Package the tiers around client size and traffic, not around a menu of features, because the right monthly capacity depends on how much room a site has to grow and how much traffic exists to test against [1]. Published agency menus tend to cluster into three or four bands, from entry retainers of about $2,000 to $6,000 a month up to full-service programs above $14,000, and the job is matching a client to the band where the hours can actually move their metric [1][6]. Three tiers cover most of the market.
Small sites: a single flat retainer
Small sites are best served by one flat monthly retainer, usually in the $2,500 to $3,500 range on a six-month term that covers strategy, launchpad, and continuous improvement together [1]. At this size there is rarely enough traffic to run meaningful split tests, so the value comes from getting the messaging and core pages right and improving them steadily rather than from high-volume experimentation. Keep the package simple and the reporting focused on one or two metrics, because a small client feels every dollar and needs to see the line move quickly to renew.
Mid-market sites: split the strategy and launchpad from the retainer
Mid-market clients, the ones who would otherwise spend $25,000 to $120,000 on a traditional redesign [2], respond well to a two-part structure: price strategy and the launchpad as a defined project of roughly $15,000 to $20,000, then move to about $3,000 a month of continuous improvement once the site is live [1]. This mirrors how these buyers already think about budgets, giving them a concrete upfront deliverable to approve while still committing them to the ongoing work where most of the compounding gains come from [3]. The launchpad ships in four to eight weeks on the five to ten pages that carry most of the traffic, so the client sees a finished, better-performing site fast, then funds improvement from the results it produces [6].
Enterprise sites: price each phase, and plan for the handoff risk
Enterprise engagements are usually priced phase by phase, with strategy, launchpad, and continuous improvement quoted and approved separately, because procurement and legal review make a single blanket retainer hard to sign [1]. The upside is larger individual phases and clearer internal approvals, and the cost is that every phase boundary becomes its own sales cycle, so a client can walk after the launchpad with a new site and no continuous-improvement contract behind it [1]. The countermeasure is to sell continuous improvement as the point of the whole exercise from the first conversation, not as an optional add-on quoted after the build.