Customer relationship marketing (CRM)

Customer relationship marketing is a strategy of building long-term relationships with customers (1) to increase their loyalty, retention and lifetime value (1), rather than focusing only on one-off sales.

One aim of CRM is to increase customer retention — keeping existing customers rather than constantly replacing those who leave. The firm does this by rewarding loyalty and serving customers well, so they keep buying instead of switching to rivals. This matters because retaining a customer is much cheaper than acquiring a new one, so higher retention lowers marketing costs and raises the profit earned from each customer over time.

The first benefit is lower marketing costs through retention. Because keeping an existing customer costs far less than attracting a new one, a business that retains its customers spends less per sale, so each loyal customer earns a higher margin over time. Loyal customers also tend to buy more and more often, raising their lifetime value.

The second benefit is positive word-of-mouth. Satisfied, loyal customers recommend the business to friends and family. These recommendations attract new customers at almost no cost and are more trusted than advertising, so they boost sales while keeping acquisition costs low.

Together, cheaper retention and free recommendations raise profitability — although the business must set these gains against the cost of the systems, training and loyalty rewards CRM requires.

A loyalty scheme is a key CRM method, and for a retailer it brings clear benefits as well as costs.

The main benefit is higher customer retention. By rewarding repeat purchases with points or discounts, the scheme gives shoppers a reason to keep returning rather than switching to a rival. Because retaining a customer is cheaper than acquiring a new one, this raises the profit earned from each shopper over time, lifting their lifetime value. The scheme also generates valuable data: it records what each customer buys, letting the retailer personalise offers and stock the right products, which further increases sales. Loyal, satisfied customers may also recommend the store, attracting new shoppers cheaply.

However, there are costs. The retailer must pay for the technology and database to run the scheme and analyse the data, and train staff to use it. The rewards themselves — discounts or free items — reduce revenue per sale, and the scheme takes time to build a loyal base before it repays its cost. There is also a responsibility to keep customer data secure.

Therefore a loyalty scheme is likely to benefit a retailer because grocery and retail purchases are frequent and repeated, so retention and data quickly add value that outweighs the running costs. The analysis shows the benefits depend on a high rate of repeat purchase — exactly the condition a retailer enjoys.

Investing in CRM offers the business significant benefits. The central one is that retention is cheaper than acquisition: keeping existing customers loyal lowers the cost per sale and raises each customer's lifetime value as they buy more, more often. CRM also generates positive word-of-mouth, bringing new customers cheaply, and produces valuable data that improves products and targeting. Strong relationships are hard for rivals to copy, giving a competitive advantage. For a firm whose customers buy repeatedly, these gains can be substantial.

However, CRM has real costs. It requires technology and database systems, staff training and time to build relationships, and loyalty rewards reduce revenue per sale. These costs come up front, while the benefits build slowly, so CRM can cut short-term profit. For a business selling one-off, low-value products, customers may rarely return, so the cost of CRM could exceed the benefit, and money might be better spent attracting new customers instead.

Judgement. Investing in CRM is worthwhile when the business relies on repeat purchases and customer lifetime value is high — for example a supermarket, subscription service or B2B supplier — because retention and loyalty then generate gains that clearly outweigh the costs. It is less justified for a business selling one-off, low-value items, where customers seldom return and acquisition spending may give a better return. On balance, the decision turns on how likely customers are to buy again: where repeat purchase is high, the firm should invest in CRM; where it is low, it should be cautious. A vague 'CRM is good' answer ignores this condition.

A business can increase profit in many ways — winning new customers, raising prices, cutting costs, launching new products or retaining existing customers through CRM. Whether CRM is the most effective depends on the business and its market.

The case that CRM is the most effective way. CRM raises profit by keeping customers loyal, and retaining a customer is far cheaper than acquiring a new one, so it lowers marketing costs and raises margins. Loyal customers buy more, more often, increasing their lifetime value, and they recommend the firm, bringing new customers almost free. CRM also yields data that improves targeting and products. Because these effects compound over time and are hard for rivals to copy, CRM can deliver a sustained profit improvement that one-off tactics cannot. For firms with frequent repeat purchases, it is often the highest-return strategy.

The case that other methods can be more effective. First, attracting new customers is essential for a growing firm or one entering new markets — CRM cannot grow a customer base that is too small. Second, cost reduction (e.g. economies of scale, efficiency) can lift profit directly and may be quicker than building relationships. Third, new products or higher prices can raise revenue more than retention in some markets. Fourth, CRM has costs (systems, training, rewards) and pays off poorly for one-off, low-value purchases where customers rarely return — so it is not always the best use of funds.

Weighing it up (criterion). CRM is most effective where customers buy repeatedly and lifetime value is high, because retention and loyalty then compound into large, low-cost profit. It is less effective where the firm needs to grow its customer base, where purchases are one-off, or where cost savings or new products offer a bigger, faster gain.

Judgement. CRM is often a highly effective way to raise profit, but not universally the most effective. For businesses built on repeat custom and high lifetime value, it is frequently the best strategy because its benefits compound and resist imitation. For firms needing to grow, selling one-off products, or with large cost-saving opportunities, acquisition, efficiency or innovation may raise profit more. The most defensible conclusion is that CRM is the most effective method for businesses with high repeat purchase and lifetime value, but the 'best' route to profit overall is the one that fits the firm's market and stage of growth — so it cannot be the most effective in every case.