Klaviyo Replenishment Flow: Build Consumption-Based Reorder Logic

⏱ 11 min read

One of the highest-ROI automations a consumable brand can run is also one of the laziest in most accounts. The typical Klaviyo replenishment flow waits a flat 30 days after purchase, fires a “time to reorder” email, and calls it retention. It earns a little money, so nobody questions it. That round number is a guess, and the whole flow inherits the guess.

The fix is not more emails. It is better timing logic. Replenishment should be built on how fast each product is actually consumed, not on a calendar default that treats coffee, supplements, and skincare as if customers burn through them at the same rate. This guide shows how to build product-specific replenishment flows in Klaviyo, how to time them off real consumption windows, and how to prove the flow is adding revenue rather than subsidising orders you were getting anyway.

The stakes are not small. In Klaviyo’s 2026 email benchmarks, automated flows generated close to 41% of email revenue from just 5.3% of sends, and the average flow places orders at roughly 2.11%, rising to 4.3% for the top 10% of performers. A replenishment flow sits directly on top of your most profitable audience: people who already bought and liked the product enough to need more.

Why Most Replenishment Flows Fail

Replenishment is for products customers use up. That part is obvious. The failures start at the very first decision: when to send.

Brands Pick One Round Number for Everything

The default setup picks 30, 45, or 60 days because it is tidy, then applies it to every consumable in the catalogue. One blunt timer for a list of products with completely different lifespans. The email lands either weeks before the customer has run low, where it reads as noise, or days after they have already reordered somewhere else. Both outcomes train the customer to ignore the flow.

Products Are Consumed at Very Different Speeds

Consumption cycles are not close to uniform. The same store can hold products that need reordering every two weeks and others that last three months.

The ranges above are practical planning estimates, not fixed rules. The point is the spread: a single 30-day timer is wrong for most of this list most of the time. Always confirm your real cycle from your own order data before trusting a category average.

Two Customers, Same SKU, Different Reorder Date

Even within one product, usage differs. Customer A takes a daily supplement and runs out almost exactly on schedule. Customer B uses it three times a week and lasts far longer. Send them the same reminder on the same day and you are right for one and wrong for the other. This is the ceiling on what flat timing can ever achieve, and it is why timing needs more than a single delay step.

Why “Just Use Predictive Analytics” Is Not the Full Answer

Most guides point you straight at Klaviyo’s predictive analytics and the Expected Date of Next Order (EDNO) metric. It is a useful tool, but it has a limitation that those guides rarely mention, and it matters here.

Klaviyo states it directly in its predictive analytics documentation: the Expected Date of Next Order does not consider which products a customer ordered. It predicts the next order at the account-behaviour level. So if you sell items with genuinely different cycles, Klaviyo’s own recommendation is to build separate Placed Order triggered flows for each cycle, using trigger filters and a time delay that matches the known cycle, rather than relying on a single EDNO countdown. Klaviyo also advises against counting down to EDNO for repeat buyers, since they end up getting the same sequence before every order, which drives unsubscribes.

There are two more gates worth knowing before you lean on predictions. Klaviyo’s predictive metrics only unlock once you have at least 500 customers who have placed an order, at least 180 days of order history with orders in the last 30 days, and some customers with 3 or more orders. Below that, EDNO is not available and product-specific timing is your only reliable route anyway.

What High-Performing Replenishment Flows Do Differently

The strong setups share one trait: timing comes from data, and the flow adapts to behaviour instead of firing one email into the void. Here is the framework.

Step 1, Segment by Product Consumption Cycle

Group products not by category name but by how fast they are used up. Skincare and supplements might both sit in a “45-day” group; coffee and a fast-burn serum might share a “20-day” group. Build one Placed Order triggered flow per cycle group, each with a trigger filter limiting it to those products. This is cleaner than one flow per SKU and far more accurate than one flow for everything.

Step 2, Estimate the Consumption Window (And Adjust for Quantity)

Pull the real number before you trust any estimate. Inside Klaviyo, look at average days between orders for customers with two or more purchases, or sample the gap between first and second order for repeat buyers. That is your true cycle, and it usually does not match the round number you would have guessed.

Then trigger before the product runs out, not on the day it does. A 30-capsule, once-daily supplement lasts about 30 days, so the first reminder should land around day 24 to 27. Klaviyo’s own guidance for a 30-day supply is a reminder near day 25.

The detail most flows miss: quantity changes the cycle. If a customer buys two units of a 30-day product, their reorder point is closer to day 55, not day 25. Add a conditional split on quantity ordered so a bulk buyer is not pestered a month early.

Step 3, Use a Reminder Sequence, Not One Email

One email is a single shot at a moving target. A short sequence covers the window. Klaviyo’s rule of thumb in its replenishment flow guide is two reminders, then a follow-up after the projected cycle that can carry an incentive. A practical four-step shape for a 30-day cycle:

1. Day ~25: gentle reminder, no discount. Most reorders happen here, at full margin.
2. Day ~30: second reminder, lead with convenience and one-click reorder.
3. Day ~34: add urgency or a modest, time-boxed incentive for fence-sitters.
4. Optional close: final nudge before the offer expires.

If the customer is SMS-subscribed, layering an SMS at the offer-open point usually outperforms email alone. Layer it, do not replace the emails with it. One more non-negotiable: turn Smart Sending off in this flow. The whole point is to hit a specific moment in the reorder cycle, and Smart Sending will suppress the email that lands on it.

Step 4, Add Behavioural Branching

Make the flow react. Branch on what the customer does:

• Opened or clicked but did not buy: send a stronger, more specific follow-up.
• Ignored entirely: change the angle, lead with convenience or a reason to act now.
• Reordered: remove them from the flow immediately.

That last rule is the one brands forget. Klaviyo’s pre-built replenishment flow includes a profile filter that checks before every send that the customer has not purchased the product since entering the flow. Keep that filter, and if you are limiting the flow to a specific product, limit the filter to that product too. Without it, you email people who already reordered, which is the fastest way to teach loyal customers to mute you.

What to Send in Replenishment Emails

Reminder Messaging

The opening email should feel like a service, not a sale. “Running low?” with a clear path back to the exact product they bought does most of the work. Show the product they actually purchased, not a generic catalogue. For something like coffee, a relevant suggestion such as a new flavour or a complementary item can lift the order without feeling pushy.

Convenience Messaging

The second angle is friction removal. A one-click reorder, a pre-filled cart, or a nudge toward a subscribe-and-save option turns “I should reorder” into a single tap. For consumables, convenience often beats discount, because the customer already wants the product.

Incentive Messaging

Use discounts last and sparingly. Lead with full-margin reorders, then layer a modest, time-boxed offer onto the back half of the sequence for the people who did not move. Reaching for a coupon on email one trains your most loyal buyers to wait for the deal that always comes. We made the full margin case in stop discounting customers who would buy anyway.

Metrics That Tell You the Flow Is Working

Track the numbers that map to revenue, not just opens. For a replenishment flow, the ones that matter:

• Reorder rate from the flow: share of entrants who repurchase the product.
• Repeat purchase rate: 30, 60, and 90-day cohorts, so you see the cycle, not a snapshot.
• Time to second purchase: tells you whether your trigger timing is right.
• Revenue per recipient (RPR): the cleanest efficiency measure for the flow.
• Replenishment conversion rate: placed orders divided by recipients, compared against the ~2.11% average flow benchmark.

How to Build This in Klaviyo

Once the timing logic is set, the build is quick. Each step below has one job, and the right column tells you why it matters so you do not skip it.

For the click-by-click version, Klaviyo’s replenishment flow guide and its advanced segmentation reference cover the build conditions in detail.

The Question Almost No One Asks: Did the Reorder Discount Pay for Itself?

A replenishment flow that “drove thousands of reorders” tells you nothing about how many of those reorders would have happened anyway. The customer ran low, they were always coming back, and your day-34 coupon just handed away margin on a sale you had won. To know the difference, withhold the incentive from a small randomised slice of the flow’s audience and compare their reorder rate against the group that got the offer. The gap is the real lift. If both groups reorder at nearly the same rate, the discount is subsidising sales you already had, and that part of the sequence should run at full margin.

This is the step that turns a replenishment flow from a habit into a measured system. The best flows do not feel like marketing. They feel like good timing: the reminder arrives the week you were about to run out, the reorder takes one tap, and the brand looks like it was paying attention. Get the timing right per product, prove the incentive earns its place, and replenishment becomes one of the most profitable automations in your account.