How to measure the ROI of an automated email sequence ?

Automating your email sequences is good. Proving that they are profitable is better. But how do you know if your sends actually generate revenue? Measuring the return on investment (ROI) of an email sequence is essential to steer your strategy and optimize your actions. What indicators should you monitor? How can you analyze your results without getting lost in the numbers? In this article, you will discover how to effectively evaluate and improve the ROI of your automated campaigns.

Defining the right indicators to measure ROI

Before wanting to optimize an email sequence, it is essential to understand how to accurately evaluate its return on investment (ROI). Indeed, without clear indicators, it’s difficult to distinguish what really works from what hinders your results.

Understanding the ROI formula applied to email sequences

The general formula for ROI is simple :
(Revenue generated – Costs incurred) ÷ Costs incurred × 100.

In the context of an automated email sequence, this amounts to comparing the revenue directly attributable to the emails sent with the costs necessary for their creation, automation, and sending.

For example, if a sequence generates €10,000 in sales for a total cost of €2,000, its ROI is 400 %.

Identifying the essential metrics to monitor

To go beyond the simple final figure, several intermediate indicators should be tracked :

Open rate: measures the effectiveness of your email subjects. A good rate is generally above 20% depending on the sectors.
Click rate: assesses the interest of your email content. On average, a click rate above 2% is considered effective.
Conversion rate: indicates the percentage of recipients who performed the desired action (purchase, registration, request for a quote).
Average value per customer: calculates the average revenue generated by each customer from the sequence.

Each of these indicators sheds light on a stage of the customer journey and helps identify areas for improvement.

Do not neglect cost estimation

The calculation of ROI is only relevant if all costs are well taken into account, particularly :

Subscriptions to emailing tools (like Dripiq or other automation platforms),
The cost of content creation (writing, design, technical integration),
Lead acquisition expenses (paid advertising, SEO content creation).

According to a recent study by Litmus (2023), every dollar invested in email marketing generates an average of 36 dollars in revenue, but this figure assumes a rigorous estimation of all costs associated with the campaign.

Optimizing your ROI through sequence analysis

Measuring your ROI is the first step. To maximize your results, it is crucial to leverage this data intelligently and continuously.

Analyzing email performance on an email-by-email basis

Each email in your sequence should be analyzed individually to detect strengths and weaknesses :

Low open rate: an unattractive subject or poor timing of sending may be the cause.
Low click rate: the content may lack relevance or clear calls to action.
Limited conversions: a lack of coherence between your promise and your landing page may explain an abandonment.

According to Campaign Monitor (2023), a simple adjustment of the subject can increase the open rate by an average of 14%. Hence the importance of detailed and regular analysis.

To streamline your optimization, it is recommended to examine each step before making overall changes.

Using segmentation and personalization

Segmenting your contact base allows you to better target your messages and increase the effectiveness of your sequences.
Some relevant segmentation axes :

Purchase behavior,
Previous engagement level,
Demographic data.

Personalization goes beyond the first name: tailoring content to the customer journey improves conversion rates by up to 6 times according to Experian.

Thus, continuously working on your segmentation ensures a better yield from your automated sequences.

Test, learn, and iterate

Finally, adopt a “Test & Learn” approach :

Run A/B tests on your subjects, visuals, or CTAs,
Analyze the results,
Gradually deploy the best versions.

A small important reminder: only change one element at a time to precisely measure the impact of each change.

Measuring the ROI of your email sequences and optimizing each step allows you to transform your campaigns into growth levers. By relying on the right indicators, you improve your performance and maximize the impact of your marketing actions.