Your email list is the only marketing channel you truly own. Social platforms change their algorithm, paid ads get more expensive every season, and SEO depends on Google. Your contact list, by contrast, is yours: you built it customer by customer and you can write to it whenever you want without asking any platform for permission. That is why it is, consistently, the highest-return channel.
This calculator puts a number on that asset. Adjust your figures above and you will see, in real time, how much email returns to you each month and each year.
How to read the results
- Email revenue per year is the headline figure: what your list generates over twelve months at the rates you entered.
- Jobs/month translates revenue into something tangible: how many jobs you close each month thanks to your sends.
- ROI over the tool compares monthly revenue with what you pay your email provider. A 10x means every dollar of subscription returns ten.
- Revenue/subscriber/year is the metric that really matters long term: how much each contact on your list is worth after a year. Raising this figure is the goal of all email work.
What rates to use if you do not know them
The model chains four rates, so it pays to be realistic in each one:
- Open rate: 21% to 35% is normal in services. Start from the 35% the tool ships with and adjust once you have data from your provider.
- Click rate over opens: 2-5% is realistic. The 3% default is prudent.
- Click to job: this is the real lever. For home-service work, where the ticket is high and intent is strong, 5-10% of interested clicks can turn into a job if the offer fits the customer's moment.
An inflated rate at any of the four steps multiplies the error at the end. Measure two real campaigns before trusting the projection.
Why email wins on ROI
Litmus and the DMA estimate an average return of $36 to $42 per $1 invested. The reason is structural: you do not pay per impression, you talk to people who already know you, and the marginal cost of one more send is effectively zero. For home-service contractors email shines in three uses: maintenance reminders (the furnace, the AC, the annual inspection), seasonal campaigns and reactivating customers who have not called in months.
Building the list with consent (CAN-SPAM)
In the US not just any list will do. CAN-SPAM governs commercial email, and permission-based lists perform far better. In practice:
- Use clear opt-in: the subscriber actively chooses to receive your emails.
- Keep accurate headers and subject lines that do not mislead.
- Include a visible unsubscribe link and a valid postal address in every send.
- Never buy lists or import contacts without permission: it sinks your deliverability and sender reputation on top of the legal exposure.
The honest way to grow is to offer something useful in exchange for the email: a maintenance guide, a discount on the first inspection, seasonal reminders. The list grows slowly but clean, and a clean list outperforms a large cold one many times over.
What to do with the number
If the yearly figure surprised you, the next step is to build the habit of writing to your list regularly. The conversion page explains how to turn contacts into jobs, and the operations page how to systematize reminders without eating your time. To go deeper, read the full guide on email marketing for home-service businesses. When you want to set up the system with your real data, let's talk. And if you are after more tools, here is the full index.