Email Marketing Statistics 2026: Open Rates, ROI & Industry Benchmarks

people worldwide are projected to use email by 2025 — making it the world's largest digital communication channel by a wide margin.

emails sent and received globally every day in 2023, a figure expected to reach 408 billion daily emails by 2027.

of email users check their inbox every day — most check multiple times. No other channel offers this frequency of attention from the same audience.

of B2B marketers use email as a primary distribution channel for their content — the highest adoption rate of any single channel.

of consumers say marketing emails influence their purchasing decisions, and 80% of small business owners say email is their primary customer acquisition tool.

Average return for every $1 spent on email marketing — the highest ROI of any marketing channel, year after year.

Email marketing ROI per dollar spent as measured by HubSpot — slightly lower than Campaign Monitor's figure but still dramatically ahead of paid search and social.

increase in email-generated revenue for companies that segment their campaigns by behaviour, purchase history, or subscriber attributes.

of business professionals say email marketing increases customer retention — the highest retention-impact score of any single marketing channel surveyed.

of email marketing revenue is generated by automated email sequences triggered by subscriber behaviour — not manual broadcast sends.

more revenue generated by triggered email automations (abandoned cart, welcome series, re-engagement) compared to standard newsletter broadcasts with similar send volumes.

Average email open rate across all industries — the cross-industry benchmark to measure your performance against (note: iOS privacy changes have inflated this since 2021).

Average open rate for the government sector — the highest of any industry category, reflecting mandatory communications and a captive subscriber base.

Average open rate for education-sector emails — reflecting engaged audiences of students and parents who expect relevant communications.

Average open rate for ecommerce emails — typically the lowest of major industry categories, given the high promotional volume and low subscriber engagement.

Average open rate for welcome emails — the single highest open rate of any email type, making the first email in a sequence the most important one.

higher open rates for emails with personalised subject lines compared to generic subject lines sent to the same list.

Average click-through rate across all industries and email types — a useful baseline, though segmented and personalised campaigns consistently double this.

Average click-to-open rate (CTOR) — the percentage of openers who then click — a more reliable engagement metric than raw CTR in a post-Apple Privacy world.

Average unsubscribe rate per send — keep yours below this and your list health is strong. Above 0.5% indicates relevance or frequency problems.

highest email open rates by day of week — followed by Thursday. Monday and Friday consistently underperform the weekly average across most industries.

Peak email engagement window — emails sent between 9–11 AM local time consistently generate higher open and click rates than evening or late-night sends.

higher transaction rates for personalised emails compared to non-personalised emails sent to the same subscriber base.

of marketers say subscriber segmentation is the email marketing tactic that most improved their program performance in the past year.

higher open rates for segmented email campaigns versus non-segmented campaigns sent to the full list — with proportional improvements in clicks and revenue.

of consumers say they only engage with personalised emails — and 38% say they will unsubscribe from a list if content feels irrelevant to their needs.

higher click-through rates for emails using dynamic content that adapts based on subscriber profile, location, or purchase history versus static content.

of abandoned cart emails are opened — and of those who open, 21% click through and complete their purchase. Cart recovery is the highest-ROI automation available to ecommerce businesses.

more revenue generated by welcome email series (3–5 emails) compared to a single welcome email sent immediately after signup.

of email marketing revenue comes from automated birthday and anniversary emails — high-ROI sends that require zero ongoing effort after initial setup.

of companies that use marketing automation achieve positive ROI within 12 months — with email automation cited as the primary driver in 68% of those cases.

of email subscribers who receive a re-engagement sequence (win-back campaign) become active again — saving list value that would otherwise be lost to attrition.

of marketing emails reach the intended inbox globally — meaning roughly 1 in 5 emails never reaches the subscriber, lost to spam filters or invalid addresses.

of email addresses on a typical list become invalid or inactive every year through natural churn — making regular list hygiene critical to deliverability.

Maximum spam complaint rate threshold before major email providers (Gmail, Outlook) begin routing future sends to spam folders — keep yours well below this.

higher deliverability rates for senders using email authentication standards (SPF, DKIM, and DMARC) versus those without authentication configured.

of email subscribers say they have marked an email as spam simply because it was too frequent — over-sending is the number-one driver of spam complaints.