30+ Email Marketing Statistics & ROI Data for 2026

Email is the channel everyone declares dead and then keeps funding, because it keeps paying. Across the most-cited industry studies of 2025-2026, a dollar put into email comes back as roughly $36 on average and as much as $45 for retail and ecommerce brands — a return no paid social or display channel touches. Yet the same research exposes an uncomfortable truth: a thin sliver of automated, behavior-triggered emails does most of the revenue work, while the bulk blast you spent all week designing earns pennies per send. And before any of it converts, roughly one in six legitimate marketing emails never even reaches the inbox.

Everything below is sourced to a named, primary study with the original link inline — Litmus, HubSpot, Omnisend, Klaviyo, Mailchimp, Validity, and Statista, among others. We verified each headline figure against its source before publishing, decimals and all, and flagged where privacy features like Apple Mail Privacy Protection distort the number. Where a stat ties directly to promotional sends, discount emails, and coupon drops — the kind of value-led message this site is built around — we say so plainly.

Email marketing ROI

1. Email returns $36 for every $1 spent.

Litmus’ running ROI analysis, anchored to its State of Email survey of nearly 500 marketing professionals, puts the average return on email marketing at $36 for every $1 invested — higher than any other marketing channel it benchmarks. That works out to roughly a 3,500% return, and it is the figure most often quoted across the industry. (Litmus)

2. Retail and ecommerce see a higher 45:1 return.

The same Litmus dataset breaks ROI out by sector, and retail, ecommerce, and consumer-goods brands top the list at $45 for every $1 spent. These are precisely the categories that lean on promotional sends, coupon drops, and seasonal campaigns, where one well-timed offer email can move real volume. The discount-led economics behind that figure mirror what we cover in our ecommerce statistics roundup. (Litmus)

3. Top programs hitting 45:1 send newsletters, not just promos.

Litmus found that the top 8% of email programs — those clearing 45:1 ROI or better — most commonly send newsletters and onboarding emails, not relentless promotions. The lesson is not that discounts fail; it is that the highest returns come from blending value-led relationship emails with timely offers rather than blasting deals alone. (Litmus)

4. ROI is uneven — execution decides where you land.

Returns are not evenly distributed across senders. Litmus and other surveys consistently show a wide spread, with a long tail of programs earning under $20 per dollar and a leading group clearing $50-plus. The variance underlines a simple point: ROI is far less about the channel and far more about segmentation, testing, list hygiene, and deliverability. (Litmus)

Open, click, and engagement benchmarks

5. The average email open rate is 42.35%.

HubSpot’s 2025 benchmark roundup — aggregating data from Klaviyo, ActiveCampaign, Brevo, and MailerLite — pegs the average open rate at 42.35% across industries. Anything above 40% now reads as healthy, 45-50% signals strong engagement, and 50%-plus suggests an unusually loyal list. (HubSpot)

6. Average click-through is 2.3% and click-to-open is 5.3%.

Per the same HubSpot data, the average click-through rate is 2.3% of all recipients, while the click-to-open rate is 5.3% of people who actually opened. Click-to-open is the cleaner read on whether your content and offer landed, since it strips out the inflation that has crept into open-rate reporting. (HubSpot)

7. Open rates swing widely by industry.

The averages hide big gaps. HubSpot’s compilation shows retail at a 38.58% open rate (1.34% CTR), SaaS at 38.14% (6.81% CTOR), B2B services at 39.48%, nonprofit at 46.49%, and hospitality and travel at 45.21%. Categories built on mission or anticipation consistently out-open transactional retail — so benchmark against your vertical, not the global mean. (HubSpot)

8. A separate Omnisend lens puts the open-rate average near 26.6%.

Methodology matters: Omnisend, measuring across more than 20 billion campaign emails and a heavily ecommerce-skewed base, reports an average open rate closer to 26.64%, with ecommerce specifically around 30-32%. The gap with HubSpot’s 42% is not a contradiction so much as a reminder that “average open rate” depends entirely on whose list mix you measure. (Omnisend)

9. Apple Mail Privacy Protection inflates open rates by ~18 points.

HubSpot cautions that Apple’s Mail Privacy Protection preloads images and logs an “open” even when the recipient never sees the email, inflating reported open rates by roughly 18 percentage points since launch — and Apple Mail accounts for about 46% of email clients. Treat open rate as a soft signal and lean on clicks and conversions for the truth. (HubSpot)

Automated emails outperform broadcasts

10. Automations drove 37% of email sales from just 2% of sends.

Omnisend’s analysis — spanning more than 20 billion campaign emails and 470 million automated sends across 27,000+ brands — found automated emails accounted for 37% of all email-generated sales while making up only 2% of total email volume. Triggered messages, sent at the moment of intent, dwarf broadcast blasts. This is the single most important efficiency stat in the channel. (Omnisend)

11. Automated emails earn $2.87 per send versus $0.18 for campaigns.

The per-message economics are stark: automated emails generated $2.87 in revenue per send against $0.18 for one-off campaign emails — roughly a 16x difference. For any store running deals, the takeaway is to build the flows once and let them earn in the background. (Omnisend)

12. Automated emails convert 2,361% better than scheduled campaigns.

Omnisend reports automated emails posted a 2,361% higher click-to-conversion rate than regular scheduled campaigns, alongside higher open rates and roughly 332% higher click rates. Relevance and timing beat reach: an email that arrives because a subscriber did something almost always outperforms one that arrives because it was Tuesday. (Omnisend)

13. Three automations account for 87% of automated orders.

Omnisend finds that abandoned cart, welcome, and browse abandonment emails together drove 87% of all automated orders. These three flows recover intent that would otherwise evaporate, which is why they are the first automations any merchant should ship. (Omnisend)

14. Half of people who click a welcome or cart email buy.

Per Omnisend, roughly one in two people who click an automated welcome or abandoned-cart email go on to purchase — versus about one in 18 for scheduled campaigns. That conversion-after-click gap is why welcome series and cart recovery sit at the center of every high-performing program. (Omnisend)

Welcome and lifecycle emails

15. Welcome emails generate ~320% more revenue than promotional emails.

Onboarding is the highest-leverage moment in the funnel: welcome emails generate around 320% more revenue per email than standard promotional sends, and they routinely post open rates well above 80% because the subscriber just raised their hand. It is the moment to deliver the promised incentive and route a new subscriber toward a first purchase — the same retention logic we unpack in our customer loyalty statistics. (Omnisend)

16. Birthday and milestone emails convert at 14.3%.

Omnisend singles out automated birthday emails with a 43.3% open rate and a 14.3% click-to-conversion rate — among the highest of any automation type. Lifecycle triggers tied to a personal date feel like a gift rather than a blast, which is exactly why they convert. (Omnisend)

17. Transactional emails earn the highest open rates of all.

Order confirmations, shipping alerts, and similar transactional messages top every open-rate chart; Omnisend clocks shipping-confirmation emails at a 62.67% open rate, the highest of any email type. The implication for marketers: these high-attention moments are prime, under-used real estate for a relevant cross-sell or a loyalty nudge. (Omnisend)

Abandoned carts, promotions, and coupons

18. Cart-recovery emails average a 50.5% open rate.

Klaviyo’s abandoned-cart benchmark report shows cart-recovery flows averaging a 50.5% open rate and a 6.25% click rate — well above standard campaign engagement. Shoppers who left a full cart are highly qualified buyers, so a timely nudge with a clear path back to checkout converts at rates promotional blasts rarely touch. Cart abandonment itself still hovers near 70% of all carts, the friction we detail in our ecommerce statistics roundup. (Klaviyo)

19. Back-in-stock alerts convert at 5.34%.

Omnisend flags back-in-stock automations as a standout, with a 59.19% open rate and a 5.34% conversion rate (rising to 6.46% for the best-built flows). They reach people who already wanted the product and were waiting — the only job left is to tell them it is available. (Omnisend)

20. Discount emails generate 48% more revenue per send.

The reason retail posts a 45:1 ROI is the offer email. Marketing emails that include a discount generate roughly 48% more revenue per email than those that do not, and personalized promotional emails offering a discount see 29% higher open rates and 41% higher click rates. A subscriber who opted in for deals has effectively pre-qualified for exactly the message you are sending — which is the entire premise behind a deals destination like 99coupons.ai. (Mailchimp)

21. 67% of shoppers favor promo codes, and 86% will try a new brand with a coupon.

Mailchimp reports that 67% of people prefer promo codes over other discount types, and a striking 86% of online shoppers are more likely to try a new brand if they have a coupon. For acquisition emails, the coupon is not a giveaway — it is the cheapest first-purchase incentive available. (Mailchimp)

22. Most consumers subscribe to email specifically for deals.

Roughly four in five consumers sign up for promotional emails primarily to receive digital coupons and discounts, and willingness to subscribe climbs with the offer — about two-thirds will opt in for a 10% discount, rising to 73% at 20% off. This is why a clear, value-led signup incentive remains the most reliable list-growth lever in retail. (Mailchimp)

Mobile and where email gets read

23. About 53% of email opens happen on mobile.

Litmus data shows roughly 53% of all email opens happen on mobile devices, a share that has held in the 50-65% band for years depending on audience. If your template is not legible and tappable on a phone, you are losing more than half your readers before they engage. (Litmus)

24. Mobile, webmail, and desktop now split the open pie.

Breaking opens down by environment, Litmus puts mobile clients at ~41.6% of opens, webmail at ~40.6%, and desktop at ~16.2%. Webmail’s rise, driven largely by Gmail in the browser, means design has to hold up across three very different rendering contexts — not just one. (Litmus)

25. Apple and Gmail are nearly 90% of all opens.

From over 1.1 billion analyzed opens, Litmus puts Apple at about 45.5% of the email-client market and Gmail at about 23.5% — together close to 90%. Render-testing against those two ecosystems (and dark mode, which affects more than a quarter of users) covers the vast majority of your audience. (Litmus)

Deliverability: getting to the inbox

26. The average inbox placement rate is 83.5%.

Validity’s 2025 Email Deliverability Benchmark Report found a global average inbox placement rate of 83.5%. That means roughly one in six legitimate marketing emails never reaches the inbox — diverted to spam or simply lost. The best email in the world earns nothing if it is filtered out. (Validity)

27. Microsoft is the toughest inbox to reach.

Per Validity, Microsoft was the hardest mailbox provider at roughly 75.6% inbox placement, with spam rates exceeding 14% — the worst among major providers. Gmail sat near 87.2% and Yahoo around 86%. If your B2B list skews Outlook/Microsoft 365, expect a harder road and prioritize authentication. (Validity)

28. Gmail placement slid through 2024 on stricter enforcement.

Validity tracked Gmail inbox placement falling from about 89.8% early in the period to roughly 84.2% by Q4 as bulk-sender requirements tightened. SPF, DKIM, and DMARC authentication, plus consistent engagement, are now the price of admission — not optional polish. (Validity)

29. European inboxes are the easiest to reach.

Regionally, Validity found European recipients see the highest inbox placement at around 91%, a reflection of stricter data-protection norms and cleaner, consent-based lists. The pattern is a useful reminder that disciplined permission practices and deliverability tend to move together. (Validity)

Segmentation, send time, and list health

30. Segmented campaigns get 100.95% higher click rates.

Mailchimp’s segmentation study found segmented campaigns deliver 14.31% higher open rates and 100.95% higher click rates than non-segmented sends — effectively doubling clicks. Segmentation also kept unsubscribe and abuse complaints lower, so it improves both revenue and list health at once. (Mailchimp)

31. Behavioral-trigger emails can earn 10x more than ordinary sends.

Beyond list segments, Omnisend notes that emails triggered by on-site behavior can generate roughly 10 times the revenue of generic broadcast emails — the data-backed case for investing in event tracking and dynamic content rather than another untargeted newsletter. (Omnisend)

32. Tuesday is the strongest send day; evenings spike opens.

Omnisend’s send-time research found Tuesday posts the highest average open rate (with Wednesday and Thursday close behind), and that open rates peak surprisingly late — around 8 PM — while clicks cluster in the early morning and the post-work early evening. Send time is a cheap, testable lever most senders leave on the table. (Omnisend)

33. A healthy unsubscribe rate stays below 0.5%.

Across benchmarks, a good unsubscribe rate is under 0.5%, with anything below 0.2% considered excellent. Rising unsubscribes or spam complaints are early warnings of a deliverability problem, since mailbox providers read both as engagement signals. Watch them as closely as opens. (Omnisend)

The scale of email in 2026

34. There are around 4.6 billion email users worldwide.

Statista estimates the global email user base at roughly 4.6 billion people — more than half the planet — with the figure projected to keep climbing past 2026. Email remains the closest thing the internet has to a universal, owned identifier, which is why marketers treat a healthy list as a durable asset rather than rented reach. (Statista)

35. Roughly 376 billion emails are sent every day.

Industry estimates compiled by Statista and the Radicati Group put daily global email volume near 376 billion messages, on a path toward 392+ billion by 2026-2027. That sheer volume is exactly why inbox placement and relevance matter so much — standing out is harder than it has ever been. (Statista)

AI in email marketing

36. Half of marketers now use generative AI to write email copy.

Litmus’ State of Email research found that in 2025, 49% of marketers used generative AI for static email copy and 41% used it for dynamic, real-time personalization — with a 340% jump in AI image generation between 2024 and 2025. AI has gone from novelty to default tooling in two years. (Litmus)

37. AI collapsed email production time.

Litmus reports that the share of teams needing two weeks or more to produce a single email fell from 62% in prior years to just 6% in 2025 — a productivity shift it attributes largely to AI and automation. Faster production means more testing cycles, which compounds into better performance over time. (Litmus)

38. Advanced AI adopters are 75% more likely to clear 45:1 ROI.

Crucially, the gains are not just about speed. Litmus found advanced AI adopters — teams with AI woven through multiple workflow stages — are 75% more likely to achieve ROIs above 45:1 and meaningfully more likely to ship an email in under a day. Around 70% of marketers expect up to half of their email operations to be AI-driven by the end of 2026. (Litmus)

Frequently Asked Questions

These figures were pulled and cross-checked against their primary sources in May 2026, and we will refresh them as new Litmus, HubSpot, Omnisend, Klaviyo, Mailchimp, and Validity data lands. The throughline is clear: email’s outsized ROI is real but uneven, automation and segmentation do most of the heavy lifting, and a well-timed, value-led offer — a genuine discount a subscriber actually asked for — remains the most reliable way to turn an inbox into revenue. For more verified, source-backed marketing data and shopping guides, including our affiliate marketing statistics, keep 99coupons.ai in your rotation.