Loyal customers are worth their weight in gold: They buy more, stay longer, and recommend you to others. But how can you actually tell how loyal your customers really are?
The DACH Loyalty Report 2026 provides a good indication: 43.4 % of respondents say that a good customer loyalty program makes a company more likable and attractive. But sympathy alone is not a sufficient measure.
In this post, we'll show you three proven categories you can use to build customer loyalty—from repurchase intent to word-of-mouth referrals.
Measuring Customer Loyalty: The Basics
A common mistake is to measure loyalty solely by sales. Yet there are far more meaningful methods. The ultimate measure of loyalty is actually the share a company holds of purchases within an entire category—in the grocery industry, for example, the share of the refrigerator; in the fashion industry, the share of the wardrobe.
However, such data is rarely available at the individual customer level. There are, however, three established categories that can be used to effectively measure loyalty in practice.
Purchasing Behavior understand your customers
Do you actually know what factors influence your customers' purchasing behavior? If you know your customers well, you can help shape their purchasing decisions in a more targeted way.
We show you exactly how to calculate the long-term value of individual customers in: Customer Lifetime Value (CLV): Definition, Formula, Calculation & Measures for Increasing It.
1. Intention to make another purchase
When interacting with customers, you can ask them at any time whether they intend to purchase a product or service again. While their answers aren't a guarantee, they do provide valuable insights into future purchasing behavior.
The easiest way to track this intent is to measure customer satisfaction as part of your regular process—that way, you can analyze both metrics together. This is particularly valuable in industries with long repurchase cycles, where intent can be assessed at any point throughout the customer relationship.
You can find specific metrics on this topic in our article: Measuring Customer Loyalty – An Overview of the Most Important KPIs.
2. Primary Behavior
Depending on the industry, you often have access to transaction data at the customer level. This data can be used to measure five categories that reflect actual repurchase behavior:
- Relevance
- Frequency
- Amount
- Retention
- Longevity
While these metrics do reflect important actual behavior, they are primarily useful as indicators of changes over time—and can sometimes be misleading. A well-known example from the credit card industry: The willingness to pay an annual fee to keep a card increased, while the actual share of total spending—the true measure of loyalty—decreased at the same time.
3. Secondary Behavior
Customer recommendations, endorsements, and word-of-mouth are particularly valuable forms of customer behavior. In most product and service categories, word-of-mouth is one of the most important ways to attract new customers.
Customers often find it easier to answer the question about whether they would recommend a business than the question about whether they would make another purchase. Such soft indicators are nevertheless frequently underestimated—even though they make very effective use of individual customers’ positive experiences.
| Category | Example Metric | Significance |
|---|---|---|
| Intention to Repurchase | Survey on Likelihood of Repeat Purchase | An early indicator, but no guarantee of future performance |
| Primary Behavior | Purchase Frequency, Purchase Amount, Recency | Shows actual behavior; most meaningful when viewed over time |
| Secondary Behavior | Recommendations, word of mouth | A strong indication of genuine satisfaction, difficult to link to purchases |
Customer loyalty should never be underestimated
To succeed in building customer loyalty, you need to be able to measure it. There are various ways to do this. Which one is right for your business depends on purchasing behavior, your industry, and the competition.
It's best to review all the options and select 2 to 3 metrics that are truly relevant to you. That way, you won't lose sight of what's important amid all the data. Before you get started, it's also worth taking a look at The main reasons why customer loyalty programs can fail.
Conclusion: Measure loyalty, not just revenue
Customer loyalty isn’t just reflected in sales figures, but also in intent, behavior, and word-of-mouth recommendations. If you keep all three categories in mind, you’ll understand your customers much better. Choose 2 to 3 relevant metrics—and start tracking them.
FAQ: Frequently Asked Questions About Measuring Customer Loyalty
What is the difference between customer retention and customer loyalty?
Customer retention refers to the measures a company takes to keep customers—such as a loyalty program or good service. Customer loyalty is the result: how loyal customers actually are in the end. Companies actively work to build customer retention and measure customer loyalty as an indicator of the success of these measures.
Is revenue a sufficient measure of customer loyalty?
No, revenue alone doesn't tell the whole story. Purchase intent, actual purchasing behavior, and referrals are more meaningful indicators. Only by combining several metrics can we get a realistic picture of loyalty.
Which metrics indicate primary purchasing behavior?
These include recency, frequency, purchase amount, retention, and the longevity of the customer relationship. They reflect actual behavior but are particularly meaningful when viewed over time. Individual metrics can be misleading when considered in isolation.
Why is word-of-mouth an important indicator of loyalty?
Recommendations and word-of-mouth are among the most important ways to attract new customers. According to the DACH Loyalty Report 2026, 15.9 % are more likely to recommend a company with a loyalty program, and 12.3 % are more likely to talk about it. These soft signals often indicate more genuine satisfaction than mere sales figures.
How many metrics should I use to measure loyalty?
It’s best to select 2 to 3 metrics from the areas of repurchase intent, primary behavior, and secondary behavior. Too much data at once tends to obscure what’s most important. It’s important that the metrics you choose are relevant to your industry and your purchasing behavior.
Is a digital customer loyalty program worth it for measuring loyalty?
Yes: According to the DACH Loyalty Report 2026, 67.31% of companies with a digital customer loyalty program are satisfied or very satisfied with the results. A loyalty app also automatically provides data on purchase frequency, amount, and activity, which makes ongoing measurement much easier.
