I get asked this a lot. You're already spending money on Google Ads. It's generating leads. So why would you also pay for SEO? Isn't that paying for the same thing twice?
It's a fair question, and it doesn't have a one-size-fits-all answer. But understanding the difference between what Ads gives you and what SEO gives you makes the decision straightforward.
What Google Ads actually gives you
Google Ads gets you to the top of search results immediately, for the specific terms you bid on. You pay per click. Traffic arrives while the campaign is live, and it stops when you turn it off or run out of budget.
The advantages are real. You have precise control over which searches trigger your ads, what geographic area you're targeting, what time of day you show up, and exactly what budget you're spending. You can also see detailed data on what's working and adjust quickly.
But the model has a structural limitation: you're renting visibility. The moment your budget drops, or a competitor outbids you, or you pause the campaign, you disappear from those search results. There's no residual value. Everything you've spent on clicks over the past year has produced leads, but it hasn't built anything.
What SEO actually gives you
SEO builds organic rankings. No click cost, no off-switch. A page that ranks well for a high-intent search phrase will keep generating traffic for months or years, without you paying for each visitor.
The other significant difference is trust. Study after study on search behaviour shows that users click organic results more often than ads for many query types, particularly when they're researching rather than buying immediately. Organic results carry a degree of implied credibility that ads don't. Some users actively skip ads. They won't skip a high-ranking organic result.
SEO also gives you broader coverage. A well-structured website with good content can rank for dozens or hundreds of search phrases. An Ads campaign focuses on the specific terms you're actively bidding on. The organic footprint of a mature SEO strategy is usually far wider.
The trade-off is time. SEO takes months to produce meaningful results. New sites or sites starting from scratch should expect six to twelve months before organic traffic becomes a reliable lead source. That's not a reason to avoid it, but it's the honest expectation.
How they work well together
The most effective use of both channels is to run Ads while SEO compounds in the background.
Ads funds immediate leads, keeping the business growing now. SEO is being built in parallel. Twelve months in, organic traffic is contributing a growing percentage of leads. Over time, the cost per lead from SEO becomes lower than from Ads, because there's no click cost. At that point you might reduce Ads spend, or put the same budget into more competitive Ads terms while organic handles the volume terms.
There's a practical data benefit too. Your Ads account tells you which search terms are converting. That's real commercial data, not guesswork. I use Ads conversion data to prioritise which SEO content to create. If a particular phrase is converting well in Ads, it's worth building organic content around it so you're not always paying for those clicks.
I worked with a North Wales accountancy firm who had been running Google Ads for two years and generating steady enquiries. When we looked at their Search Console data alongside the Ads data, six of their best-converting ad keywords had zero organic presence. We built content around those six terms and, within eight months, four of them ranked on page one. Their paid cost for those terms dropped by around £400 a month as organic took over the volume.
When to prioritise Ads over SEO
If you're a new business with immediate revenue requirements, Ads is the right starting point. SEO won't produce results fast enough to pay the bills in the early months. Ads can generate leads from day one.
If you're in a highly competitive market where strong established brands dominate organic results, Ads gives you a shortcut to visibility that SEO would take years to achieve.
If your product or service is time-sensitive or seasonal, Ads gives you the control to increase or decrease spend precisely when needed. SEO doesn't work on a tap-on, tap-off basis.
Read are Google Ads really expensive? for a realistic look at Ads costs and how to assess whether they're working for your business.
When to prioritise SEO over Ads
If your Ads costs per click are very high (this is common in professional services, legal, financial, and insurance categories), the long-term economics of SEO become compelling quickly. Paying £20-£50 per click in a competitive Google Ads market is expensive. Earning organic traffic for those same searches, over time, can cost a fraction of that on a per-visit basis.
If your budget is genuinely limited and you have to choose, and if you have some patience, SEO tends to give a better long-term return. The compounding nature of organic rankings means a good piece of content from two years ago is still generating leads today.
If brand visibility and trust are priorities, not just immediate lead volume, SEO builds both in ways that Ads cannot. Appearing consistently in organic results for the questions your customers are searching creates an impression of authority that paid ads don't replicate.
If your website isn't currently ranking at all for your core terms, read my website isn't showing up on Google first. There may be technical or content issues to resolve before either channel can work properly.
What about Google's own guidance?
Google has published research showing that paid and organic together produce more clicks than either alone, including a halo effect where appearing in both positions increases click-through rate on both. Running Ads and SEO together isn't doubling up. It's owning more of the available search real estate.
One thing most guides don't mention: organic rankings also make your ads cheaper. Google's Quality Score is partly based on how relevant your landing page is, and a page that already ranks organically is, by definition, one Google trusts for that topic. That trust feeds into a higher Quality Score, which lowers your cost per click. The two channels genuinely reinforce each other in ways that aren't always visible in the reporting.
The honest answer
The ideal situation is running both, but only if you have the budget to do both properly. Half-committing to each produces poor results from both.
If you can only afford one right now, the decision depends on your situation. New business, immediate revenue pressure, or high competition: start with Ads. Established business, longer time horizon, or high ad costs in your sector: SEO is likely the better allocation.
The worst approach is spending a token amount on SEO (not enough to move the needle) while running Ads without tracking which keywords are converting. That's two channels underperforming when they should be reinforcing each other.
If you're trying to figure out the right mix for your business, get in touch via my SEO page or take a look at how I approach Google Ads. The answer depends on where you are, what you're spending, and what you're trying to achieve.
