A homeowner who had a stairlift installed two years ago. A family who booked a roof replacement last spring. A client who closed on a house through you a few years back. Every one of them already knows you, already trusted you enough to pay you once, and in most businesses nobody has written to a single one of them since the invoice cleared. That gap, the customers you already won and never speak to again, is where the cheapest work in any business sits unclaimed: repeat jobs and referrals from people who don't need to be convinced twice.
Robert Earl, one of our founders, learned this the hard way years before EMG existed. He sold real estate from 2001 to 2020: in Virginia until 2015, then in Florida. From 2003 to 2007, he held the top position on Google for the search "reston va condos for sale." Then Google changed its algorithm, and instead of local agents, the results started showing large brokerages and Zillow. In his own words: "I learned early on in my career on the internet that we rent the path, but we control and own the list."
That year he pivoted to a newsletter. His repeat and referral business went from about 10 percent of what he did to a consistent 50 to 60 percent, and his business grew, because he kept doing the online work at a lesser degree and supplemented it by working the list. The lesson wasn't that the internet stopped working. It was that anything he didn't own could be taken away in one afternoon, and the list was the one thing that couldn't be.
If you don't know what share of your business already comes from repeat customers and referrals, that's worth finding out before you spend another dollar chasing new ones. Most owners guess higher than the truth, because repeat work feels like word of mouth doing its natural thing, when a lot of the time it's just the customers who happened to remember you on their own.
What does a list of past customers actually do?
A list of past customers does one job: it lets you reach the people who already said yes, on purpose, whenever you have a real reason to. Not a follower count. Not a hope that they'll think of you again unprompted. An actual way to put something in front of them: a reminder when a service is due, a note when you add something they'd genuinely want, the ask for a referral at the moment they're happiest with the work, the check-in a year later that costs you nothing and reminds them you're still there. Every one of those is a job you already know how to do. The list is just what makes doing it possible with more than one customer at a time.
None of that requires marketing software or a background in it. You need an email address, a reason for them to give it to you, and something worth sending once you have it. Building that habit into the work itself, instead of remembering it as an extra step, is most of the foundation.
Why does this matter more for a service business than anyone else?
It matters more for a service business because service businesses are the ones most likely to skip it entirely. The stairlift installer, the roofer, the pool company: almost none of them write to a past customer once the job is done and the check clears. That's not a judgment. It's what happens when the whole day is spent on job sites and phones, and writing to people who already paid you feels like it can wait. It can, right up until you notice the business that does write to them gets the next roof, the next filter change, the next referral, while the business that doesn't is starting from zero with every new customer, forever.
The inquiry that turns into a quote, and the quote that turns into a job, is its own system worth building. The list picks up exactly where that system leaves off: after the job is done, when everyone else stops paying attention.
Every other way you reach people, a following, a partner's referral network, a spot in the search results, works the same way it worked for Robert in 2003: right up until it doesn't, and you find out on someone else's schedule, not yours. We've made the fuller argument elsewhere; the short version is that a follower is borrowed and a list is owned. Past customers are the fastest, cheapest list any business has, because you don't have to earn their attention. You already have it. You just have to keep it.
None of this is about sending constantly or building something you'll resent keeping up with by March. It's about having the address, and using it when you actually have something worth saying. Repeat business and referrals are one of the four jobs that decide whether a business grows or just replaces the customers it loses, and it's usually the one nobody built on purpose.
If you're not sure whether you're actually working your own list, or whether you have one at all, that's worth a plain conversation.
Questions owners ask
Do I still need an email list if I have followers?
Yes, because a following is access a platform lets you borrow, not something you hold. It can change overnight, and it usually changes without warning. A list of past customers is the one channel that stays yours no matter what any platform decides, and it's the fastest one to build, since those people already know you and already said yes once.
How do I get past customers to come back?
Write to them before you need the work, not after you notice business is slow. A reminder when a service is due, a note about something new you offer, or a simple check-in a year later gives a past customer a reason to think of you first. Most of them would come back on their own if you just stayed reachable.
What do I actually send my list?
Send whatever a past customer would actually want to read: a reminder that a service they bought is due again, news about something you now offer that fits them, or a plain ask for a referral right after a job goes well. It doesn't need to be frequent or clever. It needs to be useful and honest, and it needs to actually go out.
What if I have never collected emails?
Start with the customers you already have. Pull whatever contact information sits in your invoices, your job records, or your phone, and ask the next ten customers directly for an email address when the job is finished. You don't need a system built before you start. You need to start, then build the system around what you're already doing.
From the field
The rankings vanished in one algorithm update. The list stayed exactly where it was.