Running Amazon PPC campaigns without proper keyword control can quickly drain your advertising budget. Your ads might attract clicks from shoppers searching for products you don’t sell, features you don’t offer, or products that are unlikely to convert.
This is where Amazon PPC negative keywords become essential.
Negative keywords help Amazon sellers prevent ads from appearing for unwanted search queries. Instead of spending money on irrelevant traffic, advertisers can focus their budgets on searches more closely aligned with their products and business goals.
However, adding too many negative keywords can also limit visibility and eliminate potentially profitable opportunities.
In this complete 2026 guide, you’ll learn what Amazon PPC negative keywords are, how different negative match types work, how to identify underperforming search terms, and how to use negative targeting to improve campaign efficiency.
What Are Amazon PPC Negative Keywords?
Amazon PPC negative keywords are words or phrases advertisers exclude from their campaigns to prevent ads from appearing for specific customer searches.
Unlike regular keywords, which help determine when ads may appear, negative keywords tell Amazon which searches should not trigger an advertisement.
For example, imagine you’re selling premium stainless steel water bottles on Amazon.
Your ads might appear for search queries such as:
- Stainless steel water bottle
- Plastic water bottle
- Cheap water bottle
- Insulated steel bottle
- Disposable water bottle
Although these searches relate to water bottles, not all shoppers are looking for your product.
If you sell only premium stainless steel bottles, searches for plastic or disposable bottles may attract irrelevant clicks.
Adding relevant negative keywords helps prevent your ads from appearing for those unwanted searches.
Amazon supports negative targeting within Sponsored Products campaigns using both automatic and manual targeting. Negative keyword targeting is also available for eligible Sponsored Brands keyword campaigns.
How Do Negative Keywords Work in Amazon Advertising?
When someone searches for a product on Amazon, the advertising system evaluates eligible ads based on factors including targeting and auction conditions.
Negative keywords introduce an additional restriction.
If a search query matches an applicable negative keyword, your ad becomes ineligible for that query within the scope of the exclusion.
For example:
| Customer Search Term | Negative Keyword | Expected Outcome |
|---|---|---|
| Plastic water bottle | plastic (phrase) | Blocked |
| Premium steel water bottle | plastic (phrase) | Not blocked by this negative |
| Cheap water bottle | cheap water bottle (exact) | Blocked |
| Cheap insulated water bottle | cheap water bottle (exact) | Not blocked by this negative |
These examples illustrate matching behavior rather than guaranteeing whether an ad will otherwise appear.
Negative keywords don’t automatically improve conversion rates. Their value comes from removing unwanted traffic while preserving relevant searches that might generate sales.
Why Are Negative Keywords Important for Amazon PPC?
Successful Amazon advertising involves more than generating clicks. Advertisers need to understand which searches produce profitable orders and which ones consume the advertising budget without delivering meaningful results.
Negative keywords support this process in several ways.
1. Reduce Wasted Advertising Spend
Amazon Sponsored Products generally operate on a cost-per-click model, meaning advertisers pay when shoppers click their ads.
When irrelevant searches repeatedly generate clicks without sales, advertising costs can increase without corresponding revenue.
For example, suppose an irrelevant search term generates 40 clicks at an average CPC of $1.20.
That represents $48 in advertising spend without a sale.
Excluding that search, when the evidence supports doing so, can prevent additional unwanted clicks from the same query.
2. Improve Campaign Traffic Relevance
Not every shopper searching within your product category is a suitable customer.
A seller offering expensive leather office chairs might attract searches for inexpensive plastic chairs.
Negative targeting helps distinguish relevant customer demand from searches that do not match the advertised product.
3. Support Better ACoS and ROAS
Two important Amazon PPC metrics are:
Advertising Cost of Sales (ACoS)
ACoS = (Advertising Spend / Attributed Advertising Sales) × 100
Return on Ad Spend (ROAS)
ROAS = Attributed Advertising Sales / Advertising Spend
For example, a campaign generating $1,000 in attributed ad sales from $250 in advertising spend has:
- ACoS: 25%
- ROAS: 4.0
Removing consistently unproductive traffic may improve these metrics if sales are maintained while spending decreases.
4. Improve Budget Allocation
When campaigns repeatedly spend money on irrelevant searches, less budget may remain for potentially profitable traffic.
Negative keywords can help advertisers redirect spending toward better-performing opportunities.
However, negative targeting should complement bid adjustments, campaign segmentation, and listing optimization rather than replace them.
Amazon PPC Negative Keyword Match Types Explained
Amazon provides two negative keyword match types for Sponsored Products: negative exact and negative phrase.
These match types control how broadly Amazon excludes customer searches.
Negative Exact Match
Negative exact match prevents ads from appearing when a customer searches for the specified keyword or a close variation of it.
This option is useful when one particular search term performs poorly but related searches may still be profitable.
Example:
Your negative exact keyword is:
blue running shoes
| Customer Search | Expected Result |
|---|---|
| Blue running shoes | Blocked |
| Blue running shoe | May be blocked as a close variation |
| Blue running shoes for men | Not blocked by this negative exact |
| Lightweight blue running shoes | Not blocked by this negative exact |
Negative exact offers precise control without unnecessarily excluding every longer search containing the same words.
Best use cases:
- Individual search terms with significant unproductive spend
- Underperforming long-tail queries
- Campaign segmentation and keyword isolation
- Protecting related searches that continue generating sales
Negative Phrase Match
Negative phrase match prevents ads from appearing when the customer search contains the complete negative phrase or a close variation.
This match type covers a wider range of searches than negative exact.
Example:
Your negative phrase keyword is:
plastic bottle
| Customer Search | Expected Result |
|---|---|
| Plastic bottle | Blocked |
| Large plastic bottle | Blocked |
| Plastic bottle for kids | Blocked |
| Stainless steel bottle | Not blocked by this negative |
Negative phrase is particularly useful when an entire category of searches is irrelevant to your product.
However, it requires more caution because broad exclusions can unintentionally remove valuable traffic.
Negative Exact vs. Negative Phrase
| Feature | Negative Exact | Negative Phrase |
|---|---|---|
| Targeting restriction | Narrow | Broader |
| Blocks exact query | Yes | Yes |
| Blocks longer queries containing the phrase | Generally no | Yes |
| Best for | Individual underperforming queries | Repeatedly irrelevant search themes |
| Main risk | Missing other unwanted variations | Accidentally excluding profitable searches |
Amazon’s negative keyword specifications allow negative phrase keywords containing up to four words and negative exact keywords containing up to ten words. Both have an 80-character limit.
An important distinction: regular positive keyword targeting supports broad, phrase, and exact match, but Sponsored Products negative keyword targeting uses negative phrase and negative exact—not negative broad.
How to Find Negative Keywords for Amazon PPC
Finding suitable negative keywords requires analyzing actual customer search behavior rather than guessing which terms might perform poorly.
The most useful starting point is your Amazon Ads search term report.
Step 1: Download Your Amazon Search Term Report
Open Amazon Ads Campaign Manager and navigate to the reporting area.
Select the appropriate Sponsored Products search term report and choose a date range suitable for your campaign.
A 30-day review can provide a useful starting point for established campaigns, although newer or lower-volume campaigns may need a longer observation period.
Search term reports provide information about searches associated with ad clicks and can help identify candidates for negative targeting.
Amazon notes that these reports only include terms that generated at least one click, so their impression totals may differ from Campaign Manager.
Step 2: Identify High-Spend, Low-Conversion Searches
Review key performance indicators, including:
- Customer search terms
- Clicks
- Advertising spend
- Attributed orders
- Attributed sales
- ACoS and ROAS
Look for searches consuming meaningful portions of your budget without generating corresponding sales.
Consider this hypothetical report:
| Search Term | Clicks | Spend | Orders |
|---|---|---|---|
| Stainless steel water bottle | 45 | $54 | 8 |
| Plastic water bottle | 30 | $36 | 0 |
| Insulated metal bottle | 28 | $34 | 5 |
| Disposable water bottle | 25 | $30 | 0 |
| Premium insulated bottle | 20 | $25 | 4 |
In this example, the searches for plastic and disposable bottles are reasonable candidates for exclusion, assuming those products are unrelated to your offer.
By contrast, the searches generating orders deserve further profitability analysis before making changes.
Step 3: Evaluate Search Relevance
A search term with zero sales is not automatically a bad keyword.
Before excluding it, ask:
- Does the shopper’s query accurately describe my product?
- Does the product listing match the customer’s expected price, features, and quality?
- Has the search generated enough clicks to evaluate performance?
- Could poor conversion be caused by a weak listing rather than irrelevant traffic?
For example, a relevant keyword with 10 clicks and zero sales may simply need more data.
Amazon’s Sponsored Products targeting guide recommends evaluating a keyword after it receives at least 20 clicks before deciding whether to add it as a negative target. Treat this as a useful evaluation checkpoint, not an automatic exclusion rule.
Step 4: Separate Irrelevant Searches From Underperforming Searches
This distinction is essential.
Irrelevant searches describe products, features, or customer needs that your product cannot satisfy.
Examples include:
- A search for replacement parts when you sell complete products
- Searches for a different material or incompatible model
- Searches for a product type you don’t offer
Underperforming searches may be relevant to your product but fail to generate sufficient sales.
These require more investigation.
Sometimes lowering a keyword bid or improving the product listing is more appropriate than excluding the search completely.
Step 5: Choose the Appropriate Negative Match Type
Once you’ve identified a candidate, determine whether to block one exact search or a broader group.
Use negative exact when one query has consistently underperformed.
Use negative phrase when the complete phrase represents a category of irrelevant customer intent.
Review existing conversions from related queries before applying broader exclusions.
How to Add Negative Keywords to Amazon PPC Campaigns
After identifying irrelevant or consistently underperforming search terms, the next step is applying negative targeting in Amazon Ads.
Step 1: Open Amazon Ads Campaign Manager
Sign in to your Amazon Ads account and open Campaign Manager.
Select the Sponsored Products campaign you want to optimize.
Step 2: Navigate to Negative Targeting
Open the campaign’s Negative keywords or Negative targeting section. The exact interface labels may vary.
You can apply negative keywords at the campaign or ad group level.
Step 3: Enter Your Negative Keywords
Add the search terms you want to exclude and select either negative exact or negative phrase.
Review your entries to avoid accidentally excluding relevant customer searches.
Step 4: Save and Monitor Performance
Save your changes and continue monitoring the campaign.
Amazon also supports bulk operations for managing negative keywords across campaigns, which can be useful for advertisers handling larger accounts.
Campaign-Level vs. Ad-Group-Level Negative Keywords
Amazon advertisers can choose where to apply negative keywords based on their campaign structure.
Campaign-level negative keywords apply across the relevant campaign. They are appropriate when a search term is unsuitable for every product or ad group within that campaign.
Ad-group-level negative keywords offer narrower control. They are useful when a search term should be excluded from one ad group but remain eligible in another.
For example, imagine a campaign containing two ad groups:
- Ad Group A: Stainless steel water bottles
- Ad Group B: Plastic water bottles
You might exclude the phrase plastic water bottle from Ad Group A while keeping it available to Ad Group B.
Adding that phrase at the campaign level could unnecessarily restrict advertising opportunities for the plastic bottle products.
The goal is to apply exclusions at the narrowest practical level while maintaining a manageable account structure.
Advanced Amazon PPC Negative Keyword Strategies for 2026
Negative targeting becomes especially valuable when combined with a structured campaign optimization process.
1. Use Negative Keywords in Automatic Campaigns
Automatic Sponsored Products campaigns can help discover customer searches and products associated with your listings.
Review search term performance regularly and identify relevant queries worth targeting in manual campaigns.
At the same time, exclude clearly irrelevant searches using negative targeting.
This allows advertisers to continue discovering opportunities while reducing repeated unwanted traffic.
2. Use Negative Keywords for Campaign Segmentation
Some advertisers separate discovery and performance-focused targeting into different campaigns.
For example:
- An automatic campaign discovers search terms.
- A manual broad or phrase campaign tests promising keywords.
- A manual exact campaign focuses on proven search terms.
When a successful query is moved into an exact-match campaign, advertisers may apply a negative exact keyword in the discovery campaign to direct eligible traffic toward the dedicated campaign.
However, this approach does not guarantee that all traffic moves to the new campaign. Amazon’s auctions, budgets, bids, and eligibility conditions still affect delivery.
Before excluding a successful search from its original campaign, confirm that the intended destination campaign is active, eligible, and adequately funded.
3. Evaluate Negative Keywords Against Break-Even ACoS
Profitability provides a more useful benchmark than arbitrary click counts alone.
Suppose a product sells for $40 and has $12 in contribution margin before advertising.
Its illustrative break-even ACoS would be:
Break-even ACoS = ($12 / $40) × 100 = 30%
This means the seller has approximately $12 available for advertising per sale before exhausting that contribution margin.
If a relevant search generates $20 in spend without an attributed order, it deserves investigation.
However, advertisers should also consider attribution delays, conversion history, and whether the search contributes to broader discovery objectives.
A high-spend search may need a bid reduction rather than immediate exclusion.
4. Review Negative Keywords Regularly
Negative keyword optimization should be ongoing.
A practical workflow is to review active campaigns weekly and conduct a deeper performance analysis monthly.
During each review, examine search relevance, spend, attributed orders, profitability, and changes in customer behavior.
For new campaigns, allow sufficient data to accumulate before making aggressive exclusions.
Common Amazon PPC Negative Keyword Mistakes
Even experienced advertisers can make mistakes that reduce campaign visibility.
Adding Negative Keywords Too Early
Excluding relevant searches after only a few unsuccessful clicks may eliminate future sales opportunities.
Consider click volume, spend, product margin, and campaign maturity before acting.
Overusing Negative Phrase Match
Negative phrase targeting can exclude many related searches.
For example, adding running shoes as a negative phrase could block valuable searches such as comfortable running shoes for women.
Use negative phrase primarily when the broader search theme is genuinely unsuitable.
Ignoring Search Term Reports
Without search term analysis, advertisers may continue paying for unwanted traffic.
Review actual customer searches rather than relying solely on the keywords originally added to your campaigns.
Using Negative Keywords Instead of Fixing Listings
Poor conversions are not always caused by targeting.
An uncompetitive price, weak product images, limited reviews, or unclear product descriptions can reduce performance even when shoppers use highly relevant search terms.
Investigate listing problems before excluding valuable traffic.
Forgetting to Review Existing Exclusions
Products, prices, customer preferences, and campaign objectives change over time.
A keyword that was irrelevant six months ago might become suitable after introducing a new product variation.
Periodically audit existing negative keywords to ensure they still support your advertising strategy.
Amazon PPC Negative Keywords Optimization Checklist
Use this checklist when reviewing your campaigns.
- Review Sponsored Products search term reports.
- Identify irrelevant searches and costly non-converting queries.
- Check attributed orders and allow for reporting delays.
- Compare spend with product profitability.
- Choose negative exact or negative phrase carefully.
- Apply exclusions at the correct campaign or ad-group level.
- Check whether related searches are converting.
- Review campaign results after implementing exclusions.
Final Thoughts
Amazon PPC negative keywords are essential for controlling advertising relevance and minimizing unnecessary spending.
However, effective negative targeting requires more than excluding every search that fails to generate immediate sales.
The strongest approach combines search term analysis, profitability metrics, appropriate negative match types, and regular campaign reviews.
Use negative exact for individual underperforming queries, negative phrase for consistently irrelevant search categories, and campaign-level or ad-group-level exclusions according to your campaign structure.
Most importantly, treat negative keyword optimization as part of a broader Amazon PPC strategy that includes bidding, keyword research, listing quality, and performance measurement.
When used carefully, negative keywords can help protect your advertising budget while preserving opportunities to reach customers who are more likely to buy.
Frequently Asked Questions
Negative keywords are words or phrases that prevent Amazon ads from appearing for specific unwanted customer search queries. They help advertisers improve targeting relevance and reduce unnecessary ad spending.
Negative exact blocks a particular search query and its close variations. Negative phrase blocks searches containing the complete excluded phrase or its close variations, making it broader.
There is no universal ideal number. Add keywords based on actual search relevance and performance rather than trying to reach a particular quantity. Amazon’s campaign limits allow up to 10,000 negative keywords at the campaign level and 10,000 at the ad-group level, but most campaigns do not need anything close to these limits.
Yes. Sponsored Products automatic campaigns support negative keyword targeting, allowing advertisers to exclude unwanted searches while continuing automatic targeting for eligible traffic.
A weekly review is a reasonable starting point for active campaigns. High-spend campaigns may benefit from more frequent monitoring, while campaigns with low search volume may require longer evaluation periods.
