How to Reduce Your ACoS: 4 Strategies to Try in 2025

ACoS (Advertising Cost of Sale), the ratio of ad spend to ad sales, quantifies the effectiveness of every dollar spent on Amazon ads. Amazon sellers and brands try to maintain low ACoS as a guiding beacon to profitability. A high ACoS signifies inefficient spending, which leads to lower profit margins. 

In the past few years, Amazon PPC advertising has become increasingly expensive, making maintaining ACoS difficult. This is because the Cost Per Click (CPC) is rising.

According to data, Amazon CPC increased by 18.75% between 2023 and 2024, resulting in a significant rise in advertising costs. 

However, some advanced strategies can help eliminate wasteful spends and lower ACoS, making advertising campaigns more profitable. 

In this post, I will give you a complete guide to reducing Amazon ACoS, including best practices. 

Let’s dive into it, shall we?

Advanced Strategies to Reduce ACoS 

As competition in the Amazon marketplace increases and CPCs continue to rise, maintaining a profitable ACoS is necessary for sustainable growth. Here are some data-driven strategies to help sellers maximize returns while minimizing ad spend.

Strategy 1: Be Retail Aware

You will be surprised that the first three strategies to lower Amazon Advertising ACoS have nothing to do with advertising, yet they have everything to do with advertising. Let’s discuss.

1.1 Prioritize the Right ASINs to Advertise

You want to move your inventory as fast as you can.

So, what do you do?

You end up advertising your slow movers, thinking that the fast-moving ASINs will move fast anyway, so why advertise.

OR

You advertise all your ASINs.

Except that it is a recipe for disaster. While I was at Amazon, our studies revealed that 40% of the success of Amazon PPC ads depends on which ASINs you advertise. That is why we used to send out notifications to brands, sellers, and agencies on high-converting ASINs that were missed out on advertising.

High converting ASINs or high selling ASINs will increase your sell-through rate on Amazon. AT THE LOWEST ACoS.

For instance, below are two different accounts. 

Account 1 has no ASIN prioritization. Spends are “almost” equally divided into Band A, Band B, and Band C ASINs. 

Account 2 has prioritized top-selling ASINs by spending 46% of the ad money on Band A ASINs. 

Notice how ACoS for Band A ASINs is lower than ACoS for Band B and Band C ASINs. The higher the spend on low ACoS ASINs, the better your overall average ACoS. This will also show in your total sales revenue. 

Account 2, therefore, has a better ACoS despite spending more on advertising.

Using tools like atom11, you can monitor, change and track percentage spends by ASIN Bands. This will not only help you lower your ACoS, but also increase ad sales.  

You can also learn more about ASIN prioritization and its impact on ad revenue in this ASIN targeting guide.

1.2 Content Optimization

Content optimization focuses on increasing organic conversion rates, making more organic sales with the same number of clicks. It involves focusing on product image, title name, detail page bullet points, and A+ content.

Here is a quick description:

(a) Product Image

What if I give you a mantra to power-pack your main image so it is a Click-Magnet?!

The mantra is “USE THE DEAD SPACE.”

Use dead space to SPECIFY at least one of the following: 

• Grammage: Example: 100 gm pack, 60 pack 

• Ingredients/flavors/colors: Example: Contains Vitamin E, Orange Flavor 

• Functionality: Example: Cookie Sheet, Cotton Towels 

• Tools/Packaging: Show packaging 

• Selling Point/USP: Any specific USP that differentiates you from the competition.

Let’s call it the G.I.F.T.S framework.

See below, an example of Zulay Kitchen accessory which shows all colors available for the product, functionality (frother), packaging, as well as USP (lifetime warranty).

Ensure you use other images well to show “how to use”, “how you are different from others," and “Use cases—what problem is your product solving and how.”

(b) Product Title

Stick to the following points while framing your product title:

• Start with the most essential information. For example, your brand name, sub category, usage value, i.e., how can your product be used.

• Include relevant keywords and frame them in a sentence. Stick to the sequence that you would use to find your product. Conduct keyword research and use Amazon’s high search keywords to see what sequences are used most.  

• Use title case. The first letter of every word should be capitalized.

(c)  Product Description

Your product description should answer the following questions:

• What is the product?

• What is it made of? 

• Where is it used?

• What are the dimensions (if relevant)?

• Who is the customer? Men/women/pets/babies, etc.

• What are the primary product benefits?

(d) A+ Content

A+ content gives your products a 5-20% conversion boost. If you do not already have A+ content added to your products, do so today. If you have one, keep experimenting with it (especially for your top 5 products) to increase conversions. 

We had a detailed conversation with @Fatos Fatin, MD of Maxamaze, a content optimization company, on Premium A+ Content. 

Watch this detailed conversation here: Detailed conversation with Fatos Fatin

1.3 Other Retail Signals

Far too many people talk about it, but no one tells you what it is to be retail aware. Here are a few examples:

(a) Inventory

Are you still advertising when you have low stock? This will lead to faster sell-outs and out-of-stock situations. And Amazon will penalize you for this by removing you from your search results rank for days, even after you return to stock. Simple rules like the ones below can help you keep your inventory and save yourself from higher ACoS.

If Days on Hand is less than 15 days, pause the product ad. When Days on Hand is greater than 15 days, unpause the product ad.

atom11’s recommendation engine can help you stay on top of your inventory updates ASIN by ASIN so you can take actions at the right time.

(b) PPC Cannibalization

Are you spending money on PPC ads when you are already at the top of search results in the Amazon search ranks? 

Set up your rules so you can reduce the top of search placement adjustment in such cases. This will minimize unnecessary spend from your advertising budgets and improve your ACoS. 

(c) Traffic

Do you ever analyse the search frequency rank trends for your keywords? If not, you absolutely should. You’ll get seasonality insights like “Shampoo keyword search picks up in early March”. Not only this will help you plan inventory in advance, but also help you keep ACoS as you can increase/decrease advertising intensity on important keywords using this data.

Strategy 2: Overall Optimization

2.1 Dayparting

Dayparting is my second favorite advertising strategy (after ASIN prioritization) that helps maintain ACoS. 

Dayparting means adjusting your bids at different times of the day and week. The idea is to spend less ad money at the "time of the day" or "day of the week" when conversions are low and more aggressively when conversions are high. 

For example, if mornings aren't great for sales but evenings are, you'd lower your ad spending in the mornings and allocate more budget for the evenings when you make more sales for the same amount spent. 

In the screenshot below, you can see that the brand sells most on Sundays and has minimal conversion during afternoons. So, to control ACoS, they should typically increase budgets for all advertising campaigns on Sundays and reduce bids during afternoons.

With atom11, you can set up dayparting campaigns and keyword optimization based on time of the day performance. You can define your scope, set up your parameters and custom rules and check hourly performance.

If you want to understand how to set up dayparting, read about it in our blog on efficient dayparting strategy for Amazon ads. 

2.2 Audit for Maximum Impact

The best way to keep ACoS in control is to find what works for you. For example, check on campaign type, keyword match type, or placement that gives the best results. Once you know what works, you can double down on that strategy and keep ACoS in check.

Set your processes up to ensure this data is available at the drop of a hat because data availability solves half the problem. Normally, to audit a spend profile and its effectiveness, you will need to download seven different reports, which will cost you time and resources. With atom11, you can get this report on a daily basis. 

We have discussed a detailed way of auditing your ads account in this blog post: Data Driven Approach to Amazon Ad Optimization.

Strategy 3: Keywords and Audiences 

One way to maintain ACoS is to focus on the right keywords and audiences. Frequently add good keywords, update your performing keywords in your PPC campaigns, and negate the ones that don’t work. 

3.1 Use Long Tail Keywords

Harvest keywords from your automatic and manual campaigns and add them to new or existing ones. Here are a few ways you can implement it using atom11:

(a) Longtail Strategy

Longtail keywords are keywords with less volume but very high relevance. For example, the keyword “Shoe” is a generic keyword with high relevance, high volume, and, of course, very high competition. A long-tail keyword for “Shoe” could be “Red gumboots for heavy rain.” Longtail keywords perform great as they are less expensive and generate good sales. You can find longtail keywords/search terms from your automatic campaigns. 

(b) Keyword Harvesting

Keep harvesting keywords from your auto, phrase, and broad keywords and add them to current or new campaigns. These are usually search terms with more than three orders in the last 7-14 days.

Let’s see how you can do it through an Amazon advertising software like atom11:

(i) Automate Keyword Harvesting 

This eliminates the headache of manually adding and harvesting keywords, as atom11 will harvest keywords that are performing well and add them to your Amazon campaigns.

(ii) Manual Harvesting

The best thing about manual harvesting is that you can avoid keyword stuffing in one campaign. atom11 will harvest keywords that are not added to any campaign, and with one click, you can add those keywords to either current campaign OR create a new campaign and add them there.

3.2  Negate Frequently

Amazon is becoming increasingly upper funnel. Earlier, only auto, broad, and phrase match keywords resulted in multiple search terms, but now even exact match keywords generate new search terms.

Many of these search terms do not result in sales but continue to consume your budget. Identifying and removing these negative keywords frequently can be a good way to keep your ACoS in check. 

There are two strategies that you can use to negate: 

(a) Relevance Check: Let’s say you sell Hair Oil. Then the relevant negation would be “cooking oil” or “automobile oil.” This is plainly relevance-based and not based on any data. 

(b) CAC-Based: You have to check your cost per customer acquisition for every keyword. If your keyword spends more than the target CAC, it should be optimized for the bid. If the keyword is spending 4- 5X your target CAC, it should be negated. You can easily automate search term negation through atom11 (similar to keyword harvesting).

Strategy 4: Bids and Budgets

4.1 Optimize your Bids

We all know that we should decrease bids if performance is bad and increase bids if performance is good. But did you know that this is only partly true? 

You never hear the Amazon Ads gurus talk about the second most important aspect while changing bids: CPC/Bid ratio. 

If CPC = $1 and Bid = $10

The CPC/Bid ratio of the keyword is 0.1.

For a high-performing keyword, you do not need to change the bids of such a keyword as it will not bring in additional impressions. However, it may increase your CPC if Amazon implements false floor bids on your keywords.

For a low-performing keyword, you cannot make subtle bid changes of 10% in such cases. You have to make drastic changes. This means a 30% or 40% bid reduction to control ACoS. 

Hence, use the following thumb rule: 

• For high-performing keywords: If ACoS < Target ACoS * 0.5 AND CPC/Bid > 0.6, then increase bid.

• For low-performing keywords: If ACoS > Target ACoS * 1.2 AND CPC/Bid < 0.1, then decrease bid by 30%.

Learn ways to improve your bidding strategy with this ‘Amazon Bidding Strategies Guide.’ 

4.2 Budget Optimization

One quick way to slash your ACoS is to rationalize budgets across high and low-performing campaigns. It almost immediately gives you better results. In the meantime, you can work on placement optimization or conversion optimization of the products that weren’t performing well.

You can reduce low-performing campaign budgets by 50-75% to achieve your desired target ACoS. But do keep in mind that this should be done for campaigns that are at least 1.5-2X above your target ACoS and are generating <X orders in the last 30 days (X could be 1-4 orders or 5X less than average orders/campaigns).

4.3 Placement Optimization

There are three placements on Amazon–top of search, rest of search, and product detail page. Each placement has its own importance and performance potential for a brand–given its product quality, product placement, reviews, ratings etc. So you should adjust the bidding according to your account's placement performance.

In atom11, we recommend low and high-performing placements so that you can adjust them according to your ACoS targets.

Learn more about Amazon Ad Placements and how they impact brand awareness and overall sales. 

Conclusion

Implementing these four strategies will help you lower ACoS and improve your overall campaign performance and key metrics. It will ensure that your ads reach the right people with the right bid amount and generate relevant leads that ultimately convert into loyal customers.

Whether you're a seasoned seller or a new brand getting started with Amazon Vendor Central, these strategies will help you reduce your total advertising cost and maximize your advertising budget. 

So, start improving your ACoS with a powerful tool like atom11. This tool gives you the best of both worlds—automation and manual curation of strategies to lower your ACoS. If you need help implementing this, you can schedule a call with us or book a demo to see atom11 in action. 

FAQs

How do I lower my ACoS?

To lower ACoS, find the right keywords for your product listings and optimize your product titles, descriptions, etc. You can also optimize your bids and advertising budget and use dayparting and inventory-based ad optimization strategies to improve your ACoS. 

Tools like atom11 make improving ACoS easier as it combines retail signals with advanced automations, like dayparting and bid management, to help achieve the best results.

What is a good ACoS ratio?

A good ACoS ratio is between 15% and 25%. However, it may vary depending on industry, business size, product margins, and other factors. 

Is 100% ACoS acceptable?

A 100% ACoS indicates breakeven, meaning your ad spend is equal to the amount of sales generated. While this no-profit, no-loss zone is good for short-term goals like increasing brand awareness or reviews, it is not beneficial in the long run. 

Is lower ACoS better?

Yes. A lower ACoS is typically better as it indicates an efficient ad spend. It shows that the seller generates more sales per dollar spent on ads. This means better profitability and a higher overall ROI.

Why is my ACoS so high?

A high ACoS (Advertising Cost of Sale) can occur due to factors like targeting highly competitive keywords, low conversion rates, or poor ad relevancy. To lower ACoS, optimize your targeting, improve your product listings, and refine your bidding strategy.