How to Structure an Amazon Ads Account That Doesn't Haemorrhage Budget

Amazon advertising has a reputation for being easy to start and difficult to make profitable. That reputation is largely earned.

The platform makes it genuinely simple to launch a Sponsored Products campaign in minutes — add some products, set a budget, let Amazon's automatic targeting get to work. And it will get to work, spending your budget reliably and consistently. Whether it's spending it on searches that are actually likely to convert at a margin-positive ACOS is a different question entirely.

The difference between an Amazon Ads account that quietly drains budget and one that compounds profitably over time is almost always structural. It's the campaign architecture decisions made at setup that determine whether you have visibility and control over your spend — or whether Amazon's algorithm is making the important decisions for you.

Understanding the Amazon Ads ecosystem

Amazon DSP

The Demand-Side Platform is Amazon's programmatic advertising offering — display and video ads served across Amazon's own properties and third-party publisher networks. DSP operates on a CPM model rather than CPC, requires significantly higher budget minimums, and is primarily suited to larger brands with established Amazon presence. It's not the right starting point for most sellers.

The auto vs manual targeting decision

Automatic targeting

Amazon decides which search terms and products to show your ads against, based on your listing content. It's broad, it casts a wide net, and in the early stages of a product launch it can surface search terms you'd never have thought to target manually. That makes it genuinely useful as a discovery tool — but a poor choice as your primary campaign type, because you have limited control over where the budget goes.

Manual targeting

You choose exactly which keywords or products to target, and at what bid. Manual targeting gives you the control needed to allocate budget towards your highest-converting, most margin-positive search terms. It's more work to set up and maintain, but it's where profitable accounts are built.

The recommended approach for most sellers is to run both simultaneously but for different purposes. Use automatic campaigns to mine for new search terms — regularly harvesting the search term report to identify terms that are converting well. Then take those terms and add them as exact or phrase match keywords into your manual campaigns, where you can control the bid properly.

Campaign structure: organise by intent and match type

The most common structural mistake in Amazon Ads is mixing match types within the same campaign. This makes it almost impossible to control where your budget goes or to diagnose what's working.

Exact match campaigns

Your highest-priority, best-converting search terms. These should receive the most budget and your highest bids, because you know exactly what's being searched and you've established that it converts. Exact match campaigns should be lean and focused — your top 20 to 50 terms, actively managed.

Phrase match campaigns

Broader than exact, allowing your ads to appear for searches containing your keyword phrase alongside additional words. Useful for capturing variations of your core terms without the full breadth of broad match. Bids should typically be lower than exact match, with active negative keyword management to filter irrelevant variations.

Broad match and automatic campaigns

The discovery layer — casting the widest net to find new converting terms. Budgets here should be more conservative, and the search term report needs to be reviewed regularly so that winning terms are graduated to exact or phrase match campaigns and irrelevant terms are negated.

ACOS, TACOS, and knowing your profitable threshold

ACOS — Advertising Cost of Sale — is the primary performance metric in Amazon Ads. It represents your ad spend as a percentage of the revenue those ads directly generated. A 20% ACOS means you spent £20 in ads for every £100 of attributed sales.

The critical number is your break-even ACOS — the point at which your ad spend equals your margin. If you sell a product for £50, it costs £25 to source and fulfil, and Amazon takes a 15% referral fee (£7.50), your margin before advertising is £17.50, or 35% of the sale price. Your break-even ACOS is therefore 35%. Your target ACOS should sit meaningfully below break-even to leave room for actual profit.

TACOS — Total Advertising Cost of Sale — is a broader and often more useful metric. It measures ad spend against total revenue including organic sales, rather than just the sales directly attributed to ads. Because Amazon advertising drives organic ranking improvements over time, a campaign that looks expensive on ACOS alone may be delivering strong TACOS once the organic uplift is factored in.

Negative keywords: the most underused lever in Amazon Ads

In Google Ads, negative keywords are considered a basic discipline. In Amazon Ads, they're frequently neglected entirely — and the cost of that neglect is significant.

Without negative keywords, your automatic and broad match campaigns will spend budget on searches that have nothing to do with what you sell. The search term report — available within each campaign — shows exactly which searches your ads appeared against and what they cost. Reviewing this weekly and negating irrelevant terms is one of the highest-return activities in Amazon account management. It directly reduces wasted spend and improves ACOS without requiring any change to bids or budgets.

Product targeting: competing where it matters

Alongside keyword targeting, Amazon allows you to target specific products and categories — placing your ads on competitor product detail pages or on listings for complementary products. Targeting competitor ASINs directly allows you to place a Sponsored Products or Sponsored Display ad on a competitor's listing — appearing as an alternative to someone who is actively looking at a similar product. The intent is high, the audience is qualified, and if your listing offers a better proposition, this can be a cost-effective way to capture switching buyers.

The listing quality problem no campaign can fix

No amount of campaign structure sophistication can rescue a poorly optimised product listing. Amazon ads drive traffic to your listing — but it's the listing that converts that traffic into a sale. If your main image is poor, your title is keyword-stuffed and hard to read, or your review count lags significantly behind competitors, your conversion rate will be low regardless of how well-structured your campaigns are.

The checklist before scaling ecommerce ad spend:

Main image is clean, professional, and shows the product clearly on a white background
Title includes primary keywords naturally and reads clearly rather than being a keyword dump
Bullet points address the buyer's key questions and objections, not just product features
A+ content is in place if brand registered
Review count and rating are competitive for the category
Price is competitive — not necessarily the cheapest, but not so far above comparable products that conversion rate is structurally compromised

Structure first, spend second

The pattern in underperforming Amazon Ads accounts is almost always the same: automatic campaigns running without negative keywords, match types mixed together without clear logic, budgets allocated by default rather than by performance, and listings that haven't been optimised for conversion.

Getting the structure right — separating match types, running auto campaigns as discovery tools, maintaining a disciplined negative keyword practice, and knowing your break-even ACOS before you set a single bid — creates an account you can actually manage. From there, scaling is a process of doubling down on what the data confirms is working.

If you'd like help putting any of this into practice for your own campaigns, get in touch or book a free discovery call.