Email Marketing ROI Calculator
Estimated ROI comparing email-attributed revenue with the cost of running email marketing.
Open calculator →CAC Calculator
Sales + marketing spend in a slice ÷ newly acquired customers counted the same window.
Overview
Use when CFO and growth leads align on numerator and denominator. Blended averages hide breakout channels—you should segment afterward even if blended is your first pass.
When to use this calculator
- Before you double down on a channel that logs lots of spend
- When you onboard a new sales motion and need cost per new customer
- When you compare months and want the same definition of “new customer”
- When blended CAC hides a problem child channel and you segment next
Rule of thumb
Blended CAC hides channels that only look cheap because another team subsidized demand.
Terms used in this calculator
- CAC
- Acquisition spend you assign divided by how many fresh paying customers you credit in that same window.
- Conversion rate
- Share of a clear baseline group—visits, sessions, leads—that finished the goal you named.
Calculator
Customer acquisition cost
$419.05
Results are simplified estimates for educational purposes only and should not be treated as financial, accounting, legal, or tax advice. See our disclaimer for details.
Formula
Total acquisition spend ÷ new customers attributed to that spend bucket.
Example calculation
Using the default example values from the JSON seed for this tool:
- S&M cost (period)
- 88000
- New customers
- 210
Result: $419.05 (Customer acquisition cost)
How to interpret this result
Blended acquisition cost per new customer for the period and spend you entered.
Segment by channel before moving budget; blended CAC hides winners and losers.
Align “new customer” definition with finance and analytics.
Common mistakes
- Including customer success fully in S&M when it is retention-heavy.
- Pairing S&M spend from one month with new logos counted in another month.
- Using blended CAC to judge a single channel without segmenting.
What to do next
Compare LTV, payback, and conversion CPA when you blame “expensive” acquisition.
How to improve this result
- Tighten lead-to-close conversion before buying more top-of-funnel clicks.
- Move budget toward channels with repeatable CAC curves, not one-hit wonders.
- Track CAC by segment so blended averages do not hide bleeding geos.
Recommended tools
- Baremetrics SaaS metrics and subscription analytics dashboards.
- ChartMogul Subscription analytics for revenue, churn, and cohort reporting.
- Google Ads Help Official documentation for campaign structure and measurement basics.
- Shopify Commerce platform for building and scaling an online store.
FAQ
- Include salaries?
- If they touch acquisition directly—growth marketers, outbound SDRs—usually yes partially; align internally.
- What counts as "new customer"?
- First-time paying account? Reactivation? Harmonize CRM + finance.
- Why monthly CAC jitters wildly?
- Long sales cycles smoosh closes into random months—investigate cohort smoothing.
- Does this replace LTV math?
- No—CAC without LTV ignores whether you recover spend.
- Partner/channel programs?
- Add partner commissions or rev-share equivalents into numerator.
Related calculators
LTV Calculator (Simple Gross Margin Adjusted)
Simplified annuity-style gross LTV using ARPA, margin, and churn in shared time units.
Open calculator →ROAS Calculator
Attributed revenue ÷ ad spend for the attribution window your team adopts.
Open calculator →Affiliate disclosure
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