Here are two questions that decide whether your marketing is an investment or a leak, and most Nigerian businesses can answer neither: What does it cost you to win a customer? And what is that customer worth once won?
Not roughly. In naira.
Every marketing decision you make, how much to bid, which channel to fund, whether that agency fee is expensive or cheap, whether to discount, whether a campaign “worked”, is secretly a bet on those two numbers. Businesses that know them make marketing decisions like investors. Businesses that don’t make them like gamblers with a lucky feeling. This guide gets you from the second group to the first with nothing more than arithmetic you already have the records for.
Customer acquisition cost
Customer acquisition cost (CAC) is everything you spend to win customers in a period, divided by the customers won in that period. The trap is in the word “everything.” The flattering version counts ad spend only. The true version counts ad spend, plus agency or freelancer fees, plus marketing tools, plus the salaries (or salary-share) of people doing the marketing and selling, because all of it was spent to produce those customers. If you spent ₦2.4M across all of that last quarter and won 60 customers, your CAC is ₦40,000. Simple, and immediately clarifying, because most businesses have never seen the fully-loaded number and are quietly startled by it.
Two refinements make CAC genuinely useful rather than just known:
- CAC by channel. A blended CAC hides everything interesting. The whole point is comparison, if referrals win customers at ₦8,000 and cold paid social at ₦95,000, your next budget decision writes itself. This requires attribution you can trust, which is why measurement comes first; broken tracking doesn’t just blur reports, it assigns your CAC to the wrong channels.
- CAC by customer type. The customer who came for the discount and the one who came for the outcome may cost the same to win and be worth wildly different amounts. Which brings us to the second number.
What a customer is actually worth
Lifetime value (LTV) is the profit, not revenue, a customer generates across their whole relationship with you. A serviceable version for most businesses is average order profit × purchases per year × years they stay. A customer spending ₦30,000 per order at 40% margin, four times a year, for three years, is worth ₦144,000, not the ₦12,000 profit of their first order.
That gap between first-order worth and lifetime worth is the single most consequential blind spot in marketing, because businesses that only see the first order systematically underbid for customers their competitors would profitably fight for.
The business that knows a customer is worth ₦144,000 can afford ₦40,000 to win one. The business that thinks a customer is worth one ₦12,000 order can afford almost nothing, and gets outbid, out-advertised, and out-grown by the first business, while wondering how they can possibly afford those ads. They’re not spending recklessly. They’re seeing a number you’re not.
The ratio that turns two numbers into decisions
Divide LTV by CAC and you get the health metric of your entire marketing operation. The commonly used posture: around 3:1 is healthy, the customer is worth about three times what they cost, leaving comfortable room for service costs, repeat-purchase risk, and error.
Meaningfully below that, growth is buying revenue with shrinking margins. Dramatically above it, say 8:1, is usually not prudence but underinvestment, you’re winning customers so cheaply that you should be buying more of them before competitors notice. Alongside the ratio, watch payback period: how many months until a customer’s profit repays their acquisition cost.
In a cash-tight economy, a business with a 3:1 ratio but an 18-month payback can still suffocate; Nigerian working-capital reality often makes payback the more binding constraint of the two.
What these numbers change in practice
- Bidding stops being guesswork. Knowing affordable CAC per customer type is what makes value-based bidding possible, you can tell the ad platforms what a lead is worth, and rising click costs become survivable arithmetic instead of vague dread.
- Retention gets its budget back. The moment LTV is visible, the cheapest growth lever becomes obvious: extending it. Adding one purchase per year, or one year of tenure, raises the worth of every customer at almost no acquisition cost, the entire economic case for the email and WhatsApp programmes most budgets starve.
- Vendors and channels become comparable. “Is ₦500k/month for marketing expensive?” is unanswerable. “Does it produce customers below our affordable CAC?” is a yes/no question with an invoice attached.
- Discounting reveals its real cost. A discount that wins a low-LTV bargain-hunter and trains them never to pay full price shows up, in these numbers, as exactly what it is.
Start crude, then sharpen
The perfect version of this analysis needs cohorts, margins by product line, and clean attribution. Don’t wait for it. The crude version, one quarter’s true total marketing cost, customers won, average order profit, honest guesses at frequency and tenure, takes an afternoon with your existing records and will already change decisions. Then improve the inputs monthly as your measurement improves. The only wrong version is the one that never gets calculated because it couldn’t be perfect.
Nail your numbers
CAC and LTV are not finance-department exotica; they’re the two numbers that make every other marketing number mean something. Calculate them (fully loaded, profit not revenue), split them by channel and customer type as your measurement allows, steer by the ratio and the payback period, and spend where the arithmetic says to. Marketing stops being a monthly act of faith and becomes what it should have been all along, buying customers for less than they’re worth, on purpose, repeatedly.
Want the numbers done with you? The free marketing plan includes exactly this arithmetic for your business: fully-loaded CAC, honest LTV, the ratio, the payback period, and what they say your next naira should do. If you’re spending ₦1M+ a month on marketing, it’s yours at no cost.
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Ratios and postures cited (such as 3:1 LTV:CAC) are widely used industry heuristics, not laws; the right thresholds vary by margin structure, capital position, and growth stage. This article is general information, not financial advice.