PPC vs SEO vs Paid Social: Where Should B2B Budget Go?

"Is PPC better than SEO?" is one of the most-asked budget questions in B2B marketing, and it is the wrong question. It assumes the two are substitutes. They are not — and the framing quietly ignores a third channel that has become the most important demand lever in B2B. The honest version is three-way: PPC captures demand that already exists, SEO compounds your authority over time, and paid social creates demand among the majority of your market who are not searching for anything yet.

None of the three is "better". They do different jobs, at different speeds, with different failure modes, and the right split depends almost entirely on where your business is — not on which channel has the most persuasive conference talks. This post covers what each channel is actually for, where allocations usually go wrong, and a worked example of how a £10,000-a-month B2B budget might be split. Plus the uncomfortable observation at the end: the biggest cost inside all three is the same line item, and most firms pay for it three times.

What Each Channel Is Actually Good At

Most comparisons treat PPC, SEO and paid social as interchangeable ways to buy pipeline. They are closer to three different jobs that happen to share a budget line. Three directional signals frame the whole argument — treat them as market-typical shapes, not lab measurements.

PPC: intent capture

Paid search intercepts people who are already looking for what you sell. Someone types the query, you appear, they click. The intent is declared, the buying window is open, and a click can become pipeline within days. That immediacy is genuinely valuable: no other channel gives you a same-week read on whether your offer and message convert.

The limits are structural. You are renting attention in an auction, so competitive UK B2B categories routinely price clicks anywhere from £5 to £30 or more — a typical market range; your category will have its own weather. Costs rise with competition rather than fall with scale, and the day you stop paying is the day the traffic stops. Above all, you cannot buy more demand than exists. Once you have covered the searches your buyers actually make, extra budget buys worse clicks, not more pipeline.

SEO: compounding authority

SEO is the only channel of the three where the asset appreciates. A page that ranks for a commercial query keeps producing visits with no media bill attached, and every credible page makes the next one slightly easier to rank. Over two or three years, a well-built content engine becomes the cheapest pipeline source a B2B firm owns.

The catch is the tense. SEO charges you in the present and pays you in the future: content production, technical work, and typically six to twelve months before a newer domain sees meaningful movement. It is also getting harder at the top of the funnel, where AI summaries increasingly answer informational queries before anyone clicks. The compounding still works — but it now rewards demonstrable expertise and commercial-intent pages, not volume publishing.

Paid social: demand creation

Here is the fact the PPC-versus-SEO framing misses entirely: the overwhelming majority of your market is not searching. The rule of thumb popularised by the Ehrenberg-Bass Institute and LinkedIn's B2B Institute is that around 95% of B2B buyers are out of market at any given moment. Search — paid or organic — can only ever reach the sliver who are in it.

Search can only harvest demand. Someone has to plant it.

Paid social is how you reach the rest. LinkedIn and Meta let you put creative in front of precisely defined audiences — job titles, industries, company sizes — years before they type anything into Google. Done well, it creates the demand the other two channels later harvest: the branded searches, the "we've been following you for ages" first calls. Done badly, it is a lead-gen form shoved at a cold audience and a fast write-off. The difference is almost entirely creative quality, which is why a serious paid social agency obsesses over the ads themselves — and why native video creative, the kind a video advertising agency builds for the feed rather than the boardroom, consistently outperforms repurposed brochureware.

The Three Channels Side by Side

The Honest Answer: Sequence by Stage

So where should the budget go? The truthful answer is "it depends on stage", and the useful version of that answer is a sequence.

1. Validate with paid search. If you are early — new proposition, unproven messaging — paid search is the fastest honest feedback money can buy. A few thousand pounds against high-intent keywords will tell you within weeks whether people who already want this thing choose you when offered it. Do not build a content engine on an unvalidated message.
2. Compound with SEO and content. Once you know which messages convert, turn them into assets you own. The keywords that produced pipeline in paid search are your SEO target list: you already know they convert, so ranking for them organically is buying the same traffic once instead of every month.
3. Amplify with paid social. With capture working and content compounding, paid social advertising is how you grow the market you can capture from. It fills the top of the funnel that search can only drain.

In practice, established firms run all three simultaneously, and the sequencing shows up as weighting rather than order. The mistake is not running one channel at the wrong time; it is holding the weighting your business needed two stages ago.

Common Allocation Mistakes

• All capture, no creation. The default B2B allocation is 100% bottom-of-funnel: paid search, retargeting, a neglected blog. It works until it doesn't — you harvest the existing demand, CPCs creep up as competitors bid on the same shrinking pool, and growth flatlines because nobody planted anything. If cost per lead has risen for three consecutive quarters on flat budget, this is usually why.
• Funding SEO without funding content. An SEO line that covers audits, tooling and a retainer but no actual content production is a rounding error with a dashboard. Audits do not rank. Pages rank.
• Judging demand creation on capture metrics. Running LinkedIn ads at cold audiences and killing them in week three because demo requests did not spike is measuring a channel against a job it was never doing. Demand creation pays out over quarters — in branded search, in inbound quality, in shorter sales conversations that start warm.
• Spreading budget so thin nothing works. £2,000 a month split three ways is roughly nothing, everywhere. Below a working threshold, concentrate: one channel run properly beats three run homeopathically.
• Setting the split once and never revisiting. The right allocation at validation stage is close to the wrong one two years later. Rebalance twice a year, using the sequence above as the map.

A Worked Example: £10k a Month

Numbers make this concrete. Here is an illustrative allocation for an established B2B firm — sales-led, deal sizes north of £20k, some existing branded search, roughly £10,000 a month to deploy. It is a starting point for an argument, not a prescription.

The logic behind each line:

• £2,500 paid search — full coverage of branded terms plus the non-brand keywords that have already proven they convert. Capture the demand that exists; resist the urge to chase volume beyond it.
• £3,000 paid social media — sustained presence in front of a named target segment on LinkedIn and Meta. Enough to be remembered; not yet enough to be everywhere.
• £3,500 content production — deliberately the largest line, for reasons the next section makes plain. This is the raw material every other line depends on.
• £1,000 SEO technical and measurement — keeping the site rankable and the attribution honest enough to rebalance with a straight face.

Shift the weights by stage: pre-validation, flip most of the paid social line into search until the message is proven. Post-scale, it flips the other way — capture saturates, and creation becomes the only place growth can come from.

Make the Content Once, Spend It Three Times

That content line is where most budgets quietly fall apart, because most firms fund content three separate times: blog writers for SEO, a creative agency for the ads, a production company for the brand film nobody distributes. Same subject matter, three invoices, zero compounding.

The alternative is a content system. Film one substantial piece — an expert conversation, a customer story, a properly argued point of view — and it feeds all three channels:

• SEO gets articles with actual expertise in them: transcripts, arguments and specifics a copywriter alone could not produce, which is precisely what ranking now rewards.
• Paid social gets months of native video clips — the creative that decides whether the channel works at all.
• PPC gets stronger landing pages: the same video assets lift conversion on the pages your expensive clicks land on, which is the quiet way to cut effective cost per lead.

This is the model we run: corporate video production built for distribution rather than the office lobby screen, cut into channel-native assets, pushed through paid media we manage ourselves. Our case studies show what happens when the creative and the distribution are made by the same team, on purpose.

If your budget conversation is still "PPC or SEO?", the most valuable move is to widen it. We help B2B teams build the creative and run the distribution as one system — and we are happy to start with an honest look at where your next pound works hardest. Talk to our paid social agency team, and we will tell you in plain numbers what we would do with your £10k.