Retention

How much of your revenue should email be driving?

Between a fifth and a third, for a store with a working lifecycle programme. Most of the stores we audit are at half that, and almost always for the same reason.

By The Obsidian Co. team2 min readUpdated July 21, 2026

Table of contents
  1. The benchmark
  2. Flows before campaigns
  3. Stop reporting open rate
  4. If your emails are not arriving

The benchmark

A store with properly built flows and a real campaign calendar generally sees 20% to 30% of revenue attributed to email. Materially below that is rarely a copywriting problem. It is missing infrastructure.

Flows before campaigns

Campaigns are the emails you send. Flows are the ones that send themselves. Welcome, cart and browse abandonment, post purchase and winback run permanently once built, which is why they outperform a calendar assembled the day before sending. Most underperforming programmes have two of those five and no segmentation.

Stop reporting open rate

Privacy changes made open rate unreliable years ago, and it is still the headline metric on most agency reports because it is the flattering one. Click through rate, revenue per recipient and repeat purchase rate still mean something.

If your emails are not arriving

Deliverability is usually authentication, list hygiene and sending reputation rather than the words in the email. It is the first thing worth checking, because nothing else in a retention programme matters from the spam folder.

The Obsidian Co. team

Written by the team that runs the accounts: paid media, CRO, email and SEO for ecommerce brands.

Want this diagnosed on your own numbers?

Four weeks, no fee, and the whole Engine scored in week one.