How Much Should I Reduce Bids at Once?
← Back to Amazon Ads Bulk Bid Changes: How Much Is Too Much at Once?
Quick answer
A measured Amazon Ads bid reduction is a controlled adjustment made in small, reviewable steps instead of one aggressive cut. This method limits sudden visibility loss, preserves useful impression share, and makes it easier to see what changed. The right size depends on current performance, margin targets, and how quickly you can review results, but the practical goal is to remove enough waste to improve efficiency without stripping away the traffic data needed for the next decision.
In practice, many advertisers use a 10–20% reduction as a starting range for underperforming targets, while tighter accounts may call for smaller moves. The key is to avoid trying to fix a poor campaign with one drastic change. Below is a practical way to size bid reductions and track the result.
Start With a 10–20% Reduction Range
There is no single best number for every account, but a 10–20% cut is a common review range for bids or targets that are clearly overspending relative to sales. If the advertised product has thin margins or existing volume is already low, a smaller 5–10% reduction is often a safer place to begin. On the other hand, if wasted spend is severe and the campaign still converts, a 15–20% reduction may be reasonable when you can review the results soon after.
- Use a smaller cut when current volume is already limited or margins are thin.
- Use a mid-range cut when a target is spending meaningfully but missing ROAS goals.
- Avoid large blanket cuts until you can isolate which keywords or products are actually driving waste.
Review the Data Before the Next Move
After you reduce bids, let enough clicks and impressions accumulate before changing again. A quick second cut can hide whether the first adjustment actually helped. Use a reporting view such as the Amazon Ads Dashboard by Todoza to compare spend, sales, ROAS, and wasted spend before and after the reduction.
- Compare the same metric window before and after the change.
- Watch for a drop in orders that is larger than the drop in spend.
- If the change reduces waste without hurting profitable sales, you have found a workable level.
When This Matters
This approach matters most when you are making bulk bid changes across many keywords, ad groups, or campaigns. A series of small reductions is easier to reverse and understand than a large, simultaneous change that removes both waste and useful traffic. If a search term is spending without converting, check whether a negative keyword is a more precise fix before lowering the entire ad group bid. Amazon Negative Keyword Tool by Todoza can help surface those underperforming queries for manual review.
Related products
Related guides
Reducing bids in measured steps keeps bulk changes from becoming an accidental account-wide reset. For a broader look at pacing and sizing those adjustments across campaigns, return to the main Amazon Ads bulk bid changes guide.