Most agency owners discover ABM through a new business conversation. Someone mentions it in a podcast, a consultant recommends it, and suddenly the team is building a target account list and calling it a strategy. What they’re missing is that ABM isn’t one thing – it’s a methodology with two completely different jobs to do. Treat it as just one and you’ll undercook both.
This post covers what account-based marketing actually is, how it splits into two distinct use cases for agencies, where the lines draw between acquisition and retention, and how to sequence both when resources are tight.
What ABM Actually Is (and What It Isn't)
Account-based marketing is a targeting methodology, not a channel. That distinction matters because agencies routinely confuse the two. ABM means identifying specific accounts – by name, sector, size, or whatever criteria fits your commercial model – and concentrating your marketing resource on those accounts rather than broadcasting to a broad market. It’s the deliberate narrowing of focus. Instead of putting content out into the world and hoping the right people see it, you decide who the right people are first, and then build everything around reaching them.
What it is not: a LinkedIn campaign. What it is not: a newsletter. What it is not: a content strategy with a looser brief. I’ve seen agencies rebadge their existing marketing activity as ABM without changing a single thing about how it works. That’s not ABM – that’s just marketing with a new label on the tin. The methodology itself is simple. Build a target list. Understand each account. Design touchpoints – content, events, outreach, direct conversation – specifically for those accounts. Measure engagement at the account level, not the channel level. Repeat, refine, and close.
“ABM is a depth play, not a reach play. Thirty accounts worked consistently will outperform three hundred accounts touched once.”
New Business ABM: Manufacturing Warm Relationships
When most people talk about ABM, this is what they mean. You have a list of accounts you don’t have. You want to get on their radar before a brief exists. The goal here is to build familiarity and trust with decision-makers at target organisations, so that when they do have a need – or when you create one – you’re already a known quantity rather than a cold name in an inbox.
This works because B2B buying decisions, especially for agency services, are rarely triggered by advertising. They’re triggered by a combination of need, timing, and existing awareness. ABM at the new business end is about loading the awareness side of that equation in advance. In practice, for an agency targeting 20 to 30 named accounts, this might look like: following and engaging with their key people on LinkedIn, producing content that speaks directly to challenges in their sector, securing speaking slots or event presence where those people gather, and running warm outreach that references something specific to their world. Each touchpoint is deliberate. Each one is designed to close the familiarity gap without asking for anything yet. The size of the list matters. Thirty accounts, worked consistently over six to twelve months, will outperform three hundred accounts touched once. ABM is a depth play, not a reach play.
Existing Client ABM: The Neglected Growth Engine
This is the version most agencies don’t run – and it’s the more immediately valuable one. Your existing clients already know you. They’ve already formed an opinion of you. The question isn’t whether they’ve heard of you; it’s whether they know the full extent of what you do, whether they see you as a strategic partner rather than a supplier, and whether they’re moving closer to you or quietly looking elsewhere.
The evidence here is stark. Research from the What Clients Think 2026 report – based on 700 client interviews with UK creative agency clients – found that 82% of clients only have partial knowledge of their agency’s full offer. Nearly nine in ten last visited their agency’s website more than six months ago. And agencies that market their capabilities loudly to prospects are typically sharing none of that with the clients who would benefit from it most. This is where existing client ABM sits. You identify the accounts with expansion potential, the accounts showing signs of disengagement, and the accounts where the relationship has gone transactional. You then design a programme of deliberate, personalised activity – direct insight-sharing, senior relationship touchpoints, events, capability briefings – targeted specifically at those accounts. The commercial logic is obvious. Winning a new client costs more than growing an existing one. Protecting a £150k account from churn is worth the same as winning a new £150k account – but the effort required is a fraction of the cost. Most agencies have no systematic programme for either.
The Critical Difference in Messaging
The methodology is the same across both uses of ABM. The objective is different. The relationship context is different. And that means the messaging has to be completely different too. A cold prospect needs proof and credibility. They don’t know you, so you’re earning trust from scratch. The content and outreach needs to demonstrate capability, sector understanding, and the commercial outcomes you’ve delivered for others. Case studies matter. Specificity matters. The more you can show you understand their world – before they’ve told you anything about it – the faster you close the awareness gap.
An existing client has already formed a view of you. Sending them the same proof-of-credibility content you’d send a cold prospect is, at best, redundant. At worst, it signals you’re not paying attention. What existing clients respond to is relevance to where their business is going next – new thinking, forward-looking insight, evidence that you’re ahead of the curve. The Relationship Report 2025, drawing on over 1.5 million client-agency data points, found that innovation is the single highest-rated theme in client satisfaction, and that one in three senior clients now rate their agency lower for confidence to meet future needs than for satisfaction today. That confidence gap is what existing client ABM is designed to close.
The Bottom Line
For most independent agencies in the £400k to £2m revenue range, running two sophisticated parallel ABM programmes at the same time isn’t realistic. Start with existing client ABM. It’s cheaper to run, the ROI is faster, and the downside risk of not doing it – client churn – is more immediately damaging than a slower new business pipeline. Identify two or three clients where there’s clear expansion potential or early warning signs of disengagement. Build a simple, deliberate programme around them. Then build new business ABM alongside it. Pick a tight target list – twenty to thirty accounts maximum. Commit to consistent, multi-touch engagement over a minimum of six months. This is not a campaign with a start and end date. It’s an ongoing targeting programme that runs until the account converts or you make an active decision to drop them from the list. One final thing worth saying plainly: posting on LinkedIn is not ABM. With active client engagement on LinkedIn now at just 16% – down 7% in a single year – broadcasting to your network is reaching a shrinking, time-pressured audience. Real ABM is personalised. It’s account-specific. If the same message is going to five hundred people, it’s marketing. If it’s built for a named account and delivered with intent, it’s ABM. The distinction is everything.
Frequently Asked Questions
What is account-based marketing for agencies?
Account-based marketing for agencies is a targeting approach where you identify specific named accounts – prospects or existing clients – and concentrate your marketing activity on those accounts rather than broadcasting broadly. The goal is depth of engagement with fewer, higher-value targets rather than reach across a large audience.
Is ABM for new business or client retention?
Both. ABM works across two distinct use cases: new business ABM, where you target accounts you don’t yet have, and existing client ABM, where you deepen engagement with current clients to protect and grow revenue. Most agencies only think about the new business version, which means they’re leaving significant retention and growth opportunity on the table.
How many accounts should an agency target with ABM?
For most independent agencies, twenty to thirty target accounts is the right range for a new business ABM programme. Any more and you can’t sustain the depth of engagement the methodology requires. ABM is a long game – consistent activity over six to twelve months, not a short campaign burst.
How is ABM different from regular agency marketing?
Regular agency marketing broadcasts to a broad audience and waits for interested parties to respond. ABM inverts that. You identify the accounts first, then design personalised, account-specific touchpoints to reach them. If the same content or message is going to five hundred people, it’s marketing. If it’s built for a specific named account, it’s ABM.
