Email Marketing ROI Calculator
Forecast the monthly and annual revenue your email list should produce, plus revenue per subscriber and ROI on your program cost.
Your email program
Forecast
Monthly ROI
Why email ROI is still underused
Email is regularly named the highest-return marketing channel, with figures of $36 to $42 in revenue per dollar spent often cited for well-run programs. Yet many businesses underinvest because they never run the numbers. They know the platform fee, have a feeling that "email works," and never measure revenue per subscriber per month, the most useful email KPI. This calculator builds that number in seconds.
How the forecast works
Revenue per send is subscribers times open rate, times click rate of opens, times conversion rate of clicks, times average order value. Multiply by emails per month for monthly revenue, and by 12 for the year. ROI compares monthly revenue with your monthly program cost.
Revenue per subscriber shows the real picture
Open and click rates matter, but revenue per subscriber per month tells you what the list is worth. A 50,000-subscriber list earning $0.30 per subscriber each month brings in $15,000 a month, or $180,000 a year. The same list earning $1.20 per subscriber brings in $720,000 a year. The difference is rarely list size. It is segmentation, automated flows, send frequency and offer relevance.
Three levers that move email ROI
- Send frequency. Many underperforming programs send 2 to 4 emails a month. Sending more, with useful content, usually adds revenue faster than it adds unsubscribes.
- Flows, not just campaigns. Welcome, abandoned cart, post-purchase and win-back automations often become a large share of email revenue once they mature.
- Segmentation. Sending the right offer to the right segment, instead of one campaign to everyone, lifts click-to-purchase rates.
Frequently asked questions
What is a good revenue per subscriber?
For e-commerce, $0.50 to $2.00 per subscriber per month is a common range, and top programs go above that. For B2B with long sales cycles, look at pipeline influenced per subscriber instead of direct revenue.
My open rate is high but revenue per send is low. Why?
Usually the bottleneck is clicks to purchase. Subject lines drive opens, while body copy, segmentation and the offer drive purchases. Fix the offer and targeting before rewriting subject lines.
Does this account for unsubscribes from sending more often?
No. The forecast assumes a stable list. Higher frequency does cause some extra unsubscribes, so test increases gradually and watch both revenue and list health.