Klaviyo Flows: The 5 That Drive 80% of Email Revenue

Your Klaviyo Flows Are Running. They're Probably Still Leaking Revenue.

Most ecommerce brands have Klaviyo installed. Most have flows switched on. And most are still leaving a significant chunk of email revenue on the table because those flows were set up 18 months ago and never touched again. This is for founders and marketing managers running Shopify stores who already use Klaviyo but feel like email isn't pulling its weight. By the end of this post, you'll know which five flows drive the majority of email revenue, why each one works mechanically, and the single mistake that kills performance in each one. Start here: of the 10+ flows Klaviyo recommends, five do the heavy lifting. The rest are worth having, but if you're trying to prioritise where to focus, these are the five that move the number.

Why Most Flow Libraries Are Underperforming

Before we get into the five, here's the diagnostic pattern we see when we audit new accounts. The brand set up their flows during onboarding. They followed a YouTube tutorial or Klaviyo's default templates. The flows went live, generated some revenue, and nobody touched them again. The problem is that flows degrade. Your audience composition changes as you scale. Your product range evolves. Your ad creative shifts the type of customer coming through. A welcome flow written for a customer who found you organically performs differently when 80% of your new subscribers are coming off a Meta ad for a specific product. The flow doesn't know the difference. It says the same thing to everyone. We see this consistently in accounts we inherit. The flows are technically live. The triggers are firing. But the sequencing is off, the copy is stale, the offers don't match what's actually selling right now, and in some cases, key flows are literally broken because of a Shopify integration change nobody caught. The five flows below aren't just a list. Each section explains why the flow works at a mechanical level, what the most common failure point is, and what good looks like when it's done right.

Flow 1: The Abandoned Checkout Flow

This is the highest-ROI flow in any Klaviyo account, and it's not close. Someone added a product to their cart, started the checkout process, entered their details, and left. That's not a casual browser. That's someone who made a decision to buy and then didn't follow through. The gap between intent and action is almost always small: distraction, hesitation about shipping cost, getting interrupted, wanting to check something before paying. The checkout abandonment flow exists to close that gap before the moment passes. The mechanical reason it works is timing. A well-structured checkout abandonment flow sends the first email within 30-60 minutes of the trigger. At that point, the customer's intent is still warm. They remember what they were doing. The email doesn't need to be clever. It needs to arrive quickly, show them the product they left, and make it frictionless to come back. Where most brands get this wrong is sequence design. They send one email, 4 hours later, that says "you left something behind" with a generic product block. That's leaving 60-70% of the flow's potential on the table. A three-part sequence works better. First email within an hour: simple, friendly reminder, no discount. Second email at 24 hours: address the most common hesitation for your product category (sizing, returns, ingredients, delivery time). Third email at 72 hours: optional offer if the previous two didn't convert. The offer doesn't have to be aggressive. Free shipping or a small incentive is often enough at this stage. One of the skincare brands we work with cut their cost-per-acquisition by over 80% across three consecutive weeks through a combination of creative testing and flow restructure. The checkout flow was the first thing we touched. The sequence redesign alone moved the needle before a single ad was changed.

Flow 2: The Welcome Series

This is the most-read flow in your account, and most brands use it to talk about themselves. When someone joins your list, they're at peak curiosity. They just opted in. They want to know what you are, whether you're worth paying attention to, and what they get for subscribing. What most welcome series deliver is a company history, a "we're so excited you're here" opener, and a discount code buried in email three. The welcome series isn't brand storytelling. It's first-impression selling. The mechanical reason it works is that new subscribers have the highest open rates you'll ever see from them. The first email in a welcome series gets opened at 2-3x the rate of campaign emails. That's a window. Most brands waste it. A high-performing welcome series does four things: it delivers on the opt-in promise immediately (the discount code, the guide, whatever was promised), it tells the customer what makes the brand worth paying attention to in concrete terms, it introduces the product in a way that's tied to a real-world problem the customer has, and it creates a reason to come back (upcoming sale, new drop, content they care about). The most common failure point here is treating the welcome series as a one-size-fits-all sequence. If you're running paid ads to cold audiences, you're getting customers who subscribed via a product-specific ad. They don't need an introduction to your brand. They need reassurance about the product they just saw. Segmenting your welcome flow by source (organic vs. paid, and by product category if you're running multiple ad sets) is the difference between a 1.5% conversion rate and a 3.5% conversion rate on new subscribers.

Flow 3: The Post-Purchase Flow

Most brands treat the post-purchase flow as a logistics sequence. Order confirmation, shipping update, review request. Done. That's a missed opportunity at the moment when your customer's trust in you is at its highest. The mechanical reason this flow matters is that a new customer who buys once has roughly a 27% chance of buying again. A customer who buys twice has roughly a 45% chance of buying a third time. The window after the first purchase is when that second transaction is most achievable, and most brands do nothing with it. A post-purchase flow that drives repeat purchase typically looks like this: first, the logistics sequence (order confirmed, shipped, delivered). Then, 5-7 days after delivery, an email that helps the customer get maximum value from what they just bought. This is not a sales email. It's utility. For a supplement brand, it's a guide to getting the best results. For a fashion brand, it's how to style the piece. For a skincare brand, it's a routine that includes the product. This email builds confidence that the purchase was the right call. Then, 14-21 days after delivery, introduce the natural next product. Not a random cross-sell. The product that makes sense given what they bought. If someone bought a starter kit, show them the refill or the next step in the range. The framing matters: "Now that you've had two weeks with X, here's what most customers add next." One of the food brands we manage grew gross sales by 77% month-on-month partly by building a proper post-purchase sequence that pushed complementary products and drove repeat transactions from a growing customer base. Email was a meaningful contributor to that result, not a passive channel.

Flow 4: The Browse Abandonment Flow

This one is often skipped because it feels lower-intent than checkout abandonment. Someone looked at a product page and left. No cart. No checkout. Just a visit. The reason it's worth building is volume. For every person who starts checkout, there are 10-15 who visited a product page and left. The conversion rate is lower, but the audience is dramatically larger. And for high-consideration products where the purchase decision takes days or weeks, browse abandonment is where you stay in front of those buyers without spending more on ads. The mechanical reason it works is recency. A browse abandonment email that lands within a few hours of the visit reminds the customer what they were thinking about before real life interrupted. It doesn't need a big offer. A subject line that references what they looked at, a clear product image, and a single sentence that answers the most common hesitation for that product category is often enough. Where brands fail here is setup. Browse abandonment requires proper event tracking in Klaviyo, which requires the Klaviyo snippet to be firing correctly on product pages and for "Viewed Product" events to be passing through cleanly. We've audited accounts where the browse abandonment flow existed, was switched on, and was sending zero emails because the tracking event wasn't set up properly. Nobody noticed because nobody checked.

Flow 5: The Win-Back Flow

Your existing customer list is one of the most valuable assets in your business. Most brands never deliberately work it. A win-back flow targets customers who bought once, 90-120 days ago, and haven't purchased again. These are people who liked you enough to buy once. They're not cold. They just drifted. A win-back flow exists to give them a reason to come back before they forget you exist. The mechanical reason it works is cost efficiency. You're not paying to acquire these people. They're already in your list. The cost to send a win-back email is negligible compared to the cost of acquiring a replacement customer via paid ads. A win-back sequence that performs well usually starts with curiosity and value, not a discount. Email one: "Here's what's changed since you last ordered" (new products, new formula, new range). Email two, 7 days later: a soft incentive, framed as a "we want you back" offer rather than a panic discount. Email three, 14 days later: a final reason to act, with a clearer offer. The most important thing to get right in a win-back flow is the timing of the incentive. Brands that lead with a discount on email one are training their customers to wait for discounts. Lead with value and relevance first. The incentive is a last resort, not an opener.

The Audit Question Most Brands Don't Ask

Here's the thing: almost every ecommerce brand running Klaviyo has at least 3-4 of these flows switched on. The question isn't whether they exist. It's whether they're performing at anything close to their potential. Run this check on your account today. Go into Klaviyo's flow analytics. Look at the revenue per recipient for each flow. Compare it to Klaviyo's published benchmarks for your category. If your checkout abandonment flow is generating less than $3 per recipient, something is broken or underoptimised. If your welcome series has a sub-20% open rate on email one, the offer or the timing is wrong. Most brands who do this audit find at least one flow that's either broken or significantly underperforming. Finding it is the first step. Fixing it is where the revenue comes from. The other question worth asking is whether your flows are segmented by traffic source. If you're spending on paid ads and sending those subscribers through the same welcome and post-purchase flows as your organic audience, you're not speaking to what they actually know about you. Paid subscribers need different framing. Not different products, different context.

Email Revenue Should Be 20-35% of Your Total

A well-run Klaviyo account typically generates 20-35% of total ecommerce revenue from email alone. Flows (automated sequences) should account for roughly half of that. If email is sitting at 10-12% of your revenue, the issue is almost always in the flows, not the campaigns. Getting this right doesn't require reinventing your email strategy. It requires auditing what you already have, identifying where the leaks are, and fixing the specific failure points in each flow. The five covered above, working properly, will move your email revenue share more than any campaign calendar. If you want a pair of eyes on your Klaviyo setup before you start rebuilding, our Retention Engine service is built specifically for brands who want to turn email and SMS into a reliable growth channel. Or if you'd prefer to start with a broader look at what's limiting your growth across paid and owned channels, a Growth Diagnostic Call is 30 minutes and gives you a clear picture of where the biggest opportunity sits in your account. Most brands who do the call find there are 2-3 specific, fixable things holding their email revenue back. That clarity is worth the 30 minutes.