When to Kill an Ad (and When to Leave It Alone)

Most ad accounts we audit don’t have a creative problem. They have a discipline problem.

Ads that should have been cut two weeks ago are still spending. Ads that were about to work got turned off on day two because someone panicked at a bad morning. Both mistakes come from the same place: nobody decided the rules before the money started moving.

So before any ad runs on an Aura account, we write the kill rule down. Here’s how it works.

Step 1: Set the target CPA in writing

Everything hangs off one number: the most you can pay for a customer and still make money. Not a guess, not “lower is better.” Work it out from your contribution margin per order and what a first order is worth to you over time.

If you don’t know this number, stop here. Every decision below depends on it.

Step 2: Set the kill threshold at 3 to 4 times target CPA

Every ad gets a budget it’s allowed to spend before it has to show a conversion. We set that at 3 to 4 times target CPA.

Example: your target CPA is $40. An ad gets $120 to $160 to prove itself. If it spends past that with zero purchases, it’s off. No debate, no “let’s give it the weekend.”

Why that range? Below 3x, you’re killing ads that just haven’t had a fair shot at the auction. Above 4x, you’re paying tuition on a loser.

Step 3: Judge ads that are converting on CPA, not on vibes

Once an ad has conversions, the question changes from “is it alive” to “is it profitable.”

• At or under target CPA: keep it, and start building iterations off it.

• Up to roughly 1.5x target: watch it. Check whether the hook is landing (thumb-stop and hold rates) or whether the problem is further down the funnel.

• Consistently above 1.5x target with real spend behind it: cut it, and write down what you learned.

When to leave it alone

The rule cuts both ways. There are two situations where the right move is to do nothing.

1. The ad is in its first 48 to 72 hours. Meta is still figuring out who to show it to, and recent conversion data keeps getting revised for a few days. A bad first morning tells you almost nothing. Let it reach the threshold.

2. A winner has one bad day. A proven ad with weeks of profitable spend doesn’t die in an afternoon. Look at the trend over 7 days, not the last 24 hours. Turning off a winner resets the learning you paid for.

Why this matters more than any creative trick

High creative volume only works if cutting losers is automatic. Without a kill rule, testing 30 new ads a month just means losing money 30 different ways. With one, every dollar that comes off a loser goes straight onto something proven.

Do this this week

1. Write your target CPA at the top of your ad account notes.

2. Multiply it by 3 and by 4. That’s your kill window.

3. Go through every active ad. Anything past the window with zero purchases goes off today.

4. Anything under 72 hours old, leave it alone.

Want this run on your account?

The 30-Day Profit Pilot puts this system on your Meta account for one month: account rebuild, a fresh batch of tested creative, and a weekly scorecard tied to your CPA. If it doesn’t make sense for where you are, we’ll tell you on the call.