If an ad spends twice your target CPA with zero conversions, kill it immediately. Common excuses like Meta still learning or good click rates are avoidance. An ad that can't deliver one conversion at 2x spend has a broken message or audience, and more money won't fix it.
Here's one rule that has saved me thousands of dollars across pretty much every account I've managed. If an ad spends 2 times your target CPA without getting a single conversion, you kill it. No exceptions. So if your target CPA is $30 and an ad spends $60 with nothing to show for it, that ad is done. I see people break this rule all the time. They'll say, Meta is still learning, or the click-through rate looks good, or maybe it just needs a little more time. But most of the time, that's just an excuse to avoid making the call. What's usually happening is pretty simple. If an ad can't get even one conversion after spending 2 times your target CPA, the message probably isn't landing, or the traffic it's pulling in is not the right fit. Spending more usually does not fix that; it just burns more money. And honestly, the hardest part is emotional. You spend time on the ad, you like the creative, you wanted it to work, but the data does not care if it hits that number with zero conversions. You kill it and move on. Because that same budget could be going into new creatives that actually have a shot. Now, if an ad is around 1.5 times target CPA and you're seeing a few conversions come through, that's different. That might still be worth holding a little longer. But 0 conversions at 2 times target CPA is usually a very clear no. That's why you set the rule before the ad ever goes live. You decide the kill point in advance. So when the moment comes, you're not making the decision based on hope. You're just following the rule. 2 times target CPA, 0 conversions, kill it and move on.
