Most agencies know that bigger engagements tend to produce better long-term outcomes. What’s less obvious is why—and more importantly, what structural decisions actually move the needle to increase client lifetime value (LTV).
In partnership with Promethean Research, a firm specializing in performance benchmarking for digital agencies, we surveyed 165 high-performing agencies across the web services industry to understand what actually drives long-term client value. When it comes to engagement size, increasing LTV isn’t just a matter of winning larger projects. It’s about how agencies design the scope and sequence of their work from the start.
This post is part of a series exploring 12 key levers that influence LTV for agencies and MSPs. Here, we look at engagement sizes and two structural decisions that are closely linked to where your agency lands on that spectrum.
What does the average agency engagement actually look like?
The research revealed a clear split in the market: most agencies typically handle either smaller projects (under $20,000) or larger ones (over $50,000), with relatively few operating in the middle.
Retainer sizes follow a more normal distribution. The most common range is $1,000-$5,000 per month, where 31% of average retainers fall—a range that reflects the reality of most agency-client relationships. Only at the higher end does it taper off, with just 9% of agencies operating at $20,000 or more per month, likely those managing a broader scope of ongoing responsibilities for their clients.
But what’s more important than where agencies land is what drives those numbers. Engagement size is rarely accidental. It tends to reflect deliberate decisions about the scope of work agencies take on and how they structure it over time.
What separates different engagement sizes
A $900/month client and a $4,000/month client don’t just represent different price points. They typically represent different definitions of what the agency is responsible for.
At lower engagement sizes, the agency is usually accountable for a defined, contained set of deliverables, which are often more immediately tangible. When they’re completed, the engagement is done, and even when it rolls into a retainer, it tends to be smaller in scope. Switching costs are low, not because the work wasn’t good, but because the work was finite.
At higher engagement sizes, the agency tends to be accountable for outcomes across a broader surface area. More systems are involved. More of the client’s business depends on the agency showing up consistently. That depth is also what makes these retainers stickier—the relationship becomes harder to unwind, not because the client is locked in, but because the agency is genuinely load-bearing.
The more useful question for agencies looking to grow isn’t “how do we charge more?” but “how do we design engagements that grow our role and increase the value we create for clients?”
Two things agencies that grow retainers do differently
1. Expand the scope of responsibility, not just the deliverables
There’s a meaningful difference between adding more line items to a proposal and taking on a broader category of responsibility. Agencies that grow LTV tend to take ownership of adjacent areas that are genuinely critical to the client’s digital operations. Often, these are things that require ongoing attention, carry real consequences if neglected, and may be something clients don’t want to manage themselves.
The key is that the expansion has to be a natural fit. Taking on broader responsibility only raises LTV if the agency can actually deliver on it and if the client understands the value of having it managed in one place.
Take domain management, for example. Most clients know it needs to be managed, but few want to be the ones managing it. Renewals, DNS configuration, access controls, and security oversight don’t go away once a site launches. They require informed attention over time. For an agency already managing their clients’ digital presence, domains are a natural extension of responsibility that deepens the relationship without dramatically expanding operational lift.
2. Start with the full picture, not just the first project
For agencies looking to grow engagement sizes, one of the most practical shifts is planning beyond the work at hand. Designing phases rather than standalone projects.
It’s about being honest with clients from the start, not just about what’s in scope today, but what they’re likely to need over time. A website rebuild isn’t the end of the story. There’s performance optimization, content iteration, domain management, security, and infrastructure that all need consistent attention long after launch. Agencies that surface those realities early, and plan for them deliberately, change how clients think about the relationship before the work even begins.
The practical effect is significant. When phase 2 and phase 3 are part of the initial conversation, there’s always a next step on the horizon. The client is focused on what comes next rather than whether to continue at all. That continuity tends to be one of the stronger drivers of higher retainer sizes over time.
This approach works best when the roadmap is grounded in the client’s actual goals, not the agency’s revenue targets. Clients can tell the difference. When they feel like they’re being guided toward outcomes they care about, they’re more likely to stay.
Where domain management fits in
Both of the above approaches are about taking on more of what clients need managed, and domain management is one of the clearest places to start. It’s ongoing, and the stakes are higher than most clients realize. And when things go wrong, they go wrong fast. A single misstep like an expired domain, a missed renewal, or a lapse in DNS configuration can ripple across everything they have online. No one wants to leave it to chance, and many clients would rather not manage it themselves.
For agencies that manage a client’s hosting or website but haven’t extended their services to include domains, there’s an operational gap. When it comes time to launch a website, troubleshoot a DNS issue, or reclaim a domain that’s accidentally expired, the agency team is left chasing down registrar login credentials that may be out of date, shared across multiple people, or simply nowhere to be found.
Adding domain registration and management through OpenSRS Storefront is a low-friction addition to your stack. You can deliver it through your own white-labelled, client-facing experience with no domain specialists required and no new infrastructure to manage.
Final thoughts
Engagement size tends to follow the decisions made long before a proposal is signed. How broadly an agency defines its responsibility, and how honestly it maps out what a client will need over time, often shapes the nature of the relationship that follows.
Neither of the approaches covered here requires a dramatic shift in how an agency operates. They require a shift in how engagements are framed—from a finite list of deliverables, to intentional, multi-phase projects that encourage an ongoing retainer. That distinction, made consistently, can move the needle on LTV over time.
Frequently asked questions (FAQs)
Larger engagements typically reflect a broader scope of responsibility rather than just more deliverables. When an agency is accountable for more of a client’s critical operations, the relationship becomes more valuable to maintain over time, which naturally supports longer client tenure and higher lifetime value.
The most common retainer range is $1,000-$5,000 per month—that’s where 31% of agency retainers land. Retainer sizes below $1,000 per month and above $20,000 per month are both less common, each representing smaller segments of the market.
Project budgets vary widely across the market. Roughly 23% of agencies typically handle projects under $5,000 and another 21% commonly handle projects over $100,000, with the middle of the market, projects between $20,000 and $50,000, being the thinnest, where only 12% of agencies operate.
Expanding deliverables means adding more line items to a proposal, while expanding responsibility means taking genuine ownership of areas that require ongoing attention and carry real consequences if neglected. The latter changes the nature of the relationship and has a more meaningful impact on LTV, as it shifts how clients perceive the value of staying.
Domain management is ongoing, high-stakes, and something most clients would rather not handle themselves. For an agency already managing a client’s hosting or website, adding domain management is a natural extension of existing responsibility—one that deepens the relationship without dramatically expanding operational lift.
Phased planning gives the relationship a natural next step rather than a clear end date. When future phases are part of the initial conversation, the client is focused on what comes next rather than whether or not to continue at all, which supports longer relationships and reduces the likelihood of the engagement ending after a single project.