Amazon Negative Keywords: The Complete Guide to Cutting Wasted Ad Spend in 2026

A kitchen-gadget seller named Marcus pulled his search term report on a Sunday morning and found something painful. His top Sponsored Products campaign had spent $1,847 in the past 30 days on the search term “wooden spoon for cooking.” His product is a stainless steel garlic press. Zero orders. Zero attributed sales. Just $1,847 lit on fire because Amazon's auto-targeting decided “wooden spoon” was close enough to “kitchen tool” to keep showing his ad.

Marcus is not unusual. Most Amazon sellers are quietly losing 20% to 40% of their ad budget to search terms that will never convert. The fix is not a fancier bid algorithm or a new campaign structure. It is the most boring lever in the entire Amazon advertising console: negative keywords.

This guide covers how to use Amazon negative keywords in 2026 to cut wasted spend, lower your advertising cost of sale (ACoS), and protect your margin as you scale. We will go through the match types, the workflow, the mistakes that quietly cost sellers thousands, and how automation changes the math for sellers who do not have time to babysit search term reports every week.

What Are Amazon Negative Keywords?

Amazon negative keywords are search terms you tell Amazon to never show your ads on. When a shopper types a query that matches a negative keyword in your campaign or ad group, your ad is suppressed for that query. No impression, no click, no spend.

Negative keywords are the inverse of regular keywords. Regular keywords tell Amazon “I want to appear here.” Negative keywords tell Amazon “do not show me here, no matter what.”

They exist for one reason: Amazon's match types are loose. Even an “exact match” keyword can trigger your ad on close variants, plurals, misspellings, and synonyms. Auto-campaigns are looser still. Without negatives, you are paying for traffic Amazon decided was relevant, not traffic you decided was relevant.

Where Negative Keywords Apply

Negative keywords work across the three main ad types:

• Sponsored Products — both auto and manual campaigns
• Sponsored Brands — manual campaigns only
• Sponsored Display — limited to negative ASIN and negative brand targeting, not negative search terms

Inside a campaign, you can apply negatives at the campaign level (blocks across all ad groups) or at the ad group level (blocks only that ad group). Most sellers default to ad group level, which is wrong about half the time. We will get to that.

Why Negative Keywords Matter: The ACoS Math

Negative keywords are the cheapest way to lower ACoS. They cost nothing to add, take seconds to implement, and the impact is immediate and permanent for that search term.

Say your campaign drives 5,000 clicks a month at $0.95 average cost per click. Total spend: $4,750. Your conversion rate on relevant traffic is 11%, but 30% of your clicks are coming from irrelevant search terms that convert at 0.5%. Math:

• Relevant clicks: 3,500 at 11% conversion = 385 orders
• Irrelevant clicks: 1,500 at 0.5% conversion = 7 orders
• Total: 392 orders, $4,750 spend

If your average order value is $32, that is $12,544 in sales. ACoS sits at 37.9%. Painful.

Now add negative keywords that block 80% of the irrelevant traffic. Same budget, but now 4,700 of your 5,000 clicks come from relevant queries. You get roughly 517 orders, $16,544 in sales, same $4,750 spend. ACoS drops to 28.7%.

That is a 9-point ACoS reduction from a single afternoon of work. For a full breakdown of how these numbers compound, see our guide on how to lower ACoS on Amazon.

Negative Keyword Match Types Explained

Amazon offers two negative match types, and they behave differently. Picking the wrong one is one of the most common mistakes new sellers make.

Negative Phrase Match

A negative phrase blocks any search query that contains the words in your negative keyword in the exact order, with anything before or after.

If you add the negative phrase “for kids”, your ad will be blocked from these queries:

• best knife for kids
• knife for kids cooking
• safe knife for kids ages 6 and up

But it will still show on:

• best kitchen knife (does not contain “for kids”)
• kids kitchen knife (the word “for” is missing)

Negative phrase is the workhorse. Most of your negatives should be phrase match because it catches close variants without needing you to enumerate every possible query.

Negative Exact Match

A negative exact blocks only search queries that match your negative keyword word-for-word, with no additional words. Plurals are typically also blocked.

If you add the negative exact “wooden spoon”, your ad will be blocked from:

• wooden spoon
• wooden spoons (plural variant)

But it will still show on:

• wooden spoon for cooking
• best wooden spoon
• wooden spoon set

Negative exact is a scalpel. Use it when a generic term sometimes converts and sometimes does not, and you want to block the standalone version while keeping the longer-tail variants live.

When to Use Each

The default playbook:

• Negative phrase for irrelevant categories, wrong product types, free-search modifiers (“free shipping,” “amazon basics,” “wholesale”), brand mismatches
• Negative exact for one-off bad performers where the longer variants still convert, and for blocking competitor brand names you may want to test against later

How to Add Negative Keywords on Amazon: The Workflow

Here is the practical, step-by-step workflow that experienced sellers run weekly. It takes 30-45 minutes per campaign group when done manually.

Step 1: Pull the Search Term Report

In Seller Central, go to Campaign Manager → Reports → Sponsored Products → Search Term Report. Set the date range to the last 30 days for established campaigns, last 60 days for newer ones. Download as CSV.

Open it in Excel or Google Sheets. The columns that matter are: customer search term, clicks, spend, 7-day total sales, ACoS, and orders.

Step 2: Filter for Money Pits

Sort by spend (descending) and look for any search term where:

• Clicks ≥ 10 and orders = 0 → almost certain negative candidate
• Clicks ≥ 20 and ACoS > 2× your target → strong negative candidate
• Spend > $20 with one or zero orders → review for relevance

These three filters typically surface 80% of the wasted spend in any account. Do not get cute with elaborate scoring at first. The obvious losers are the ones bleeding money.

Step 3: Categorize Each Bad Term

For every term you flagged, ask one question: is this query irrelevant to my product, or is it relevant but underperforming for another reason?

Irrelevant queries (wrong product type, wrong audience, wrong intent) → add as negative.

Relevant queries that just are not converting (might be a price issue, a listing issue, a review-count issue) → do not add as negative. Fix the underlying problem instead.

Marcus's “wooden spoon for cooking” query is irrelevant. He sells a garlic press. Block it. But if his query was “stainless steel garlic press” and it was not converting, blocking it would hide him from his perfect customer. The fix would be a better main image or more reviews, not a negative keyword.

Step 4: Choose the Match Type

For each negative, decide phrase or exact based on the rule from earlier. When in doubt, use phrase. It catches more variants and rarely over-blocks if you are sensible about the words you choose.

Step 5: Apply at the Right Level

Two options:

• Campaign level — blocks across every ad group in that campaign
• Ad group level — blocks only within that ad group

The rule: if a query is irrelevant to the entire product and every ad group inside the campaign, apply at campaign level. If it is irrelevant to one ad group but should still be biddable in another (for example, a research-style ad group), apply at ad group level.

Most sellers default to ad group, which means they have to add the same negative across five ad groups. It is wasted clicks waiting to happen. Default to campaign level unless you have a specific reason to scope down.

Step 6: Monitor for 14 Days

After adding negatives, run another search term report 14 days later. You should see:

• Spend on the blocked terms goes to zero
• Total campaign spend stays similar but shifts to higher-converting terms
• ACoS drops by 3-10 points within the first month

If spend on a blocked term is still trickling in, check that you matched the right level (campaign vs ad group) and that your match type is correct.

For more on optimizing the campaigns themselves once your negatives are in place, see our Sponsored Products optimization guide.

Negative Keywords Across Campaign Types

Different campaign types need different negative strategies. Treating them all the same is one of the bigger leaks in most accounts.

Auto Campaigns

Auto-targeting is where most of the bleeding happens, because Amazon decides what queries to match you to. The negative keyword strategy here is also the most aggressive.

Run search term reports on auto campaigns weekly during the first 90 days, then monthly after. Add negatives liberally. The auto campaign's job is discovery. Once a search term proves itself, you graduate it to a manual campaign and add it as a negative on the auto so you do not pay for the same click twice.

This auto-to-manual workflow is one of the most underused tactics in PPC. We covered it in detail in our guide to auto vs manual campaigns on Amazon.

Manual Broad Match Campaigns

Broad match keywords trigger your ad on related and synonym queries, which is great for discovery but expensive without negatives. The same negatives you build for auto campaigns generally apply to broad match too.

A common pattern: a seller runs broad match on “garlic press” and ends up paying for “garlic powder,” “garlic peeler,” “press for shoes,” and “garlic supplement.” Add each as a negative phrase as soon as you see five wasted clicks.

Manual Phrase and Exact Match Campaigns

Phrase and exact match campaigns are tighter, but they are not airtight. Amazon's “close variant” matching means even exact match can trigger on plurals, misspellings, and word reorderings.

Sellers often think exact-match campaigns do not need negatives. They do. Pull the search term report, scan for any query that is not literally your target keyword, and decide if it should be blocked. The volume is lower than auto or broad, but the spend per term is also higher because exact-match bids are usually higher.

Sponsored Brands

Sponsored Brands has its own negative keyword list. Build it the same way: pull the search term report, identify wasted spend, add phrase or exact negatives at the campaign level. Sponsored Brands negatives only support phrase and exact, so the workflow is simpler.

Common Negative Keyword Mistakes That Quietly Kill Performance

After auditing hundreds of seller accounts, the same mistakes keep showing up. Avoid these and you are ahead of 90% of competitors.

Mistake 1: Adding Negatives at the Wrong Level

A seller adds “for kids” as an ad group negative in their adult-knife ad group, thinking they are protected. But the same campaign has another ad group for kitchen tools that does not have the negative, and “for kids” queries keep matching there. Result: wasted spend continues, just shifted to a different ad group. Default to campaign level when a term is irrelevant to the whole product.

Mistake 2: Blocking Brand Terms Too Aggressively

A new seller sees a competitor brand name showing up in their search term report and immediately adds it as a negative. But that competitor's customers are exactly the people the seller wants to reach. Competitor brand queries often convert well because the shopper has high commercial intent and is comparison shopping.

If a competitor brand query has poor ACoS, the fix is usually a better creative or lower bid, not a negative. Block competitor brands only if you have tested them and confirmed they do not convert at any reasonable bid.

Mistake 3: Negativing Your Own Variants

A seller of yoga mats has variants in different colors. They see the search “purple yoga mat” in their report under their blue mat ad group, with no orders. They add “purple” as a negative. Now their blue ad group is also blocked from “purple stripe yoga mat” and any other shopper using “purple” descriptively. The right fix was to point those queries to the purple variant, not to block the color word entirely.

Mistake 4: Building a Static Negative List and Walking Away

Negative keyword lists need regular maintenance. New search terms keep appearing as Amazon's auto-targeting evolves and new shopper behavior emerges. A negative list built in January 2025 is leaking spend by July 2025. Pull search term reports at least monthly for established campaigns, weekly for new ones.

Mistake 5: Confusing Low Conversion With Irrelevant

If a search term has 100 clicks and 2 orders, that is a 2% conversion rate. Bad, but maybe fixable. If the query is genuinely relevant (“stainless steel garlic press” for a garlic press seller), the 2% conversion rate is a listing problem, a price problem, or a review problem. Adding it as a negative hides you from your real audience.

Run a proper search term audit before deciding whether a low-converting term should be a negative or a fix-the-listing trigger.

How Daniks.AI Automates Negative Keyword Management

Manual negative keyword management is mind-numbing, slow, and only as accurate as your last 30 minutes of attention. The math is straightforward but the work scales linearly with your campaign count. Sellers running 20+ campaigns across 200+ ASINs cannot keep up by hand.

Daniks.AI runs search term analysis 24/7 across every campaign in your account. The system pulls performance data on every customer search term, applies a configurable threshold (default: 15 clicks with zero orders, or ACoS at 2× your target), and adds negatives automatically with the right match type and at the right level.

The math on automation is simple. A seller spending $5,000 a month on PPC who reduces wasted spend by 25% saves $1,250 a month. A Daniks.AI Lite plan is $49 a month. The autopilot pays for itself 25 times over the first month. Start your free 14-day trial to see what your account looks like with negatives running themselves.

Frequently Asked Questions

How many negative keywords should I have per campaign?

There is no upper limit. Amazon allows hundreds. The right number is whatever stops your wasted spend without over-blocking relevant traffic. Most established campaigns settle in at 30-100 negatives.

Should I add negative keywords to a brand-new campaign?

Yes, but conservatively. A brand-new campaign has no data, so blocking aggressively cuts off discovery. Start with obvious irrelevant terms (wrong product types, wrong materials, “free” modifiers) and let the campaign run for 14-30 days before adding more.

Do negative keywords lower my impressions on Amazon?

Yes, intentionally. Each negative keyword removes you from queries you do not want to appear on. Total impressions drop, but total relevant impressions stay the same or grow as your bid budget shifts to higher-quality traffic.

Can negative keywords hurt my organic ranking?

No. Negative keywords only affect paid placements. They do not change your organic search ranking on Amazon. The indirect benefit is that better PPC conversion rate (from cleaner traffic) feeds the A9 algorithm with stronger conversion signals, which can lift organic rank.

What is the difference between negative keywords and negative ASINs?

Negative keywords block search queries. Negative ASINs (used in product targeting and Sponsored Display) block your ad from appearing on specific competitor product detail pages. Different tools, both useful.

Cutting the Right Spend, Not the Right Customers

Marcus, the kitchen-gadget seller, pulled his search term report the next Sunday after our first call. He added 23 negative phrase keywords across his auto campaign and adjusted his bid strategy on three branded queries that were genuinely converting. Two weeks later, his ACoS had dropped from 38% to 26%. Same budget, 31% more orders.

Negative keywords are not glamorous. They will not get you a viral case study on LinkedIn. But they are the single highest-leverage hour you can spend on your PPC each week, and the only PPC lever where the work is permanent. A negative you add today is still saving money two years from now.

If you want every search term report reviewed, every wasted click flagged, and every negative added at the right level without you ever opening a spreadsheet, that is what we built Daniks.AI to do. Set your ACoS target. Connect your Seller Central. Let the autopilot run while you focus on the parts of your business that need a human.