By Piotr Maryanski | March 2026 | 6 min read
The maths on customer retention is better than most businesses appreciate. Acquiring a new customer costs 5–7 times more than selling to an existing one. Existing customers have a 60–70% probability of purchasing again; new prospects have a 5–20% probability. And a 5% increase in customer retention increases profits by 25–95% (Bain & Company).
Despite this, most businesses spend the overwhelming majority of their marketing budget trying to acquire new customers and almost nothing on keeping the ones they have. Here’s how to change that balance.
Why customers don’t come back (it’s usually not what you think)
The assumption is that customers who don’t return were dissatisfied. In reality, the most common reason is simpler and more fixable: they forgot about you, or they had no reason presented to come back.
They bought, they were happy, life moved on, and your brand was never front of mind again. You didn’t follow up. You didn’t remind them. You didn’t give them a reason to return. And in the intervening months, a competitor appeared in their inbox or feed and offered them something relevant.
Retention is, to a significant degree, a communication problem.
The post-purchase window
The period immediately after a first purchase is when a customer is most open to building a relationship with your brand. They’ve just proved they trust you. The experience is fresh. The question “should I buy from this brand again?” is actively in their mind.
Most businesses go silent at exactly this moment.
A post-purchase email sequence should trigger automatically after every first purchase and do three things:
- Confirm the decision was right. Order confirmation, delivery update, what to expect — reduce anxiety and reinforce that buying was a good idea.
- Add value to the purchase. How to get the most from the product. Tips, care instructions, complementary products. This improves customer satisfaction and signals that you care about the outcome, not just the transaction.
- Create a reason to return. Introduce other products, share upcoming offers, remind them when replenishment makes sense for consumable products.
The repurchase prompt
For products with a natural repurchase cycle — skincare that runs out in 60 days, coffee that needs ordering monthly, supplements taken daily — a timed repurchase email is one of the simplest and most effective retention tools available.
It works on timing: if you know the average consumption rate of your product, you can send a “time to reorder?” email at exactly the right moment. Not too early (they still have plenty), not too late (they’ve already ordered from a competitor). The email doesn’t need to be complicated. “Your [product] should be running low — here’s a quick reorder link” is sufficient.
This won’t work for every product category. But for anything consumable or replaceable, it’s close to free money.
Loyalty and repeat purchase incentives
Loyalty programmes are well-documented in their effectiveness for driving repeat purchase. The key is making them genuinely valuable rather than a points accumulation system that never converts to anything real.
The simplest version for a small ecommerce business: an exclusive benefit for customers who’ve made two or more purchases. Early access to new products, a standing discount, free shipping threshold that non-customers don’t get. This creates a tangible reason to return for a second purchase, which dramatically increases the probability of a third.
Content that keeps you front of mind
Email is the most reliable way to stay in front of customers between purchases. Not promotional email — a mix. Educational content, behind-the-scenes, product launches, stories. The businesses that customers return to consistently are often those whose emails they actually look forward to receiving.
The test: if a customer on your list received an email from you, would they be pleased to see it? Or would it feel like a promotional interruption? Getting to the former requires consistently sending content that’s worth their time, not just worth your commercial goals.
The review loop
Reviews serve both as social proof for new customers and as a retention mechanism for existing ones. A customer who writes a review has invested in the relationship. They’re more likely to return. A customer who receives a personalised response to their review feels valued. That’s a retention moment.
Building review collection into your post-purchase flow — asking at the right time, making it easy, responding to every review — creates a feedback loop that improves both your social proof and your customer retention simultaneously.
The bottom line
Most businesses have better retention opportunities in their existing customer base than they do in new customer acquisition — but almost no system to access them. Post-purchase emails, repurchase prompts, consistent valuable communication, and a genuine reason to return are the building blocks. None of them require significant budget. All of them require intention.
Getting first purchases but not repeat ones?
That’s a retention strategy problem — and it’s very fixable. Book a free call.
Frequently asked questions
What is a good customer retention rate for ecommerce?
Average ecommerce customer retention rates are around 30% — meaning roughly a third of customers make a second purchase. Brands with strong retention programmes typically achieve 45–60%. Above 60% indicates a genuinely strong loyalty or subscription component. Knowing your current rate is the starting point for improving it.
How do I get customers to buy from me again?
The most direct path: follow up after their first purchase with a well-timed email sequence, present a clear reason to return (new product, relevant offer, replenishment reminder), and stay in their inbox with content that’s genuinely worth reading between purchases. The combination of good post-purchase communication and consistent ongoing email is the most reliable driver of repeat purchase.
Do loyalty programmes work for small ecommerce businesses?
Yes, when the incentive is genuinely valuable rather than symbolic. A complex points system that takes months to redeem is less effective than a simple, tangible benefit for return customers — free shipping, early access, a standing discount. Keep it simple and make sure the benefit is clearly communicated.
Piotr Maryanski is the founder of Crunchy Ads, a North East marketing consultancy. She works with ecommerce brands on retention, email marketing, and revenue growth. See email marketing services.