How Amazon PPC works: the practical guide I wish I'd read when I started

What Pay Per Click really means on Amazon

I started working with Amazon PPC in 2018. A friend and I wanted to launch a brand. Nobody explained anything to us. I burned weeks of budget on poorly configured campaigns. This guide is what I wish I’d read back then.

Since 2018 I’ve managed campaigns for 50+ brands across 22 categories. I’ve seen the same mistakes repeat every time. You’ll find them all below, with real numbers.

On Amazon every search generates an internal SERP. At the top of that page there are paid positions. You bid to occupy them. If someone clicks, you pay. If they don’t click, you pay nothing.

The key difference compared to organic visibility: sales generated by PPC improve the BSR (Best Seller Rank). A higher BSR means more organic visibility in subsequent searches. PPC isn’t just advertising. It’s also a ranking accelerator, especially in the first months of a launch.

The auction mechanism explained with a numeric example

Imagine three sellers bidding on the keyword “men’s running shoes”:

• Seller A bids €0.55
• Seller B bids €0.45
• Seller C bids €0.38

Seller A wins the position. But doesn’t pay €0.55. Pays about one cent more than the second-place bid, so around €0.46. This is called a second-price auction.

Practical result: you pay less than you’re willing to pay. But if your bid is too low, you don’t show up. Finding the right bid requires data, not intuition.

The three Amazon ad types and when to use them

All three formats are managed from the official Amazon Advertising console. Here’s when to use each one.

ACoS and TACoS, the only two metrics you need to watch every day

Everyone looks at impressions, clicks, sales. Very few look at the metrics that actually matter. That’s why many brands keep investing in PPC without knowing if they’re making or losing money.

How to calculate your breakeven ACoS

ACoS (Advertising Cost of Sale) = (ad spend / attributed sales) x 100

Concrete example: you spent €100 on ads and generated €500 of attributed sales. ACoS is 20%.

Your breakeven ACoS equals your gross margin percentage. If the product margin is 40%, you can spend up to 40% of sales on advertising without losing money. Beyond that limit, you’re working at a loss.

In 2019 I worked with a home decor brand. ACoS was at 12%. It looked great. The problem was gross margin sat at 15%. I was almost breaking even after Amazon FBA fees, logistics, and ad cost. Net margin near zero.

I built a calculator to save you from the same mistake.

Why TACoS tells you if you’re growing or just buying visibility

TACoS (Total Advertising Cost of Sale) = (ad spend / total sales) x 100

The difference is in the denominator. ACoS divides by sales generated by advertising only. TACoS divides by total sales, organic and paid together.

The sufficiency threshold for a healthy account averages 15%. Below that, organic carries on its own and PPC is doing its job. Above, it depends on the phase: during launch it’s normal to stay above, at steady state it isn’t.

Realistic ACoS thresholds by category

There’s no universal “good” ACoS. It depends on product margin and campaign goal. Some practical guidance based on what I’ve seen in 8 years:

• Beauty and skincare, target ACoS typically 20-35%, high margins allow more flexibility
• Consumer electronics, low margins, sustainable ACoS often below 15%
• Supplements and pharma, high margins, ACoS 30-45% can be sustainable with the right numbers
• Home decor and kitchen, variable, depends heavily on price point and competition

I worked with a beauty brand at 60% ACoS in the first month. Looked like a disaster. After 90 days of optimizing negatives, listing, and bids, it dropped to 22%. Product margin was 55%, so we were well in profit. The initial 60% was high, but not unsustainable during launch.

Broad, phrase, and exact are not the same thing

This is the mistake I see most often. Sellers using only broad match and wondering why they spend without selling. Match types determine which real queries your ad shows for. Getting them wrong means paying for irrelevant traffic.

The sequence I always use with new brands:

1. Auto or broad/phrase campaign to collect data on real buyer queries
2. Search Term Report analysis after 14-21 days
3. Manual exact campaign with profitable keywords extracted from the report
4. Adding irrelevant queries as negative keywords in the discovery campaign

Don’t open an exact campaign on day one. You don’t have the data yet to know what actually converts.

The campaign structure I use for new brands

In 2018 I managed my first campaigns without a defined structure. Only automatic campaigns, €15/day budget, targeting everything. After 21 days I’d spent €315 with an 84% ACoS. I hadn’t added a single negative. Amazon was showing my ads for absurd queries.

Today I always use the same starting structure.

The Search Term Report doesn’t just give you ad keywords. It tells you which real queries drive sales. It’s one of the few free pieces of data on actual buyer behavior on Amazon. Use it every week, not once and forget.

Listing comes before PPC, always

Spending on PPC with a poor listing is like paying to bring people into a dark store. They arrive, don’t understand what you’re selling, leave. You paid for the click. You didn’t get the sale.

No Amazon PPC article ever mentions this. PPC amplifies what already works. It doesn’t save a listing that doesn’t convert. Amazon’s algorithm optimizes for conversions: if your ad generates clicks but no orders, ad quality drops over time. You pay more for worse results.

I’ve seen brands with ACoS above 70% not because of the campaigns, but because of listings with smartphone photos and bullet points copied straight from the supplier. The problem wasn’t PPC. It was how the product was presented.

I covered how I learned this in detail in the article about how I started selling on Amazon.

How much budget you need to start without wasting money

The question I get most often. Nobody answers it directly. Let me try.

Under €10/day on Sponsored Products you don’t collect statistically useful data within 30 days. It’s not an opinion. It’s math.

With €10/day you have €300/month. At an average CPC of €0.40-0.60 on Amazon.it you get 500-750 monthly clicks. Enough for a first serious analysis.

The ideal budget for a serious launch is €20-30/day for the first 60 days. It lets you collect data, optimize campaigns, and build organic ranking at the same time.

If you have less than €300 total to invest in advertising, wait. Build up budget before starting. Otherwise you risk spending €200 without collecting enough data to make decisions.

Stable results with on-target ACoS: between 60 and 90 days for most products. Anyone promising concrete results in 2 weeks is selling something that isn’t serious consulting.

The mistakes I see most often (and that I made myself)

What to do after the first 30 days of campaigns

You have 30 days of data. Now you have something to work with.

Filter the Search Term Report by queries with sales and high click count but relatively low spend. These are often keywords that convert both organically and paid. Add them to the listing title or bullet points. You strengthen organic positioning without spending more ad budget.

Raise the budget only if ACoS is below your breakeven and TACoS is dropping over time. If you raise with ACoS above breakeven, you multiply losses, not profits.

A clear positive signal: campaigns that exhaust the daily budget before 2pm. It means there’s demand. Raise budget by 20-30% and monitor ACoS for the next 7 days.

After 30-60 days you have enough data to build a more articulated campaign structure. Match type separated campaigns, single product campaigns, portfolio campaigns to manage budget across multiple ASINs.

You’ll find more practical insights in the Amazon blog section of this site. If you want to understand where your account is losing budget, you can write me from the Amazon page. I’ve seen enough accounts to spot the patterns within minutes.