Lifetime gross profit divided by the cost to acquire a customer. It is a variation on the familiar LTV:CAC ratio with two changes. The numerator uses gross profit in place of revenue, so businesses that give away most of their margin are judged honestly. The denominator splits acquisition cost into front-end media spend and the back-end cost to fulfill, so you can see which part of the cost is the real problem.

Why gross profit in the numerator instead of revenue?

Because revenue flatters any business that keeps little of it. A wholesaler can move huge dollar volumes while keeping a thin slice, and an education business can book smaller sums while keeping most of each one. Rank them on revenue and you fund the wrong one. Gross profit per acquisition dollar tells you which business actually turns marketing spend into money.

What does splitting CAC into front-end and back-end buy you?

Clarity about where the cost lives. The front-end half covers what it takes to put a qualified lead in the pipeline; the back-end half covers the selling and fulfillment that turn the lead into revenue. A channel can look expensive on blended CAC while being cheap on the front end, with all the cost hiding in a slow sales process. Splitting the two tells you whether to fix marketing or fix sales.

Does this only apply to holding companies?

No. Any business with more than one product line, price point, or customer type benefits. The moment you compare two things that monetize differently, a single blended ratio starts to lie. LTGP:CAC gives every line the same honest yardstick, which is why it works as well inside one SaaS product with three plans as it does across three separate companies.

How do you keep the metric trustworthy?

One rule above all: finance and marketing must compute it the same way from the same source of truth. I built the definition into the accounting tags so the number came straight from the books rather than a marketing spreadsheet. The fastest way to lose a North Star is to let two teams calculate it two ways and spend every meeting arguing about whose version is right.

LTGP:CAC across three business models

One of the three businesses I ran looked, on revenue, like the obvious place to send the next marketing dollar. Ranked by what it actually kept for every dollar spent to grow it, that same business came dead last. Revenue was pointing me at the wrong one, and it took a different metric to see it.

At Leverage Companies I ran growth across three business units at once. Brick City Capital, a real estate lender. Deals & Dollars, a real estate education business. Leverage Homes, a property wholesaling operation. Three teams, three funnels, three ways of turning a dollar of marketing into a dollar of profit, and a CEO with one question: where should the next dollar go. Every unit reported its own numbers in its own language, and revenue, the one figure they all shared, was the most misleading of the lot.

Why revenue could not answer the question

Start with the lender. It moved large sums, so on revenue it looked like the obvious place to invest. But a lender keeps only a thin slice of what passes through it, and most of every dollar goes straight back out the door in cost of capital and fulfillment. The education business booked far smaller sums and kept most of each one. Put it in round terms. Move a hundred dollars of loans and keep three. Sell a hundred dollars of education and keep seventy. On revenue the lender wins in a landslide. On what reaches the bottom line the race is not close, and the smaller business is the one compounding.

Rank the three on revenue and you send money to exactly the wrong place. I needed a numerator that told the truth about what each business kept.

A DSCR loan and a course seat look nothing alike, until you express both as gross profit per dollar of acquisition. Then they sit on one ranked list.

Change one: gross profit in place of revenue

The familiar health metric for a business is LTV to CAC: the lifetime value of a customer against the cost to acquire them. The trouble is that lifetime value usually means revenue, and revenue rewards volume regardless of margin. So the first change was to swap the numerator to lifetime gross profit, which is what the business actually keeps after the direct cost of delivering the product.

I called the result LTGP to CAC, lifetime gross profit over acquisition cost. With gross profit on top, the wholesaler's thin margins and the education business's fat ones showed up in the same number, and the three businesses could finally be compared without one of them cheating on volume.

Two changes. Gross profit replaces revenue in the numerator. Acquisition cost splits into the media that makes a lead and the effort that closes it.

Change two: split the cost of acquisition in two

The denominator needed work too. A blended acquisition cost hides where the money actually goes. In a phone-sales business especially, the cost of getting a lead in the door is a small fraction of the cost of closing it, and a single CAC number smears those two together until you cannot tell which one is broken.

So I split it. Front-end CAC is the media and marketing spend to produce a qualified lead. Back-end CAC is the sales effort and fulfillment cost to turn that lead into revenue. The unit of analysis became a single acquisition source paired with a single monetization path, measured all the way through.

Split acquisition cost in two: the media to make a lead, and the sales and fulfillment to close it. Blend them and every channel looks wrong.

Front-end cost buys the lead, back-end cost closes it. Measured together they smear into one misleading number; measured apart they point at the broken half.

This split earned its keep almost immediately. A channel that looked expensive on blended cost turned out to be cheap to acquire from and slow to close, which is a sales problem wearing a marketing costume. Another looked efficient until the fulfillment cost behind it came into view. Splitting the denominator told us whether to fix the ad or fix the process, and those are very different jobs.

The number only works if everyone computes it the same

A North Star only works if there is exactly one of it. The moment finance and marketing calculate the same metric two ways, every meeting turns into a fight about whose math is right instead of what to do about it. I have watched that argument eat entire quarters.

So I moved the definition out of a marketing spreadsheet and into the accounting system itself. Working with the books, I built a tag structure that rolled real costs and real gross profit up into the metric, so the number the marketing team saw came from the same source of truth as the number finance saw. When the definition lives in the books, the argument about the number simply ends, and the argument about the decision can begin.

If finance and marketing compute the North Star differently, you do not have a North Star. You have two spreadsheets that disagree.

What it changed

Once every business unit reported the same honest ratio, the investment question answered itself. The order flipped. The unit that looked strongest on revenue returned the least for each acquisition dollar, and a smaller one was the efficient engine worth feeding first.

Illustrative. Rank on revenue and you feed Business A. Rank on gross profit per acquisition dollar and you feed Business B. Same companies, opposite decision.

Budget-setting stopped being a negotiation between three teams defending their own math and became a ranking anyone in the room could verify. We moved spend toward the efficient unit, watched its ratio hold as it scaled, and only then fed it more. Scaling in steps like that matters, because efficiency at a small budget is a hypothesis about efficiency at a large one, and the ratio is how you catch the moment the hypothesis breaks.

This is the unit-economics lens from the growth operating system, taken to its logical end. In the pricing lever I showed how plan mix sets the ceiling on what a single SaaS customer is worth. LTGP:CAC generalizes that same instinct to every business, and every channel inside one, so they all rank on a single honest list.

Build your own version

You do not need three companies to use this. If your business has more than one product, price, or customer type, a blended ratio is probably lying to you. The steps:

Swap revenue for gross profit in your customer-value number, so margin differences show up honestly.
Split acquisition cost into front-end (media to make a lead) and back-end (sales and fulfillment to close it).
Define the unit as one acquisition source paired with one monetization path, and follow each pairing end to end.
Move the definition into your accounting system so finance and marketing read the same number.
Rank every product, channel, or business on gross profit per dollar of acquisition, and feed the top of the list.

The payoff is a business you can steer with one number that does not flatter anyone. Every line competes on the same honest terms, and the dollar you were about to spend on the loudest line goes instead to the one that quietly turns it into the most profit.

If you are trying to compare businesses or channels that make money in different ways, this is the kind of measurement I build. Let's talk.

LTGP:CAC: one North Star across three business models