Blog · Finance metrics and formulas · Financial services
Measure customer acquisition cost for lending, insurance and investment-product cohorts using acquisition spending and completed activation events. This worked method separates initial acquisition from continued activity and compares costs with equally mature contribution.
Customer acquisition cost in financial services divides attributable acquisition spending by customers who complete a defined product activation. For a lender, that can mean a funded loan; for an insurer, an effective policy with its first premium paid; for an investment platform, a funded account. Report continued activity and subsequent contribution beside CAC so a low acquisition cost does not hide early exits.
Choose the event before counting customers. An application, quote, approval or empty account can occur without the commercial relationship reaching the intended stage.
| Product cohort | Illustrative acquisition event | Later activity checkpoint | Contribution evidence |
|---|---|---|---|
| Lending | Loan funded | Loan remains active under an agreed servicing definition | Interest and fees, less funding, servicing and credit costs |
| Health insurance | Policy effective and first premium paid | Coverage remains in force | Earned premiums, claims and allocated servicing costs |
| Investment product | Account receives qualifying initial funding | Account remains funded and active under an agreed definition | Advisory or product fees less applicable servicing costs |
These are illustrative measurement choices. Distinguish scheduled loan payoffs from unexplained departures when interpreting activity.
HealthCare.gov defines a premium as the amount paid for health insurance each month. That payment is not itself an insurer's contribution after claims and costs. Similarly, the SEC's Form ADV Part 2 asks advisers to disclose their fee schedules and whether fees are deducted from client assets; the client asset balance and the adviser's fee are different amounts.
The customer acquisition cost guide covers the underlying formula. Apply the same activation definitions to fintech providers of these products.
Export acquisition expenses by campaign, product and cohort, with the cost category and attribution method. Include unsuccessful acquisition efforts assigned to the cohort; excluding spending on declined applicants or prospects who never activate understates the cost of the successful acquisitions.
For these three illustrative US providers, finance approves the acquisition costs below. Use expense measures rather than payment dates. Ongoing servicing and claims belong in subsequent contribution rather than being deducted from CAC.
| Provider cohort | Paid media (USD) | Acquisition staff and commissions (USD) | Acquisition verification and incentives (USD) | Total acquisition spending (USD) |
|---|---|---|---|---|
| Lender | 90,000 | 60,000 | 30,000 | 180,000 |
| Health insurer | 60,000 | 50,000 | 10,000 | 120,000 |
| Investment platform | 100,000 | 70,000 | 30,000 | 200,000 |
For the lender, 90,000 + 60,000 + 30,000 = $180,000. The insurer's total is 60,000 + 50,000 + 10,000 = $120,000; the investment platform's is 100,000 + 70,000 + 30,000 = $200,000. Reconcile each numerator to its approved expense allocation, including credits and reversals.
Use one customer row per provider cohort, with customer ID, cohort label, activation date, activity at the checkpoint and contribution for the first 90 days after activation. Deduplicate multiple products or accounts under the agreed acquisition unit. Do not count an existing customer's additional product as a new-to-company customer unless the metric is explicitly labeled otherwise.
All customers in this example activate during January. The report is prepared after every customer has a complete first-90-day observation window. Activity is measured at each customer's own 90-day checkpoint, rather than one shared calendar date.
CAC = Attributable acquisition spending / Newly activated customers
Acquisition spending per active customer at day 90 = The same acquisition spending / Acquired customers active at day 90
| Provider cohort | Newly activated customers | Active at day 90 | Activity rate | CAC (USD) | Spending per day-90 active customer (USD) |
|---|---|---|---|---|---|
| Lender | 300 | 240 | 80% | 600.00 | 750.00 |
| Health insurer | 400 | 360 | 90% | 300.00 | 333.33 |
| Investment platform | 500 | 400 | 80% | 400.00 | 500.00 |
The lender's CAC is 180,000 / 300 = $600. Its later denominator gives 180,000 / 240 = $750. Dollar ratios round to cents, with unrounded amounts retained for checks.
Do not rank these businesses from CAC alone: their product economics and acquisition events differ. The industry CAC comparison guide explains why matching definitions matters before using external reference figures.
On a Costs sheet, use column A for cohort, B for cost category and C for approved acquisition expense. With the cohort label in summary cell A2, its total cost is:
=SUMIFS(Costs!$C$2:$C$1000,Costs!$A$2:$A$1000,A2)
On a Customers sheet, put the cohort in B, activation date in C and day-90 active status in D. These formulas count acquired customers and active customers respectively:
=COUNTIFS(Customers!$B$2:$B$1000,A2,Customers!$C$2:$C$1000,">0")
=COUNTIFS(Customers!$B$2:$B$1000,A2,Customers!$D$2:$D$1000,"Yes")
The Customers sheet needs valid acquired-customer rows, unique IDs and genuine dates. Extend the ranges to cover the whole export. Divide cost by each count, and leave a zero denominator flagged for review rather than displaying zero CAC.
The lender's check is 600 × 300 = $180,000, also equal to 750 × 240. If only day-90 activity improves from 240 to 270 customers, initial CAC remains $600 while spending per active customer becomes 180,000 / 270 = $666.67.
Keep contribution for all originally acquired customers, including those who exit. Income means lending interest and fees, earned insurance premiums, or investment fees. Subtract applicable post-activation costs; these exclude acquisition expenses already in CAC.
| Provider cohort | First-90-day product income (USD) | Included post-activation costs (USD) | First-90-day contribution (USD) | Contribution per originally acquired customer (USD) | Contribution / acquisition spending |
|---|---|---|---|---|---|
| Lender | 180,000 | 84,000 | 96,000 | 320.00 | 53.33% |
| Health insurer | 600,000 | 528,000 | 72,000 | 180.00 | 60.00% |
| Investment platform | 100,000 | 60,000 | 40,000 | 80.00 | 20.00% |
For the lender, 96,000 / 300 = $320 and 96,000 / 180,000 = 53.33%. These are limited-period recovery measures, not lifetime returns or a promise of a fixed payback date. Use financial services customer segmentation for further comparisons within consistently defined cohorts.
Bring acquisition expense allocations, activation records and subsequent contribution exports. Covirage maps the columns, and its tools compute and check cohort costs and contribution; the external AI model explains the results with every figure traced to its rows. Create a free Covirage account and bring a sample of your own data.
See Covirage for financial services for the supporting industry context.
Use completed customer acquisition events for CAC, with the event defined for the product. Applications and approvals are useful funnel measures, but neither necessarily creates an active customer. Keep their cost ratios separately labeled so they do not replace funded-customer CAC.
Do not use funded principal or customer investment balances as the provider's revenue. Follow finance's product contribution definition, using the applicable interest, fees or earned premiums and related costs. Customer funding measures activation and scale, not the amount earned by the business.
It uses a different denominator. Acquisition cost divides spending by customers initially acquired. Cost per customer still active at a later checkpoint divides the same spending by survivors. Show both to distinguish the acquisition event from subsequent inactivity or cancellation.