Email marketing averages $36–$42 return for every $1 spent — a 3,600–4,200% ROI. This is the highest ROI of any marketing channel, driven by near-zero marginal cost (sending to 10,000 subscribers costs roughly the same as sending to 1,000) and the fact that email reaches people who have already opted in to hear from you.
Calculate your own email marketing ROI: Use our free Email Marketing ROI Calculator — enter list size, open rate, click rate, and platform cost to get your full ROMI.
Where Does the $36:$1 Number Come From?
The $36:$1 figure comes primarily from the Litmus State of Email report, which surveys thousands of email marketing professionals annually. The 2023 edition reported $36 return per $1 spent; earlier editions reported as high as $42. The DMA (Data & Marketing Association) has separately reported figures ranging from $35 to $45 depending on methodology and sample composition.
The variance between sources reflects genuine differences in how ROI is calculated. Some studies include only platform costs in the denominator; others include creative and strategy costs. Some measure only direct-click revenue; others include multi-touch attribution. The honest answer is that a well-run email programme can achieve these numbers, and many poorly-run programmes fall well short.
Email Marketing ROI by Industry — 2026
Updated July 2026| Industry | Avg ROI | Open Rate | CTR | Key Driver |
|---|---|---|---|---|
| Retail / eCommerce | $45:$1 | 18% | 2.7% | Promotional and cart abandonment emails drive highest ROI |
| B2B / Professional Svcs | $38:$1 | 22% | 3.2% | Nurture sequences and case studies outperform newsletters |
| SaaS / Technology | $36:$1 | 20% | 2.8% | Onboarding and feature adoption emails show highest LTV impact |
| Financial Services | $40:$1 | 24% | 3.4% | Regulatory constraints limit promotions; advisory content works well |
| Healthcare | $28:$1 | 21% | 2.5% | HIPAA compliance restricts personalisation |
| Nonprofit | $42:$1 | 28% | 4.1% | Donation requests have high engagement among existing supporters |
| Education | $35:$1 | 23% | 3.0% | Enrolment campaigns peak seasonally |
| Hospitality / Travel | $48:$1 | 20% | 2.4% | Time-sensitive offers drive conversion; booking confirmations anchor relationships |
Sources: Litmus State of Email 2023, Mailchimp Email Benchmarks 2026, Campaign Monitor Email Benchmarks 2026. ROI figures represent industry medians for programmes with 12+ months of consistent sending history.
Email ROI by Campaign Type
Not all emails are equal. Transactional and triggered emails dramatically outperform batch-and-blast newsletters — yet many companies invest most of their email effort in the lower-performing category.
| Email Type | Avg Open Rate | Avg CTR | ROI Relative to Average |
|---|---|---|---|
| Welcome / Onboarding Sequence | 50–60% | 14–18% | Highest (3–5× list average) |
| Abandoned Cart | 40–50% | 8–12% | Very High — recovers 5–10% of abandoned carts |
| Post-Purchase / Thank You | 40–55% | 8–10% | High — cross-sell and review requests |
| Re-Engagement / Win-Back | 12–25% | 3–6% | Moderate — depends on list quality |
| Promotional / Sales | 15–25% | 2–5% | Variable — peaks during sale periods |
| Newsletter / Content | 18–28% | 2–4% | Lower direct ROI — builds long-term LTV |
| Transactional (receipts etc) | 45–65% | 10–15% | Very High — highest open rates of any email type |
Sources: Klaviyo Benchmark Report 2026, Mailchimp Email Benchmarks, Campaign Monitor 2026.
Why Email Has the Highest ROI of Any Channel
Three structural advantages give email its extraordinary ROI ceiling compared to paid channels:
Zero incremental cost per recipient. Once your email platform and template are set up, sending to 10,000 subscribers costs roughly the same as sending to 100. Paid advertising scales linearly — every additional impression costs money. Email's marginal cost is effectively zero, which is why its ROI ceiling is so high.
You own the audience. Your email list is an asset you control. Algorithm changes, platform shutdowns, and rising CPMs don't affect it. A well-maintained list of 10,000 engaged subscribers has more durable value than the equivalent paid audience — which disappears the moment you stop spending.
Opt-in intent signal. Everyone on your list chose to hear from you. This makes email conversion rates structurally higher than most other channels, where you're interrupting people who didn't ask for your message.
The Apple Mail Privacy Effect on Open Rates
In September 2021, Apple introduced Mail Privacy Protection (MPP), which pre-loads email content for all Apple Mail users — triggering an "open" in your ESP's tracking even if the person never actually opened the email.
If your email list is more than 40% Apple Mail users (common for B2B and US consumer brands), your reported open rate may be inflated by 15–25 percentage points. This doesn't affect ROI calculations if you're tracking revenue via UTM parameters — but it makes open rate an unreliable engagement signal for list hygiene decisions.
Use click rate (CTR) and click-to-open rate (CTOR) as your primary engagement metrics in the post-MPP era. If your click rate stays flat while open rate jumps, the opens are almost certainly bot-triggered.
How to Improve Your Email Marketing ROI
If your email ROI is below $20:$1, these four levers move the needle fastest:
List segmentation is the single highest-leverage activity. Segmented campaigns generate 760% more revenue than broadcast emails (Campaign Monitor, 2026). At minimum, segment by: purchase history, engagement level (active vs. lapsed), and acquisition source.
Automated trigger sequences — welcome series, abandoned cart, post-purchase, win-back — generate the highest ROI of any email type with the least ongoing effort. If you have none of these set up, start here before optimising your newsletter.
List hygiene removes the unengaged subscribers who drag down deliverability. Subscribers who haven't opened or clicked in 12+ months reduce your sender reputation and push your emails toward spam for active subscribers. A smaller, engaged list consistently outperforms a large, stale one.
Subject line testing has the highest ROI of any creative optimisation. 47% of recipients decide to open based solely on the subject line (Convince & Convert). A single subject line A/B test on your existing list requires no additional spend and can improve open rates by 20–30%.
Email Marketing ROI by List Size — 2026
The $36:$1 average applies to mature email programmes with established lists. Realistic ROI varies significantly based on list size, because small lists have higher per-subscriber costs and lower segmentation options.
| List Size | Realistic Monthly ROI | Avg Platform Cost | Notes |
|---|---|---|---|
| Under 500 | $8–$15:$1 | $0–$15/mo | Building phase — low volume, limited segmentation |
| 500–2,000 | $20–$30:$1 | $15–$35/mo | Engagement improves with basic segmentation |
| 2,000–10,000 | $30–$42:$1 | $35–$100/mo | Near industry average — automation becomes viable |
| 10,000–50,000 | $40–$55:$1 | $100–$350/mo | Scale benefits kick in — segmentation and A/B testing |
| 50,000+ | $50–$80:$1 | $350–$1,200/mo | Full automation, advanced segmentation, highest ROI |
Compiled from Klaviyo Benchmark Report 2026, Mailchimp ROI data, and Campaign Monitor industry averages. ROI figures represent achievable results with consistent sending, basic segmentation, and clean list hygiene.
What Costs Does the $36:$1 Email ROI Benchmark Include?
The $36:$1 figure from Litmus includes all costs in the denominator — not just the platform subscription fee. Understanding what's counted matters when comparing your own ROI.
| Cost Type | Included in $36:$1? | Typical Monthly Cost |
|---|---|---|
| Email platform subscription | ✅ Yes | $15–$500/mo depending on list size |
| Copywriting / content creation | ✅ Yes | $200–$2,000/mo (in-house or agency) |
| Design / creative | ✅ Yes | $100–$500/mo |
| List management / hygiene | ✅ Yes | $0–$150/mo (tools) |
| Strategy and management time | ✅ Yes (in survey responses) | 3–8 hours/month at staff rate |
| Email automation setup | Partially | One-time cost amortised over 12 months |
Key takeaway: If you're only dividing revenue by your platform fee, your calculated ROI will be artificially high. For an honest ROI number, include all staff time, creative costs, and tools — not just the Mailchimp invoice.
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Waseem Shahzad
Benchmarks from Litmus State of Email 2023, Mailchimp Email Benchmarks 2026, Campaign Monitor 2026, Klaviyo Benchmark Report 2026, and DMA Marketer Email Tracker 2024. About →