POAS Bidding… Why POAS Instead of ROAS?

A campaign with a ROAS of 5:1 (500%) may look like a jackpot — but in reality, it can be unprofitable.

But what if the products you sold have low margins and shipping or other variable costs consume most of the revenue?

In that case, the campaign looks successful based on ROAS but profit is minimal or even negative.

That’s exactly why it’s important to pay attention to another metric: POAS (Profit on Ad Spend).

ROAS (Return on Ad Spend) is one of the most widely used metrics in digital marketing. Its purpose is to answer a basic question: how much revenue does advertising generate for every euro invested? It’s a quick indicator of campaign efficiency from a revenue perspective – not a profit perspective.

ROAS can tell you that advertising is generating revenue efficiently and that some campaigns drive higher turnover than others.

The problem arises when you evaluate performance exclusively through ROAS. This metric does not consider whether you actually made money. It does not include product costs, shipping, warehousing, discounts, returns, or payment fees. As a result, ROAS may look excellent – but with low margins, the campaign can actually be loss-making.

POAS (Profit on Ad Spend) takes things a crucial step further. Instead of focusing on revenue, it measures the actual net profit generated by advertising after deducting all relevant costs. This provides a much more accurate picture of real campaign performance from a business perspective.

So:

• If POAS is higher than 1, every euro invested in advertising generates net profit.

• If POAS is lower than 1, it means that even with growing revenue, the e-shop is actually losing money.

That’s why POAS better reflects true business performance. POAS captures the real impact of advertising on profitability, allows you to prioritize higher-margin campaigns, and reveals situations where campaigns look good based on ROAS but fail to generate real value.

…Two Perspectives on the Same Problem

ROAS and POAS may appear similar, but they answer completely different questions.

As competition increases, customer acquisition costs rise and margins shrink. In such an environment, e-shops can no longer optimize campaigns based solely on revenue. Automated campaigns, such as Performance Max, often prioritize higher-priced products — not necessarily more profitable ones.

POAS allows you to scale campaigns intelligently. It helps you invest only in segments with real profit potential and reduce wasted budget on products or campaigns that sell but do not earn.

POAS as a necessity, not an alternative…

ROAS remains a useful metric for evaluating sales volume. However, in today’s competitive e-commerce environment, net profit is what truly matters. POAS enables intelligent budget allocation, scalable profitability, and reduced waste.

“ROAS tells you that advertising is selling. POAS tells you whether it’s actually worth it.”

For an e-shop that wants to grow profitably – not just quickly – POAS is not an alternative. It’s a necessity.