A high ACoS quietly eats your profit, and most of the time it is fixable. The good news is that lowering ACoS is rarely about one big change. It is a handful of specific adjustments that, together, cut wasted spend and push more of your budget toward what actually converts. This guide covers the practical ways to lower your Amazon ACoS without simply slashing spend and losing sales.
Quick Answer
To lower your Amazon ACoS: add negative keywords to cut wasted spend, lower bids on underperforming keywords, move proven keywords into exact match, improve your listing so more clicks convert, and shift budget toward your best-performing campaigns. The fastest wins usually come from cutting waste, not cutting spend across the board.
Key Takeaways
- Negative keywords cut spend on searches that never convert.
- A better-converting listing lowers ACoS without touching bids.
- Lower bids on weak keywords, raise on proven ones.
- Exact match gives tighter control over proven terms.
- Cut waste before cutting spend across the board.
Table of Contents
- First, Know Your Target
- Add Negative Keywords
- Adjust Your Bids
- Fix the Listing, Not Just the Ads
- Restructure for Control
- FAQs
First, Know Your Target ACoS
Before lowering ACoS, know what you are aiming for. Cutting ACoS too far can starve profitable campaigns and lose you sales. Your target should sit comfortably below your break-even ACoS, which is set by your profit margin. We cover this fully in our guide on what a good ACoS is. Once you have a target, these tactics get you there.
Add Negative Keywords
This is usually the fastest win. Pull your search term report and find the searches that got clicks but no sales, or very few. Those are draining budget. Add them as negative keywords so your ads stop showing for them. A single review of your search terms can often cut a meaningful chunk of wasted spend immediately. Learn the full method in our guide on Amazon negative keywords.
Adjust Your Bids by Performance
Not every keyword deserves the same bid. Lower bids on keywords with a high ACoS that are dragging your average up, and consider raising bids on keywords that convert well below your target, since they can profitably take more budget. This rebalancing pushes spend toward what works and away from what does not, lowering your overall ACoS without losing your best sales.
Fix the Listing, Not Just the Ads
Here is what many sellers miss: ACoS is not only an ads problem. If your listing converts poorly, you pay for clicks that do not turn into sales, which inflates ACoS no matter how well you manage bids. Improving your main image, title, and bullets so more clicks convert lowers ACoS directly, because the same ad spend now produces more sales. Often the biggest ACoS win is on the listing, not in Campaign Manager. See our guide on optimizing your listing.
Restructure for Control
If your campaigns are a tangle, you cannot optimize them. Moving your proven, converting keywords into dedicated exact-match campaigns gives you tight control over their bids and budget, while keeping discovery in separate broad or auto campaigns. This structure makes it far easier to push spend toward winners and cap it on the rest. The mechanics are in our guide on manual campaigns.
If lowering ACoS across a whole account is more than you want to manage, that is what we do. Our Amazon PPC management service focuses on cutting waste and improving profitability, and you can see the results on our client results page.
Frequently Asked Questions
How do I lower my Amazon ACoS?
Add negative keywords to cut wasted spend, lower bids on weak keywords while raising them on proven ones, improve your listing so more clicks convert, and restructure campaigns for control. The fastest wins usually come from cutting waste, not slashing spend everywhere.
Why is my ACoS so high?
Common causes are bidding too high, targeting irrelevant search terms, and a listing that converts clicks poorly. A high ACoS during a launch can be intentional, but otherwise it usually points to wasted spend or a conversion problem to fix.
Does improving my listing lower ACoS?
Yes, often significantly. If your listing converts more of its clicks into sales, the same ad spend produces more revenue, which lowers ACoS directly. This is why the biggest ACoS win is sometimes on the listing rather than in the campaigns.
Should I just lower all my bids?
No. Cutting all bids uniformly often reduces your profitable sales along with the waste. Lower bids on high-ACoS keywords specifically, and consider raising them on keywords that convert well below your target.
How quickly can I lower ACoS?
Adding negative keywords can cut wasted spend almost immediately. Bid and listing changes take a couple of weeks to show their full effect as data accumulates. Lowering ACoS sustainably is an ongoing process, not a one-time fix.
Written by the AMZ Scaler Team
Amazon advertising and listing specialists with 5+ years managing PPC and listing optimization for brands across the US, UK, and Canada. We publish what we apply in real seller accounts every day.
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