I had a call recently with a marketing manager who told me their Google Ads return had quietly shrunk over the past year, despite the campaigns themselves barely changing. That’s not a coincidence or bad luck, it’s exactly what the current data shows happening across e-commerce paid media right now, and it’s precisely why this comparison matters more this year than it has in a while.
I’m Myles, Director at Essheo. I’ve managed paid budgets alongside SEO strategy for a business that scaled past £65 million in turnover, so this isn’t a comparison I’m making from theory, it’s one I’ve lived on both sides of. Here’s the honest breakdown of where each channel stands right now, and why the answer for most e-commerce brands isn’t as simple as picking one.
How Much More Expensive Have Paid Ads Become?
This is the part of the conversation that’s changed most dramatically over the past year, and it’s worth understanding the scale of the shift before anything else.
Cost Per Click Is Rising Faster Than Conversion Rates
Cost per click across Google Shopping and Performance Max rose 15% year on year between June 2025 and June 2026, whilst average return on ad spend contracted 46% on Performance Max and 43% on Standard Shopping over the same period, driven by rising click costs paired with falling conversion rates.
Average e-commerce search CPC has climbed from around £1.45 to £1.65 over the past year, a roughly 13 to 15% increase, with Shopping CPC rising even faster at around 22% due largely to increased competition on Performance Max.
The Increase Varies Sharply by Category
CPC inflation isn’t uniform across e-commerce, it’s fastest in high margin categories where more advertisers compete for the same profitable queries, with Health and Beauty CPCs up around 11% and Electronics up around 14% year on year.
Fashion and Apparel has seen comparatively modest inflation of around 3%, showing just how much this varies depending on your specific vertical. If you’re in a higher margin category, this is a trend worth watching closely, because the auction dynamics working against you are structural, not temporary.
How Does SEO’s Cost Structure Compare Over Time?
This is where the two channels diverge most fundamentally, and understanding why matters more than simply comparing headline numbers at a single point in time.
Paid Spend Resets, SEO Compounds
A paid campaign costing £5,000 a month produces roughly £5,000 worth of traffic value for that month only, stop paying and you’re back to zero immediately.
An e-commerce SEO investment of the same £5,000 a month might take six months to gain genuine traction, but by month twelve, it could be generating traffic worth considerably more than what’s being spent, because the relationship between paid spend and results is linear whilst SEO’s relationship is exponential, slow initially, then accelerating as authority and rankings build.
The Multi-Year ROI Curve in Numbers
E-commerce SEO ROI grows from around 0.8x at six months to 5.2x at thirty six months or more, as content and authority compound over time. Over a twenty four month window specifically, SEO delivers a customer acquisition cost around 62% lower than paid search, though it’s worth being honest that SEO isn’t free, it’s deferred cost, with only around 1.74% of newly published pages reaching Google’s top ten within their first year.
That statistic alone is worth sitting with, SEO’s compounding advantage is real, but it rewards patience and consistent execution far more than it rewards urgency.
Which Channel Actually Converts Better?
Cost is only half of this comparison. What happens once a visitor arrives matters just as much, and the data here tells a more nuanced story than either channel’s advocates usually admit.
Paid Traffic Converts Faster, Organic Traffic Converts More Reliably
Paid traffic tends to convert somewhat faster upon arrival, but SEO generated leads close at a notably higher overall rate, around 14.6% for SEO compared to roughly 3.75% for PPC depending on industry.
Organic results also carry a trust advantage, users are around 8.5 times more likely to click an organic result over a paid one when both appear for the same query, reflecting a lingering scepticism toward ads that shows no sign of disappearing.
Why Combining Both Often Outperforms Either Alone
Brands appearing in both paid and organic results for the same query see a 38% increase in organic click through rate and a 39% increase in paid click through rate simultaneously, and businesses running both channels together see 27% more conversions than those relying on paid advertising alone.
This is genuinely one of the more compelling arguments for a blended strategy rather than an either or decision, the two channels appear to reinforce each other’s credibility when they show up together.
Is There Still a Genuine Case for Paid Ads?
I want to be fair here, because dismissing paid media entirely would ignore exactly where it still earns its place in a sensible e-commerce strategy.
Paid Ads Win Decisively on Speed
Paid ads deliver traffic within 24 to 48 hours of launch, compared to SEO’s typical three to twelve month runway before meaningful results appear.
For a genuinely new product launch, a time sensitive promotion, or a new e-commerce store that needs revenue immediately rather than in six months, paid Google Shopping remains the faster, more reliable lever, particularly for low competition categories where Shopping CPCs can still sit as low as £0.40 to £1.60.
New Stores Often Need Paid Ads to Bridge the Gap
Newer e-commerce stores frequently need paid ads simply to survive their first year whilst SEO authority builds in the background, only unlocking their lowest customer acquisition costs through organic search once that authority has genuinely established itself.
This is precisely why we support clients with paid media at Essheo as a secondary channel, useful for bridging exactly this gap, rather than treating it as the primary long term growth strategy.
What Does AI Search Add to This Comparison Now?
This is the variable that’s changed the calculation most significantly in the past year, and it’s one that fundamentally favours organic visibility in a way paid media currently cannot replicate.
AI Referral Traffic Is Growing Far Faster Than Either Traditional Channel
AI referral traffic to retail sites is up 558% as one measure of this shift, whilst B2B paid search CPC has risen 29% and organic click through rate on affected queries has fallen around 26% over the same period.
That’s an enormous divergence, one emerging channel growing by multiples whilst the two established channels both face rising costs and falling efficiency in different ways.
There Is No Paid Equivalent to an AI Citation
You cannot currently buy your way into an AI Overview summary or a ChatGPT recommendation the way you can buy a spot in Google’s paid results.
That visibility has to be earned through structured, genuinely helpful content and real authority signals, and it’s exactly why we built Essheo around Search Everywhere Optimisation, covering Google, AI platforms, YouTube, and the forums that large language models cite from, treating this as core strategy rather than a future consideration to worry about later.
So Which Should Your E-commerce Business Actually Choose?
Bringing this back to a practical decision, the honest answer for most established e-commerce brands is a thoughtful combination of both, weighted according to your specific stage and category.
A Sensible Default Weighting
If you’re newer or launching a specific product, weight toward paid initially whilst building SEO in parallel so it’s compounding by the time you need to reduce paid dependency. If you’re an established brand with existing traffic and rising CPCs eating into margin, weight more heavily toward SEO, using paid tactically for launches, promotions, and gaps SEO genuinely can’t fill quickly enough.
A blended approach reduces overall cost per lead by roughly a third compared to a paid only strategy, and lowers overall customer acquisition cost by around 20% compared to running either channel in isolation.
Why This Decision Shouldn’t Be Made in Isolation
Getting this weighting right depends heavily on your specific category’s CPC trends, your current organic baseline, and how quickly your competitors are moving on both fronts, which is exactly the kind of assessment that benefits from an outside, experienced perspective rather than a generic rule applied without context.
Ready to Get the Right Balance for Your Business?
We built Essheo specifically to help e-commerce brands navigate exactly this decision, treating SEO as the primary compounding growth channel whilst using paid media as a smart, secondary support rather than the default answer to every traffic problem.
Our clients have generated over £45 million in combined revenue over the last two years, and every senior practitioner on our team brings 8+ years of experience each, ranking against genuinely tough competition including household names like MoneySuperMarket, GoCompare, and uSwitch.
If you’re a marketing manager or decision maker trying to work out the right balance between SEO and paid advertising for your specific business, I’d rather map that out with real numbers than give you a generic rule of thumb.
Book your free E-commerce SEO strategy call with me today, and let’s build a strategy that gets the balance right.