Customer Acquisition Cost (CAC)
Customer Acquisition Cost is the total cost a company incurs to acquire one new paying customer, encompassing marketing spend, sales force expenses, and channel incentives, and is a pivotal unit economics metric for Indian fintech, e-commerce, and consumer internet companies.
In the era of India's digital economy boom — roughly 2015 to 2022 — hundreds of startups competed for the attention of the country's rapidly expanding internet user base. Capital was cheap and investors tolerated heavy spending to acquire users quickly. CAC became the central variable in debates about whether these businesses had viable economics, because high CAC combined with short customer lifetimes implies a structurally loss-making model regardless of revenue scale.
CAC is computed by dividing total sales and marketing expenses incurred in a period by the number of new customers acquired in the same period. For a lending fintech, this includes advertising costs, co-branded credit card programme fees, distribution agent commissions, and credit bureau query costs. For a food delivery platform, it includes app install campaigns, new user discount schemes, and referral bonuses. The numerator should include all costs that would not be incurred if the company were not trying to grow its customer base.
CAC is most analytically useful when compared against lifetime value (LTV). The LTV:CAC ratio tells investors how many times over a customer's lifetime value exceeds the cost to acquire them. A ratio below 1 means the company destroys value on every customer, which is unsustainable. A ratio of 3:1 or above is often cited as indicative of a healthy, scalable business. However, the quality of this ratio depends critically on the assumptions embedded in LTV calculations.
Payback period — the number of months of gross profit required to recover the CAC — is a complementary metric that is less sensitive to long-horizon LTV assumptions. Indian fintech companies like Slice (now merged with North East Small Finance Bank), Uni Cards, and various BNPL platforms reported CAC in the range of Rs 500 to Rs 2,000 per new credit customer depending on the channel and product, with payback periods that were central to investor due diligence.
As funding conditions tightened after 2022, Indian consumer internet and fintech companies came under pressure to demonstrate declining CAC through organic and referral-driven acquisition rather than paid marketing. Companies that had built strong brand recognition or network effects — such as policy aggregators like Policybazaar or lending platforms like BankBazaar — argued that CAC was declining as their traffic mix shifted from paid to organic search. Tracking CAC trends across channels (paid versus organic) provides deeper insight than the blended CAC figure alone.