Roshanak Kavian
Co-Founder and CEO of Indigo Mars

Email marketing consistently delivers between $36 and $45 in return for every dollar spent — the highest average return of any marketing channel available, ahead of local SEO, social, and paid ads. For a business already investing in social media and ads, an email list is often the most underused asset already sitting right there in the customer database, quietly capable of outperforming almost everything else being actively paid for.
Why Email Outperforms Everything Else
The core advantage is ownership. A social media following can shrink overnight if a platform's algorithm changes, and a paid ad stops producing the moment the budget stops. An email list is different — it's an owned asset, entirely under your control, unaffected by a platform's shifting rules about who gets shown what. That stability, combined with reaching people who already opted in and therefore already have some real relationship with the business, is what consistently produces returns other channels struggle to match.
A Realistic Example
Consider a small business — a salon, say — sending a single promotional email to 800 subscribers. If it fills forty extra appointments at $60 each, that's $2,400 in revenue from one email, often covering an entire year of email software costs from that single send. This isn't a hypothetical enterprise-scale outcome; it's the kind of result a genuinely small business can realistically produce from a list that size.
How Often to Actually Send
Most small businesses see the best results sending somewhere between one and two emails a week, with some sources suggesting up to four to eight a month works well depending on content quality. Sending less than twice a month risks subscribers forgetting who you are entirely; sending more than three to four times a week tends to increase unsubscribe rates. The right frequency depends partly on how genuinely valuable each email actually is — a business sending real value every time can sustain a higher frequency than one sending filler.
What Realistic Ramp-Up Looks Like
Businesses just starting to take email seriously typically see returns in the 10:1 to 20:1 range before real optimization kicks in — still strong, just not yet at the higher end of the broader benchmark. Reaching the 36:1 range and beyond tends to require real, ongoing attention: segmenting the list rather than sending one identical email to everyone, building simple automation (a welcome sequence for new subscribers, a follow-up after a purchase), and refining based on what the open and click data actually shows over time.
Where to Go From Here
Building an email list works especially well alongside the review-collection habits covered in How to Get More Google Reviews — the same customer touchpoints used to ask for a review are often a natural moment to invite someone onto your list too.
Not sure where to start with email, or how it fits alongside what you're already doing? Get in touch — we'll give you a straight read on whether it's worth prioritizing right now.
