unit-economics

The ad number you're reading backwards (and the line nobody drew for you)

Revenue-ROAS hides COGS and fulfilment, so a celebrated 3x can lose money on every sale. Here is the one division that draws your own line.

By Samer Azar, Fractional CFO · 2026-07-25 · 7 min read

Key Takeaway: There is a line under every campaign that marks break even, and nobody ever drew it for you. Finding yours takes ten seconds and one division, and it may re-score the campaign you are proudest of.

Dear reader,

You are looking at a green number on a dashboard right now. A campaign doing 3x. It is the tab you open when you want to feel like something is working.

And it is quietly losing you money on every sale it makes.

There is a line under every campaign that marks the point where you break even.

Nobody ever drew it for you. The target you were handed instead was built for someone else.

One click tells me who I am building this for.

The number is built for someone else

Your agency benchmarks you to 2-3x because that number keeps 60%-margin brands alive.

Wear it on a business that keeps twenty cents on the dollar and the same "win" bleeds cash on every order.

There is one division that gives you your own line instead of theirs. Here it is.

The line nobody drew

Breakeven ROAS = 100% divided by the cents you keep on a sale.

The cents you keep means what is left after the product and the cost of getting it to the customer. Smaller than the gross margin your dashboard shows, and more honest.

Keep twenty cents on the dollar and 100 divided by 20 is 5. You need a 5x before an ad dollar breaks even. Keep fifty cents and you break even at 2x.

That number is your line. Read every campaign against it.

Above your line, each ad dollar comes back as more than a dollar kept. The campaign is making you money.

Below your line, it comes back as less. The campaign is costing you money, whatever colour the dashboard paints it.

That one line is the first thing Cash Actions puts in front of you. Now hold it next to the campaign you are proudest of.

The $100 order, walked through

Say you keep twenty cents of margin on every revenue dollar. Your breakeven is 5x.

Now take the 3x campaign. One dollar of spend returns three dollars of revenue. Three dollars at twenty-cent margin is sixty cents kept.

You put in a dollar and got sixty cents back. You lose forty cents on every single ad dollar.

The green badge is a slow leak wearing a winner's costume.

The rest of this issue is the part your dashboard will never tell you.

How a winning channel goes underwater without the number moving, your own margin-to-breakeven table, and the weekly line that catches the leak before it costs a payroll.

If you work in finance, you know a founder who reports on ROAS and never once looks at margin. Send them this issue. It is the one line that changes how they read every campaign they run.

Your winner wears a green badge

I have watched this happen.

A brand's best-performing channel was running over budget because everyone read it as the top earner. Then fulfilment, ad spend and samples were all charged against it, and the channel went underwater.

Nobody had drawn the line, so nobody saw it cross.

That is the gap between gross margin and the cents you keep, moved out of the spreadsheet and onto your ad account.

And once you see it, the idea of one "good" ROAS for every brand stops making sense.

One target cannot fit every brand

Breakeven ROAS = 100% ÷ the cents you keep on a sale. Find your own line, then read every campaign against it.

Run the one division down your own margins and the whole idea of a single "good" ROAS falls apart:

• Keep 50 cents on the dollar, you break even at 2x.

• Keep 40 cents, you break even at 2.5x.

• Keep 33 cents, you break even at 3x.

• Keep 20 cents, you break even at 5x.

Same math, four different lines. A brand keeping fifty cents can celebrate a 2x all day. A brand keeping twenty needs more than double that just to get to zero.

The 2-3x somebody handed you was built for their margins and their monthly report. You are allowed to throw it out.

But before you cut anything, there is a mistake waiting on the other side of the line.

The line cuts both ways

Everything above warns you about the campaign sitting below your line.

There is an equal and opposite mistake, and profitable brands make it every day: starving a campaign that sits comfortably above it.

I had this exact conversation with a founder this week. Channel proven, margins healthy, the ad dollar earned back in a couple of months, and still afraid to raise the budget.

So run one more number on your winner: how many months of kept margin it takes to earn back the ad dollar. That is your payback clock.

Above your line and paid back inside three months? Count repeat purchases and it is faster still.

The expensive mistake flips from the ads you are buying to the growth you are not.

The full payback-clock issue, LTV math and all, is on my list. Reply if you want it bumped up.

There is just one catch with a number you run once.

The catch with a number you run once

The division is a snapshot. You run it this weekend, you find your line, and by Monday the campaign has already moved.

And a losing campaign is quiet. By the time the dashboard feels wrong, it is four weeks and a payroll too late.

So the whole point is a line that does not wait for you to feel it.

You set your breakeven number once. Every week, a check reads your actual ROAS against that line and stays quiet unless it breaks. One message, and only when something moved.

That is what I am building with Cash Actions, in the open, for founders who run on Shopify.

It opens with a founding group of twenty. The deposit is refundable if I do not deliver, so the risk stays mine.

The working-capital map behind all of these numbers, the seven levers that move every one of them, I laid out in full here.

Do this before Monday

Run one division this weekend, before the week swallows the thought. Take 100 and divide it by the cents you keep on a sale. Write the number down.

Then open your best campaign and read its ROAS against that line.

If your winner is sitting under the line, it has been leaking the whole time, and now you can see it.

Don't be a knocker-upper

Reading your ad numbers off the platform's dashboard, against a target somebody else handed you, is the knocker-upper way of running a business.

Before alarm clocks existed, there was a person whose job was to walk through town with a long stick, tapping on windows to wake people up for work. That job disappeared overnight when alarm clocks became cheap.

A ROAS you glance at once a quarter is the long stick. A breakeven line that watches every campaign is the alarm clock.

Don't be a knocker-upper.

Take care of your cash, and it takes care of almost everything else.

Samer

P.S. What is the breakeven ROAS for your business? Reply with the margin you keep on a sale and I will send you back the number. That is the line to run every campaign against, and it is exactly the kind of thing Cash Actions is built to hold in front of you. Next week: you drew one line under your ads today. There are five more under your business, and the published benchmarks put every one of them in the wrong place.

Know a founder who only checks the numbers when something already feels wrong? Send them this issue. The one division alone is worth their weekend.

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