What is a Good ROAS for Ecommerce? UK Industry Benchmarks for 2026

What is a Good ROAS for Ecommerce

To be honest, asking “What is a good ROAS?” is a bit like asking “How long is a piece of string?” or “What’s a good price for a house?” without saying if it’s a one-bed flat in Grimsby or a mansion in Mayfair.

I reckon it’s the most misunderstood metric in digital marketing. There is a general vibe that you simply need to hit a 4.0x ROAS (Return on Ad Spend) to be successful. But as time has gone along, I’ve seen plenty of businesses hit that number and still struggle to pay the bills, while others run at a 2.0x and aggressively dominate their market.

In this post, I want to move beyond the vanity numbers. I’ll walk you through the realistic benchmarks we are seeing for 2026, but more importantly, I want to show you three specific scenarios where the "standard" advice is completely wrong.

The 2026 Landscape: Where is the Bar?

Before we dive into the scenarios, let’s look at the average terrain. The aggregate ecommerce ROAS is often cited around 2.87, but the median for many brands is closer to 2.04¹. This suggests a lot of the market is operating on thinner margins than you might expect.

Here is what I’m seeing across specific industries:

But here is where it gets interesting. I believe looking at these averages can be dangerous if you don't understand your own financial "physics."

Scenario Planning: When "Good" ROAS is Actually Bad

To illustrate why a generic benchmark like "4.0x" is a potential liability⁶, let's look at three different business models. I’ve seen variations of all three of these in my time consulting.

Scenario A: The High-Margin Specialist (e.g., Supplements)

Imagine a business selling own-brand vitamins.

• Gross Margin: 85% (It costs them £15 to make a £100 bundle)⁷.
• The Math: Their "Break-Even ROAS" is remarkably low. We calculate this by dividing 1 by the margin (1 ÷ 0.85 = 1.17)⁸.
• The Trap: If this brand aims for the "industry standard" of 4.0x, they are likely under-spending⁹. They are leaving massive growth on the table. They could spend aggressively, hit a 2.0x ROAS, and still be wildly profitable while capturing huge market share¹⁰.
• Verdict: For them, a "good" ROAS might actually be 2.0x.

Scenario B: The Low-Margin Reseller (e.g., Electronics)

Now, take a business reselling branded headphones.

• Gross Margin: 15% (They buy for £85 and sell for £100)¹¹.
• The Math: Their Break-Even ROAS is terrifyingly high: 1 ÷ 0.15 = 6.66¹².
• The Trap: If they hit a 4.0x ROAS—which most agencies would high-five over—they are actually losing money on every single sale¹³. An advertising cost of 25% (which is what 4.0x ROAS implies) wipes out their entire 15% margin¹⁴.
• Verdict: For them, a 4.0x ROAS is catastrophic.

Scenario C: The "Phantom Profit" (Fashion & Returns)

This one hits the nail on the head for many apparel brands.

• Dashboard ROAS: 4.0x.
• The Reality: In fashion, return rates often exceed 30%¹⁵.
• The Math: If you sell £1,000 worth of clothes with £250 ad spend (4.0 ROAS), but £300 of that stock comes back as returns, your actual revenue is £700. Your Net ROAS drops to 2.8.
• Verdict: A "Gross ROAS" of 4.0 is effectively a "Net ROAS" of 2.8. You must factor returns into your targets, or you're fooling yourself.

The Hidden Variables: What Else to Watch?

I suppose it’s not just about the margin. There are other things to be aware of that can skew the numbers significantly.

1. The "Signal Loss" Reality

Since the changes to tracking (iOS14), platforms like Meta (Facebook) often can't see the full picture. We call this "Signal Loss"¹⁶.

• A campaign might report a ROAS of 1.8x in the dashboard.
• In reality, it might be driving a 2.5x return, but the data is lost between the app and the website¹⁷.
• The Fix: This is why I advise looking at MER (Marketing Efficiency Ratio)—your total revenue divided by total ad spend¹⁸. A healthy MER is usually between 3.0 and 4.0¹⁹. It cuts through the attribution noise.

2. The Attribution Window

Be careful with how the platforms grade their own homework.

• View-Through Attribution: Some platforms claim credit for a sale just because a user saw an ad (didn't click) and then bought within 24 hours²⁰.
• If 50% of your reported ROAS comes from "View-Through," your numbers are inflated. These might be people who were going to buy anyway (like retargeting past visitors)²¹.
• Always ask: "Is this a click-based ROAS or a view-based ROAS?" The difference can be massive²².

3. The Cash Multiplier (LTV)

Finally, for consumable brands (beauty, pet food), Day 1 ROAS is just the start.

• If you have a high repeat purchase rate, you might target a "Cash Multiplier" or LTV:CAC ratio of 3:1 over 12 months²³.
• You might break even on the first sale (ROAS 1.0) because you know that customer is worth £300 over the next year²⁴.

Final Thoughts

To be honest, the "good" number isn't 4.0, or 3.0, or 10.0. It is the number that sits safely above your profitability floor ²⁵ and aligns with your cash flow goals.

I appreciate this can be a lot to digest. If you are weighing up your options and feeling unsure about your current targets

Check Your Numbers

Stevie Morris

PPC Consultant Involved in online marketing for the last 25 years first with SEO , Web Development and now for the last 12 years focusing on  PPC & Google Ads