# Customer acquisition costCustomer acquisition costCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → across telecom channels
A rep at a carrier-owned store spends 25 minutes activating a new postpaid line: credit check, SIM provisioning, device financing paperwork, a demo of the carrier's app. Meanwhile, a customer three miles away completes an online port-in (transferring their number from another carrier) in four minutes, unassisted, no human involved. On paper, the second acquisition looks almost free. Eighteen months later, the online customer has churned (canceled service) at nearly double the rate of the one who sat through the store visit. This is the central tension in telecom customer acquisition costcustomer acquisition costCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow. (): the cheapest channel to acquire through is rarely the cheapest channel to retain from.
CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → is the fully-loaded cost to acquire one paying subscriber, not just the ad spend. In telecom, a defensible CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → calculation bundles:
A simplified formula:
CAC = (Total acquisition-related spend in period) / (New subscribers activated in period)Where "total acquisition-related spend" must include the channel-specific overhead above, not just the marketing line item. This is the "fully-loaded" distinction that separates a real CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → from a vanity metric.
Carrier-owned retail store. High fixed cost (rent, staff, utilities) spread across however many activations happen that month. Industry-watchers commonly estimate fully-loaded CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → through owned retail in the US postpaid market in the $300 to $450 per subscriber range as of the mid-2020s (estimate; carriers do not disclose this line item directly). This includes an in-store rep's time, device subsidy exposure, and allocated store overhead.
Online / direct-to-consumer port-in flow. Much lower marginal cost per activation once the digital funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → is built. Estimates for pure online acquisition (paid search, app-based sign-up, self-service porting) often fall in the $100 to $200 per subscriber range (estimate). No rep time, no store lease allocation. But this figure often excludes the retargetingretargetingShowing ads to users who have previously visited your site or interacted with your brand, to bring them back and drive conversion.View full definition → and incentive spend needed to get a self-service customer to actually finish porting, a notoriously leaky step.
Third-party retailer (big-box, national retail chains, authorized dealers). Carriers pay a per-activation commission plus a spiff (sales incentive bonus) for hitting volume targets. Commissions in the US market are commonly cited in the $150 to $300 per activation range (estimate) depending on plan tier and device bundle. Cheaper than owned retail on the invoice, but the carrier has far less control over how the sale is pitched.
This is the core lesson. CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → without a quality lens is misleading.
Self-service customers are often price-shoppers actively comparing carriers online; they found you because you were cheapest that week, and they'll leave the same way. Lower acquisition friction correlates with lower switching friction later. Call it adverse selection in online porting.
There's also incentive misalignment at third-party retailers. A commissioned rep at a multi-carrier retailer is paid to close the sale, not to match the customer to the right plan. This drives higher early-life churn and more billing disputes, both of which carry downstream service cost that never shows up in the CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → line.
The friction in a carrier store is a retention feature. The 25-minute in-store process includes credit vetting and expectation-setting (autopay setup, plan walkthrough) that filters out marginal subscribers before they activate, and primes the ones who do activate to stay.
The metric that reconciles this is CAC payback period: how many months of margin it takes to recover CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition →. A postpaid subscriber with average revenue per user (ARPU) of roughly $45 to $55/month (a commonly cited US postpaid estimate) and healthy gross margingross marginGross margin is the share of revenue left after subtracting the direct cost of producing goods or services, expressed as a percentage of revenue.View full definition → might pay back a $350 store CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → in 8 to 10 months. If that channel's churn ratechurn rateChurn rate is the percentage of customers or revenue lost over a period. It measures how fast a business loses its existing customer base.View full definition → is 1.0% per month versus 1.8% for an online-acquired cohort, the online subscriber may never fully repay CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → before churning, even though their upfront CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → was smaller.
Assume:
Average subscriber lifetime (a simplification) is roughly 1 / monthly churn rate.
Despite costing $230 more upfront to acquire, the store subscriber generates roughly 70% more net value over their lifetime in this illustration. This is why carriers keep funding owned retail even as digital channels scale: CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → alone is the wrong optimization target. (Note: this is a simplified illustrative model; real telecom lifetime valuelifetime valueLifetime Value: the total revenue (or profit) a customer generates throughout their entire relationship with your business.View full definition → models also weight in handset financing risk, contract length, and bundle attach rates. See the GSMA's Mobile Economy reports for sector-level structural context on operator economics.)
In the EU, number portability rules under the European Electronic Communications Code require porting within one working day in most member states, which makes the online porting channel structurally cheaper and faster than in the US, where port timelines vary more by carrier. This compresses CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → further for European online channels but also intensifies price-based churn, since switching is nearly frictionless. European regulators (via national bodies like Ofcom in the UK or BEREC-coordinated authorities in the EU) also restrict long contract lock-ins more than the US market historically did, which structurally raises churn exposure regardless of acquisition channel.
Knowledge check
1. Why does the online port-in channel described in the lesson appear cheaper on paper but potentially cost more overall?
2. A telecom company calculates CAC using only its media/ad spend divided by new activations. What is the main problem with this approach?
3. Why might a carrier-owned retail store's fully-loaded CAC be sensitive to activation volume in a given month?
4. Select ALL correct answers about what should be included in a fully-loaded telecom CAC calculation.
Select all the correct answers.
5. Select ALL correct answers about the relationship between acquisition channel and subscriber quality illustrated in the lesson.
Select all the correct answers.
Most carriers report a blended CAC across all channels, which is why headline CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → figures in earnings commentary look moderate even when individual channels vary widely. The strategic question marketing leaders actually manage is channel *mix*: how much volume to push through low-CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition →/high-churn online funnels versus high-CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition →/low-churn owned retail, given finite subscriber growth targets each quarter.
A useful diagnostic question when evaluating any telecom acquisition channel: "What is this channel's CAC payback period, and does it beat the average tenure of subscribers acquired through it?" If payback exceeds expected tenure, that channel is destroying value even if it looks cheap on the acquisition line.
🎬 [VIDEO: "How Telecom Companies Make Money" - youtube.com - search this title on YouTube for an accessible walkthrough of telecom unit economics including acquisition and retention cost drivers]