~2 min read
Email marketing consistently delivers the highest ROI of any digital marketing channel. The DMA (Data & Marketing Association) reports an average return of $36–42 per $1 spent — but that average hides enormous variance. The difference between a top-performing email program and a mediocre one is almost entirely in open rate, click rate, and list quality.
The email revenue funnel
Opens = List Size × Open Rate Clicks = Opens × Click-Through Rate Conversions = Clicks × Conversion Rate Revenue = Conversions × Average Order Value
Industry benchmark rates
| Metric | B2B SaaS | E-commerce | Newsletter |
|---|---|---|---|
| Open rate | 20–30% | 15–25% | 30–50% |
| Click rate (of opens) | 5–12% | 8–15% | 4–8% |
| Conversion rate (of clicks) | 3–8% | 2–5% | 1–3% |
Why list quality matters more than list size
A 1,000-subscriber list with 35% open rate outperforms a 10,000-subscriber list with 8% open rate in both revenue and deliverability. Segment your list by engagement — suppress inactive subscribers (no opens in 90 days) to improve deliverability metrics and open rates across the board.
Types of email campaigns to model
- Product launch / promotional: one-time campaign to full list or segment
- Onboarding sequence: automated sequence triggered by signup — typically highest ROI
- Re-engagement campaigns: win back lapsed subscribers; usually 5–15% conversion to active
- Newsletter: content-led; lower direct conversion but compounds audience trust
Frequently asked questions
How do I improve open rates? Subject line testing (A/B test at 20% of list before sending to full list), send-time optimization (typically Tuesday–Thursday 10am–2pm in recipient timezone), and list hygiene (remove unengaged subscribers) are the three highest-impact levers.
What conversion rate should I expect? Conversion rate depends heavily on the offer. A strong promotional email to a warm list for a $49 product can convert 5–10% of clicks. An outreach email for a $10k contract might convert 1–2% of clicks but generate substantial revenue per conversion.