Repeat purchase rate: the cheapest growth lever you’re ignoring
Acquiring a new customer costs $50. Getting an existing one to buy again costs $2. Here’s why repeat purchase rate is the most underleveraged metric in ecommerce.
Jakob Sperber
Director
Innovation
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Every ecommerce brand has a customer acquisition machine. Paid ads, landing pages, conversion optimisation — there’s an entire industry built around getting new customers in the door. But the cheapest, most profitable growth lever isn’t acquiring new customers. It’s getting existing ones to buy again.
Repeat purchase rate measures exactly this: what percentage of your customers come back for a second (or third, or fifth) purchase. And for most brands, improving repeat rate by even a few percentage points has a bigger impact on profit than any ad campaign.
What is repeat purchase rate?
Repeat Purchase Rate = Customers Who Purchased More Than Once ÷ Total Customers
Typically measured over a specific window — 60 days, 90 days, or 12 months — depending on your product category and purchase cycle.
A 25% repeat rate means one in four customers comes back. A 40% repeat rate means nearly half do. The difference between those two numbers, applied to a customer base of 5,000, is 750 additional repeat orders — at near-zero acquisition cost.
Why repeat purchases are so profitable
The unit economics are dramatically different for repeat customers vs new customers:
CAC is near zero. A returning customer found via email, SMS, or direct costs $1–3 to reactivate vs $40–80 to acquire from scratch. Their CM3 is essentially their CM2.
Conversion rate is higher. Returning customers already trust your brand, know the product, and have payment details saved. Conversion rates for returning visitors are typically 2–3x higher than first-time visitors.
AOV tends to increase. Customers who’ve had a positive first experience often spend more on subsequent orders — they’re more willing to try new products, add-ons, or larger quantities.
Returns are lower. Repeat customers know what they’re getting. They’ve already validated sizing, quality, and fit. Return rates for second purchases are typically 30–50% lower than first purchases.
What’s a good repeat purchase rate?
Benchmarks vary significantly by category:
Consumables (supplements, skincare, food): 35–50% is strong. These products run out and need replacing — natural repeat behaviour.
Apparel: 25–35%. Seasonal and trend-driven, but loyal customers shop collections.
Home & lifestyle: 15–25%. Longer purchase cycles, but cross-category purchases drive repeats.
Single-product brands: 10–20%. Harder to drive repeats when there’s nothing new to buy. Gift purchases and replenishment are the main drivers.
If you’re below these ranges, there’s significant margin sitting on the table. If you’re above, you’ve built something customers genuinely want to come back to.
How repeat rate affects your entire P&L
Repeat purchase rate isn’t just a retention metric. It cascades through every number in your business:
It compresses CAC payback
If 30% of customers reorder within 60 days, those repeat orders contribute CM2 to your cohort’s payback calculation. A brand with $50 CAC and $40 first-order CM2 is $10 underwater. But if 30% reorder at $35 CM2 within 45 days, the cohort’s average cumulative CM2 at day 45 is $40 + ($35 × 0.3) = $50.50 — payback achieved.
It lowers your effective CAC
If you acquire 100 customers and 30 buy again, you’ve effectively generated 130 orders from 100 acquisition costs. Your cost per order drops. This is why brands with high repeat rates can afford to pay more for new customers — they know the first order isn’t the whole story.
It increases MER mechanically
Repeat purchases generate revenue without proportional marketing spend. If your ad spend stays flat but repeat orders grow, MER improves automatically. This is the healthiest way to improve MER — not by cutting spend, but by generating more unpaid revenue.
How to improve repeat purchase rate
1. Post-purchase email and SMS flows
The period immediately after a first purchase is your highest-leverage window. The customer is excited, the product is fresh, and brand recall is at its peak.
Day 1: Order confirmation with clear delivery expectations
Day 3–5: Brand story or product education (not selling — building relationship)
Day 7–14: Product tips, usage guides, or complementary product suggestions
Day 21–30: Replenishment reminder or second-purchase incentive
Day 45–60: Winback offer for those who haven’t returned
2. Subscription or auto-replenishment
For consumable products, subscribe-and-save removes the friction of reordering entirely. Even a small discount (10–15%) is worth it when you consider the alternative is a $50 CAC to reacquire a lapsed customer.
3. Product line expansion
If you sell one product, repeat rate has a natural ceiling. Customers who love your flagship product will come back for complementary products, accessories, or new releases — but only if those products exist.
4. Loyalty and rewards
Points programmes and VIP tiers work best when they’re simple and generous on the second purchase specifically. Front-load the reward to incentivise the transition from one-time buyer to repeat customer — that’s the hardest gap to close.
5. Fix the basics
Before any of the above: make sure the first experience is excellent. Fast shipping. Product quality that matches expectations. Packaging that doesn’t feel cheap. Easy returns. A customer who has a mediocre first experience won’t respond to any email flow or loyalty programme — they’ve already decided.
Measuring it properly
Track repeat purchase rate by:
Acquisition cohort: Do customers acquired via Meta have different repeat rates than Google? If so, one channel is bringing in higher-quality customers.
Product: Do customers who buy Product A repeat at higher rates than Product B? This might change which products you advertise as entry points.
Time window: 30-day, 60-day, and 90-day repeat rates tell you different things. Short windows show urgency. Longer windows show loyalty.
The bottom line
Every percentage point of repeat purchase rate improvement flows directly to your bottom line at near-zero marginal cost. It compresses payback, improves MER, and generates revenue that doesn’t require ad spend.
If you’re spending 90% of your marketing energy on acquisition and 10% on retention, you’ve got the ratio backwards. The cheapest growth lever in your business is the customer who’s already in the database.
