Churn: The Leak Under Every Recurring Business

Short Answer: Churn is the share of your recurring customers who leave over a period. Divide the customers lost during the period by the customers you had at the start. If you start the year with 15 contracts and lose 5, your yearly churn is 33%. The number matters because it also tells you how long the average customer stays (one divided by churn) and how much new selling you need just to stand still.

Recurring revenue is the steadiest money a small business earns: the same clients, paying the same amount, month after month. It feels safe, which is what makes churn dangerous. A lost contract makes the business slightly smaller every month after, and the owner often doesn't notice until the winter.

What Is Churn?

Churn is the rate at which recurring customers stop buying from you. It applies to any business with customers who pay on a schedule: maintenance contracts, retainers, memberships, subscriptions, weekly service routes.

Churn rate = customers lost during the period ÷ customers at the start of the period

Count only customers who were there at the start. New customers won during the year, and then lost, make the number messy; track them separately.

A Worked Example: Greenline's Commercial Contracts

Take a hypothetical landscaping company, Greenline Landscaping: one owner, a crew of four, about $520,000 a year in revenue. Its recurring revenue is its commercial maintenance contracts, about 15 of them, roughly 35% of revenue. Each contract is billed $1,800 a month from April through October and costs $1,080 a month to service, leaving $720 of contribution (price minus the direct cost of delivering it) toward overhead and profit.

Here is one year of contracts:

Churn is 5 ÷ 15 = 33% a year, or about 3% a month. The team won three new contracts, which took bids, site visits and follow-up, and still ended the year with fewer than it started.

What Does Churn Actually Cost?

Put a dollar value on each contract and the leak gets easier to see. Over its seven billed months, one contract is worth $12,600 a year in revenue and $5,040 a year in contribution.

Five lost contracts take away $25,200 of contribution a year, about 22% of Greenline's $114,000 profit before owner pay. Most of it was replaced. The part that wasn't is $10,080 a year, and it can grow: commercial clients who leave usually take their winter snow removal and cleanups with them, and that work is what keeps Greenline going from November to March.

How Long Does the Average Customer Stay?

Churn also tells you the average customer's life with you:

Average customer life = 1 ÷ churn rate

At 33% a year, the average Greenline contract lasts three years. That makes each contract worth about 7 billed months × $720 × 3 years = $15,120 in contribution over its life.

Now picture a year where Greenline loses two contracts instead of five. Churn drops to 13%, the average contract lasts about seven and a half years, and with the same three wins the business ends the year with 16 contracts instead of 13. The difference, three contracts, is $15,120 of contribution a year, with no extra advertising.

Why Do Recurring Customers Leave?

For a service business the reasons tend to be concrete:

• A missed or sloppy visit, especially one the client noticed before you did.
• A price that jumped without warning. Increases at renewal, with notice and a reason, go down far better than a surprise on an invoice.
• A rebid. Many commercial clients put contracts out to bid every year or two. If you don't know the date, a competitor does.
• Changes on their side: a new property manager, a sale, a budget cut.

Only the last one is out of your hands, and even then, a relationship with the new decision maker before the renewal date gives you a chance.

What to Look For

• Churn by customer type. Commercial and residential customers leave for different reasons and at different rates. A single blended number hides both.
• Renewal dates. Keep a list of every contract's renewal or rebid date. Calls made 60 to 90 days before the date save more contracts than calls made after a cancellation.
• Early warnings. Complaints, a client who starts paying late, or a new contact on their side are the signals that most often come before a cancellation.

What a Finance Consultant Would Do Next

A consultant looking at Greenline's year would start with the five lost contracts. They would find out why each client left, put every renewal date on a calendar, and compare the cost of keeping a contract (a price hold, an extra service visit) with the $5,040 a year each one contributes. Then they'd test what next year looks like at 13 contracts, 15 and 17.

That analysis is what Occam's Model runs on your own books. It shows each revenue stream, including your recurring contracts, on its own line from revenue down to cash, and lets you test the effect of losing or winning customers on a copy of your business before it happens. When you need extra help, an expert can review it with you.

Common Questions

What is a good churn rate for a small business?
It depends on the kind of business and the contract. For clients on yearly contracts, fewer than one in five leaving each year is a reasonable goal for many service businesses. Compare yourself with your own last year first.

Should I measure churn monthly or yearly?
Match it to how customers pay and renew. Monthly payers can be counted monthly; yearly contracts are best counted yearly, since cancellations cluster around renewal dates.

Is it cheaper to keep a customer or win a new one?
Usually keeping. A retained customer costs no ads and no bid, and they already know how you work. To check, compare what it takes to keep a client with what the client contributes each year.

Does churn apply to seasonal customers?
Yes. For a seasonal business, count the customers from last season who didn't come back this season. That's the churn rate that sets how much of your spring marketing goes to replacing customers rather than growing.