Churn—it's the bane of every SaaS company. No single metric creates more anxiety and lost sleep among software founders and product teams than their product's churn rate.

And rightly so. High customer attrition is a pretty solid indicator that something in your business is failing—not just your revenue. What may seem like a small, insignificant increase in churn can quickly cut your revenue and valuation in half. SaaS churn is nothing to scoff at or ignore.

High churn rates are never something to celebrate … But is all SaaS churn bad? Or at least, as bad as it's cut out to be? Not necessarily. While it never feels good to lose a customer, of course, sometimes it makes sense for both your business and the churned customer — and you can learn something about your business to make things even better for your existing customers.

In this guide, we cover the different churn rates to measure and some of the situations where churn doesn’t have to cause you so much anxiety.

What is SaaS churn?

SaaS churn is a measure of how many customers stop doing business with or purchasing from your software company over a specific time period compared to the company’s total number of customers. Founders, executives, product teams, and customer success teams are normally most focused on churn rates.

You can calculate this with the following churn rate formula:

Churn rate = (# of churned customers in a period ÷ total # of customers to start period) × 100

What a “good” churn rate is depends on your business model and industry, your company revenue, and how your team measures churn. What churn looks like is different from B2B to B2C, industry to industry, and big companies to smaller companies.

Much like any SaaS metric, you can measure and track churn as often as you’d like; it’s most commonly measured with a monthly churn rate and annual churn rate.

Customer churn rate vs. revenue churn rate

Churn rate is measured in many different ways, but there are 2 basic formulas:

1. Customer churn rate: the ratio of how many customers or subscribers are terminating business with you to your total customer count (existing customers and new customers)
2. Revenue churn rate: the ratio of lost revenue from departing customers to overall revenue (from existing customers and new customers)

Both revenue churn and customer churn are vital metrics for tracking the overall health of your business.

But focusing on one metric while ignoring the other can effectively disguise imminent business problems. Revenue churn rates and customer churn rates go hand in hand. Your monthly recurring revenue (MRR) and annual recurring revenue (ARR) are a direct result of your total customers, how much they spend with your company, and their overall customer experience.

To muddy the waters even further, many PMs and founders hold different opinions about how churn should be addressed.

Some accept churn as an inevitable cost of doing business, setting “background SaaS churn” metrics and benchmarks over a given time period to guide future growth decisions. These businesses often focus on improving things for existing customers, versus spending the money and time to acquire new customers.

Others consider all revenue churn and customer churn to be preventable, working to retain customers even when it may not be cost-effective for the business.

Customers and subscribers are the lifeblood of every SaaS business, and every customer who decides to stop using your product feels a little like a punch to the gut. Saying goodbye to a customer never gets easier. But the reasons behind a high customer churn rate can vary significantly, and the truth is that many of those reasons are outside of your control. Sometimes, churn isn't even a bad thing at all.

5 types of customer churn and revenue churn that aren’t so bad to have

Not all churn is equally bad for your business.

Every time a customer makes the decision to leave your product, they're making a statement—telling you something about your product, your service, or your brand.

Great founders and product managers should be constantly gathering information on how to improve their products and services—plus customer satisfaction and retention—and they shouldn’t overlook churn rate as a crucial source of information. Every customer churned is an opportunity to understand how you can create a better product.

Here are 5 types of churn that can actually help your company in the long run, so long as you take the time to learn from them:

1. Churn that weeds out bad-fit customers

When your customer support team breathes a sigh of relief after hearing a particular customer has churned, it's a good sign they were not a great fit for your business.

It's easy to assume new customers will always be a good fit for your product. After all, they must understand what they're looking for if they signed up, right? But many customers don't fully understand their own needs during purchase and onboarding, which can lead to bad fits absorbing large amounts of support time and energy as they try to adapt the product to fit their very specific needs.

The business cost of bringing on too many bad-fit customers will often outweigh the benefits and revenue these customers provide. Disqualifying bad-fit leads early on can lower your overall customer acquisition costs while also increasing the average customer lifetime value across the remaining current customers who are a good fit for your product.

The flip side of losing a bad-fit customer, of course, is learning more about who your best customers are. By segmenting customers who aren't a great fit, you can begin to understand how much burden each segment adds to your customer-facing teams, slowly building a more accurate profile of your ideal customers.

You can't be all things to all people; when you have a truly bad-fit customer on your hands, the solution is simple. Let them churn.

2. Churn from customers with short-term needs

No customer wakes up in the morning and decides to leave your product out of the blue. Instead, the seeds of churn are often sown long before new customers even sign up for your product.

Frequently, customers will sign up knowing they'll only need your product for a short period of time.

For example, they may be working on a client project with a short deadline, and they only need one month to complete the project. These customers essentially make the decision to churn the moment they create an account — they're likely to churn no matter what.

This type of churn is a great opportunity to learn more about your customers' needs. If you discover that a large number of customers are churning after only a short time, an exit survey is a great opportunity to find out what their needs truly are and how those might differ from your assumptions. You may learn that a short-term plan, a more extensive product trial, or a simpler version of your product will better meet the needs of those customers.

This is a great example of why the definition of churn rate—and what a good churn rate is—differs so much from business to business. For example, if your company regularly has a customer segment that needs your product for only a short period of time, a higher churn rate is to be expected.

3. Churn from unsustainable growth

It's easy for companies to juice their top-line metrics by pouring more funds into their marketing and sales channels — but it's an approach that doesn't lead to sustainable business growth.

Yes, you will have more customers, but many of them will not be a great fit for your product or have no desire to stick with your product for the long haul. In fact, bringing on more customers can often overwhelm your customer-facing teams, leading to unsatisfied customers, an increase in overall churn, and a decrease in customer retention rate — precisely the opposite of what you're trying to achieve.

Take Zenefits, for example. Once a darling of Silicon Valley, the employee-benefits company cut 45% of its workforce in 2017 — nearly 430 employees — after growing too quickly. In a letter to employees, Zenefits CEO Jay Fulcher blamed the layoffs on their rapid growth rate:

“In 2015, Zenefits grew too quickly, hiring employees to support revenue projections that far surpass where we are today. Today’s action aligns our costs more closely to our business realities and gives us the runway we need to build the business properly for the long term.”

While an increase in churn following rapid growth isn't good, it does tell you that your growth is hurting the other parts of your business, like customer support and customer success.

Bringing in customers at a rapid pace is only worthwhile if you have systems in place to retain those customers at the same rate. Pouring money into customer acquisition at increasing costs might result in short-term gains, but many of those new customers will churn quickly, making the growth unsustainable.

4. Churn between owned brands

Occasionally, you might come across a “roll-up company” that purchases and operates multiple software companies aimed at serving a particular vertical.

Those companies frequently manage products with overlapping feature sets, some of which may be seen as competitors from the customers' perspective. If a customer leaves your product for a competing product — but you also own the competing product — the net loss is zero, making churn a nonissue.

For many SaaS companies, this category of churn tends to be uncommon. If you do happen to experience this type of churn, take it as a great sign that one of your products or brands is stronger than the others — talking with customers can help you understand why and help you discover ways to improve the overall strength of each product in your portfolio.

5. Churn in transient markets

If you're operating in a large, transient market, your customers will naturally come and go over time. That means some background level of churn is unavoidable and should be managed accordingly.

This occurs most frequently in B2C and eCommerce companies, since they tend to aim at a much wider customer base. Blue Apron, for example, has a much higher churn rate than what would be considered acceptable for a B2B software company, with some experts estimating that 72% of customers will churn within the first 6 months due to pricing, personal need, and other factors.

While some of that churn could definitely be prevented, much of it occurs naturally as customer needs change — people relocate, they start shopping at the grocery store instead of getting ingredients delivered, their financial situation changes, etc.

This kind of churn is much less common in the B2B space. Business needs are much more steady than consumer desires, and companies tend to spend more time making educated purchasing decisions. Exit surveys and customer-focused cancellation flows can provide valuable insight into how much unavoidable churn you should expect and can help you consider other areas of the business, outside of customer retention, that you could improve.

A high churn rate is never a good thing

Even in the 5 scenarios above, too much churn is never a good thing. Subscription-based businesses simply can't survive if churn is too high.

SaaS companies are faced with a dilemma. Simply accepting churn as an inevitable part of doing business can cause you to stop searching for ways to mitigate churn, preventing your business from reaching its full potential. On the other hand, trying to eliminate churn entirely can be a massive resource drain for your company. There will always be some level of churn that cannot be prevented.

The best path forward, then, is to strike a balance by focusing on slowly improving churn. As bad-fit customers churn out and your product matures, your ratio of good-fit customers — and even loyal customers — should improve, along with your overall churn rate.

To improve your churn rate, you have to improve your product. The best way to do this is to learn where and why your customers are leaving in the first place. This is exactly why the churn rate you hate is actually an opportunity, not a burden. It can help you identify moments of frustration within your product — places where your product may not be meeting user needs.

Once you've figured out where your product can be better, you start improving your product in the places that actually matter. That isn't just churn prevention — it's part of creating a better user and customer experience.

Now stop panicking about your churn rate and get some sleep!