Customer retention report: what the research says about repeat business

Customer retention statistics show that customers who stay tend to become more profitable over time, and that the reasons they leave are usually fixable: poor communication, surprise costs and experiences that feel generic. The strongest numbers come from a handful of original studies, and several of the most quoted figures are narrower than the way they get repeated.

This report compiles five sources. Bain & Company's work by Fred Reichheld on retention economics. Ipsos on the limits of that research. Cox Automotive's 2025 Service Industry Study. AppFolio's 2025 Renter Preferences Report, as covered by Multifamily Executive. Twilio's 2025 State of Customer Engagement Report. Together they cover the economics of keeping a customer and the specific behaviors that keep one.

The figure traces to Frederick Reichheld and W. Earl Sasser, Jr., whose 1990 Harvard Business Review article, "Zero Defections: Quality Comes to Services," argued that services should measure customer defections the way manufacturers measure defects. Ipsos quotes the article's claim directly: "by reducing customer defection by a mere 5%, companies can boost profits by 25% to 85%."

Reichheld restated it more narrowly in a 2001 Bain brief, "Prescription for Cutting Costs": "In financial services, for example, a 5% increase in customer retention produces more than a 25% increase in profit." The 95% upper figure that appears in many blog posts does not appear in that brief. The same brief makes two points that matter more for most service businesses. It says many firms waste half their marketing spend on customers who leave before paying back what it cost to win them, and it notes that return customers refer others.

The practical reading: retention gains were measured in industries with high acquisition costs and long relationships, such as banking and insurance. A service business with similar economics (a law firm with repeat corporate clients, an accounting practice with annual returns, a property manager with multi-year owner contracts) is closer to that model than a business with one-time jobs.

Ipsos published a critique of common loyalty beliefs that is worth reading before you build a retention budget around one statistic. Its main points:

• Profit is more skewed than revenue. Ipsos cites activity-based costing research finding the most profitable 20% of customers contribute 150% to 300% of total profit, while the least profitable 20% reduce it by 50% to 200%.
• Keeping everyone is not the goal. Without knowing which customers are profitable, a business can spend to keep the wrong ones and let valuable ones leave.
• Returns diminish. Past a certain point, preventing one more defection costs more than it is worth.
• Loyalty programs do not fix a weak service. Ipsos describes a grocery retailer whose card members bought no more, and shopped no more often, than non-members.

Customers leave a service provider mostly over communication and surprises, according to the industry data in this report. Cox Automotive's 2025 Service Industry Study surveyed 1,974 vehicle owners who had serviced a car in the past 12 months. It found 45% were dissatisfied with their dealership service experience, mainly because of unexpected costs and poor communication.

The loss shows up in the numbers. Cox found dealerships handle 12% fewer service visits than in 2018, even though total service visits have risen. Among owners of cars two years old or newer, 54% returned to the selling dealership for service in 2025, down from 72% in 2023. Price was not the clear reason: Cox reports the average dealership repair cost $261 in 2025, compared with $275 at general repair shops. What owners said they want is transparent pricing, easy scheduling and flexible service options, and 55% said it is very important to compare costs online.

Twilio's 2025 report, based on 7,640 consumers in 18 countries, found 71% of consumers will walk away from a purchase if the experience does not feel relevant. It also found a gap between how businesses see themselves and how customers see them: 83% of business leaders said they deeply understand their customers, while 45% of consumers said they feel understood by brands.

Satisfaction with the people and the communication keeps customers coming back, and it is measurable. AppFolio's 2025 Renter Preferences Report surveyed 2,002 U.S. renters. Multifamily Executive reported these findings:

• Renters satisfied with their property manager are 73% more likely to renew their lease and more than five times as likely to recommend that manager.
• Renters satisfied with maintenance are 71% more likely to renew.
• 86% of renters satisfied with maintenance were also satisfied with their property manager.
• Renters satisfied with communication are 79% more likely to be satisfied with their property manager and 146% more likely to recommend them.

Yes. In the sources reviewed, retained customers bring revenue beyond the repeat visit, through larger later purchases and referrals. Cox Automotive found that owners who service at a dealership are 74% more likely to buy their next car from that same dealership. Bain's 2001 brief notes that repeat customers tend to spend more over time and that return customers refer others to the business.

Cox also found a missed opportunity that applies well outside auto: more than half of owners facing a major repair may consider trading in their car, yet few are offered an appraisal during the service visit. Many service businesses have the same blind spot. A salon client who books color every eight weeks, a dental patient due for a crown, or a tax client whose business just added employees may each need a bigger service, and nobody asks.

The table below lists the main figures in this report, with the population each one was measured on.

The research supports investing in retention, with two conditions: know which customers are worth keeping, and fix the specific moments where people decide to leave. Across these studies, those moments are about communication, price surprises and how easy it is to book again.

Practical steps that follow from the data:

• Measure retention before you try to improve it. Track how many customers from a given period came back within your normal service cycle (90 days for a salon, 12 months for a tax practice or annual HVAC service).
• Rank customers by profit, not just revenue. Ipsos's point about skewed profitability means a short list of clients may carry most of your margin.
• Remove price surprises. Cox found unexpected costs were a main reason for dissatisfaction. Written estimates, approval before extra work and clear fee policies address this directly.
• Make communication predictable. AppFolio's renter data shows communication satisfaction strongly tied to overall satisfaction. Set response standards for messages and status updates, and keep them.
• Make rebooking easy. Cox owners asked for easy scheduling and after-hours options. Online booking, reminders and a prompt to schedule the next visit before the customer leaves all support this.
• Ask about the next need. A retained customer is the easiest person to offer a larger service, as the Cox trade-in finding shows.

Track retention with a few numbers you can pull from your booking system or CRM: repeat rate within your service cycle, average time between visits, share of revenue from returning customers, and the number of customers who have gone quiet past their usual return date. Review them alongside new-customer numbers so the team sees both sides of growth.

Monvell's Communications and Data + Reporting work covers this ground: setting up rebooking reminders and win-back messages, and building a dashboard that shows repeat rate next to new-customer volume.