Why Measuring Email Marketing ROI Is Essential for Growth

When you know which strategies resonate, you can allocate resources more effectively and fine-tune your approach to better match what your audience wants. Keep reading to learn more about email marketing ROI, how to calculate it, and how to increase it.

You’ll also get a clear look at how to track ecommerce ROI from email campaigns by connecting your online store directly to your email platform. This setup automatically attributes sales to specific clicks, automated flows, and promotional sends. Finally, plug those attributed sales into the standard ROI formula to see your true return.

What is email marketing ROI?

Email marketing return on investment (ROI) tells you how efficient and profitable your email marketing campaigns are. To calculate ROI for email marketing, you take net campaign profits, divide that number by the total cost, and multiply by 100 to get a percentage. Simply put, email marketing ROI tells you how much you earn back for every dollar spent.

A positive email ROI means your campaigns are delivering more in revenue than they cost to run. A negative ROI signals that it’s time to refine your email marketing strategy. Either way, understanding this number helps you make smarter decisions about where to invest your time and money. And it’s 1 of the most straightforward ways to measure ROI marketing success.

Why does email marketing ROI matter?

Email marketing ROI shows whether your campaigns generate enough revenue to justify what you spend. It also helps you identify successful campaigns and make smarter budget decisions. Those returns can be substantial, with Shopify-connected Mailchimp customers seeing up to $41 in return for every $1 spent. Retail and ecommerce brands tend to see some of the strongest returns overall.

Here are a few ways ROI helps you make better marketing decisions:

• Determine campaign profitability: See exactly which campaigns are earning more than they cost to run.
• Justify marketing spend: Back up your budget requests with concrete performance data.
• Allocate budget more effectively: Put more money behind what’s working and pull back on what isn’t.
• Identify which campaigns to scale: Identify your top performers so you can expand them to larger audiences or new markets.

What metrics influence email marketing ROI?

While ROI gives you the big picture, the individual metrics behind that number matter just as much.

These are the core metrics that influence your ROI:

• Open rate: The percentage of recipients who open your email, which reflects how well your subject lines and sender reputation perform
• Click-through rate (CTR): The percentage of email recipients who click a link in your content, which shows how engaging your content and calls to action (CTAs) are
• Conversion rate: The percentage of recipients who complete a desired action, like making a purchase or signing up for a webinar
• Revenue per email: The average revenue you earn per email, giving you a direct look at earning potential
• Bounce rate: The percentage of emails that don’t reach the inbox, which can point to list quality or deliverability issues

By tracking these metrics, you can gauge the success of your current campaigns while pulling actionable insights for future campaigns. This allows you to get maximum value from the benefits of email marketing.

How to calculate your email marketing ROI

The formula for calculating your average email marketing ROI is relatively straightforward:

Email ROI (%) = [(gross profit - cost of email campaign) / cost of email campaign] x 100

In this formula, gross profit is the total revenue generated from the email campaign, minus any direct costs associated with the product or service. The cost of an email campaign encapsulates all expenses tied to the email campaign, including platform costs, design, copywriting, and any other related costs.

Email marketing ROI calculation example

Let’s take a look at a hypothetical example to help you get the full picture:

Imagine a company spends $1,000 on an email marketing campaign. From this campaign, they made 50 sales, resulting in a total revenue of $5,000. The cost of products sold amounts to $2,000.

Now, let’s plug these numbers into the formula to calculate the ROI of email marketing for this company:

Gross profit = $5,000 (Total revenue) - $2,000 (Product costs) = $3,000

Email ROI = [($3,000 - $1,000) / $1,000] x 100 = 200%

In this example, the ROI is 200%, meaning for every dollar spent on the campaign, the company earned $2 in profit. The positive ROI shows that the campaign generated more profit than it cost. You can use this information to identify what worked, guide future marketing efforts, and decide where to reinvest your budget.

Additionally, with proven success, there’s an opportunity to scale the campaign. This could mean targeting a larger audience, replicating the campaign in different markets, or increasing the frequency. Of course, even with a high ROI, there’s always room for improvement. A/B test different elements—like subject lines to CTAs—to see if you can push the ROI even higher.

At the same time, keep in mind that marketing is dynamic. External factors, such as market shifts, new competition, and global events, can influence results. Consistently monitor your ROI, and if there’s a dip, quickly assess and adapt your email marketing strategy.

How to track ecommerce ROI from email campaigns

Tracking ecommerce ROI from email campaigns takes a clear, repeatable process. Whether you’re a content marketing manager running a small shop or a marketing leader scaling a global brand, the steps are the same. Follow this sequence to track email marketing ROI accurately and connect every send to real campaign revenue.

• Connect your ecommerce store: Sync your ecommerce business platform so purchase data flows directly into your reporting dashboard. For ecommerce specifically, this is the foundation for measuring email revenue.
• Tag and track your email campaigns: Route campaign clicks to dedicated landing pages using UTM tags. Clean tagging shows which sends drive traffic, sales, and customer acquisition.
• Capture order-level revenue: Track individual purchases and their value to see how much revenue customers generate after engaging with your promotional emails. This order-level data helps you connect specific sales back to specific campaigns.
• Attribute revenue to your email sends: Connect each qualifying order to the email campaign that influenced it. Set an attribution window, or the amount of time after an email interaction that a purchase can receive credit for that campaign.
• Calculate your ecommerce ROI: Apply the email marketing ROI formula. Subtract campaign costs from gross profit, divide by cost, then multiply by 100.

Tracking ecommerce ROI shows how your emails contribute to sales instead of stopping at opens and clicks. Use these insights to refine your email program and make more informed marketing investments.

What are the best ways to track email ROI without cookies?

You can track email ROI without third-party cookies by using first-party data from your emails, website, and ecommerce store. Tools like Mailchimp’s Site Tracking Pixel connect email clicks with customer behavior on your site. Cookieless attribution can then help connect those interactions with purchases and revenue.

Mailchimp also offers a Blotout API integration for cookieless tracking. It helps connect customer activity across the sales funnel, giving you more visibility into the path from email engagement to purchase. For instance, you can connect an email click with a later purchase to better understand which campaigns contribute to revenue.

Which email metrics matter most for improving ROI?

The most important metrics for improving your average ROI connect campaign activity to email marketing revenue. Track conversion rates, revenue per email, customer lifetime value, and click-through rates. Deliverability metrics like bounce and unsubscribe rates add context by showing whether your messages reach and retain the right audience.

Not all metrics carry the same weight when it comes to improving your ROI. Some tie directly to revenue, others reflect how engaged your audience is, and a few tell you whether your emails are even reaching the inbox.

Here’s a breakdown of the metrics you should use when measuring email marketing ROI:

High-impact revenue metrics

These metrics connect your email efforts directly to dollars earned:

• Conversion rate: The percentage of recipients who take a desired action, like checking out or filling out a form. This is 1 of the most direct indicators of whether your emails are driving real business results.
• Revenue per email sent: The average campaign revenue generated for each email you send. This helps you compare the earning potential of different campaigns side by side.
• Revenue per subscriber: The average email marketing revenue each subscriber generates over a given period. It gives you a clearer picture of how valuable your list actually is.
• Customer lifetime value (CLV): Measures the total revenue each person brings in over the entire customer relationship. Email plays a big role in nurturing repeat purchases that push this number higher.

Engagement metrics

These metrics show how your audience interacts with your emails:

• Open rate: The percentage of recipients who open your email. It reflects the strength of your subject lines, preview text, and sender reputation.
• Click-through rate: The percentage of people who click a link within your email. A strong email click-through rate means your content and CTAs are resonating.
• Click-to-open rate: The percentage of people who clicked after opening. This isolates how well the email content itself performs, separate from the subject line.

Deliverability metrics

These metrics tell you whether your emails are actually landing where they should:

• Bounce rate: The percentage of emails that don’t reach the recipient’s inbox. A high bounce rate can hurt your sender reputation and limit future deliverability.
• Spam complaints: The number of people who mark your email as spam. Even a small spike here can signal problems with your content, frequency, or list quality.
• Unsubscribe rate: The portion of recipients who opt out after receiving your email. Some churn is normal, but a rising unsubscribe rate often points to mismatched expectations or too-frequent sends.

What strategies improve email marketing ROI the fastest?

The best strategies for improving email marketing ROI help you get more from the campaigns you already send. Segmentation and personalization improve relevance, while A/B testing reveals what works. Automation helps you deliver timely messages at scale, giving each campaign more opportunities to engage subscribers and drive conversions.

Improving your strategy can make a noticeable difference in your returns. In 2023, 52% of marketing professionals reported seeing their email ROI double, according to data from EmailMonday. As email marketing continues to be a pivotal tool for small businesses, it’s increasingly important to optimize email campaigns. Beyond sending emails, make sure to effectively tailor, target, and time every email to improve results.

Here are a few strategies you can use to achieve a high email marketing ROI.

Segmenting your email list

Segmentation is the practice of dividing your email list into specific groups based on certain criteria, such as demographics, purchasing behavior, or engagement levels. The primary benefit of this approach is relevancy.

By tailoring content to specific segments, emails become more relevant, resulting in higher open rates, better engagement, and a more significant ROI. Additionally, segmentation reduces the risk of sending irrelevant content, which can lead to unsubscribes or spam complaints.

There are many different types of segmentation, including:

• Demographic: Group subscribers based on age, gender, location, or occupation.
• Behavioral: Classify subscribers by their actions, like past purchases, website traffic, or email interactions.
• Engagement level: Divide your list into groups like active readers, occasional openers, and inactive subscribers.
• Signup source: Segment subscribers based on where they joined your list, such as a webinar, social media post, or website pop-up.

Incorporating segmentation into your email strategy can help you fine-tune each message so it’s more relevant for new leads and paying customers alike. This includes adjusting your campaign’s content. Email marketing ROI can then show you which changes deliver the best results.

Personalization

A generic email is easily overlooked. However, a personalized email stands out, making the recipient feel recognized and valued. Personalized emails tend to enjoy higher open and click-through rates and lead to increased customer retention and higher transaction rates.

Essentially, personalization turns a broad message into a tailored conversation, so it resonates on a personal level and builds a deeper connection with your brand.

Some of the most common personalization techniques include:

• Using first names
• Sending tailored content and product recommendations
• Using dynamic content to change parts of the email content based on a recipient’s demographics or behavior
• Behavior-triggered emails that use automation to send based on specific actions like cart abandonments

A/B testing

A/B testing compares 2 versions of an email to determine which performs better in terms of engagement, conversions, and any other defined metric. This testing allows email marketers to make data-driven decisions and optimize emails for better performance.

For instance, by testing 2 different versions of their subject line, marketers can determine which prompts more opens. By comparing CTAs, they can see which version drives more clicks.

A/B testing removes guesswork from email marketing, providing clear insights into what resonates with the audience. Through continuous testing and refinement, it ensures that every element of an email is optimized for maximum impact.

Email automation

Automation streamlines email marketing efforts by optimizing resources and ensuring consistent, timely, and personalized communication with subscribers. Through automation, you can send a welcome email to a new subscriber, a birthday discount, or a follow-up to an abandoned cart without manual intervention.

Best practices for email automation include:

• Segmentation: Before automating, segment your email list to ensure that automated emails are tailored to different groups, enhancing their relevance and impact.
• Personalization: Even automated emails should feel personal. Incorporate elements like the recipient’s name and deliver relevant content based on their behaviors or preferences.
• Timing is key: Schedule automated emails for optimal times, considering factors like time zones and typical user engagement patterns.
• Monitor and adjust: Track success to determine the effectiveness of your marketing emails. If certain email marketing campaigns aren’t yielding the desired results, tweak the strategy accordingly.

How can you increase ROI without increasing your budget?

You can achieve a good email marketing ROI without increasing your budget by making your existing campaigns work harder. Improve deliverability, test your send timing, increase average order value, and keep subscribers engaged longer. These changes help you generate more value from your current audience and resources without adding to your marketing costs.

You don’t always need to spend more to earn more. Some of the biggest ROI gains come from getting more out of what you already have. This can include better deliverability, smarter timing, higher order values, and a healthier subscriber list.

Here are the main areas to focus on:

Improve deliverability

If your emails aren’t reaching the inbox, nothing else matters. These steps help make sure they get there:

• Clean up subscriber lists: Remove contacts who haven’t engaged in a set period. A smaller, active list performs better than a bloated list full of dead addresses.
• Use double opt-in: Require new subscribers to confirm their email address before they’re added to your opt-in list. This reduces fake signups and improves list quality from the start.
• Monitor spam complaints: Keep a close eye on complaint rates and investigate any spikes. Avoiding issues with spam filters raises ROI by helping more of your emails reach the inbox.
• Maintain list hygiene: Regularly verify email addresses and remove hard bounces. Consistent list maintenance protects your deliverability over time.

Optimize send timing

When you send your email matters almost as much as its content. A few simple tests can help you find the sweet spot:

• Test day of week: Try sending on different days to see when your audience is most responsive. Results often vary by industry and audience type.
• Test time of day: Experiment with morning, afternoon, and evening sends to find when open and click rates peak.
• Align with user behavior: Use engagement data to send emails when individual subscribers are most likely to be active, rather than relying on a one-size-fits-all schedule.

Increase average order value (AOV)

Getting more value from each conversion is among the fastest ways to boost ROI without adding to your marketing budget. Here are a few tactics that work well in email:

• Bundle recommendations: Suggest product bundles or complementary items that add value for the buyer and increase cart size.
• Cross-sell emails: Follow up on a purchase with similar product suggestions based on what the customer recently bought.
• Limited-time upgrades: Offer a short-window deal on a premium version or add-on to create urgency and encourage higher-value purchases.

Reduce subscriber churn

Keeping subscribers on your list longer means more opportunities to convert them. These strategies help reduce opt-outs:

• Improve content relevance: Make sure every email delivers something useful to the reader. Generic, one-size-fits-all content is among the top reasons people unsubscribe.
• Lower email frequency for low-engagement segments: If certain subscribers aren’t opening regularly, scale back how often you email them instead of losing them entirely.
• Offer preference centers: Let subscribers choose what types of emails they receive and how often. Giving people control over their experience keeps them on your list longer.

Tools and resources to improve your email marketing ROI

The right tools can help you track campaign costs, attribute revenue, and calculate email marketing ROI. Then, you can use market research to find email marketing ROI statistics for benchmarking and comparing your email ROI to others in the industry. These email stats can also help you determine how you stack up on other metrics, such as open and engagement rates.

To determine whether your email marketing campaigns work well, use analytics tools designed to provide actionable insights. You can use these insights to improve future marketing strategies while consistently measuring ROI and identifying new opportunities. Mailchimp offers advanced analytics products that help you track email marketing performance, audience engagement, and campaign results.

Our audience analytics dashboard, email dashboard, and customer reports provide an in-depth view of campaign performance metrics. You can track metrics from open rates and click-through rates to more advanced analytics like subscriber growth rate and engagement levels.

In addition, you can connect with your ecommerce store, aligning email and purchase data and attribute individual orders to specific campaigns. Sign up for Mailchimp today, then use this email marketing field guide for creating your first campaign.

Frequently asked questions

How does email marketing ROI vary by industry?

Email marketing ROI varies by industry, audience, and campaign strategy. Some industries see especially strong results, with top-performing ecommerce businesses achieving returns of up to $72 for each dollar invested in email marketing. Tracking your own results can help you set realistic benchmarks and see how your campaigns perform over time.

How do I attribute online store revenue to email?

To track revenue from email, connect your ecommerce store to your email marketing platform. The platform can link email-generated sales to specific campaigns and customer actions. This attributed revenue shows how much money your promotional emails generate and gives you the data needed to calculate ROI.

How does ROI differ from return on ad spend (ROAS)?

ROI measures the return on your total marketing investment, while ROAS focuses on the revenue generated by advertising spend. Marketers commonly use ROAS for paid advertising, such as paid search and social media ads. ROI provides a broader view by accounting for the overall cost of a campaign.

How does revenue attribution work without cookies?

Cookieless revenue attribution uses first-party data and other tracking methods to connect email engagement with customer behavior on your website. Your email marketing platform can then attribute purchases and revenues to specific campaigns. This approach helps you track revenue while relying less on third-party cookies.

Can automated workflows improve email ROI?

Yes. Automated workflows can improve email ROI by sending timely messages based on customer actions, such as abandoned carts. In fact, automated emails can generate 30 times higher returns than standard campaigns. Automation also saves time by keeping these campaigns running without constant manual work.