If you sell something people run out of, your growth ceiling is set by how many first-time buyers become second-time buyers. This guide covers the four levers that move that number, the metrics to track, and a 90-day order of operations I use with supplement and coffee brands.
Why retention matters more for consumables
Supplements and coffee share a property most ecommerce products lack: the customer will need to buy again. The only question is whether they buy from you, and when. Every bottle and every bag has a built-in expiry date, so the retention problem is largely a timing problem — reaching the customer shortly before they run out, with an easy way to reorder.
That is why a generic "30 days after purchase" email rarely works for these categories. A 30-capsule bottle and a 90-capsule bottle run out at very different times, and a coffee drinker finishes a 12 oz bag faster than a household that brews a couple of cups a week. The playbook below is built around that fact.
The four levers of retention
1. Replenishment timing
Calculate how long each product lasts, then send the reorder reminder before the customer runs out, not after. This single change usually does more than any amount of subject-line testing. The full method is in how to build a Klaviyo replenishment flow.
2. Subscriptions
A subscription turns a repeat purchase from a decision into a default. But subscriptions only help if they are flexible (skip, swap, change frequency) and if cancellations are handled thoughtfully. If you are choosing a platform, read Skio vs Recharge: how to choose; if you already have subscribers quietly leaving, start with how to build a cancel flow that saves subscribers.
3. Lifecycle flows and segmentation
Welcome, post-purchase education, replenishment, cross-sell, win-back and sunset: each stage has a job. Segment by behavior (product bought, order count, subscriber or not, engagement) rather than by purchase date alone. A quick way to find what is broken is a structured Klaviyo audit.
4. Measurement
Blended repeat rate hides everything. Track cohorts so you can see whether customers acquired this month behave better or worse than last quarter's. See how to read LTV and cohort retention curves.
The metrics that matter
| Metric | What it tells you | How to read it |
|---|---|---|
| Repeat purchase rate | Share of customers who order again | Measure by cohort and by product, not just blended. |
| Time to second order | How quickly customers return | Compare it with your product's days of supply. |
| Subscriber churn | Share of subscribers cancelling per period | Track by shipment number — early cancels point to expectations, late cancels to fatigue. |
| LTV : CAC and payback | Whether acquisition spend is sustainable | Use gross margin, not revenue, when you can. |
| Retention revenue share | Revenue from returning customers | A rising share relieves pressure on ad spend. |
The retention stack
- Klaviyo for email and SMS flows, segmentation and reporting.
- Skio or Recharge for subscriptions, the customer portal and cancel flows.
- Shopify as the source of order data and the checkout where subscriptions are sold.
- Meta Ads for acquisition and retargeting that hands customers into the retention system instead of stopping at the first purchase.
- A simple cohort spreadsheet or analytics tool to prove what is working.
A 90-day order of operations
- Days 1–14: audit and baseline. Review flows, segments, deliverability and subscription settings. Record baseline repeat rate, time to second order and subscriber churn.
- Days 15–40: fix the biggest leak. For most consumable brands that is replenishment timing and the post-purchase journey. Launch with an A/B test running from the start.
- Days 41–70: protect subscribers. Add flexible options (skip, swap, cadence), a cancel flow and a pre-renewal reminder.
- Days 71–90: segment, test and report. Build behavior-based segments, run the next round of tests and publish a cohort view so the gains are visible.
Common mistakes
- Copying a template flow pack without checking how long the product actually lasts.
- Offering discounts first. Discounts train customers to wait; timing and convenience usually cost less.
- Counting a "saved" subscriber as a win without checking whether they cancel 60 days later.
- Judging success by open rates instead of second orders and revenue per recipient.
Email fundamentals that support all four levers
- Klaviyo vs Mailchimp for Shopify — choosing the platform.
- Setting up Klaviyo: the first five flows — what to build first.
- Welcome email series — turning sign-ups into first orders.
- Deliverability checklist — staying out of spam.
- Why open rate is a weak metric — what to measure instead.
- What is Klaviyo? — how the platform works.
- Email list segmentation — eight segments to build first.
- How often to send marketing emails — setting cadence by segment.
- Klaviyo A/B testing — tests that tell you something.
- SMS vs email — when to use each.
- Seven cost-effective retention strategies — the short version.
What this looks like in practice
I led retention for a DTC supplement brand whose monthly revenue run-rate grew from roughly $500K to $700K, and helped a US coffee brand double revenue from $15K to $30K, using the same timing-first logic. For Clearer, I started with a Klaviyo audit and then rebuilt the lifecycle strategy, which increased retention and brought churn down. You can see all three on the case studies section of the homepage.
Tehseen Arbab
Retention and lifecycle marketer for DTC supplement and coffee brands. I led retention for a supplement brand whose monthly run-rate grew from about $500K to $700K, and I work in Klaviyo, Skio, Recharge, Meta Ads and Shopify.