Built to Last, Part 4:
What does an email programme like this actually cost — and what does it return?
Budgets, freelancer workflows, and a realistic look at ROI for the St. James Jewellers email programme
A quick note before we start: St. James Jewellers & Co. is a fictional brand created purely for illustration — the name, branding, and products are entirely invented, and any resemblance to a real jeweller, living or trading, is coincidental. This series is an educational and illustrative exercise, not financial or business advice. The figures discussed later in the series are directional benchmarks rather than guarantees.
This is the post most marketing managers will skip straight to, and that's fair — strategy and design are only interesting if the numbers stack up. So let's talk numbers, with the caveat up front: every figure here is illustrative, based on current UK freelance market rates and Klaviyo's own published benchmarks, not a guaranteed outcome for any specific business.
What's being bought here?
The St. James project, in scope terms, covers: a full strategy document, eight Klaviyo flows (welcome, abandoned browse, abandoned basket, post-purchase/VIP, re-engagement, seasonal, newsletter, product launch), a dedicated six-email Valentine's campaign as the seasonal template, 34 individual email wireframes, and a design system covering typography, colour, grids, and logo lockup.
For a real business commissioning this, that's the equivalent of: one strategy/discovery phase, one design phase (templates + design system), and one Klaviyo build phase (flows, conditional logic, segmentation, testing).
Freelance market rates, as of June 2026
Email design freelancers — project-based pricing typically runs from a few hundred pounds for a single campaign up to several thousand for a full template system with a reusable component library. A project of this scope — design system plus templates across eight flows — realistically sits in the £3,000–£6,000 range as a one-off design fee, or roughly £250–£400 per day if billed by time (around 15–20 days of focused work).
Klaviyo build specialists — setting up flows, conditional logic, segmentation, and testing is often priced separately, either as part of a combined "design + build" package or as its own project. For eight flows of this complexity, budget an additional £1,500–£3,000, depending on how much of the conditional logic (VIP splits, dynamic content blocks, persona segmentation) needs custom configuration versus standard Klaviyo templates.
Put together, a realistic one-off investment for the full programme — design system, 34 templates, and eight fully-built flows — lands somewhere in the £4,500–£9,000 range. After that, ongoing work (new seasonal campaigns, newsletter content, minor tweaks) is typically billed as a smaller monthly retainer, often £400–£900/month depending on cadence.
What the workflow actually looks like
One appealing thing about a project like this is that a single freelancer can realistically own the entire creative-to-build pipeline — design and Klaviyo implementation don't have to be split between two people, which keeps both costs and coordination overhead down.
A typical division of labour looks like this:
- The freelancer handles: strategy refinement, persona and flow mapping, wireframing and design system creation, building the actual templates inside Klaviyo, setting up conditional logic and segmentation, and initial QA/testing across desktop and mobile.
- The business provides: product photography (or access to a product catalogue for the freelancer to source/commission imagery), brand assets (logo, existing brand guidelines if any), copy review and sign-off, and — critically — decisions on the few things only the business can decide, like VIP programme thresholds, seasonal calendar dates, and discount policy (or lack thereof).
- Ongoing, the business handles: day-to-day campaign scheduling, content updates for the newsletter, and seasonal asset swaps — all of which become straightforward once the design system and templates are in place.
This is a genuinely light lift for the business once the initial build is done. The heavy lifting — the strategic thinking, the 34 wireframes, the flow logic — is front-loaded into the freelancer's project phase.
The case for outsourcing this specifically
A few things make this kind of project particularly well-suited to a freelancer rather than an agency or in-house hire:
- Cost. One freelancer covering both disciplines is meaningfully cheaper than an agency retainer, and far cheaper than a full-time in-house hire for a business that doesn't yet need someone five days a week.
- Speed. A single experienced freelancer who can both design and build in Klaviyo removes the handoff delay between "designer finishes mockup" and "developer builds it" — often the single biggest source of project drag.
- Specialism. Klaviyo-specific knowledge — conditional splits, dynamic content blocks, segmentation logic — is a genuine specialism. A freelancer who does this regularly will avoid common configuration mistakes that cost time (and sometimes deliverability) to unwind later.
- Flexibility. Once the system is built, the retainer can flex up around seasonal peaks (Christmas, Valentine's) and down during quieter months — something that's much harder to do with a salaried position.
The one-off is rarely the end of the story
Most businesses approach this project as a one-off — a single design-and-build phase, then "we'll take it from here." That's a sensible starting point, and the templates and flows are built to be handed over cleanly.
In practice, though, this is usually where a second realisation sets in. The flows are live, the design system exists, but the quality of what gets sent next depends on someone maintaining it with the same care it was built with — new seasonal imagery shot and treated consistently, the newsletter written in the established tone twice a month, a product launch template populated without the spacing and hierarchy quietly drifting over time.
This is less a sales pitch for retainers and more an observation about how design systems behave in the real world: they don't maintain themselves, and the gap between "built well" and "maintained well" tends to show up gradually — a slightly inconsistent product shot here, a newsletter that starts to feel a bit more promotional than intended there. Most businesses that start with a one-off end up adding a modest ongoing retainer within the first few months, simply to protect the consistency they paid for in the first place.
Projecting the return — as a percentage of investment, not a sales count
Hypothetical sales figures only go so far in a budget conversation, not least because every business's traffic, list size, and conversion rate are different. A more useful lens is to ask: relative to the investment, what return scale is realistic for a medium-sized e-commerce business running a programme like this?
Klaviyo's own benchmark — automated flows generating roughly 30x more revenue per recipient than one-off campaigns — is a useful directional signal, but it's an average across very different businesses and shouldn't be read as a forecast for any individual brand. What it does tell us is where the return multiple tends to land once flows are mature: for a medium-sized ecommerce business with an established list and reasonable traffic, it's common to see flow-attributed revenue land somewhere in the range of 3–8x the annual cost of the programme (build plus retainer combined) within the first 12 months, with abandoned basket, post-purchase, and seasonal flows typically contributing the largest share.
That range is deliberately wide — list size, traffic volume, seasonality, and how well the brand's existing audience matches its AOV all move the number significantly, and no agency or freelancer can responsibly promise a tighter figure without first seeing the business's actual data.
Why does maths tend to favour this kind of investment anyway
One factor that doesn't get talked about enough in these conversations: it's consistently cheaper to bring an existing customer back than to acquire a new one. Paid acquisition costs are volatile and trending upward across most channels, while email — once the infrastructure exists — has a marginal cost close to zero per send.
Every flow in this programme is, in effect, a re-acquisition or retention mechanism: abandoned basket and browse flows recover people who were already close to buying, post-purchase and re-engagement flows extend the relationship with people who've already bought once, and the VIP programme rewards the customers most likely to buy again. None of these rely on new traffic or additional ad spend — they work on the audience the business already has.
That's the real argument for the investment: even at the more conservative end of the return range, the programme is working on the cheapest part of the funnel to convert, indefinitely, for a cost that — once amortised across a year of retainer plus the one-off build — tends to be a small fraction of the revenue it's positioned to influence.
The takeaway
The reality behind this conversation is: the one-off build is the easy decision, the retainer is the one that determines whether the system keeps performing the way it did on day one, and the return — while it can't be guaranteed — tends to land at a multiple of the total investment for a business of this size, working on the part of the customer base that's already cheapest to convert.
That's the whole series: a strategy built around patience rather than urgency, eight flows doing the quiet work of infrastructure, a design system that gets cheaper to use the more it's used, and a budget case that holds up even before a single hypothetical sale is counted.
Tags: email marketing ROI, Klaviyo cost, freelance email designer rates, ecommerce email budget, marketing automation ROI, outsourcing email marketing, Klaviyo freelancer, email flow revenue, CRM budget planning, ecommerce marketing investment
A note on this series: St. James Jewellers & Co. is a fictional brand, created purely for illustration — the name, branding, products, and customer base are entirely invented. The figures referenced throughout (budgets, rates, and projected returns) are based on publicly available industry benchmarks and current freelance market data; these third-party sources have not been independently verified, and their accuracy cannot be guaranteed.
This content is provided for educational and illustrative purposes only and does not constitute financial, business, or investment advice. No representation is made that any business will achieve similar results, and there is no "typical" outcome to compare against — actual performance depends on the size of the business, its existing audience, budget, and a wide range of factors that can shift over the course of a financial year. Anyone considering a similar project should seek independent advice and conduct their own due diligence before making decisions based on this content.
All flows and templates were built in a Klaviyo sandbox environment as a theoretical exercise. Anything shown here should be A/B tested before being used in a live account, and the approach can be adapted to other platforms — Mailchimp, HubSpot, and others — with the same underlying principles. This series focuses solely on the email channel; it doesn't account for social media, on-site forms, paid acquisition, or other channels that typically work alongside it as part of a broader marketing strategy. Images are free for use and are sourced from unsplash.com and pixabay.com.