19/06/2026
I used to check one number after every campaign. That one mistake cost my client thousands.
The number was ACOS.
Just ACOS. Nothing else.
I thought I was being diligent.
I was actually flying blind.
Here is what nobody told me when I started managing Amazon PPC.
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"If ACOS is low, campaigns are profitable."
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Low ACOS means nothing if organic sales are collapsing. A 12% ACOS with zero organic growth is a ticking time bomb. TACOS tells you the real story.
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"High ROAS always means you are winning."
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A 9x ROAS on a low margin product can still mean you are losing money. ROAS without margin context is just a pretty number on a dashboard.
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"TACOS above 10% means something is wrong."
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During launch phase 35-50% TACOS is completely normal. Cutting spend here is like turning off the engine right before the highway.
So what are the real numbers that actually matter?
ACOS โ Ad Cost of Sale
Below 15%? Scale immediately.
Above 40%? Pause low converters now.
New launch? Give yourself 30 days at 35-50% before panicking.
TACOS โ Total ACOS
Under 10%? You are profitable. Push harder.
10-20%? Healthy. Optimize weekly, never cut.
Above 20%? Your organic rank is weak. Fix the listing first.
ROAS โ Return on Ad Spend
Below 3x? You are losing money on Amazon. Full stop.
4-6x? Solid. Scale carefully.
Above 7x? Room to push bids higher right now.
I rebuilt my entire weekly review around these three metrics.
Every Monday morning now:
Check ACOS by campaign โ pause anything above 45%.
Review TACOS versus last week โ is organic actually growing?
Find campaigns below 3x ROAS โ cut bids 15% immediately.
Scale budgets on campaigns hitting target ACOS.
Log every change in a Google Sheet.
That one habit turned a bleeding account into a scaling one.
The sellers who master all three metrics together do not just survive on Amazon.
They compound.
๐พ Save this for your next weekly review.
โป๏ธ Repost if you know a seller only watching ACOS.
๐ Comment "METRICS" and I'll send you my full weekly review checklist.