"SEO" on an invoice can mean almost anything. Two agencies charging the same amount can be doing entirely different work, and most proposals describe activity rather than deliverables — "ongoing optimisation", "content strategy", "authority building" — which are categories, not things you receive.
This covers what should actually be in the package, how to tell activity from deliverables, and how long to commit before you are entitled to a verdict. We've dealt with what it costs separately in how much you should pay for SEO services; this is about what the fee buys.
The Six Things an SEO Retainer Should Contain
Almost all legitimate SEO work falls into six buckets. A retainer need not include all of them — but you should know which ones you are paying for and which you are not.
Technical. Whether search engines can crawl, render, index and prefer your pages. Crawl errors, indexation, site architecture, Core Web Vitals, structured data, and the redirect work around any site change. This is the foundation, and work in the other five buckets underperforms if it is broken.
On-page. Titles, meta descriptions, heading structure, internal linking, and aligning each page with what someone searching that term actually wants.
Content. New pages and improvements to existing ones. The biggest variable in any retainer and the one most often described vaguely.
Off-page. Earning references from other sites — genuine outreach, digital PR, being cited. The slowest and most frequently misrepresented.
Local. Google Business Profile, citations, reviews, location pages. Essential if customers search with a place name, irrelevant if they do not.
Measurement. Analytics and Search Console configured properly, conversion tracking that works, and reporting that shows outcomes rather than activity. Frequently missing, which conveniently makes the rest unfalsifiable.
Deliverables vs Activity
This is the distinction that makes a proposal readable.
Activity sounds like: ongoing technical optimisation, content strategy, link building, monthly reporting and analysis.
Deliverables sound like: a full crawl each month with errors fixed inside the same reporting period; two new pages published to an agreed brief; four existing pages updated; internal links added to three priority pages; a monthly report showing enquiries by channel against baseline.
The second version can be checked. The first cannot, which is precisely why it is more common.
Ask any prospective agency to convert their proposal into deliverables with numbers and timescales. A good agency does it readily, because they already work that way. A vague agency resists, usually by explaining that SEO is too fluid to commit to specifics — which is true of the results and not of the work.
What Should Be Fixed and What Should Flex
Not everything can be pinned down, and a retainer that promises identical output every month is its own kind of warning sign — it suggests a production line rather than a strategy.
Reasonably fixed: the number of content pieces, the technical crawl cadence, reporting frequency and format, and how much senior time you get.
Reasonably flexible: which pages get worked on, which keywords are prioritised, and the balance between content and technical work. If month two's crawl finds something serious, you want them to fix it rather than publish a blog post because the contract says two per month.
The way to have both is a fixed volume of work with a flexible allocation, agreed monthly. You know what you are getting; they can direct it at whatever currently matters most.
What Is Usually Not Included
Worth checking, because these assumptions cause most retainer disputes.
Development time. Many agencies hand over technical recommendations for your developers to implement. If you have no development capacity, a retainer of recommendations achieves nothing. Ask explicitly whether they implement or advise.
Paid advertising. Separate discipline, separate budget, and the ad spend itself is never included in a management fee.
Website design or rebuilds. Usually scoped separately, and should be.
Content you sign off. Some retainers include writing; others include briefs and expect you to write. Enormous difference in your workload.
Reactive work. If Google releases an update or your site breaks, is diagnosing it inside the retainer or extra?
How Long Before You Can Judge It?
The honest answer has three stages, and knowing them prevents both premature cancellation and indefinite patience.
Months one to three: foundations, little visible. Diagnosis, technical fixes, the first content. You should see index coverage improve, impressions begin to move, and rankings appear for terms you did not previously register for. You should not expect meaningful enquiry growth, and any agency promising it is managing your expectations badly.
Months four to eight: the honest test. This is where you find out. Rankings on target terms should be moving, organic traffic rising, and the first enquiries attributable to work done in month two. If nothing has moved by month six on a site with no fundamental problems, something is wrong — the strategy, the execution, or the market's competitiveness.
Months nine to twelve: compounding or not. Good campaigns accelerate here, because earlier work has matured and authority has accumulated. If month twelve looks like month six, stop.
Twelve months is a fair minimum for a verdict on a competitive market, and six is fair where competition is light. Below three months you are paying for setup and cancelling before the work exists. Our fuller treatment is in how long SEO takes.
Do You Ever Stop Paying?
Yes, and agencies rarely volunteer it.
The cases for stopping or reducing: you have reached the position you wanted on the terms that matter and maintenance is cheaper than growth; your market is small enough that you have captured the available demand; the remaining opportunities are worth less than the retainer; or you have built enough internal capability to maintain it.
Most businesses do not need to stop entirely but can shift from a growth retainer to a lighter maintenance arrangement — monitoring, periodic content refreshes, technical watch on releases. Considerably cheaper, and it protects what you built.
The thing to be wary of is paying growth rates indefinitely for maintenance work. If the deliverables have quietly shrunk while the invoice has not, that is the conversation to have. And if you are being asked to justify the spend internally, building the business case covers how to frame it.
The One Inclusion to Insist On
If you take one thing from this: insist on measurement being part of the package, with a baseline recorded in writing before work begins.
Current organic sessions, current enquiries from organic, current rankings for the agreed terms, dated. Without it, every later conversation about whether SEO is working becomes an argument about memory. With it, the question answers itself. Our piece on how SEO agencies measure success covers what defensible reporting looks like.
If you want to see what a defined-deliverables retainer looks like in practice, that is how our SEO services are structured — the monthly deliverables are agreed before anything starts.
Frequently Asked Questions
What is included in SEO when you pay for it?
Legitimate SEO work falls into six areas: technical, on-page, content, off-page, local, and measurement. A retainer need not include all six, but you should know which you are buying. Insist on deliverables with numbers and timescales rather than categories like "ongoing optimisation".
What is the difference between SEO deliverables and activity?
Activity is "ongoing technical optimisation and content strategy". A deliverable is "a full crawl monthly with errors fixed in the same reporting period, two new pages to an agreed brief, four pages updated". Deliverables can be checked at the end of the month; activity cannot.
How long should you pay for SEO before expecting results?
Months one to three build foundations with little visible change. Months four to eight are the honest test, where rankings and traffic should be moving. Months nine to twelve should compound. Twelve months is fair for a competitive market, six where competition is light.
What is usually not included in an SEO retainer?
Development time to implement technical fixes, paid advertising, website design, and sometimes the content writing itself — some retainers deliver briefs and expect you to write. Also check whether reactive work after an algorithm update or a site breakage is included or charged extra.
Should you ever stop paying for SEO?
Most businesses shift rather than stop — moving from a growth retainer to lighter maintenance once they hold the positions that matter. What to avoid is paying growth rates for maintenance work, which happens when deliverables shrink but the invoice does not.