Customer lifetime value, without the spreadsheet theatre
The single number that tells you what you can afford to spend on marketing. Most businesses have never calculated it.
Almost every marketing decision comes back to one question: what is a customer worth to you?
Without that number, every budget conversation is guesswork and every channel comparison is vibes.
The basic calculation
Three inputs:
Average transaction value — what a typical job or sale is worth. Purchase frequency — how many times a typical customer buys, over their whole relationship with you. Gross margin — the percentage left after the direct costs of delivering.
Multiply all three.
A detailing business: 180 dollars average, six visits over two years, 60 percent margin. 180 × 6 × 0.6 = 648 dollars of gross profit per customer.
That's your lifetime value. Not revenue — profit, which is the only version that helps you make decisions.
Why most people get it wrong
They only count the first sale. The most common error, and it makes every marketing channel look worse than it is. If you'd pay 60 dollars to get a 180-dollar job you might decline. If you'd pay 60 to get 648 of profit, you'd take that every day.
They use revenue instead of margin. Spending 300 to acquire a customer who generates 500 in revenue at 30 percent margin loses you money while looking like a win.
They average across wildly different customers. If half your customers are one-off and half are repeat, one blended average describes nobody.
Segment it when it matters
If you have distinct customer types, calculate separately.
A landscaper might find one-off installs worth 400 and maintenance clients worth 3,000. Same business, two numbers, completely different acquisition strategies. Knowing that, you'd happily spend far more to acquire a maintenance client — and might structure the installation offer specifically to convert into one.
That insight alone is often worth more than any campaign.
What to do with the number
Set an acquisition ceiling. A common target is spending no more than a third of lifetime value. At 648, that's about 215 per customer.
Judge channels honestly. A channel producing customers at 150 is good. At 400 it's losing money, however impressive the click-through rate looks.
Decide what's worth building. If a customer is worth 648, spending two days improving a page that lifts conversion from 2 to 3 percent is obviously worth it. The number turns arguments into arithmetic.
Watch the cash flow
Lifetime value arrives over years. Marketing is paid now.
If you spend 215 today and recover 648 over two years, you're funding a gap. That's fine with reserves and dangerous without. Businesses do grow themselves broke this way while every projection says they're profitable.
Track payback period alongside lifetime value — how long until a customer has repaid what you spent to get them. Under three months means you can scale hard. Over a year means be careful.
The easiest way to increase it
Most people try to raise lifetime value by acquiring better customers. Usually the faster win is on the existing ones.
Increase frequency — the reason many service businesses send reminders. Increase transaction value — an additional service offered at the right moment. Reduce churn — the least glamorous and often the largest lever.
Every one of those raises the number, and a higher number means you can outbid competitors for the same customer and still profit. That's a durable advantage, and it comes from operations rather than advertising.
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