SEO SEA
If you are managing a search budget below £5,000 a month, build SEO first and use SEA only for the 10% of keywords where organic is impossible to win quickly.
Start here
- Audit your current search performance using Google Search Console and Google Ads to see where organic is already winning and where you are paying for clicks.
- Map your target keywords by commercial intent: use SEA for high-intent transactional queries where you lack organic ranking, and SEO for informational and navigational terms.
- Set a split-test budget: run a small SEA campaign for your top five non-branded high-intent keywords while you build organic content, then compare cost per conversion over 90 days.
- Do not pause SEA until organic has held a top-three position for at least four consecutive weeks; otherwise you risk losing the visibility you paid to build.
Plain-English take
Think of search results like a library. SEO is getting your book placed on the shelf by making it relevant and well-organised — it takes time but stays there. SEA is paying the librarian to put your book on a display table at the front — it gets seen immediately, but the moment you stop paying, it is gone. Both get people to the book, but one is a one-time cost and the other is a daily fee.
The decision rule I use: if a keyword has a cost-per-click above £2 and I have no organic ranking in the top 20, I start with SEA to test conversion potential while I build the SEO. But if the CPC is below £0.50 and the monthly search volume is over 1,000, I put that budget into content creation instead, because the [cost for SEO](/cost-for-seo/) is lower in the long run once the page ranks.
For example, a client selling refurbished laptops used a keyword "thinkpad x1 refurbished" with a CPC of £3.20. We ran SEA for two months, confirmed a 4% conversion rate, then built a dedicated product page. Ten weeks later organic took over the top position and we cut the SEA budget by 80%. Without the paid test, we would have invested months of content effort on a keyword that might not convert. That is the [SEO and PPC handshake](/the-seo-and-ppc-handshake/): paid proves the market; organic captures the margin.
When it actually matters
Launching a new product: SEA gets you in front of buyers fast while SEO catches up. A SaaS client of mine launched a project management tool and needed 100 beta sign-ups in two weeks. SEA delivered 87 sign-ups at £4.20 each; organic brought 3. The campaign gave them the data to decide which features to highlight on the landing page, which then informed the [SEO SEM strategy](/seo-sem-strategy/) for the long tail.
Competing for high-volume keywords: a new site with zero authority cannot rank for "buy coffee beans online" in six months. They spent £1,200 per month on SEA, generated 150 conversions, and the revenue funded the SEO content that eventually ranked. Some argue you should always start with SEO to avoid waste, but I have seen cases where the business could not wait a year. The [SEO vs PPC](/seo-vs-ppc/) decision here is about cash flow and speed.
Seasonal campaigns: SEA is perfect for short bursts (holidays, events). I ran a Christmas campaign for a gift shop that spent £2,000 on SEA over four weeks and generated £14,000 in revenue. The organic page was still ranking the next March, but the volume had dropped by 90%. Edge case: hyper-local queries like "plumber in SE1" – local SEO often outpaces SEA because of map pack prominence (44% click-through for top three organic positions versus 7% for the top ad), but for emergency terms like "emergency plumber" SEA still wins because speed trumps cost.
What I got wrong
I used to think SEA was just 'SEO with money'. It is not. SEA is a separate channel with its own rules — bidding, quality score, ad rank. Treating them the same leads to wasted budget. I once optimised a landing page for both SEO and SEA with the same approach. My organic page ranked well for "cheap web hosting", but the SEA cost per conversion was £8 because the page had too many internal links and a cluttered layout. After I built a dedicated landing page matching the ad copy, the cost per conversion dropped to £2.50. That taught me that [SEO and PPC integration](/seo-and-ppc-integration/) requires separate landing page strategies.
I also assumed SEO was free. It is not — it costs time, tools, and expertise. I once spent 20 hours per week on outreach for a client when a £500 PPC campaign would have proven the keyword demand in one week. Now I check SEA data before committing serious organic resources. My rule: if a keyword has monthly search volume below 100 and a CPC above £5, I skip SEO entirely and use only SEA for a short test.
Another mistake: I expected SEO and SEA to work in isolation. They do not. Running both channels on the same site taught me that organic click-through rates influence ad quality scores indirectly, and that coordinated messaging boosts conversion rates. I now plan the [PPC and SEO working together](/ppc-and-seo-working-together/) from the start.
Next step
Quick answers
Can I run SEO and SEA for the same keyword?
Yes, but with caution. If you have both an organic listing and a paid ad, you may cannibalise clicks. However, if your organic listing is below the fold or you need to test ad copy, running both can increase total visibility. I recommend pausing the ad once organic reaches the top three positions for at least a month.
Is SEA a waste of money if I already rank number one organically?
Not necessarily. Some brands run SEA on their own brand terms to protect against competitor bidding or to control the message. But for non-brand terms, if you rank first organically, the incremental value of a paid ad is often low. I would run a two-week test with a 20% bid to see if the ad generates additional conversions beyond organic.
How do I decide between SEO and SEA on a limited budget?
Prioritise keywords by commercial intent and competition. Use SEA only for keywords with high purchase intent where your organic position is weak. For informational keywords, invest in SEO. A simple rule: if the average CPC is less than £1 and your organic position is below 10, use SEA to test while building content. If CPC is over £3, consider SEO first unless you have a high conversion rate.
Sources
Primary documentation is linked directly. Anything commercial is marked nofollow.
- Google Search Central — Explains how organic search works, ranking systems, and SEO best practices.
- Google Ads Help — Authoritative source for paid search, auctions, bidding, and ad formats.
- SEO Starter Guide — Clear baseline definition of SEO and practical optimisation concepts.
Notes from Callum Bennett.