- A post-purchase flow covers the gap between "order placed" and "running low." Its job is to get the customer to the reorder happy.
- First-time buyers and repeat customers should get separate paths. They're in completely different places.
- The post-purchase flow should end before the reorder reminder starts, so the two don't step on each other.
- Judge it by clicks and second orders, not opens.
What is a post purchase email flow supposed to do?
It's the set of emails a customer gets after they buy, triggered by the order. Shopify already sends the order confirmation and shipping updates. The post-purchase flow is everything else.
For a consumable product, it has one big goal: get the customer from order one to order two. That means three jobs:
- Reassure. They just spent money on something new. Remind them why it was a good call.
- Help them use it. A product that's used wrong, or not at all, never gets reordered.
- Set up the next order. Plant the idea of how long it lasts and what comes next, without pushing a sale the day after they paid.
It's one of the core flows I install for every brand. When a skincare brand rebuilt its flow system, post-purchase was one of the flows rebuilt, alongside welcome, reorder reminder, browse, window shopper and winback. Email revenue went from $48,193 for all of 2025 to $203,777 in the first 7 months of 2026. That's the whole system working together, not post-purchase alone, but it's part of the chain.
Should first-time buyers and repeat customers get the same post-purchase flow?
No. My Flow System splits every flow into separate paths for different people. In post-purchase, the split that matters is first order vs repeat order.
A first-time buyer doesn't know how to use the product yet, how long it lasts, or whether it'll work for them. A customer on their fourth order knows all of that. Sending them the same "here's how to get started" email is a waste of their attention, and a little insulting.
In Klaviyo, you can split the flow right after the trigger with a check on how many orders the person has placed. One path for first-timers, one for everyone else.
What should the first-time buyer path send?
Here's the sequence I'd start with. Adjust the timing to your shipping speed and how long your product lasts.
- Right after the order: thank you and what happens next. Short and human. A note from the founder works well here. Tell them when to expect it and what to do when it arrives. Don't sell anything.
- Around delivery: how to use it. The one or two things that make the biggest difference to their results. How to take it, how to store it, how to make it taste or work best.
- A week or so in: what to expect. When will they notice something? What's normal? Answer the questions that make people quit early. This is a good place for real customer reviews.
- Mid-supply: the bigger picture. Why you made the product, what's in it, what else you sell that fits with it. A soft introduction to the rest of the range or to a subscription option.
- Before the reorder window: the handoff. End the flow here and let the reorder reminder take over.
Spend most of your effort on email 1. In the welcome flow, my pooled data across four consumable brands shows email #1 earning about 30x what each later email earns. I don't have the same cut for post-purchase, but the first email after an order gets the most attention either way. Make it count.
What should repeat customers get instead?
Less. A repeat customer doesn't need to be taught how to use the product. Here's a shorter path:
- Thank you. Quick and genuine. Acknowledge that they're coming back.
- Something new. A product they haven't tried, a new flavor, or a bundle that pairs with what they bought.
- A reason to make it easier next time. If you offer a subscription, this is the customer to offer it to. They've already shown they reorder.
Then hand them off to the reorder reminder, same as first-timers.
How long should a post purchase email flow be?
Long enough to cover the time before the reorder window, and no longer. For a 30-day product, that might be three or four emails across the first two to three weeks. For a 90-day product, you've got more room to space things out.
The important part is that it ends before the reorder reminder begins. If both flows are running at the same time, a customer can get "here's how to use it" and "time to reorder" in the same week. That's confusing and it reads like nobody's paying attention.
Map out both flows on one timeline before you build either. My guide to the Klaviyo replenishment flow covers the reorder side. Across four consumable brands in my data, that flow earned about $2.23 per person, so it's worth making sure post-purchase hands off to it cleanly.
What are the most common post-purchase mistakes?
These are the ones I'd check for first:
- No split between first-time and repeat buyers. Everyone gets the beginner emails forever.
- A discount the day after they paid full price. It trains them to wait for a code and annoys the people who just bought.
- Asking for a review before the product has arrived. Or before they've used it long enough to have an opinion.
- Cross-selling in email 1. Let them get the first product before you pitch the second.
- Overlapping with the reorder flow. Two flows, two messages, one confused customer.
- Judging it by opens. Apple Mail inflates opens. Look at clicks and whether people place a second order.
How does post-purchase fit with the rest of your repeat purchase emails?
Post-purchase is the first link in a chain. It hands off to the reorder reminder, which hands off to winback if they don't come back. If you sell subscriptions, subscribers get pre-charge reminders instead of the reorder flow.
If your welcome flow is the first impression for people who haven't bought, post-purchase is the first impression for people who have. I cover the pre-purchase side in my post on the welcome email series.
For how all of these pieces fit together, read my full guide to a repeat purchase email strategy.
Where these numbers come from
The welcome email and replenishment figures come from pooled data across 4 consumable brands: 2,897 campaigns and $17.7M in email revenue. It's a small sample, so treat it as directional. The skincare numbers are from a single brand.
FAQ
When should the first post-purchase email send?
Right after the order, or within the first day. Shopify's order confirmation handles the receipt, so this one can be a warmer thank you with what happens next. Keep it short.
Should I ask for a review in the post-purchase flow?
Yes, but not too early. Wait until they've had the product long enough to have an opinion. For most consumables, that's at least a week or two after delivery.
Should post-purchase emails include a discount?
Not early on. They just paid full price, and a discount the next day can feel like a slap. If you use an offer at all, save it for the reorder or winback stage.
Do I need a separate post-purchase flow for each product?
Not always. If your products are used in similar ways, one flow with a few product-specific blocks can work. If the products are very different, like a supplement and a skincare product, separate paths make the "how to use it" emails actually useful.
What's the difference between post-purchase and a replenishment flow?
Post-purchase covers the first days and weeks after the order: thanks, how to use it, what to expect. The replenishment flow comes later, right before they run out. One sets up the reorder, the other asks for it.
Founder of Bardown Digital, a Chicago-based Klaviyo email and retention agency for Shopify brands. He's worked with brands doing $500K to $100M a year, with $100M+ in email-attributed revenue across them.