do not buy GEO as a bolt-on until this is true.
2. Is your foundation solid but your AI-answer presence weak? This is a common position for established small businesses: they rank acceptably in classic search but are missing from AI-assembled answers, and sometimes the engines confuse them with a similarly named business. If that is you, the highest-return spend is the GEO-specific layer, because it is the work you have not yet done. The foundation is already paid for; you are funding the missing layer, not rebuilding the base.
3. Are you contesting a competitive commercial term? Some queries are competitive on both surfaces, and there you invest continuously in both, because your competitors are. Few small businesses have many of these, so reserve this tier of spend for the handful of terms that actually move revenue.
The pattern across all three: money follows the weakest load-bearing layer. No foundation: fund the foundation. Foundation but no answer presence: fund the GEO layer. A revenue-critical contested term: fund both continuously. That is why a flat "spend 70/30 on SEO and GEO" instruction is unhelpful. It ignores which layer is actually costing you visibility.
What GEO-specific work actually costs you
A useful way to sanity-check any GEO quote is to remember that much of the highest-return GEO work is one-off structural work, not an open-ended retainer. Declaring a clean entity, populating a knowledge-graph record, fixing schema and canonicals, and opening crawler access are largely fix-once jobs whose benefit carries forward: once your entity is declared and resolvable, every future page inherits the clarity. That is a different shape from the classic-SEO cycle of producing content and earning links to hold a ranking.
It changes the shape of the spend. Classic SEO tends to be an ongoing monthly cost. Foundational GEO is usually front-loaded structural work followed by lighter maintenance and monitoring. Understand that and you can avoid being sold a large recurring "GEO retainer" for work that is mostly a defined project, and instead fund the structural work once, then pay for monitoring and answer-shaped content at a lower run rate.
The test for any recurring GEO fee is short: ask what in it is genuinely ongoing. Monitoring is. Engines change how they retrieve and describe businesses without notice, and you want to know the month your entity stops resolving cleanly or your citations thin out. Implementation mostly is not; it is a defined body of work that finishes. If one monthly figure bundles the two without saying so, you may be paying a delivery rate for a measurement service, and you will not be able to tell, because the invoice will not say.
We publish ours as two separate retainers for that reason. GEO Monitoring is £950 a month +VAT and is measurement and audit only: it tells you what is happening and what to do about it, and it does not do the work. GEO Authority is £1,500 a month +VAT and includes the implementation. You do not need to buy either to use the test on whoever you are talking to. If you are weighing up several agencies, our guide to comparing GEO agencies applies the same scepticism to the whole proposal.
How to know if it is working
Whatever split you choose, measure both surfaces, because they fail differently. For SEO, the classic signals still apply: rankings, impressions and clicks in Google Search Console. For GEO, measurement is newer and more manual: you periodically ask the major AI engines about your business and your category, and record whether you are named, correctly, and in what company. Our GEO Self-Audit walks through that check in about twenty minutes. If your SEO numbers are healthy but you are never named in AI answers, shift spend toward the GEO layer. If you are named but the details are wrong, that is an entity problem, not a content-volume problem, and the fix is structural, not more blog posts.
The honest bottom line
In 2026, "SEO vs GEO" is the wrong framing. It is SEO and GEO, in a proportion set by which layer is currently costing you visibility. For most businesses with a working site, the shift is not to abandon SEO. It is to stop treating the AI-answer surface as someone else's problem, and to fund the specific, largely one-off structural work that makes an engine confident enough to name you. Spend on the weakest load-bearing layer first, measure both surfaces, and be sceptical of anyone selling a large recurring fee for work that is mostly a defined project.
If you would like a second pair of eyes on where your weakest layer is, that is where our GEO optimisation work starts. Run the self-audit first, then book a discovery call and bring what you found.
FAQ
Do I still need SEO in 2026, or has GEO replaced it?
You still need SEO. GEO does not replace it; it builds on it. AI engines read the same crawlable, well-structured web that SEO produces, and they lean on the same foundation of accurate pages and authoritative references. Abandoning SEO to "do GEO" removes the ground GEO stands on.
How much should I budget for GEO versus SEO?
There is no universal percentage. The right split depends on your weakest load-bearing layer: if your site's technical foundation is broken, fund that first; if your foundation is solid but you are absent from AI answers, fund the GEO-specific layer; if you are contesting a revenue-critical competitive term, fund both continuously. Money follows the layer that is currently costing you visibility.
Is GEO a monthly retainer or a one-off project?
Much of the highest-return GEO work (entity declaration, knowledge-graph presence, schema and canonical fixes, crawler access) is one-off structural work that compounds. Ongoing GEO is lighter: monitoring your AI-answer presence and producing answer-shaped content. Where a retainer is the right shape, it should say whether delivery is included. Ours are published separately: GEO Monitoring at £950 a month +VAT (measurement, reporting and recommendations, no implementation) and GEO Authority at £1,500 a month +VAT (the same monitoring plus the implementation).
What happens if I only invest in SEO and ignore GEO?
You may rank well in classic search while being absent from the AI-assembled answers some people now read instead of a results list. The risk is not that your SEO stops working. It is that part of your audience never reaches the ranked list.
Can I do the GEO-specific work myself?
Some of it, yes, the same way you can audit your own AI visibility. Confirming your entity declaration, checking your Wikidata presence and verifying crawler access are things a technical owner can inspect. Populating a knowledge-graph record correctly and implementing clean multi-type schema are where most businesses bring in help, because errors there actively confuse engines rather than simply doing nothing.
How do I measure whether my GEO spend is working?
Measure both surfaces separately. For SEO, use Search Console rankings, impressions and clicks. For GEO, periodically ask the major AI engines about your business and category and record whether you are named, correctly, and alongside whom. Healthy SEO numbers but no AI-answer presence is the signal to shift spend toward the GEO layer.