Customer retention

More traffic from SEO and advertising and a higher conversion rate on your website can bring in leads and sales, and with them new customers.

But keeping existing customers is often more profitable than winning new ones.

According to a widely cited estimate in Harvard Business Review, acquiring a new customer costs 5 to 25 times more than keeping an existing one, depending on the industry and the study. Existing customers tend to buy more often, spend more and need less marketing than new ones.

Customer retention is the work of spotting the risk of churn, understanding why customers leave and actively keeping them. Customers are grouped by behaviour, and each group gets its own message at the time that suits it. The goal is long-term relationships rather than one-off transactions.

Why customer retention matters

It costs less than winning new customers

Acquiring a new customer is expensive.

Result: Investing in keeping customers can give a better return, especially when customer acquisition is expensive.

Customers who stay deliver a higher lifetime value (LTV)

A customer who stays longer is worth more.

Example (subscription service)

Customer A

Subscribes for 3 months, pays SEK 300 a month = SEK 900 LTV

Customer B

Subscribes for 24 months, pays SEK 300 a month = SEK 7,200 LTV

Customer B is worth eight times as much.

In every industry: The longer a customer stays, the higher the total revenue. Less churn raises the average LTV.

Existing customers buy more

Growing trust leads to larger purchases.

Existing customers recommend you

Satisfied long-term customers become ambassadors.

Result: Satisfied customers bring organic growth and a lower cost of winning new customers (CAC, Customer Acquisition Cost).

Revenue becomes easier to predict

New customer acquisition fluctuates

some months bring many new customers, others fewer. The outcome is hard to predict.

Retention brings stability

high, steady retention makes revenue easier to plan. If 95 per cent of customers stay each month and no new customers join, 54 per cent remain after a year.

For the company

Planning becomes simpler, cash flow improves and risk falls.

How customer retention differs between industries

Subscription services

Examples

Streaming sites, SaaS, media subscriptions, gyms

Challenge

Customers can cancel at any time. A high churn rate weakens the business.

Insurance and finance

Examples

Insurance companies, banks, mortgage lenders

Challenge

Customers pay annual premiums or have long-term loans. A customer can switch at renewal or when a competitor offers better terms.

E-commerce and consumables

Examples

Shops selling consumables, fashion, consumer electronics

Challenge

Customers are not tied in. They can shop with a competitor next time.

Goal: Turn one-off buyers into repeat customers.

B2B services

Examples

Consultancies, agencies, SaaS for businesses

Challenge

Contracts expire. Customers can choose not to renew or switch supplier.

Goal: Long-term partnerships, not project-based relationships.

Why customers leave

The product or service is poor

Problem: The product does not live up to expectations or does not solve the customer’s problem.

Solution: Improve the product or service.

Customer service falls short

Problem: Customers do not get help when they need it, or the experience is frustrating.

Result

Customers leave even if the product is good.

Solution

Invest in customer service. Fast, helpful, empathetic support builds loyalty.

A competitor offers better terms

Problem: The price, features or service are better at a competitor.

Life events make the product unnecessary

Problem: The customer’s situation changes so that the product is no longer needed.

Solution: This kind of churn is hard to prevent. Sometimes the company can get ahead of it by offering alternative products or services.

The customer forgets about the company

Problem: The customer does not actively use the product or service and forgets it exists.

Solution: Stay in touch. Remind the customer of the value. Run campaigns that rekindle their interest.

The company does not get in touch

Problem

The company keeps no contact between purchase and renewal. The customer feels forgotten.

Result

When it is time to renew, the relationship has gone cold and the customer considers alternatives.

Solution

Keep in regular contact with newsletters, updates and personal messages.

Identify at-risk customers

These behavioural signals warn of churn

Certain behaviours point to an increased risk of churn.

Reduced use or activity

Warning: The customer no longer gets value from the product, and there is a risk they will cancel.

Warning: The customer is now shopping elsewhere.

Contacts support often (with complaints)

Problem

Recurring problems that are not resolved cause frustration.

Warning

If the problems are not fixed, the customer will soon leave.

Visits the pricing page or the cancellation page

Problem

The customer is comparing alternatives.

Warning

The customer is actively considering switching.

No response to communication

Problem

The customer does not open emails, answer surveys or engage.

Warning

The customer has lost interest or has already left mentally.

When the risk of churn rises

Natural break points

Data that identifies risk

RFM analysis (Recency, Frequency, Monetary)

Recency: When did the customer last buy or use the product?
Frequency: How often does the customer buy or use it?
Monetary: How much does the customer spend?

Segmentation

RFM shows activity and value, and says only indirectly how likely a customer is to leave. So combine RFM with risk scores and prioritise using a risk and value matrix, putting the most effort into customers with high risk and high value.

Three tools do the work: churn analysis, segmentation and a channel matrix

1. Churn analysis

A systematic analysis of which customers leave and why.

Use: Understand the problem before you introduce solutions.

Read more about churn analysis →

2. Audience segmentation

Divide the customer base into meaningful segments by behaviour, risk and value.

Use: Tailor the message to each audience. Not every customer needs the same communication.

Read more about audience segmentation →

3. Channel matrix

Plan which communication each segment should receive and in which channels.

Use: Turn the strategy into communication that reaches customers.

Read more about the channel matrix →

Strategies for keeping customers

Proactive communication

Problem

The company only contacts customers about invoices or renewals.

Solution

Ongoing communication that adds value.

Result: The customer feels valued, not just like a source of revenue.

Loyalty programmes

Result: Customers have a reason to stay, because they lose benefits if they leave (a switching cost).

Personalisation

Problem

Generic communication feels irrelevant.

Solution

Tailor it to the customer’s behaviour and preferences.

Result: Higher engagement, and customers feel the company understands them.

Anticipate problems

Proactive support: Identify potential problems before the customer runs into them.

Result: The customer feels looked after, and problems are solved before they cause frustration.

How to win back customers who have stopped

For inactive customers: Try to win back those who have stopped using the product or service.

Timing

After 30-90 days of inactivity (depending on the industry).

Realistically

Winning customers back succeeds less often than preventive work, but it is still worth trying.

How to track retention with KPIs

How to calculate the churn rate

Formula: Churn rate = (Customers lost during the period ÷ Total customers at the start of the period) × 100

Goal: Reduce the churn rate over time.

How to calculate the retention rate

Formula: Retention rate = ((Customers at the end of the period − New customers during the period) ÷ Customers at the start of the period) × 100

Goal: Set a monthly or annual target based on your industry and past results.

How to calculate customer lifetime value (LTV)

Formula (simple): LTV = Average purchase value × Average purchase frequency × Average customer lifespan. Ideally, calculate on contribution margin rather than revenue, so that LTV shows profitability.

Goal: Increase LTV by extending customer lifespan (retention), raising purchase value (upselling) or both.

How to measure loyalty with Net Promoter Score (NPS)

Question: “How likely are you to recommend us to a friend or colleague?” (0-10)

NPS = % Promoters − % Detractors

Follow-up

Compare NPS with your own trend and with your industry.

Use

Detractors may have a higher risk of churn. Prioritise your efforts by risk and value.

How to measure engagement with scores

Scoring: Give points for each activity. Add them up into an engagement score.

Action: Target campaigns at customers with low engagement.

How to move from reactive to proactive retention

Reactive retention

The company waits until the customer cancels and then tries to persuade them to stay.

Problem

By then it is too late, because the customer has already made up their mind.

Proactive retention

The company identifies the risk before the customer decides to leave and acts early.

Process

Contact us about customer retention

Carnaby helps companies build systematic customer retention strategies, from churn analysis and segmentation to automated communication campaigns that reduce churn.

Contact us →