Retention

Retention measures how many visitors or customers return to your website, ecommerce store or service within a certain period of time. The number is expressed as a percentage and indicates which part of your original group remains active. An ecommerce store with 1,000 customers in January and 400 returning customers in February has a 40% retention rate. High retention indicates satisfaction, relevance and loyalty. For SMEs, retention is often more valuable than new acquisition because existing customers buy faster, spend more and require less marketing budget.

How retention is measured and calculated

The basic formula is simple: divide the number of returning users by the total number of users at the beginning of the period, multiply by 100. In Google Analytics you will see this reflected as returning users versus new users. For ecommerce stores, the number of customers making a second purchase is what counts. For SaaS companies, you look at active users per month or quarter. The period you choose depends on your cycle: a coffee shop measures weekly, a mortgage broker annually. The important thing is that you measure consistently and track the same cohort. Increasing retention from 30% to 45% in three months means that your product or service better meets the needs of your target audience.

Why retention has become more important

Acquisition costs through advertising have increased significantly in recent years. According to Google Ads, the average cost per click in the United States is between 1 and 5 euros, depending on the sector. Convincing an existing customer often costs a fraction of that. In addition, competition for attention has increased tremendously. A new visitor converts on average between 1% and 3%, while a returning customer converts up to 60%. Retention ensures predictable sales, lower customer acquisition costs and a more stable cash flow. In practice, we see that SMBs with retention above 50% grow faster and rely less on external advertising budgets.

What retention brings to your business

Higher retention means you need less budget to achieve the same level of revenue. You can focus your SEO strategy and content marketing on deepening rather than just new inflows. Existing customers are also more likely to give feedback, improving your product or service. They refer more often, which ensures organic growth. For an ecommerce store with 10,000 visitors per month and an average order value of 50 euros, an increase from 5% to 10% retention makes a difference of 25,000 euros in additional turnover per year. For service providers such as consultants or agencies, retention ensures long-term partnerships and less time spent on acquisition. Retention is a direct measure of customer satisfaction and product-market fit.

Retention can be used in a variety of ways, depending on your business model and target audience. Most SME companies measure retention at the website level, transaction level or on a subscription basis. Each application requires its own approach and provides different insights. Below are four specific situations where retention makes a difference.

Retention in ecommerce and ecommerce stores

For ecommerce stores, retention is the percentage of customers who make a second, third or fourth purchase. An ecommerce store with 500 unique customers per month and 100 return buyers has a retention rate of 20%. You can improve that percentage through targeted email campaigns, loyalty programs or personalized recommendations. Our projects show that ecommerce stores with a retention rate above 25% often have a clear unique selling point and actively invest in customer service and follow-up. A practical example: a Dutch ecommerce store in sports nutrition sent a personalized email after each purchase with a discount code for a next order within 30 days. Retention increased from 18% to 32% in six months. Measure retention by product category to see where customers are most loyal.

Retention for SaaS and subscriptions

In software-as-a-service and subscription models, retention is crucial for survival. You measure the number of active users who are still paying after a month, quarter or year. A SaaS product with 200 customers in January and 170 active customers in February has a monthly retention rate of 85%. Anything below 80% indicates a problem with onboarding, ease of use or value proposition. In practice, we find that companies with retention above 90% invest heavily in user experience and proactive support. An example from SME practice: a Dutch accounting software increased retention from 78% to 91% by offering each new customer a personalized 30-minute onboarding. The investment paid off in lower churn and higher lifetime value.

Website-level retention and content marketing

Ook voor informatieve websites en blogs is retentie waardevol. Het percentage bezoekers dat terugkomt naar je site geeft aan hoe relevant je content is. Een zakelijke dienstverlener met 2.000 bezoekers per maand en 400 terugkerende bezoekers heeft een retentie van 20%. Dat kun je verbeteren door nieuwsbrieven, notificaties of een sterk contentkalender met vaste publicatiemomenten. Bij MKB-klanten zien we dat bedrijven met een retentie boven de 30% vaak een heldere niche hebben en wekelijks waardevolle content publiceren. Een voorbeeld: een Nederlands adviesbureau in duurzaamheid publiceerde elke dinsdag een praktische checklist. Retentie steeg van 15% naar 38% in vier maanden. Meet dit via Google Analytics onder Audience, Behavior, New vs Returning.

When retention is the right focus and when it is not

Retention makes sense if you already have a working product or service and sufficient inflow of new customers. If you are still in the start-up phase and have less than 100 customers, acquisition is more important. Also, if your product is seasonal, such as a garden center, it's better to measure retention on an annual basis rather than a monthly basis. Retention is not a goal in itself: an ecommerce store with 10 customers and 100% retention will not grow. Focus first on a well-functioning ecommerce store and sufficient traffic. Only then optimize your retention through improvements in service, product and communication. When your retention is below 10%, first solve fundamental problems such as an unclear value proposition, poor onboarding or too high prices.