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Amazon EU Metrics Are Wrong: Why Your ACOS is Lying

Published on May 27, 2026

About this video

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Learn why Amazon advertising metrics in EU and UK show incorrect numbers and how this impacts your campaign profitability. This video explains the critical VAT calculation issues that affect Amazon PPC performance in European markets.

If you're running Amazon ads in EU or UK, you need to understand that Campaign Manager shows ad spend without VAT but displays ad sales with VAT included. This creates misleading ACOS calculations that can hurt your profitability analysis.

For example, in Italy where VAT is 22%, your Campaign Manager might show 20% ACOS, but your real net sales ACOS could actually be 24.4%. That 4.4% difference can be a game changer for sellers with tight margins.

This video covers essential Amazon advertising concepts including ACOS calculations, break even analysis, and how to properly account for VAT in your Amazon PPC campaigns. You'll learn the difference between optimizing campaigns using Campaign Manager metrics versus calculating true profitability.

Key insights for Amazon advertising in European markets: Campaign Manager displays ad spend without VAT while showing ad sales with VAT, creating calculation discrepancies. Your invoices will include VAT on ad spend, adding another layer of complexity. Business reports show gross sales, but combining them with advertising reports requires careful VAT consideration.

For daily Amazon PPC optimization, continue using Campaign Manager metrics, but when calculating profitability and break even ACOS, factor in VAT properly. Tools like Sellerboard can help mitigate these calculation risks by including VAT adjustments.

This affects all Amazon advertising formats including Amazon sponsored products, sponsored brands, and other Amazon ads in EU markets. Understanding these metrics is crucial for Amazon advertising agencies and sellers managing their own Amazon PPC campaigns.

Contents: 00:00 Amazon EU Metrics Are Wrong 00:24 Campaign Manager vs Invoice Discrepancy 01:13 ACOS Calculation Example Italy 02:32 Break Even ACOS Considerations 03:19 Profitability vs Optimization 03:46 Tools and Solutions

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Transcript

Hi, so as the title suggests, Amazon metrics in EU are wrong. So this is something that you have to have in mind whenever you are advertising in EU or UK because when you look at the metrics in campaign manager, that's something completely different from what you'll be seeing on your invoices for the ads. So stay with me. This doesn't only apply to what you're seeing in campaign manager, but also applies to how you're calculating your break even a cost. If your margins are not that tight and you have enough of the room to play with the ads, then you're not that endangered. But if your margins are tight, then this is something that you really have to take into consideration and maybe even redo your numbers. Just as an example, when you open up your campaign manager, your ad spend is shown without VAT. But then again, the ad sales are shown with VAT. So let's say your a cost can be shown as 20% and in reality is 24%. Easy as that. That means that 4% difference in margin that can be a make or break for some. So this is something and by the way when you get the invoice you get the invoice with ad spend with VAT. So that's additional layer of complications that you may experience in expand when expanding into EU or already selling and you I'm not telling you that you shouldn't be expanding your business from US to EU. I'm just saying there are some things that you have to consider and think twice about your metrics or even hire somebody who's much better than than you in that area. Another thing that you should consider is that in business reports you're seeing gross sales. So that's fine. But also many people combine these two reports. So they take business reports and combine them with advertising reports. But you have to to take that into consideration especially if you're calculating the the total a cost and stuff if that's your main metric you have to take into consideration the VAT where the VAT is applied where it's not applied but majority of cases where people go wrong is when they calculate their break even a cost and as I said if margins are tight this is something really really important I cannot emphasize this enough so let's take one example let's say in Italy where the VAT is 22% believe it or not take this scenario in as as shown over here. So 500 reported it ad sales and ad spend for the sake of simplicity let's say 100. So your a cost should be 20%. But if net sales are without a cost then it means that your net sales are 4 409 something then your real net sales a cost is 24.4%. This 4% can be a gamecher for some of you unfortunately and if you calculate this correctly then again you could be also gaining additional 4.4% if your calculations are fine. So the biggest takeaway is not to go into panic. Use your a cost numbers in your campaign manager in your tools to optimize campaigns. But once you calculate your profitability, that's where you need to factor in the VAT as well. So those are two different areas to focus on. Unfortunately, we cannot change anything in in campaign manager. But there are some tools out there available which can mitigate the risk by having these already included. Sellerboard is really good with that and there are few others. So for profitability, make sure to calculate VAT proper properly. But for daily optimization, stick to what's shown in the campaign manager, but have in mind the actual number. Let me know if this was clear and see you tomorrow in the next video.

Frequently asked questions

Why do Amazon Campaign Manager metrics show incorrect ACoS for EU and UK sellers?

Campaign Manager displays ad spend excluding VAT but shows ad sales including VAT. This mismatch means the ACoS figure in Campaign Manager is artificially lower than it actually is in net terms. Using Italy as an example, where VAT is 22%: if Campaign Manager shows $500 in ad sales and $100 in ad spend, the reported ACoS is 20%. But the net sales after removing the 22% VAT element are around €409, which means the real net ACoS is approximately 24.4%. That 4.4% difference can determine whether a campaign is profitable or not for sellers with tight margins.

How should EU and UK sellers approach ACoS in two different contexts: daily optimization and profitability analysis?

For daily campaign optimization (adjusting bids, pausing keywords, managing budgets), continue using the Campaign Manager figures as your reference because they are consistent and comparable day over day even if they are not net-adjusted. For profitability calculations, break-even ACoS analysis, and any decisions about whether a product or campaign is actually making money, factor in the VAT correctly. Using the Campaign Manager ACoS for profitability decisions without adjusting for VAT will make campaigns look more profitable than they are, which can lead to incorrect break-even targets and margin miscalculations.

What additional VAT complication should EU and UK sellers be aware of when combining business reports with advertising reports?

Amazon's business reports show gross sales including VAT, while advertising reports show ad spend excluding VAT. When sellers combine these two data sources to calculate Total ACoS or overall profitability, the inconsistency between gross sales figures and net ad spend figures creates a further distortion. Tools such as Sellerboard can help manage these discrepancies by incorporating VAT adjustments into their calculations, but sellers doing manual analysis need to be explicit about which numbers are gross and which are net before drawing any conclusions about profitability.