What should I do when I find a high-bid campaign?
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Quick answer
High-bid Amazon ad campaigns are a common source of wasted spend. The recommended next step is to analyze performance depth before making changes. That means reviewing metrics such as spend, clicks, orders, sales, ROAS, ACoS, CPA, and conversion rate. After that analysis, advertisers typically lower bids where the data supports a reduction and add negative keywords to block irrelevant search terms. This approach prevents budget leakage while preserving campaigns that still convert profitably.
Once a high-bid campaign is identified, the goal is not to lower every bid at once. A cleaner approach is to separate campaigns that are simply expensive from those that are genuinely inefficient, then take action on the clearest waste first.
Start with a deeper performance review
High bids alone are not the problem. A bid is only too high when the cost is not being returned through orders and sales. Review the campaign's recent performance across spend, clicks, orders, sales, ROAS, ACoS, CPA, and conversion rate. Also consider campaign maturity: a newer campaign may need more time before efficiency improves.
The Amz Ad Waste Detector - Amazon Ads Analytics Module is built for this step. It analyzes metrics and can surface bid-down recommendations relative to your target ROAS, helping you separate meaningful inefficiencies from normal variation.
Lower bids and add negative keywords in the right order
Once the data shows where spend is not returning enough value, start with incremental bid reductions on the highest-cost, lowest-converting targets. Do not change every bid at the same time; that makes it harder to tell which adjustment helped. If a campaign has many search terms that spent money without a single order, negative keywords are usually the faster fix.
- Lower bids on keywords or targets with high spend and low conversion relative to the rest of the account.
- Add negative keywords for search terms that are clearly irrelevant or repeatedly fail to convert.
- Track the result over a few days or a full click cycle before making another round of changes.
The Amazon Negative Keyword Tool by Todoza can rank search terms by spend and performance, which makes it easier to prioritize which negatives to add first.
When this matters most
This cleanup process is most useful for accounts with long-running campaigns, rising ACoS, or a high number of search terms that consume budget without producing orders. If you see wasted spend growing while sales stay flat, that is a strong signal to review bids and negatives before scaling budget further.
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Related guides
Once you have a repeatable process for handling high-bid campaigns, you can return to the main guide on finding campaigns with bids that are too high to catch inefficiencies earlier.