What is a good ROAS for e-commerce Google Ads campaigns?

Return on Ad Spend, or ROAS, is the most direct performance metric for e-commerce advertisers running Google Ads campaigns. Yet a "good ROAS" is not a universal number. What counts as an excellent result for one online store can be loss-making for another. In this article, we explain exactly what ROAS means, which benchmarks apply in 2026 across different e-commerce sectors, how to set the right target for your specific situation, and which strategies deliver structurally better results.

What is ROAS and how do you calculate it?

ROAS stands for Return on Ad Spend and tells you how much revenue you generate for every euro or dollar spent on advertising. The calculation is straightforward: divide your advertising revenue by your advertising costs. A ROAS of 400% means you earn four euros in revenue for every euro invested, expressed as a 4x multiplier.

The formula is: ROAS = (ad revenue / ad spend) x 100%. If you spend 1,000 euros on Google Ads and generate 5,000 euros in revenue, your ROAS is 500% or 5x. While the calculation is simple, the real value lies in interpretation. A ROAS of 5x is only truly good if your profit margins support it.

It is therefore essential to always evaluate ROAS in the context of your gross margin. A webshop selling products at a 20% margin has a break-even ROAS of 500%. Everything above that threshold is profitable. A webshop with a 50% margin has a break-even ROAS of just 200%. The threshold depends entirely on your own business model, which is why comparing ROAS figures across different businesses is rarely meaningful.

What is a good ROAS benchmark in 2026?

In the e-commerce world, a ROAS of 400% or 4x is often cited as a general starting point. However, this benchmark is a significant oversimplification. In 2026, strong Google Ads campaigns in e-commerce typically achieve between 400% and 800% ROAS, depending on the sector, product category, and the maturity of the advertising account.

For sectors with high product prices and low margins, such as electronics or large household appliances, a ROAS of 3x to 4x can already be excellent. For digital products or online courses, where variable costs are near zero, ROAS values of 8x to 12x are achievable. Consider a platform like ToetsJeKennis.nl, which offers online study materials and practice tests. With minimal product costs, a large portion of every euro in ad revenue contributes directly to profitability. Campaigns for ToetsJeKennis.nl are therefore optimised to targets that reflect the high-margin structure of digital products, not a generic sector average.

Sector comparison: ROAS benchmarks by category

This table illustrates why comparing ROAS values between sectors provides very little insight. A fashion retailer achieving 450% ROAS is performing excellently. An electronics retailer with the same 450% ROAS may be operating at a loss if their purchase margins are thin. Always map out your own financial structure before setting a ROAS target.

Key factors that influence your ROAS

A high ROAS is not solely the result of the right bidding strategy. Multiple factors play a decisive role in the final return on ad spend. By systematically improving these factors, you can structurally increase your ROAS without simply adding more budget.

The conversion rate of your landing page has a direct and significant impact on your ROAS. If your conversion rate doubles while cost per click remains the same, your ROAS automatically doubles as well. This makes Conversion Rate Optimisation one of the most impactful investments alongside campaign optimisation. Fast loading times, clear product descriptions, strong social proof, and a smooth checkout process all significantly improve conversion rates.

Keyword quality and the degree to which search terms align with purchase intent largely determines how much you pay per click and how likely that click is to result in a sale. Keywords with clear transactional intent, such as "buy [product] online" or "[product] order", convert significantly better than broad exploratory terms. Smart Bidding helps you place the right bid at the right moment for keywords with the highest purchase probability.

For Shopping campaigns, the quality of your product feed is a critical success factor. A feed with optimised product titles, accurate category classification, competitive pricing, and high-quality images generates significantly higher click-through rates and better search positions. Advertisers who invest in feed optimisation see on average 35% more impressions and a noticeably higher return on ad spend on their Shopping campaigns.

Strategies to structurally improve your ROAS

There are proven strategies that e-commerce advertisers use in 2026 to steadily increase their ROAS. The most impactful approaches include:

• Segment campaigns by margin: Create separate campaigns for high-margin and low-margin products. This allows you to set an appropriate ROAS target per segment and prevents budgets from flowing towards less profitable product groups.
• Use audience segmentation and remarketing lists: Visitors who have previously browsed your website or made a purchase convert at significantly lower costs. Increasing bids for these segments substantially improves your average ROAS.
• Continuously optimise negative keywords: Irrelevant search queries consume budget without generating revenue. By reviewing your search terms weekly and excluding irrelevant ones, you reduce wasted spend and automatically improve ROAS.
• Implement dynamic conversion values: By passing margin data to Google Ads, the algorithm can optimise on actual profitability rather than revenue alone.
• Leverage Performance Max with high-quality assets: Performance Max campaigns perform significantly better when fed with quality product images, compelling ad copy, and a well-segmented product feed.

For ToetsJeKennis.nl, a platform for online practice tests and study materials, the combination of targeted campaign segmentation, continuous keyword optimisation, and dynamic conversion values has led to a structurally higher ROAS on their Google Ads campaigns. By splitting campaigns per product category and per audience segment (new visitors versus returning users), each sub-strategy could be independently optimised for the most relevant objective.

The role of Smart Bidding in achieving ROAS targets

Target ROAS, or tROAS, is the bidding strategy within Google Ads that instructs the algorithm to generate as much ad revenue as possible for every euro spent, at a specific ROAS target. The system uses machine learning to set an optimal bid at every moment, taking into account dozens of signals including device, location, time of day, search term, and user behaviour.

For tROAS to work effectively, certain conditions must be met. Your Google Ads account needs sufficient conversion data for the algorithm to learn properly. As a rule of thumb, aim for at least 30 to 50 conversions per month per campaign before switching to an automated bidding strategy. With too little data, the algorithm risks overfitting and making suboptimal decisions.

Do not set your ROAS target too high when starting out. A target that is far above your historical average causes the algorithm to bid too conservatively, reducing volume. Start with a target close to your historical performance and gradually increase it once the system has demonstrated it can reliably hit the goal. Our approach at AdBrains includes a structured build-up phase where tROAS targets are raised step by step based on campaign performance.

ROAS versus other KPIs: a complete picture

ROAS is a powerful KPI, but it is not a complete measure of campaign success. If you optimise solely on ROAS, you risk missing valuable growth opportunities. A campaign achieving a lower ROAS but attracting significant new customers with high lifetime value can be more valuable in the long run than a campaign with a high ROAS that primarily re-converts existing customers.

• Cost per Acquisition (CPA): How much does it cost to win one new customer? Relevant when customer growth takes priority over short-term revenue.
• Lifetime Value (LTV): The total revenue a customer generates over their entire relationship with your business. A high LTV justifies a lower ROAS on the first purchase.
• New Customer Acquisition Rate: What percentage of your conversions are new customers? Google Ads offers the ability to place higher value on new customer conversions within your bidding strategy.
• Impression Share: What share of relevant searches are you appearing in? A low impression share may indicate that your ROAS target is too restrictive and is limiting your reach and volume.

The most successful e-commerce advertisers in 2026 use a combined approach where ROAS serves as the primary efficiency metric, supplemented by LTV data and new customer value as growth objectives. This enables them to grow profitably on both a short-term and long-term basis.

Frequently asked questions about ROAS for e-commerce

What is a good ROAS for an average online store?

There is no universal answer, but a ROAS of 400% or 4x is often cited as a general starting point for e-commerce campaigns. Whether this is sufficient depends entirely on your gross margin. A webshop with a 50% margin has a break-even ROAS of 200%, meaning 400% is already substantially profitable. A webshop with a 20% margin has a break-even ROAS of 500%, making 400% loss-making. Always calculate your own break-even ROAS based on your margins before setting a target.

How can I improve my ROAS without increasing my budget?

Improving ROAS without additional budget is very achievable by focusing on efficiency. The most effective measures are: excluding irrelevant search terms through negative keywords, improving the conversion rate on your landing page, optimising your product feed for Shopping campaigns, segmenting campaigns by product margin, and refining your audience strategy. Each of these optimisations either lowers cost per conversion or increases average order value, both of which directly improve ROAS.

When is a lower ROAS still acceptable?

A lower ROAS can be justified when you are deliberately investing in acquiring new customers with high lifetime value. If a new customer returns on average three times and generates strong margins on each return purchase, it makes sense to accept a lower ROAS on the first acquisition. This also applies to seasonal campaigns focused on building market share, or to brand awareness initiatives that indirectly contribute to higher conversion rates at later touchpoints.

What is the difference between ROAS and ROI?

ROAS compares advertising revenue with advertising costs and does not account for other costs such as purchase price, shipping, or operational expenses. ROI, Return on Investment, looks at net profitability relative to total investment including all costs. ROAS is therefore an operational campaign KPI that quickly reveals the efficiency of advertising spend, while ROI is a broader measure of overall business profitability. Both metrics are valuable and complementary. Visit our FAQ for more practical guidance on campaign settings and targets.