Marketing Department as a Service: What It Means, What It Costs, and Who It Works For

Most B2B companies between £2M and £30M in revenue face the same structural problem: they need a complete marketing function, but building one in-house costs more than the business can justify at that stage. Marketing department as a service, sometimes shortened to MDaaS, is the operating model built to solve that gap. It gives growing companies access to strategy, execution, and reporting as a single, always-on function, delivered by an external team that operates as though it sits inside the business.

The model borrows its logic from SaaS and XaaS frameworks that technology buyers already understand. Where software as a service replaced on-premise installations with subscription access, MDaaS replaces the fixed cost of an internal department with a managed, scalable marketing function. The difference from traditional agency support is significant: this is not project work or campaign delivery on retainer. It is a complete department, embedded in the business, accountable for outcomes.

Why the Marketing Department as a Service Model Is Growing

The shift towards outsourced marketing functions is accelerating, driven by cost pressure and a shrinking talent pool.

Research from the Chartered Institute of Marketing found that 68% of UK businesses have either adopted or considered fractional and outsourced services across core functions. The Deloitte CMO Survey shows that full-time marketing hires now account for 77.9% of marketing staff, down from 82.5% in 2019, signalling a structural move towards blended and outsourced models. On the supply side, the full-service digital marketing agencies market is projected to grow at a 14.33% CAGR, reaching US$60.23 billion by 2033, according to Business Research Insights.

These numbers reflect a practical reality. Hiring a head of marketing, a content specialist, a digital marketer, a designer, and a PR lead costs between £320,000 and £380,000 per year in salary, benefits, and overheads, based on estimates from Miles Marketing. For a company turning over £5M, that is an enormous fixed commitment before a single campaign runs. Deloitte research indicates that companies outsourcing core functions save between 30% and 60% on operational costs, which explains why the MDaaS model is gaining traction with finance directors and CEOs alike.

What a Marketing as a Service Function Actually Includes

The defining feature of MDaaS is completeness. An ad-hoc agency relationship might cover SEO, or content, or paid media. An outsourced marketing department covers everything a CMO would build internally. Here is what that looks like in practice.

Strategic Leadership

Every marketing function needs a senior leader setting direction. In an MDaaS model, this role is filled by a fractional or embedded marketing director who owns the strategy, aligns activity to commercial goals, and reports into the leadership team. This is the layer most agency relationships lack entirely. Without it, tactical work drifts, channels operate in silos, and nobody connects marketing activity to pipeline.

Content and SEO

Content production, keyword strategy, and organic visibility sit at the centre of most B2B marketing programmes. An MDaaS provider runs these as an integrated workstream, not as isolated deliverables. That means editorial planning, production, distribution, and performance tracking all happen within one team.

Digital Marketing and Paid Channels

Paid search, paid social, remarketing, and conversion rate optimisation need consistent management and budget oversight. Within an MDaaS model, these channels are managed alongside organic activity, with shared reporting and unified attribution. This prevents the common problem of paid and organic teams working against each other.

PR and Communications

For companies in regulated sectors or those raising investment, earned media and stakeholder communications are not optional. An outsourced marketing team operating as MDaaS integrates PR into the broader marketing plan rather than running it as a separate workstream with its own agency.

Marketing Operations and Automation

CRM management, email automation, lead scoring, and reporting infrastructure are the connective tissue of a modern marketing function. An embedded marketing team handles these alongside campaign delivery, ensuring that data flows properly and that the commercial team can see what marketing is producing.

How MDaaS Differs from Traditional Agency Support

The distinction matters. Traditional agency relationships are typically scoped around deliverables: a number of blog posts, a set of social posts, a quarterly campaign. The agency works to a brief, delivers the output, and moves on.

MDaaS operates differently. The team is embedded in the client's business. They attend leadership meetings, have access to CRM and pipeline data, and are accountable for commercial outcomes rather than creative outputs. The relationship is closer to hiring a department than hiring a supplier.

This is the model that Forge Together runs in practice. The team operates as an extension of the client's business, with a fractional marketing director leading strategy and a production team handling execution across every channel. It is not a menu of services selected from a rate card. It is a functioning marketing department, delivered as a managed service.

What It Costs and Who It Works For

The economics are straightforward. Building an in-house team costs between £320,000 and £380,000 annually, according to Miles Marketing. An outsourced marketing department operating as MDaaS typically costs between £60,000 and £96,000 per year, depending on scope and seniority. That saving of 70% or more on direct costs is the primary commercial driver, but the speed advantage matters too. An MDaaS provider can be operational within weeks, not the three to six months it takes to recruit and onboard an internal team.

The model works best for companies in a specific stage. Pre-revenue startups rarely need a full function. Enterprises above £50M typically have the scale to build internally. The sweet spot is the £2M to £30M revenue range, where the business has enough commercial activity to need proper marketing but cannot yet justify the overhead of a full department.

B2B SaaS, healthtech, fintech, and professional services firms are particularly well suited. These sectors require a blend of technical content, digital performance, and relationship-driven communications that few single hires can cover.

What to Look for in an MDaaS Provider

Choosing the right partner requires more scrutiny than a standard agency selection process, because the relationship is deeper and the dependency is greater.

Strategic depth: The provider should offer senior marketing leadership, not just execution. If there is no strategic layer, you are buying an outsourced production team, not a department.

Sector understanding: B2B marketing in regulated or technical sectors requires domain knowledge. Ask for examples of work in your sector or adjacent ones.

Reporting and accountability: An MDaaS provider should report on commercial metrics, including pipeline contribution and revenue influence, not just vanity metrics like impressions and clicks.

Integration capability: The team should work inside your systems, attend your meetings, and communicate directly with your sales team. If they operate at arm's length, the model breaks down.

Scalability: Your marketing needs will change as the business grows. The provider should be able to scale activity up or down without renegotiating the entire relationship.

The Bottom Line

Marketing department as a service gives B2B companies a way to operate with a complete marketing function at a fraction of the cost of building one internally. For businesses in the £2M to £30M range, it removes the hiring risk, compresses the time to impact, and provides senior strategic capability from day one.

If you want to explore how an embedded marketing function could work for your business, book a consultation with the Forge Together team.