Four websites. Four CMS licences. Four hosting contracts. Four sets of analytics. Four content calendars maintained by a team that was already stretched when you only had one.
You already know about the first set of costs. They're in the budget. What you probably haven't done - and I'd wager good money on this - is added up the second set. The invisible ones. The hours your marketing coordinator spends copy-pasting the same announcement into four different backends. The SEO authority you're haemorrhaging because Google sees four mediocre domains instead of one strong one. The meeting last quarter where three people spent twenty minutes debating which website a case study should sit on, before someone suggested putting it on all four "just to be safe."
That second set of costs is almost always larger than the first. And until you can see both together in the same spreadsheet, the consolidation business case will never stack up - because you're only presenting half the picture to a board that's comparing it against the full cost of consolidation.
I've written a companion piece on the operational side of post-acquisition consolidation - the people, the politics, the sequencing. This piece is different. This is about the money. Specifically, about making the financial case visible enough that the decision actually gets made.
Let's start with what's probably already in your budget, even if it's scattered across multiple line items.
If you're running four websites on separate platforms - which is remarkably common among firms that have grown through acquisition - you're likely paying somewhere between £20,000 and £80,000 a year in CMS licence fees alone. That range is wide because it depends on the platforms. A couple of WordPress sites with premium plugins, a Sitecore instance, and something bespoke? You're towards the top. Four WordPress setups with modest hosting? Closer to the bottom. But it's never zero, and it's never as cheap as people think when you add it all up.
Then there's hosting. Separate providers, separate renewal dates, separate support tiers. Each with its own account management overhead. I spoke to the head of digital at a mid-sized accountancy firm last year who discovered she was paying three different hosting providers for four sites, because one provider happened to host two of them. She'd never seen all the invoices in one place before. When I showed her the total, she went very quiet for a moment, then said something I probably shouldn't repeat here. Nobody had ever put it in front of her like that.
Maintenance agreements come next. Security patching, plugin updates, platform upgrades - each site needs them, and they don't coordinate themselves. Either you're managing multiple agency relationships, or your internal team is spending a disproportionate chunk of its week keeping the lights on across four separate environments. Neither is a good use of anyone's time.
And then there's the tooling. Google Search Console properties, Hotjar or similar heat-mapping subscriptions, SEO platforms like Semrush or Ahrefs, A/B testing tools. Some of these are priced per domain. Others are priced per seat but require separate configurations per property. None of it is dramatic individually. All of it compounds.
These are the costs that typically appear in the consolidation business case. And they're real. But when you present them to a CFO alongside the cost of actually doing the consolidation, the saving often looks... modest. Not obviously worth the disruption. Which is why the proposal gets deferred. Again.
The separate sites are working. The consolidation cost is high. It's not worth the disruption.
I hear this constantly. And I understand it - genuinely. Nobody wants to spend six figures fixing something that isn't visibly broken. But "working" and "efficient" aren't the same thing. The gap between those two words is where the real money lives.
Once you see these, you can't unsee them.
Duplicated content effort. Your marketing or comms team is maintaining content across four websites. Four different editorial workflows, four different content structures, four different sets of stakeholder expectations about what gets published and when. Every company announcement, every leadership change, every new service page - someone is making a decision about where it goes, then doing the work multiple times. Or worse, doing it once and forgetting the other three.
I worked with a professional services firm that had grown to five sites through acquisition. When we tracked the time their three-person marketing team spent on cross-site content management, it came out at roughly 14 hours a week. Fourteen hours. That's almost a full-time equivalent, spent not on strategy or creation, but on duplication and coordination. At a blended cost of, say, £45 per hour, that's over £30,000 a year in labour - just for the copying, pasting, checking, and re-checking. The marketing director's reaction when I showed her the number was something along the lines of "well, that's depressing." She wasn't wrong.
Inconsistent branding and messaging. Four websites that started as four separate brands will diverge over time. It's inevitable. Different designers make different choices. Different teams interpret the brand guidelines differently - assuming brand guidelines even exist across all properties. Tone drifts. Visual language fragments. And the prospect who encounters two of your sites in the same week gets a confused first impression that no amount of clever copywriting can fix.
The commercial cost of this is genuinely hard to quantify. But if 15% of your marketing spend is less effective because your brand is diluted across four inconsistent properties, and your annual marketing budget is £200,000, that's £30,000 of reduced impact. It's a rough number - I wouldn't put it in a board paper with that precision - but the direction is right, and the magnitude is probably conservative.
Fragmented analytics. This one drives me slightly mad, because it's so preventable. Four separate Google Analytics properties. Four separate Search Console accounts. No unified view of how your total digital presence is performing. Every time someone asks "how's the website doing?" the answer requires someone to manually pull data from four dashboards and reconcile it in a spreadsheet.
Beyond the time cost, there's a decision quality cost. You can't see the full picture. You can't compare performance across properties meaningfully. You can't identify where traffic cannibalisation is happening between your own domains. You're making investment decisions based on partial data, which means you're sometimes making the wrong ones. And nobody knows, because the data to prove it doesn't exist in one place.
SEO dilution. This is the big one, and the one that most operations leaders underestimate because it requires a bit of technical context.
Domain authority compounds over time. Every backlink, every piece of quality content, every positive user signal builds the authority of the domain it sits on. When you have four domains, that authority is split four ways. You're competing against yourself for the same keywords, and none of your domains is accumulating authority as fast as a single consolidated domain would.
We worked with a top-20 accountancy firm that had four websites after a series of mergers. When we consolidated them - carefully, with a proper redirect strategy - organic traffic increased by 52% within four months. Not because we created better content. Because we stopped diluting the authority across four separate domains.
Internal confusion about what goes where. This sounds trivial. It isn't. The question "which site does this belong on?" gets asked dozens of times a month by anyone who creates content, reviews content, or references your digital presence in any other communication. Every time that question is asked, someone loses ten minutes. Every time it's answered incorrectly, someone loses an hour fixing it. It never appears in any report. It never makes it into the business case. But it's real, and it adds up.
If you're going to build a consolidation case that survives contact with a finance director, you need to move beyond "it's probably costing us more than we think" and into "here's the number, here's how we got there."
I know this next bit sounds like homework. But it's genuinely half a day's work, and the number at the end of it is usually the thing that finally moves the conversation.
Start with the direct platform costs - licences, hosting, maintenance contracts. You probably know most of these already or can find them quickly. That's your baseline, and it's the number that's been losing the argument with the board.
Then track the internal labour costs. How many hours per week is your team spending on content management, analytics, cross-site coordination, and governance across all properties? Multiply by an appropriate hourly rate. If you're not sure, ask the team to log their time for two weeks. The number will be higher than you expect. It always is.
After that, estimate the marketing waste - the proportion of your marketing spend that's less effective because of brand inconsistency and audience fragmentation. Use a range. Even a conservative 10-15% of total marketing spend is usually a significant number, and a range is more honest than false precision.
Then there's the analytics overhead - the hours spent per week on manual data reconciliation that a consolidated property would eliminate. And the SEO cost - the lost organic traffic attributable to fragmented domain authority. Your SEO platform can model this using your current traffic data and keyword rankings. If you're ranking positions 4-8 for terms where a consolidated domain would likely rank 1-3, the traffic difference is calculable.
Finally, and this is the one people skip: risk cost. Four CMS platforms means four attack surfaces, four sets of security patches to manage, four potential points of failure. IBM's most recent UK figure puts the average cost of a data breach at £3.4 million. Even a small increase in probability translates to meaningful expected cost. Probability-weight it honestly and put it in the model.
When organisations work through all of this honestly, the total is typically two to four times larger than the visible costs alone. That's the number that changes the conversation.
I want to be clear about something: consolidation isn't always the right answer. I know that's an unusual thing for a consultant to say, but it's true.
Consolidate fully when the acquired brands serve substantially overlapping audiences, when the market would be better served by one strong presence than four weak ones, and when your team's capacity to maintain multiple properties is genuinely hurting their ability to do higher-value work. This is the right answer more often than most people think.
Keep them separate when the brands serve genuinely distinct audiences in distinct markets with distinct propositions. If you've acquired a specialist employment law firm and a specialist IP firm, and their clients have nothing in common, forcing them onto a single site might dilute both brands rather than strengthening either. That's a real risk, and anyone who tells you otherwise is oversimplifying.
The middle option - migrating to a shared platform while keeping the brands visually distinct - is often the most pragmatic first step. You get the operational savings: single CMS licence, unified analytics, shared content infrastructure, one security patching regime. Without the commercial risk of merging brands prematurely. It's not as clean as full consolidation, but it's often the decision that actually gets made, which makes it more valuable than the perfect answer that sits in a drawer.
One more thing, because I've seen this go wrong enough times to feel strongly about it.
The consolidation that tries to migrate everything simultaneously - all four sites, all at once, big bang, over a weekend - is the consolidation that loses 20-30% of organic traffic and makes the whole project look like a mistake. The board remembers that. And the next time someone proposes a consolidation, the answer is no.
The phased approach works. Start with the lowest-traffic, lowest-risk property. Migrate it properly. Get your redirect strategy right. Measure the impact. Learn from it. Then apply that methodology to the next site.
We did exactly this for a UK IT services provider that had accumulated 13 websites through acquisition. Thirteen. We migrated them one at a time, each within a two-week window, with a comprehensive 301 redirect strategy for every URL. The first migration was the most nerve-wracking - the client's SEO lead was refreshing Search Console every hour for three days. But the traffic held. Then it grew. By the end of the project, 13 sites had become one with no measurable loss of organic traffic, and visibility had increased by 60%. The platform was also designed so that when the next acquisition happened, there was a repeatable process ready to go. Which there was, about eight months later.
SEO preservation isn't a nice-to-have in a consolidation project. If you lose your organic traffic, you haven't consolidated your digital estate - you've damaged it. Don't let anyone tell you it can be done cheaply, and don't let anyone skip the redirect strategy to save time.
The reason multi-site consolidation proposals get deferred isn't usually because the numbers don't work. It's because the numbers being presented are incomplete. You're showing the board the visible platform costs - £20,000 to £80,000 in savings - against a consolidation investment of £80,000 to £200,000, and the payback period looks long. Of course it gets deferred.
But when you include the duplicated effort, the analytics fragmentation, the SEO dilution, the marketing waste, the internal confusion, and the risk exposure, the true cost of the current state is typically two to four times higher. Suddenly the consolidation pays for itself in months, not years - before you even account for the improved experience your clients and prospects will get from a single, well-maintained, properly invested-in digital presence.
If you want to work through the numbers properly, book a digital estate cost analysis with us. We'll go through all of it with you, honestly, including the scenarios where consolidation isn't the right answer. Because sometimes it isn't. But you should know the real number before you decide.