The One Ratio That Predicts How Big Your Business Can Get | LTV to CAC

Name: The One Ratio That Predicts How Big Your Business Can Get | LTV to CAC | Notebook of a COO Podcast
Uploaded: 2026-02-18
Duration: 8 min 54 s
Description: The One Ratio That Predicts How Big Your Business Can Get | LTV to CAC: a Notebook of a COO podcast episode for small business operators. Listen on Spotify, Apple Podcasts, YouTube, Amazon Music, iHeart, and Pocket Casts.

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In this episode

The Unit Economics That Set Your Growth Ceiling

One ratio predicts how large a business can get: lifetime value divided by customer acquisition cost. It tells you what it costs to make more money, how aggressively you can spend to grow, and whether you are building a real company or a very expensive job. Most owners chase revenue and never calculate it, which is why they plateau at a million or two and cannot work out why.

Five steps follow: calculating real lifetime value, calculating honest acquisition cost, reading the resulting ratio, using it to choose between offers, and the only two ways to move it.

Key takeaways

Lifetime value is not what a customer pays you. It is what remains after cost of goods and the labor to fulfill, which makes it lifetime gross profit rather than revenue.
A worked example: a Facebook ads agency charged $2,000 a month, kept clients five months and called their LTV $10,000. With $1,000 a month per client in ad spend and account managers earning $5,000 a month who could handle only five clients each, the real gross profit was zero.
CAC is marketing payroll plus ad spend plus sales payroll and commissions, divided by customers acquired. Spending $10,000 on ads and $10,000 on sales and marketing payroll to win 20 customers gives a CAC of $1,000.
A $5,000 customer acquired for $1,000 is a 5 to 1 ratio, which is decent and supports growth. Starbucks by contrast carries a lifetime value per customer of $14,099 against roughly $10 to get someone through the door, which is how 38,000 locations get built without franchising.
Choosing between offers is math, not instinct. An offer costing $50 to acquire and worth $2,000 is 40 to 1, versus $2,000 to acquire and worth $15,000 at 7.5 to 1. Run the first because you can reach far more people, then stack the second as a backend upsell.
There are only two levers: raise LTV through price, lower delivery cost, higher purchase frequency, cross-sells, upsells or reduced churn, or lower CAC through funnel efficiency. Lifting ad click-through from 1% to 3% triples top of funnel efficiency.

Questions this episode answers

How do I calculate lifetime value for my business?

Multiply the price per month by the number of months a customer stays, then subtract what it costs you to deliver. For products that means cost of goods; for services it means the share of delivery payroll attributable to each customer. What you are left with is lifetime gross profit, which is the only version of the number worth using.

What is a good LTV to CAC ratio?

Around 5 to 1 is decent and you can grow on it: a customer worth $5,000 acquired for $1,000. Higher ratios give more room to outspend competitors and hire talent. As an extreme reference point, Starbucks sits near $14,099 in lifetime value per customer against roughly $10 in acquisition cost.

Why is my agency losing money when revenue looks strong?

Because revenue is not margin. Pass-through ad spend and the payroll of the people servicing each account can consume the entire fee. If one account manager can only handle a handful of clients, that labor cost has to be divided across those clients and subtracted before you make any claim about lifetime value.

Should I pick the offer with the higher lifetime value or the lower acquisition cost?

Usually the one with the better ratio and the wider reach. An offer costing $50 to acquire and worth $2,000 beats one costing $2,000 to acquire and worth $15,000, because far more people can be reached at the lower acquisition cost. The larger offer then performs best as a backend upsell to customers you already have.