Amazon Negative Keywords: The Complete Guide

Negative keywords are the PPC lever most Amazon sellers either ignore entirely or use incorrectly. The result: 20-40% of your ad budget flows into clicks that will never convert — “free” searchers, wrong product categories, competitor ASINs with no purchase intent.

At Daniks, systematic negative keyword management lowered the ACoS of my Sponsored Products campaigns by an average of 6 percentage points without losing a single profitable search term. The technique is not complicated, but it requires discipline and the Search Term Report as your data foundation.

What Negative Keywords Are and How They Work

A negative keyword tells Amazon: “Do not show my ad when someone searches for this term.” You are defining where your ad should not appear, the opposite of regular keywords that define where it should appear.

Two match types for negative keywords:

Negative Phrase: your ad will not show if the search term contains the negative phrase. Negative phrase keyword “free” blocks “free pot,” “free shipping pot,” “free cookware set.”
Negative Exact: your ad will not show for only this exact search term. Negative exact keyword “free” blocks only the search “free,” not “free shipping pot.”

There is no “Negative Broad” on Amazon. This is a common misconception from Google Ads users making the switch.

When You Need Negative Keywords — The Five Signals

Signal 1: High Impressions, Zero Sales

Open your Search Term Report (Seller Central, Advertising, Reports, Search Term Report, last 60 days). Sort by impressions descending. Search terms with more than 500 impressions and zero orders are candidates for negative keywords.

Signal 2: Clicks Without Conversion on Recurring Terms

Search terms that generate clicks over 4 weeks but never convert are systematic budget burners. A single click without a purchase is normal. Fifteen clicks on “cheap cookware” with zero purchases over 60 days is a pattern.

Signal 3: Wrong Product Category

If you sell stainless steel cookware and your Search Term Report shows “enamel pot” or “ceramic pan,” those are shoppers looking for a different material. They might click but will not buy.

Signal 4: Irrelevant Modifiers

Search terms with modifiers like “used,” “free,” “DIY,” “how to,” or “tutorial” point to users who are not looking to buy.

Signal 5: Competitor ASINs and Brand Names

If your auto campaign is bidding on competitor ASINs or brand names and not converting there, negate them, unless you are deliberately running a conquesting strategy.

Step by Step: Extracting Negative Keywords from the Search Term Report

Step 1: Download the Search Term Report

Seller Central, Advertising, Reports, create a “Search Term” report for the last 60 days. Download it as a CSV.

Step 2: Set Filters

Open the file in Excel or Google Sheets. Apply these filters:

Clicks 10 or more and Orders = 0 — budget burners with enough data
Spend 2x or more your target CPA and Orders = 0 — expensive non-converters

Example: if your target CPA is $5, filter for spend of $10 or more and orders = 0.

Step 3: Classify

Go through the filtered search terms manually. Ask yourself for each one:

Is the search term fundamentally irrelevant to my product? — Negative Phrase (blocks all variations)
Is the search term relevant but specifically does not convert? — Negative Exact (blocks only this one term)

Example: you sell a stainless steel cookware set.

“ceramic pot” — Negative Phrase “ceramic” (you do not sell ceramic, block all variations)
“cookware set 10 piece” — Negative Exact (if you only have a 5-piece set, but “cookware set” itself is relevant)

Step 4: Add Negative Keywords

In Seller Central, go to Advertising, open the campaign, then the “Negative Keywords” tab, and add keywords.

Important: add negative keywords at the campaign level, not the ad group level, when you are certain the term is irrelevant for the entire product. Use ad group level only when the term is problematic in one ad group but could be relevant in another.

The Universal Negative Keyword List for Amazon FBA Sellers

These terms are irrelevant for almost every product. Add them as negative phrase to every new campaign:

free / complimentary
used / second hand / pre-owned
how to / tutorial / instructions
review / test / comparison (if you do not want review searchers)
DIY / homemade / craft
repair / replacement part / spare part (unless you sell replacement parts)
rent / lease / borrow

Check the Search Term Report after two weeks. Sometimes “tutorial” as a phrase unintentionally blocks relevant long-tail terms. Correct to exact if needed.

Negative Keywords in Auto Campaigns: The Most Important Use Case

Auto campaigns are the biggest budget burners because Amazon decides which search terms and ASINs your ad appears for. Without negative keywords, an auto campaign runs like a garden hose without a nozzle: water everywhere, precision nowhere.

My workflow for auto campaigns:

Weeks 1-2: let the auto campaign run, collect data.
Week 3: pull the Search Term Report. Add all non-converting search terms with 8 or more clicks as negatives.
In parallel: move converting search terms from the auto campaign to a manual exact campaign and bid on them deliberately.
Week 5: evaluate the auto campaign again. Negate new non-converters.
Ongoing: repeat every 2 weeks.

This is the “Search Term Harvest” workflow that I also describe in the PPC strategy guide. Negative keywords are the flip side: you harvest winners into manual campaigns and block losers in the auto campaign.

Common Mistakes in Negative Keyword Management

Mistake 1: Negating Too Aggressively

If you negate after 3 clicks and 0 orders, you do not have enough data. At a 10% conversion rate, you statistically need 10 clicks to expect one order. Wait for at least 10-15 clicks before deciding.

Mistake 2: Negative Phrase Instead of Negative Exact

“Pot” as a negative phrase blocks everything containing “pot,” including “stainless steel cookware pot set.” This happens when sellers get frustrated and negate broad terms. Use negative phrase only for terms that are fundamentally irrelevant in every combination.

Mistake 3: Setting and Forgetting Negative Keywords

Your market changes. A search term that did not convert 6 months ago could be relevant today because your listing improved, the season changed, or a competitor dropped out. Review your negative keyword list quarterly and remove entries that no longer make sense.

Mistake 4: Not Synchronizing Negative Keywords Across Campaigns

If you negate a search term in the auto campaign but forget the manual campaign, or vice versa, your budget continues flowing to the same irrelevant traffic through the other channel. Maintain a central list and synchronize it across all campaigns.

What Negative Keywords Cannot Fix

Negative keywords eliminate wasted spend. They do not solve fundamental problems:

Poor conversion rate — if relevant search terms are not converting, the issue is your listing, not your targeting.
CPC too high — negative keywords lower your costs indirectly (less waste), but they do not reduce the click price on relevant keywords.
Wrong product — if your product sits in an oversaturated market, negative keywords will not help against 200 identical listings.

If your ACoS is still above target despite a clean negative list, read the PPC beginners guide for the fundamentals and the TACoS article to understand whether your problem is really with advertising or with organic ranking.