Most D2C brands underestimate how much revenue they should be generating from email. The calculation is straightforward and the gap between your current email revenue and your potential email revenue is almost always larger than you expect. Here is the framework for calculating your email revenue potential and building the case for investing in your Klaviyo programme.
The Email Revenue Potential Formula
Email revenue potential = (Active subscribers x Revenue per subscriber per month). Revenue per subscriber per month benchmark: $0.15 to $0.40 per active subscriber for D2C brands with a functioning Klaviyo programme. Active subscribers are those who opened at least one email in the last 90 days.
Example calculation: 15,000 active subscribers at $0.20 per subscriber per month = $3,000 per month from email. If your brand is generating $1,200 per month from email with 15,000 active subscribers, your revenue per subscriber is $0.08. The gap to benchmark ($0.12 per subscriber per month) represents $1,800 per month in unrealised email revenue. Annually, that is $21,600 sitting in your Klaviyo account uncaptured.
Diagnosing the Gap
If your revenue per subscriber is below benchmark, the cause is usually one of three things: flow gaps (missing or underperforming automated flows), campaign frequency below 6 to 8 per month, or list engagement below 25 percent active rate. Run through each: in Klaviyo's flow analytics, check that your abandoned cart, welcome, and post-purchase flows are all active and generating revenue. In your campaign analytics, check whether you are sending enough campaigns and what your average revenue per campaign send is. In your list analytics, check your 90-day active rate.
Building the Case for Klaviyo Investment
Agency or internal resource cost versus expected return: a Klaviyo agency charging $3,000 per month on a list of 15,000 subscribers that is currently generating $1,200 per month from email should be able to move that number to $3,000 to $4,500 per month (the benchmark range for that list size). The ROI at $3,000 increase in monthly revenue against a $3,000 agency cost is breakeven at month one and positive from month two onward. More realistically, the transition takes 90 days to see full benefit, making the ROI positive from month four.
The list growth multiplier: every subscriber you add to a well-performing Klaviyo programme generates $0.20 per month in email revenue indefinitely while they remain active. A pop-up that adds 200 subscribers per month to a well-performing programme adds $40 per month in email revenue per month of subscribers, accumulating to $480 per year from a single month of pop-up conversions. The compounding effect of list growth on a well-performing programme is one of the most significant growth assets a D2C brand can build.