How to Increase Repeat Purchases and LTV Without Depending Entirely on Paid Ads

Why growth that runs only on ad spend is fragile

When every sale depends on a new ad impression, revenue stops the moment spend stops, and each customer has to cover their acquisition cost on a single order. Many brands are in this position: Shopify, citing The CMO Survey 2026, reports that customer acquisition spending is 26% higher than retention spending, and that the gap is widening (5).

Loyalty cannot be assumed either. Shopify, citing Attentive's 2026 study, reports that 88% of shoppers have bought from a brand new to them in the past three months (6). Your customers are offered alternatives constantly, so repeat purchases have to be designed rather than hoped for.

The aim is not to switch off ads. It is to make each acquired customer worth more, so the same ad budget produces more profit.

Calculate LTV in a way you can act on

Revenue-based LTV is average order value (AOV) multiplied by annual purchase frequency and average customer lifespan (7). It is useful for seeing which lever moves the number, but it overstates what a customer is actually worth to you.

For spending decisions, use margin-adjusted LTV: multiply the same formula by gross margin (1). The result is gross profit per customer before acquisition and other operating costs (1), which is the ceiling your acquisition cost has to stay under.

The formula also shows the three places where retention work pays off:

• AOV: complementary product recommendations and bundles raise the value of each order.
• Purchase frequency: replenishment reminders and loyalty rewards bring customers back sooner.
• Lifespan: win-back messages stop good customers from quietly drifting away.

Use LTV to decide how much you can pay for a customer

Once you have margin-adjusted LTV, compare it with your CAC. A 3:1 LTV-to-CAC ratio is a common reference point, but it does not fit every business, so weigh it against your margins, your payback period and your cash needs (8). A brand that waits months for a customer to repay their acquisition cost needs more cash on hand than one that recovers it on the first order.

Run the comparison per acquisition channel, not only as a blended figure, because a healthy blended ratio can hide a channel that brings in low-value customers at a high cost (9). If customers from one platform rarely buy again, a low CAC on that platform may be misleading.

Many store owners skip this step entirely. In Shopify's Q4 2025 survey of 500 store owners, 30% of those with more than $1 million in revenue said they track CAC, compared with 5% of those under $100,000 (10). If you are unsure which number should guide your spending decisions, read the difference between MER, ROAS, POAS and ROI.

Build a post-purchase sequence on email and WhatsApp

The period right after the first order is when a one-time buyer becomes a repeat customer, so plan the messages in advance instead of sending occasional broadcasts. Shopify's examples of post-purchase messages include (2):

• A thank-you message after the order.
• Complementary product recommendations a week after the first purchase.
• Replenishment reminders for items the customer uses regularly.
• Win-back messages for customers who have gone inactive.

What subscribers want should shape what you send. Shopify, citing Attentive's 2026 study, reports that 71% of email subscribers stay on a list for sales and promotions, and 23% stay for restock reminders on items they use regularly (11). If your products are used up and reordered, give replenishment reminders a central place in the sequence.

The same sequence can run on WhatsApp alongside email. Decide which messages suit each channel, keep WhatsApp for messages the customer is likely to welcome, and make sure the two channels do not repeat each other.

Launch a loyalty programme that is simple to run

A loyalty programme does not need to be complicated. It can be as simple as rewarding the second purchase or a spending threshold, with points that convert to store credit, vouchers or free shipping (3). Rewarding the second order directly targets the move from first-time buyer to repeat customer.

Customers respond to these programmes. Shopify, citing LoyaltyLion's 2026 study, reports that 70% of customers are more likely to shop with brands that have a loyalty programme (12). Citing Deloitte's 2025 survey, it also reports that 72% of US loyalty programme members say programmes make them more likely to spend with their preferred brand, and 56% increase spending because of the programme (13). The Deloitte figures describe US members, so treat them as a direction rather than a forecast for your own market.

Price your rewards against margin-adjusted LTV (1), so the programme raises profit per customer rather than giving your margin away.

Win back lapsing customers with offers your margins can carry

Not every inactive customer deserves the same effort. Build a segment of high-spending customers whose last order falls outside their usual buying cycle, and target them specifically to bring them back (14). This focuses your win-back budget on the customers you lose the most by losing.

Be careful with discounts: use win-back discounts only if your margins support them (4). Shopify, citing Attentive, says VIP-only discounts are the top offer type that keeps customers buying, and suggests testing store credit against percentage discounts (4). Store credit can only be spent in your store, so it gives the customer a reason to return.

Sources

1. (1) Shopify · 2026-10-08
2. (2) Shopify · 2026-09-01
3. (3) Shopify · 2026-09-01
4. (4) Shopify (citing Attentive 2026) · 2026-09-01
5. (5) Shopify (citing The CMO Survey 2026) · 2026-10-08
6. (6) Shopify (citing Attentive 2026) · 2026-09-01
7. (7) Shopify · 2026-10-08
8. (8) Shopify · 2026-10-08
9. (9) Shopify · 2026-10-08
10. (10) Shopify · 2026-10-08
11. (11) Shopify (citing Attentive 2026) · 2026-09-01
12. (12) Shopify (citing LoyaltyLion 2026) · 2026-09-01
13. (13) Shopify (citing Deloitte 2025) · 2026-09-01
14. (14) Shopify · 2026-10-08

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• How to Calculate Your Break-even CAC