Klaviyo Email Flows for Intermediate Users: Segmentation, Split Testing, and Flows That Scale Revenue

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Most ecommerce brands get a welcome series and an abandoned cart flow running within their first few weeks on Klaviyo. That is the baseline. The problem is that too many brands stop there, leaving enormous revenue on the table because their flows treat every customer identically. Top-performing brands run 10-15+ flows driving 25-45% of total revenue, while the average store limps along with three generic automations and wonders why email feels flat.

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The gap between average and excellent is not about sending more emails. It is about sending smarter ones. Conditional splits, segment-triggered flows, cart value segmentation, and proper A/B testing are the tools that close that gap. At VXTX, we build and optimise these flows daily for ecommerce clients, and the performance difference between a generic setup and a properly segmented one is consistently dramatic. This guide covers the five intermediate flows and strategies that make that difference real.

Why Your Basic Flows Are Holding You Back

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A default abandoned cart flow sends the same three emails to everyone who leaves items behind, whether the cart was worth £18 or £800. A standard welcome series delivers identical messaging to a customer who found you through TikTok and one who clicked a Google Shopping ad. That lack of context is costing you money every single day.

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The data makes the case clearly. The top 10% of abandoned cart flows achieve £28.89 revenue per recipient, compared to an average of just £3.65. That is not a marginal improvement. It is nearly an 8x difference, and segmentation is the primary driver. For brands with an AOV between £80 and £160, the average abandoned cart RPR sits at £5.60, while welcome flow RPR averages £2.67. Those numbers represent what happens without segmentation. The ceiling is far higher.

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Splitting flows by customer type, cart value, or acquisition source routinely doubles click-through rates. That is the single biggest lever most intermediate Klaviyo users have not pulled yet. As a performance marketing agency that manages email alongside paid media, we see this pattern constantly at VXTX: the brands investing in flow segmentation outperform those relying on volume every single time.

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The Foundation: Conditional Splits and Flow Suppression

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Before building intermediate flows, you need two things working properly: conditional splits and flow suppression logic.

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Conditional Splits

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A conditional split is a branching point in your flow that routes subscribers down different paths based on their data. Klaviyo lets you split on profile properties, event data, segment membership, and predictive analytics. The three highest-impact conditional splits are VIP status, first-time versus repeat buyer, and cart value. Every intermediate flow in this guide uses at least one of these.

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For example, you might split your abandoned cart flow at the first step: if the cart value is above £150, the subscriber enters a high-value path with more personalised messaging, a longer sequence, and potentially a larger incentive. If the cart value is below £30, they get a shorter, urgency-driven sequence with no discount. Same trigger, completely different experience.

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Flow Suppression Logic

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Flow suppression prevents overlapping emails and reduces unsubscribes. Without it, a customer who just received a welcome email might simultaneously receive an abandoned cart email, a browse abandonment message, and a promotional campaign, all within the same 24-hour window. That kind of frequency kills engagement and drives opt-outs.

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Set up suppression rules in Klaviyo using flow filters. Common suppression logic includes: exclude anyone who received a campaign email in the last 24 hours, exclude anyone currently active in a higher-priority flow (abandoned cart takes priority over browse abandonment, for instance), and exclude anyone who has already purchased since entering the flow. Getting suppression right is not glamorous, but it protects your list health and makes every other optimisation more effective.

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Flow 1: VIP and High-Value Customer Flow

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Your top 10% of customers behave differently from everyone else, and they should receive different emails. A VIP flow triggers based on a conditional split by total spend or order count and routes your most valuable buyers into a dedicated experience.

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How to Build It

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Create a segment in Klaviyo for customers who have placed three or more orders, or whose total spend exceeds a threshold meaningful to your brand (for many of our clients at VXTX, that is £300-£500 lifetime spend). Use this segment as the trigger or as a conditional split within your post-purchase flow.

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The VIP path should include: early access to new product launches, exclusive discount codes that regular customers do not receive, personal thank-you messaging from the founder or brand, and invitations to loyalty programmes or referral incentives. The tone shifts from transactional to relational. These customers already trust you. Your job is to deepen that trust and increase their lifetime value.

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Klaviyo's predicted CLV metric is especially useful here. Rather than waiting for a customer to hit a spend threshold, you can split on predicted future value and start treating high-potential buyers as VIPs before they fully mature. This is the kind of proactive segmentation that separates the best performance marketing agency setups from DIY configurations.

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Flow 2: Abandoned Cart Split by Cart Value

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This is the single highest-impact change most brands can make to their existing abandoned cart flow. Instead of one generic sequence, you build two or three paths based on the value of the cart.

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The Split Logic

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At VXTX, we typically recommend three tiers for brands with an AOV in the £80-£160 range:

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• Low value (under £40): Two emails. Short, direct, urgency-focused. No discount. These carts are often impulse purchases, and a simple reminder is usually enough to convert. Adding a discount here trains low-value buyers to expect one every time.
• Mid value (£40-£150): Three emails. Social proof heavy, with customer reviews and UGC. A small incentive (free shipping or 5% off) in email three if they have not converted.
• High value (£150+): Four emails over five to seven days. Personalised product benefits, detailed FAQ content addressing common objections, and a meaningful incentive (10-15% off or a gift with purchase) in the final email. These carts justify more effort because the revenue at stake is significantly higher.

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The numbers back this approach. When you tailor messaging and incentives to cart value, you stop giving away margin on low-value carts and start converting more high-value ones. That is how the top 10% of abandoned cart flows reach £28.89 RPR while the average stays at £3.65.

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Flow 3: Replenishment and Reorder Flow

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If you sell consumable products, supplements, skincare, pet food, coffee, or anything with a predictable usage cycle, a replenishment flow should be one of your top revenue generators. The concept is straightforward: email the customer when they are likely running low, timed to their specific product's consumption cycle.

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Setting the Timing

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Trigger the flow from a fulfilled order event, then add a time delay matched to the product's average consumption period. A 30-day supply of vitamins gets a reorder email on day 23-25. A bag of premium coffee that lasts two weeks gets one on day 11-12. The goal is to land in the inbox just before they run out, not after they have already reordered elsewhere.

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For brands with multiple product categories, use conditional splits based on the product purchased. A customer who bought a moisturiser (60-day supply) should receive a different reorder cadence than one who bought a cleanser (30-day supply). Product-specific triggers are essential. A generic "buy again" email sent at the wrong time feels irrelevant, while a perfectly timed one feels genuinely helpful.

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Combine this with Klaviyo's churn risk predictions to add urgency for customers showing signs of lapsing. If predicted churn risk is high and the reorder window has passed, escalate with a stronger incentive or a personal outreach email.

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Flow 4: Post-Purchase Cross-Sell Flow

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A cross-sell flow sends product recommendations after a purchase, based on what the customer actually bought. This is different from a generic "you might also like" campaign because the recommendations are contextual and timely.

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Building Effective Cross-Sell Logic

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Start by mapping your product catalogue into logical pairings. If someone buys a camera, recommend a lens, a memory card, or a camera bag. If someone buys a protein powder, suggest a shaker bottle or a sample pack of a complementary flavour. The more specific the pairing, the higher the conversion rate.

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In Klaviyo, trigger the flow from a fulfilled order event (not placed order, because you want the customer to have received the product first). Add a time delay of 7-14 days, giving them time to use and appreciate their purchase before you ask for another sale. Then use conditional splits based on the product purchased to route them to the relevant recommendation path.

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Add a conditional split for first-time versus repeat buyers. A first-time buyer needs more brand trust-building in the cross-sell email (reviews, guarantees, brand story), while a repeat buyer can go straight to the product recommendation with minimal preamble. This small split consistently improves conversion rates because the buying psychology is fundamentally different.

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Flow 5: A/B Testing Your Flows Properly

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Most brands either do not test their flows at all, or they test the wrong things. Subject line tests are fine as a starting point, but the real gains come from structural tests that change the flow itself.

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What to Test

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• Subject lines: The baseline test. Run it first, get your winner, and move on to bigger levers.
• Send timing: Does your abandoned cart flow convert better when email one sends at 1 hour or 4 hours after abandonment? Test it. The difference can be substantial.
• Number of emails: Is a 3-email abandoned cart sequence outperforming a 5-email one? More is not always better. Test 3 versus 4, then test the winner against 5.
• Discount versus no discount: This is the test most brands are afraid to run, and it is usually the most revealing. We regularly find at VXTX that removing the discount from email one and only offering it in email three (to non-converters) maintains conversion rates while protecting margin.
• Content format: Plain text versus designed HTML. For some audiences, a simple text email from the founder outperforms a polished template. You will not know until you test it.

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Testing Discipline

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Klaviyo's built-in A/B testing for flows lets you split traffic at any point. The rules are simple: test one variable at a time, let tests run until you reach statistical significance (Klaviyo will flag this), and document every result. Too many brands run a test for three days, pick a winner based on 40 opens, and call it done. That is not testing. That is guessing.

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At VXTX, we maintain a testing calendar for every client's Klaviyo account. Each flow gets tested on a rolling basis, with one active test per flow at any given time. Over six months, this compounds into significant revenue gains because every element has been validated by data rather than assumption.

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Segment-Triggered Flows and Predictive Analytics

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Beyond the five core flows above, intermediate users should explore segment-triggered flows. These are flows that activate when a profile enters or exits a specific segment, rather than triggering from a single event.

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Practical examples include: a winback flow that triggers when a customer enters your "at risk of churning" segment (built using Klaviyo's predicted churn risk), a VIP welcome flow that triggers when a customer's predicted CLV crosses a threshold, or a re-engagement flow that fires when someone enters a "has not opened in 60 days" segment.

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Klaviyo's predictive analytics, including predicted CLV, predicted next order date, and churn risk scoring, give you the raw material for these segments. The brands leveraging these tools are building flows that respond to customer behaviour in real time, not just reacting to a single abandoned cart or purchase event. That level of sophistication is what drives the 25-45% revenue contribution that top performers achieve.

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What This Looks Like in Practice: The VXTX Approach

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"Once the basics are live, the real gains come from segmentation. We split every flow by customer value at VXTX, and the performance gap between a generic abandoned cart email and one tailored to a £500 cart is enormous. That is where the money is."

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That philosophy shapes how we build every Klaviyo account we manage. The typical VXTX client setup includes 12-15 active flows, each with multiple conditional splits, suppression rules preventing overlap, and at least one active A/B test running at all times. We pair this with the paid media strategy, ensuring that acquisition source data flows into Klaviyo segments so that email messaging aligns with how the customer first discovered the brand.

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This integrated approach is why ecommerce brands working with a dedicated performance marketing agency on both paid and email consistently outperform those treating each channel in isolation.

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The Bottom Line

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If your Klaviyo account has a welcome series, an abandoned cart flow, and not much else, you are leaving money on the table. The five flows and strategies outlined here, VIP segmentation, cart value splits, replenishment timing, contextual cross-sells, and disciplined A/B testing, are what separate brands generating 10% of revenue from email from those generating 40%+.

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The work is not complicated. It is methodical. Each conditional split you add, each test you run, and each suppression rule you implement compounds over time into a meaningfully better performing email programme. The brands that commit to this level of detail are the ones that scale.

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If your flows are stuck at basic and you want to see what a properly segmented Klaviyo setup looks like, get in touch with VXTX. We will audit your account, identify the biggest gaps, and show you exactly where the revenue is hiding. No pitch. Just data.