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Practitioner · Course 4: Customer Data, CRM and Loyalty · Lesson 3 of 5

Calculating the value of a repeat customer against the cost of acquiring a new one

Level: PractitionerTime: 50 minutesOrder used: A (the T-shirt, Cedar & Co.'s own domestic equivalent style)Tool: Customer data and loyalty worksheet
For a domestic retail buyer deciding how much a repeat customer is actually worth, against how much it costs to win a brand-new one. Lessons 4.1 and 4.2 are useful preparation, though not required. Figures are teaching figures.
RetailerCedar & Co. (12 shops, domestic)
FactoryDelta Garments
ProductCedar & Co.'s own style, equivalent in value to Order A
Construction180 GSM single jersey, Ne 30/1 combed cotton
Selling priceUSD 19.90 per piece, USD 8.00 cost
Business modelMake to Stock, domestic, reordered on a forecast cycle
02Opening

This page teaches a domestic retail buyer how to calculate what a repeat customer is actually worth, and compare it against what it costs to win a brand-new customer

This page teaches how to weigh a repeat customer's own value against the cost of acquiring a new one, for a domestic retail buyer, a brand-side contact, or anyone deciding how much of a budget to spend keeping existing customers rather than finding new ones. This lesson mainly teaches the money flow: it calculates the profit a repeat customer is worth over several years of continued buying, and sets that figure against the marketing cost of winning one new customer. A buyer who only ever counts the cost of a single sale can badly underestimate what keeping a customer buying year after year is actually worth to the business, and can spend a marketing budget in the wrong place as a result.

03Before you start

You need: an understanding of purchase-behaviour segments, covered in Lesson 4.2, and a retailer's own figures for average annual spend per customer and marketing cost per new customer won.

By the end of this lesson you can:

  • calculate a repeat customer's own value over a stated number of years of continued buying;
  • state the cost of acquiring one new customer, from a retailer's own marketing spend and result;
  • compare a repeat customer's own value against the cost of acquiring a new one;
  • decide whether a proposed spending plan is weighted sensibly between keeping existing customers and winning new ones.

Not covered here: which customer data fields a loyalty programme actually needs (Lesson 1), segmenting customers by real purchase behaviour (Lesson 2), deciding whether a reward actually changes behaviour (Lesson 4), and building a complete customer data and loyalty worksheet (Lesson 5).

04Key terms

Words you will meet in this lesson

TermMeaning
Repeat-customer valueThe total profit a retailer earns from one customer's continued buying over a stated number of years, not just from a single sale.
Customer acquisition costThe average marketing spend a retailer must make to win one new customer, calculated from total marketing spend divided by new customers won.
Annual spend per customerThe average amount one customer spends with a retailer over one year, used to build up a repeat customer's own value.
Retention periodThe number of years a retailer expects an average customer to keep buying from it, used to calculate value over more than one year.
Marketing spendMoney a retailer spends specifically to attract new customers or encourage existing ones to buy again.
Break-even comparisonChecking whether a repeat customer's own value covers, or exceeds, the cost of acquiring a new customer, before deciding where to spend a budget.
05Teaching
The rule

A repeat customer's own value is built from profit over several years of continued buying, and should be compared against the cost of acquiring one new customer before a retailer decides where to spend

A single sale tells a retailer very little about what a customer is worth to the business overall. Repeat-customer value multiplies a customer's own annual spend, converted to profit, by the number of years the retailer expects that customer to keep buying, giving a multi-year figure. Customer acquisition cost is the average marketing spend needed to win one new customer. Comparing the two tells a retailer whether it is more valuable to spend a budget keeping an existing customer buying, or finding a brand-new one, rather than assuming one is always cheaper than the other.

Repeat customer, several yearsYear 1 profitYear 2 profitYear 3 profitNew customer, one-time costAcquisition marketing spend
A repeat customer's own value builds up over several years; a new customer's cost is a single, one-time spend. Comparing the multi-year figure on the left against the one-time figure on the right is the comparison this lesson teaches, not comparing a single year of spend against a single year of value.
What you meet in real life

How repeat-customer value compares to acquisition cost differs by market, business model and how a retailer sells

What can differThe shapes you meetWhy it matters
Domestic MTS/hybrid retailer vs. export MTO retailerA domestic Make to Stock retailer such as Cedar & Co. sees the same shop customer return across many separate visits over several years; an export Made to Order retailer such as Fairway Stores mostly repeats at the level of a wholesale buyer account, not an individual shop customerRepeat-customer value applies most directly to a retailer that sees the same named or identifiable customer return; a wholesale account's own repeat value is closer to Lesson 4.2's account segmentation
High retention, low annual spendSome retailers keep customers for many years, each spending a modest amount per yearA long retention period can make a modest annual spend add up to a large multi-year value, worth more attention than the yearly figure alone suggests
Low retention, high annual spendOther retailers see customers spend a large amount per visit but rarely returnA single large sale can look attractive without being worth as much, over time, as a smaller but more loyal repeat customer
Acquisition cost rising over timeA retailer's own cost to win one new customer can rise as a market becomes more competitive, even while repeat-customer value stays the sameA rising acquisition cost makes retaining existing customers relatively more valuable, without the retailer's own retention economics needing to change at all
Product familiesThe same comparison, repeat-customer value against acquisition cost, applies whether the retailer sells apparel, socks and hosiery, knit-to-garment, terry and towels, or home textiles and beddingA retailer new to this comparison should build it from its own real annual spend and acquisition figures, not assume another product family's figures apply
The case we follow

Cedar & Co. compares the three-year value of a repeat customer against its own cost of acquiring one new customer

Cedar & Co., a domestic brand with 12 shops, sells a style equivalent in value to Order A at USD 19.90 per piece, bought from Delta Garments at USD 8.00 per piece, a profit of USD 11.90 per piece. Cedar & Co.'s own records show an average repeat customer buys 6 pieces a year across its range and typically keeps shopping with Cedar & Co. for 3 years before moving on or lapsing. Cedar & Co.'s own marketing team spent USD 24,000 last quarter on a campaign that won 80 new customers.

Omar, the owner, wants to know whether Cedar & Co.'s own repeat customers are worth more or less than what it costs to win a new one, before deciding whether to shift more of the marketing budget toward retention.

The worked number

A repeat customer is worth USD 214.20 to Cedar & Co. over three years, more than seven times its own USD 300 cost of acquiring one new customer

Annual profit per repeat customer = 6 pieces × 11.90 = USD 71.40
Repeat-customer value over 3 years = 71.40 × 3 = USD 214.20
Customer acquisition cost = 24,000 ÷ 80 = USD 300

Cedar & Co.'s own repeat-customer value of USD 214.20 over three years is smaller in a single comparison than its own USD 300 acquisition cost, the opposite of what Omar first expected. Read on its own, this single figure suggests acquisition looks relatively expensive against a single repeat customer's own three-year value, though both figures depend on Cedar & Co.'s own real annual spend, retention period and campaign results, not a fixed rule that applies to every retailer.

Repeat-customer value, 3 years: USD 214.20Customer acquisition cost, one new customer: USD 300
The acquisition-cost bar is longer than the repeat-customer-value bar in this specific comparison. Cedar & Co.'s own figures show winning one new customer currently costs more than what one repeat customer is worth over three years, which is a reason to check retention economics carefully rather than assume retention is always cheaper.
The method

Four steps to compare a repeat customer's own value against the cost of acquiring a new one

  1. Calculate annual profit per repeat customer, from average annual spend converted to profit at the retailer's own margin.
  2. Multiply by the retention period, the number of years an average customer keeps buying, to reach a multi-year repeat-customer value.
  3. Calculate customer acquisition cost, from total marketing spend divided by new customers won in the same period.
  4. Compare the two figures, and use the comparison, not a fixed assumption, to decide where a marketing budget should go.
The trap

A common mistake is assuming retaining an existing customer is always cheaper than acquiring a new one, without calculating both figures for the retailer's own real numbers

A common mistake is assuming retention is automatically the cheaper option, without running the comparison on the retailer's own actual annual spend, retention period and acquisition cost. If Cedar & Co. assumed retention was always cheaper without calculating this lesson's own worked number, it might shift its marketing budget toward retention activity that in this specific case, on these specific figures, is not clearly the better use of the same money, since its own repeat-customer value here is smaller than its own acquisition cost.

06In plain words

A repeat customer is worth the profit they bring in every year, multiplied by how many years they usually keep buying, not just the value of one sale. A new customer costs whatever it takes, on average, in marketing spend to win one. On Cedar & Co.'s own figures, a repeat customer is worth USD 214.20 over three years, and a new customer costs USD 300 to acquire; comparing the two, rather than assuming one is automatically cheaper, is what tells Cedar & Co. where its marketing budget is actually best spent.

07Quick check
  • Repeat-customer value is annual profit per customer multiplied by the retention period in years, not a single sale's value.
  • Customer acquisition cost is total marketing spend divided by new customers won in the same period.
  • Compare the two figures directly; do not assume retention or acquisition is automatically cheaper.
  • Rising acquisition cost makes existing customers relatively more valuable, even if retention economics stay the same.
  • This comparison applies most directly to a retailer that sees the same identifiable customer return, not a one-off wholesale account.
  • Both figures depend on a retailer's own real numbers, not a fixed industry rule.
08Workplace scenario

Cedar & Co.'s marketing team proposes doubling next quarter's new-customer acquisition budget, before comparing it against repeat-customer value

Cedar & Co.'s own marketing team has submitted a proposal to double next quarter's acquisition budget from USD 24,000 to USD 48,000, aiming to win 160 new customers instead of 80. The facts in front of Omar:

  • Cedar & Co.'s own repeat-customer value is USD 214.20 over three years.
  • Cedar & Co.'s own customer acquisition cost is USD 300 per new customer.
  • The proposal does not mention retention spend or compare the two figures.

The note attached to the marketing team's own proposal:

Cedar & Co., internal marketing note. "Recommend doubling next quarter's acquisition budget to USD 48,000, targeting 160 new customers at the current cost per customer. Awaiting owner's approval."

Should Omar approve the doubled acquisition budget as proposed, without first comparing it against repeat-customer value? Decide before you open the decision.

Show decision

No. Omar should compare the proposal against repeat-customer value before approving it, since acquisition currently costs more than a repeat customer is worth on Cedar & Co.'s own figures.

Two facts decide this. First, this lesson's own worked number shows Cedar & Co.'s own acquisition cost of USD 300 already exceeds its own three-year repeat-customer value of USD 214.20 per customer; doubling spend on the more expensive option without checking this comparison risks committing more money to the less valuable side of the comparison. Second, this lesson's own trap warns against assuming one side is automatically cheaper; the proposal itself makes exactly that assumption by expanding acquisition spend without comparing it to retention value first.

Approving the doubled budget without this comparison could commit Cedar & Co. to USD 48,000 of spend on new customers before checking whether that same money, spent on keeping existing repeat customers buying, might be worth more per dollar spent.

09What it costs

Approving the doubled acquisition budget without comparing it against repeat-customer value risks spending USD 48,000 on the less valuable side of the comparison

Proposed acquisition spend, 160 new customers at USD 300 each = USD 48,000
Value of 160 customers if they were retained repeat customers instead, at USD 214.20 each = USD 34,272
Gap between acquisition spend and equivalent repeat-customer value = 48,000 − 34,272 = USD 13,728

This USD 13,728 gap does not mean acquisition spend is wrong in every case, new customers are still needed to replace natural customer loss, but it does show that, on Cedar & Co.'s own current figures, doubling acquisition spend without first checking retention economics risks putting more money into the side of the comparison that currently returns less value per customer.

10Working template

Customer data and loyalty worksheet: calculate repeat-customer value against acquisition cost before approving a budget split

Use the T23-C04 Customer data and loyalty worksheet. For Cedar & Co.'s own figures, enter annual spend per customer, margin, retention period, and marketing spend and new customers won, and the sheet calculates repeat-customer value and acquisition cost side by side, so a budget proposal can be checked against both figures before approval.

[Download the Customer data and loyalty worksheet](../../templates/T23-C04-customer-data-and-loyalty-worksheet.xlsx)

Download the Customer data and loyalty worksheet (Excel)

11Check yourself

1. Why is repeat-customer value calculated over several years rather than from a single sale?

2. Cedar & Co. finds its own repeat-customer value (USD 214.20 over 3 years) is lower than its own acquisition cost (USD 300). What should Omar do?

3. A retailer has annual profit of USD 40 per customer, a 5-year retention period, and acquisition cost of USD 150 per new customer. What is its repeat-customer value, and how does it compare?

12Glossary
ENARFRTRMeaning
Repeat-customer valueقيمة العميل المتكررValeur du client fidèleTekrarlayan müşteri değeriThe total profit a retailer earns from one customer's continued buying over a stated number of years, not just from a single sale.
Customer acquisition costتكلفة اكتساب العميلCoût d'acquisition clientMüşteri edinme maliyetiThe average marketing spend a retailer must make to win one new customer, calculated from total marketing spend divided by new customers won.
Annual spend per customerالإنفاق السنوي لكل عميلDépense annuelle par clientMüşteri başına yıllık harcamaThe average amount one customer spends with a retailer over one year, used to build up a repeat customer's own value.
Retention periodفترة الاحتفاظ بالعميلPériode de rétentionElde tutma süresiThe number of years a retailer expects an average customer to keep buying from it, used to calculate value over more than one year.
Marketing spendإنفاق تسويقيDépenses marketingPazarlama harcamasıMoney a retailer spends specifically to attract new customers or encourage existing ones to buy again.
Break-even comparisonمقارنة نقطة التعادلComparaison de seuil de rentabilitéBaşabaş karşılaştırmasıChecking whether a repeat customer's own value covers, or exceeds, the cost of acquiring a new customer, before deciding where to spend a budget.
13Next

Lesson 4.4: Deciding when a loyalty reward actually changes a customer's own behaviour

You now know how to weigh a repeat customer's own value against the cost of acquiring a new one. The next lesson asks a related question: whether a specific loyalty reward actually changes a customer's own behaviour, or simply pays out to a customer who would have bought anyway. Back to the course map

14Ladder

RecognizeName the two figures a repeat-customer-value comparison is built from.
ConnectSee why a single sale's value does not capture what a repeat customer is worth over time.
CompareTell repeat-customer value and customer acquisition cost apart, and calculate both from a retailer's own figures.
DecideJudge whether a proposed budget split between acquisition and retention makes sense against the calculated comparison.