Dr. Paul Borosky, DBA, MBA
Business Consultant · Marketing Glossary
How Do You Build a Customer List for a Small Business?
Social platforms can change the rules overnight. A customer list cannot be taken away. In this guide, Dr. Paul Borosky, DBA, MBA, shares what he tells clients as a business consultant: how to collect contact details with permission, what to store, and how a coffee shop used its list to fill a new location’s first week.
Questions? Call or text (321) 948-9588. Dr. Paul answers personally.
Last Updated: 11/07/2026 · Written by Dr. Paul Borosky, DBA, MBA
The Short Answer
What Is a Customer List?
How to build one: decide what to collect, ask at every checkout, invoice, and event, use a marketing box the customer checks themselves, record permission by channel, keep it all in one system, and send one useful message a month.
Could You Reach Your Customers Tomorrow?
In Plain English
Contact Info for the People Who Already Buy
A customer list is names and contact info for the people who already buy from you, so you can reach them again.
Your customers know how to find you. Do you have a way to find them? Social followers belong to the platform. A list belongs to you.
A Real-World Example
The Coffee Shop That Couldn’t Tell Its Regulars
A coffee shop in Hollywood, Florida has a busy morning crowd and no way to tell its regulars about a new location.
It starts a rewards sign-up that asks for name, email, and birthday month, with a separate, unchecked box for marketing emails. It gains about 100 marketing opt-ins a month, reaching 600 after six months and, at that pace, about 1,200 by year end. A coffee shop business plan with that list behind it has a real retention section.
From Dr. Paul’s Fabled Forest
Louie Waffles and the Guest Scroll
Doctor Owl was at his Sunday stool at the counter when Louie Waffles made an announcement.
“Waffle Woofs will close for a week to fix the ovens,” Louie said. “Don’t worry. Everyone will hear.”
“How?” Doctor Owl asked.
Louie opened his mouth and shut it again. He knew every face in the café. He did not know a single burrow address.
“On the house?” he offered weakly.
Doctor Owl took a small scroll from his satchel and set it on the counter: a line for a name, a line for a burrow, and a box to check for anyone who wanted news from the café.
By the end of the month, Louie had a list. When the ovens came back, every name on it got a note, and the Sunday line was out the door.
From Book 4 of Dr. Paul’s Fabled Forest Business School Series, where every business lesson starts with a story.
Dr. Paul’s Insight
Dr. Paul counts a customer list as one of the most valuable assets a small business can build.
Put It to Work
How to Build a Customer List
- Separate two things. Customer records, which you need to deliver and service orders, and marketing permission, which is consent to promotions.
- Decide what to collect. Name, email or phone, and one useful detail, like birthday month or a favorite item.
- Ask at every touchpoint. Checkout, invoices, your website, and events.
- Use a box the customer checks. Never pre-checked. Record permission by channel: email, text, or mail.
- Store it in one place. An email tool or your point-of-sale system.
- Use it monthly. One useful message, not constant ads.
Permission note: under CAN-SPAM, promotional email and transactional email, like receipts and order updates, are treated differently, and text messages have stricter consent rules. Every marketing message needs an easy unsubscribe. See the FTC’s CAN-SPAM compliance guide.
Watch Out
Pitfalls When Building a Customer List
Buying from you is not the same as agreeing to promotions.
Permission you did not earn hurts trust and can break the rules.
Only ask for what you will actually use.
The fastest way to lose a subscriber is to email every day.
Why It Matters
Benefits of a Customer List
- More chances for repeat sales
- Low-cost marketing
- A list you own, unlike social followers
- It can add to business value
In Your Business Plan
How Customer List Shows Up in a Business Plan
Lenders and buyers value repeat customers. A growing, permission-based list shows the business can bring people back without paying for every visit.
Sample plan excerpt: Marketing Plan, Retention
“The shop collects marketing opt-ins through its rewards program, separate from order records, and sends one email per month. At the current pace of about 100 opt-ins a month, the list is projected to reach about 1,200 contacts by the end of Year 1.”
FAQ
Questions Owners Ask About Customer Lists
How do small businesses collect customer emails?
Is it legal to email customers?
What is the best tool for a small business customer list?
More From the Series
Keep Building Your Business
Every book in Dr. Paul’s Fabled Forest Business School Series teaches one subject through short stories, real terms, and one-page worksheets.
Dr. Paul Borosky, DBA, MBA
Dr. Paul is a business consultant and author with 14+ years of experience and 1,000+ written business plans. He works with owner-run small businesses on plans, financial projections, and the systems that let a business run without the owner doing everything. This page is part of the glossary for Marketing for Small Businesses, Book 4 of Dr. Paul’s Fabled Forest Business School Series.
This page is for general educational purposes only. It is not legal advice. Email and text marketing rules vary and change. Check current FTC guidance and consult a qualified professional before running a marketing program.