Email Marketing ROI Calculator
Your email numbers
Results
How to use the email marketing ROI calculator
- Enter your platform cost — Klaviyo, Mailchimp, ConvertKit, or whatever ESP you pay for, at your actual list-size tier.
- Add content and labor — copywriting, template design, and the hours someone spends building campaigns each month.
- Enter email-attributed revenue — your ESP reports campaign and flow revenue directly.
- Set gross margin — email revenue still carries product costs.
- Check the per-dollar return — email typically posts the highest ROI of any channel; if yours doesn't, the list or the flows need work.
Email: the highest-ROI channel — when you count everything
The industry loves quoting "$36 back for every $1 spent" on email. The real number for most businesses is lower but still excellent — if you count platform fees at your actual list tier, the copywriting, and the hours spent building campaigns. This calculator takes the full cost picture and your margin, and returns the ROI you'd defend in a budget meeting.
Where email revenue actually comes from
For most ecommerce brands, 60–70% of email revenue comes from automated flows — welcome series, abandoned cart, post-purchase — not from campaigns. Flows are built once and earn continuously, which is why email ROI climbs over time even with flat sending effort. If your split skews heavily toward campaigns, that's the clearest growth lever: build the missing flows.
The hidden cost curve of ESPs
Platform pricing scales with list size, and unengaged subscribers cost real money. A 40,000-contact list on Klaviyo runs $700+/mo; pruning 15,000 dead contacts can cut that by a third while raising open rates and deliverability. Re-run this calculator after a list cleaning — it's the rare cost cut that improves the revenue side simultaneously.
Attribution honesty
ESPs claim any purchase within a click (or even open) window. Cross-check against a 30-day view in GA4 or your store's discount-code data. A reasonable rule: trust click-based attribution with a 5-day window, and treat open-based attribution as marketing fiction.
Related tools
Compare channels with the PPC ROI calculator and SEO ROI calculator, or the combined marketing ROI calculator. Selling to your list? The break-even calculator converts your email profit into the volume your business needs.
Frequently Asked Questions
What is the average ROI of email marketing?
Commonly cited benchmarks run $36–$42 per $1, but those ignore labor and margin. Fully loaded, healthy programs land between 300% and 1,500% ROI — still typically the best channel available.
What costs should I include?
ESP subscription at your real tier, copy and design (outsourced or your hours at market rate), list-cleaning tools, and any SMS credits bundled into the platform bill.
How do I attribute revenue to email accurately?
Use click-based attribution with a short window (3–5 days), and sanity-check against unique discount codes or GA4. Open-based attribution inflates revenue badly, especially post-iOS 15.
Why is my email ROI low with a big list?
Usually an engagement problem: you're paying platform fees on thousands of dead contacts while sends land in spam. Prune aggressively — smaller lists frequently produce more revenue at lower cost.
Do automated flows count in this calculation?
Yes — include flow revenue in the revenue field. Flows are typically 60–70% of email revenue and the main reason email ROI beats other channels.