Signal R1: Retention
Part of the Email & Retention signal group
Ecommerce Repeat Purchase Rate Low
Most ecommerce brands lose 60–70% of first-time buyers permanently. Not because the product was bad. Because nobody followed up. The window for a second purchase opens in the 72 hours after the first order arrives, and closes just as fast. A well-built post-purchase email sequence captures 20–30% of those second sales. Most brands have nothing. That gap is Signal R1: Post-Purchase Silence.
What Is a Low Ecommerce Repeat Purchase Rate?
A repeat purchase rate measures the percentage of customers who buy more than once within a defined time window: typically 60 or 90 days after the first order.
The industry average sits at 15–20% at 60 days. A well-optimised ecommerce store reaches 25–35%. Top-performing DTC brands on Shopify average 28–32% at 60 days.
If your repeat purchase rate is below 20% at 60 days, Signal R1 is active. The cause is almost always the same: no structured post-purchase communication. The customer bought, received the product, and never heard from the brand again.
"The second purchase is the most profitable sale in an ecommerce business. The customer is already acquired. The trust is established. The only cost is the sequence that prompts the return."
Why Does the 72-Hour Window Matter?
Post-purchase engagement follows a predictable curve. The moment a customer receives their order, satisfaction is at its peak. They've just experienced the brand promise delivered. That is the highest-intent window in the customer relationship, and most brands are silent during it.
After 72 hours, the emotional peak fades. After 7 days, the brand is already receding from memory. After 14 days, re-engagement requires significantly more effort and often a discount. After 30 days, the customer is effectively lapsed.
The fix is not complicated. It is a structured email sequence that meets the customer at the right moment with the right message.
What a Post-Purchase Sequence Looks Like
A basic post-purchase sequence has 3 emails. Built in Klaviyo and triggered from Shopify order fulfilment events, it runs automatically on every new order.
Product experience check-in
Not a review request. A genuine 'how is it going?' with usage tips. Conversion goal: opens + click-through to site. This email arrives when the customer is still in the peak satisfaction window.
Education or complementary product
Show them how to get more from what they bought, or introduce the next logical product in the range. Conversion goal: second purchase. The customer trusts you: this is the lowest-friction selling moment in the entire relationship.
Social proof + review request
Now they have enough experience to review. Include UGC from similar customers. Conversion goal: review + community signal. Reviews from post-purchase sequences convert 3–5× better than standalone review requests.
Brands with this 3-email sequence in place see second-purchase rates 15–25% higher than brands without it.
What This Signal Is Costing You
At 1,000 orders per month and a £60 AOV: a brand with a 15% repeat purchase rate generates 150 second purchases per month = £9,000. The same brand with a 28% repeat rate generates 280 second purchases = £16,800. That £7,800 difference requires zero additional ad spend: only an email sequence.
The compounding cost: every month without a post-purchase sequence is another cohort of customers lost to silence. At 6 months of inaction, you have 6 cohorts of buyers who experienced the product, liked it enough not to return it, and never heard from you again.
Benchmarks
15–20%
Repeat purchase rate (industry avg)
25–35%
Repeat purchase rate (well-optimised)
72 hrs
Peak post-purchase engagement window
20–30%
2nd purchase uplift with sequence
3–5×
LTV of 3+ purchase customers vs 1× buyers
£0
Acquisition cost of the second sale
Related Signals
Welcome Flow Dead End
The welcome series is where new subscribers become first-time buyers. A low welcome flow conversion rate (below 3%) and a low repeat purchase rate often share the same root cause: no structured lifecycle communication.
LTV1LTV:CAC Imbalance
Low repeat purchase rate is the primary driver of LTV:CAC imbalance. When customers only buy once, LTV stays flat and CAC rises as a proportion of total revenue. The post-purchase sequence is the fastest LTV lever.
Frequently Asked Questions
What to Do Next
If your repeat purchase rate is below 20% at 60 days (or if you have no structured post-purchase email sequence in place) having someone map the full retention system is the right decision.
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