Why More Klaviyo Segments Don't Always Mean More Revenue

Most eCom brands I see have too many Klaviyo segments.

They believe more segments equal more personalisation, which should equal more revenue. It’s a logical assumption. It’s also wrong. In the last year, we audited over 100 Klaviyo accounts. The ones with 50+ complex segments were almost never the ones with the highest email-attributed revenue.

The truth is that over-segmentation creates complexity without adding value. It paralyses your team, dilutes your message, and hides the real opportunities for growth. The goal isn’t to have the most segments. It’s to have the right ones.

The hidden costs of excessive Klaviyo segmentation

I’ve been there. When I was scaling my own eCommerce brand, Gearbunch, the temptation to create a new segment for every little idea was strong. A segment for people who bought blue leggings. A segment for people who clicked on a specific link three months ago. A segment for customers in a particular postcode.

Before I knew it, we had dozens of them. Each one needed a slightly different campaign angle. Each one needed to be checked and updated. It felt like we were being hyper-targeted, but the numbers told a different story. Our campaign revenue was flat, but the time we spent managing email was going up.

This is the trap of over-segmentation. It creates three big problems.

First, analysis paralysis. When you have 75 different segments, figuring out which ones are actually working is a nightmare. Your reporting becomes a mess of tiny data points that don’t give you a clear picture of what’s driving performance. You spend more time managing the structure than analysing the results.

Second, message dilution. Your core message gets lost. Instead of sending a powerful, clear promotion to a large, engaged audience, you send 15 slightly different, weaker versions to fragmented micro-audiences. This inconsistency confuses customers and weakens your brand voice.

Finally, there’s the operational overhead. Every extra segment is another thing to maintain. It’s more work for your team for very little return. We’ve seen brands where the marketing manager spends a full day setting up a single campaign send across 20+ segments, all for a lift of 0.1% in conversion rate. That time is better spent on strategy, creative, or optimising your core flows. Effective Klaviyo management is about ruthless prioritisation, not endless complication.

Finding your Klaviyo segmentation sweet spot

So if 75 segments is too many, what’s the right number?

There isn’t a magic number, but I can give you a rule of thumb. Most eCommerce brands making $1M to $10M a year can run their entire email marketing program with 10-15 core segments. Some of our most successful clients run on fewer than 10.

The key is to apply the 80/20 rule. Identify the 20% of your customer groups that drive 80% of your revenue and focus your energy there. You need to stop chasing edge cases and start optimising for your most valuable cohorts.

Your segmentation should be built on a foundation of meaningful differences in customer behaviour, not trivial details. The best place to start is with lifecycle stages and purchase behaviour. Are they a new subscriber, a one-time buyer, a VIP, or a lapsed customer? These distinctions actually change how you should speak to them.

To find your sweet spot, you need to monitor the health of each segment. Look at these three metrics for every segment you use: 1. Size: Is the segment large enough to be statistically significant? Sending a campaign to 50 people tells you nothing. I generally look for a minimum of 1,000 profiles. 2. Engagement: Are they opening and clicking? A healthy engaged segment should have open rates north of 30% and click rates over 2%. 3. Conversion: Are they actually buying? If a segment hasn’t generated a single sale in 90 days, it’s probably not a segment worth keeping.

If you aren’t sure where to begin, a free Klaviyo audit can quickly identify which segments are working and which are just creating noise.

Leveraging RFM segmentation for core groups

If you want a powerful, data-driven foundation for your segments, use RFM. It stands for Recency, Frequency, and Monetary value. Klaviyo can calculate this for you automatically. It groups your customers based on three simple questions: - How recently did they buy? (Recency) - How often do they buy? (Frequency) - How much do they spend? (Monetary)

Using RFM, you can create a handful of incredibly powerful segments like “Champions” (your best customers), “Loyal Customers” (buy often, but spend less), “At-Risk Customers” (haven’t bought in a while), and “Lost Customers”. This is far more effective than segmenting by what colour T-shirt someone bought last year.

Consolidating underperforming email segments for efficiency

Once you commit to a leaner strategy, the next step is to clean up your account. I recommend doing a segment audit every quarter.

Go through your segment list in Klaviyo and be ruthless. For each one, ask: - Has this segment been used in a campaign in the last 90 days? - Does it have more than 1,000 members? - Did the last campaign sent to it have a click rate above 1.5%? - Did it generate a positive ROI?

If the answer to two or more of these is “no”, that segment is a candidate for consolidation.

The process is straightforward. Let’s say you have three separate segments: “Bought Product X,” “Bought Product Y,” and “Bought Product Z.” All three are in the same category, and all three segments are small and have low engagement. Merge them into a single, larger segment called “Category A Purchasers.”

You haven’t lost the ability to personalise. You can still use dynamic content blocks in your emails to show them products related to their specific purchase. But now, you’re managing one segment instead of three.

The benefits are immediate. Your reporting becomes clearer. Your campaign setup time is cut dramatically. Most importantly, it frees up your team’s time to focus on high-impact work, like improving your core email flows. We’ve seen this simple cleanup process reduce our clients’ campaign management time by up to 50%, letting us focus on strategy that improves our results.

Merging versus creating new Klaviyo segments

A lean segmentation strategy doesn’t mean you never create new segments. It means you’re intentional about it. You should have a clear, data-driven reason for every segment that exists in your account.

Here’s the framework we use at Elite Brands to decide whether to merge or create.

You should create a new segment when you have a distinct audience with a unique messaging need. For example: - You launch a new product line that appeals to a completely different customer avatar. - You expand into a new country with different pricing, language, or cultural context. - You identify a new, high-value behaviour, like customers who have purchased 3 or more times in their first 90 days.

You should merge existing segments when: - There is a high degree of overlap between them (e.g., 70% of people in segment A are also in segment B). - Their engagement and conversion behaviour are nearly identical. - You find yourself sending them the exact same campaigns and messaging.

Before making any permanent change, test it. Create your proposed new, merged segment. For your next two campaigns, A/B test the new consolidated segment against your old, fragmented ones. Klaviyo’s A/B testing tools make this easy to set up. Let the data tell you if the simplification hurts performance. In over 90% of the tests we’ve run for clients, the simpler, merged segment performs just as well or better.

This disciplined approach is central to our process. It keeps your Klaviyo account clean, organised, and focused on what actually generates revenue.

Prioritising high-impact email segmentation for growth

Getting your segmentation right isn’t about complexity. It’s about focus. Instead of building a hundred different roads, build a few major highways that get your most valuable customers where they need to go.

Your highest-impact segments will almost always be tied to your core automated flows. These are the workhorses of your email program. 1. Welcome Series: For new subscribers who haven’t purchased yet. 2. Abandoned Carts: For users who start a checkout but don’t finish. 3. Post-Purchase: For new customers, to thank them and encourage a second purchase. 4. Win-back: For lapsed customers who haven’t purchased in a while.

These four groups represent the most critical moments in the customer lifecycle. A powerful Klaviyo Abandoned Cart Flow will generate more revenue than a dozen micro-segments for one-off campaigns. Get these right first.

Once your core flows are optimised, you can use dynamic content to add a layer of personalisation without adding complexity. Have one “VIP” segment, but use dynamic blocks in your emails to show them content based on their preferred product category. This gives you the best of both worlds: a simple, manageable segment structure with deeply relevant messaging.

Your segmentation strategy shouldn’t be static. Revisit it every quarter. As your business grows, your customers evolve, and your product line changes, your segments will need to adapt. But the principle remains the same: less is more. Focus on the segments that matter, and you’ll spend less time managing your email platform and more time growing your business.

If your Klaviyo account feels more complicated than it should, we can help you fix it.