Let's start with the uncomfortable number. Industry references place email's contribution between 25 and 30% of a mature online store's revenue. On a recent audit, we opened the account of a Quebec brand doing millions: email generated 7% of revenue. The gap between the two is money sleeping inside a list that's already been paid for. Email is the only channel you own. Meta and Google rent you their audience; your list belongs to you, and every send costs fractions of a cent. When it underperforms, it's almost never a tooling problem: it's that the automations were copied from a generic template instead of being mapped to how your customers actually buy.
The founding mistake: the same flows for every brand
Open ten SMB Klaviyo accounts and you'll find the same automations with the same delays: abandoned cart at 4 hours, follow-up at 24 hours, winback at 60 days. Those numbers don't come from your customers, they come from the default template.
Yet a coffee brand repurchased every three weeks and a coat brand repurchased every two years don't share a purchase cycle. Programming the same emails at the same times for both means talking when the customer isn't listening, and staying silent when they're shopping.
The number that changes everything: your time between orders
Everything starts from a single analysis, available in your Shopify or Klaviyo data: the median time between the first and second order, then between the following ones. That's your brand's metronome.
Once that delay is known, every automation gets timed against it:
- The post-purchase cross-sell goes out when the product has been delivered and used, not three days after ordering an item that takes a week to arrive.
- The repurchase reminder lands a little BEFORE the median repurchase moment. If your customers reorder on average at day 45, the day-40 email arrives while they're thinking about it. The day-90 one arrives after they've bought from a competitor.
- The winback doesn't trigger at a standard delay, but when a customer exceeds THEIR normal cycle: that's when they actually become at risk, not before.
- The sunset (stopping sends to inactives) protects your deliverability once the winback is exhausted.
The six automations, in order of profitability
If you're starting from little, here's the build order we follow on mandates:
1. The welcome sequence. The most-opened email of the customer's entire life. Three to five messages: the brand's promise, the proof (reviews, results), the first offer. This is where the second visit is won.
2. Abandoned cart. With 7 out of 10 carts abandoned, this sequence pays for itself in week one. Two to three messages: the simple reminder, the reassurance (returns, shipping), and the incentive only as a last resort.
3. Browse abandonment. The customer looked without adding to cart. A lighter, more editorial message: the product viewed, its social proof, nothing pushy.
4. Post-purchase. The most neglected and the most strategic: confirm the good choice, help them use the product, ask for the review at the right moment, then introduce the complementary product. This is the sequence that turns a buyer into a repeat customer, and it's timed entirely on your real delivery and usage delays.
5. The cycle-timed repurchase reminder (see above). For consumables, it's often the most profitable automation in the account.
6. Winback and sunset. Recover what can be recovered, then cleanly stop writing to those who no longer open. A list you force is deliverability collapsing for everyone.
Campaigns: the calendar in service of the cycle
Automations set the floor; campaigns (one-off sends) make the peaks. Two rules keep them profitable:
- Segment by position in the cycle. A customer who just bought doesn't receive the promotion for the product they just paid for. A customer in their repurchase window receives the campaign BEFORE everyone else.
- Cadence follows engagement. Your last-90-day openers can receive two to three sends a week; the others, far fewer. Sending everything to everyone is the shortest path to the spam folder.
Compliance, non-negotiable in Quebec
Two frameworks apply here: CASL (Canada's anti-spam law) requires traceable consent and a working unsubscribe; Law 25 governs the collection and handling of personal information. An email program built on fuzzy consent isn't an asset, it's a liability. Clean consent gets collected at checkout and forms, documented, and honored.
The one-question test
Look at email's share of your revenue over the last 30 days, flows and campaigns combined. Above 25%: your machine is running, optimize it. Between 10 and 25%: the foundations are there, and timing flows to your purchase cycle is probably your next gain. Below 10%: every passing month leaves sales on the table, and the fix is known.
FAQ
What percentage of revenue should come from email in ecommerce? Industry references put a healthy range between 25 and 30% for a brand with a mature program (automations plus campaigns). Below 10%, there are almost always missing or mistimed automations.
How many emails a week can I send without burning my list? The real answer depends on each segment's engagement. The safe practice: full cadence for recently engaged subscribers, reduced cadence for the rest, and a sunset flow that retires inactives. It's the structure, not a magic number, that protects the list.
Klaviyo, Mailchimp or something else: does the tool matter? Less than the strategy. The gains described here come from purchase-cycle timing and segmentation, achievable in any serious tool connected to your store. Pick the one that reads your order data best.
Want to know exactly how much revenue your email program is leaving on the table? Get the free diagnostic