Start with the work, not the employment model
The useful question in an in-house vs agency marketing decision is not which option is universally cheaper. It is which arrangement can deliver your required work reliably, at an acceptable total cost, with risks you can manage.
Define the workload before comparing suppliers with employees. Separate ongoing responsibilities—campaign management, reporting and content production—from occasional needs such as research, a website rebuild or a brand launch. Then identify what requires constant access to your customers, product team or internal systems.
An agency proposal and a job description are not equivalent units of capacity. A proposal may cover several disciplines but reserve limited specialist time. An employee may offer sustained availability without covering every discipline. Compare deliverables, decision-making responsibilities and actual capacity rather than job titles.
Compare fully loaded costs on the same basis
What an internal team costs
Build the internal budget from compensation outward. The Bureau of Labor Statistics Employer Costs for Employee Compensation framework distinguishes wages and salaries from benefit categories including insurance, retirement, paid leave and legally required benefits. That is a useful reminder that a salary figure is not the complete employment cost.
Your worksheet should include:
- Salary, variable compensation and employer payroll obligations.
- Benefits, recruiting, onboarding and professional development.
- Equipment, software, data subscriptions and relevant overhead.
- Management, creative review and coordination time.
- Contractors or temporary coverage needed to fill capability gaps.
Avoid double counting. For example, do not automatically add paid leave to an annual salary that already pays the employee during leave. Instead, reflect unavailable delivery time when assessing capacity and any additional cover you actually need.
Public salary benchmarks—not agency equivalents
Historical US wage data provides a reference point, not a hiring quote or an international benchmark. For May 2024, the BLS reported these median annual wages:
- **Marketing managers: $161,030**, according to the BLS advertising, promotions and marketing managers profile.
- **Advertising and promotions managers: $126,960**, according to the same BLS occupational profile.
- **Market research analysts: $76,950**, according to the BLS market research analysts profile.
These are different occupations, not interchangeable staffing options. They are wage benchmarks rather than fully loaded budgets, and they do not establish what a particular candidate will accept.
A comparable agency retainer is **not published** in those BLS occupational profiles; the source covers employee wages, not agency quotations. Obtain a written proposal against your own scope instead of applying a generic salary-to-retainer conversion.
What an agency engagement costs
Start with the quoted fee, then identify what sits outside it:
- Discovery, onboarding and implementation work.
- Media spend, production, research and third-party licenses.
- Additional revisions, rush work and out-of-scope requests.
- Internal briefing, approvals and stakeholder coordination.
- Transition support, asset migration and replacement-provider onboarding.
Our guide to agency pricing models helps distinguish how different fee structures allocate scope and commercial risk.
Use the same planning period and output requirements for both options. Separate cash expenditure from allocated overhead and opportunity cost. An existing software license may create no additional cash expense; a busy executive's approval time can still constrain delivery.
Speed: distinguish starting quickly from shipping quickly
An agency can be the better route when its proposed team is available and already equipped for the work. However, a signed contract does not remove discovery, account access, tracking validation or approval dependencies. Confirm the actual start date and named delivery team rather than relying on general claims about speed.
An internal hire faces recruitment and onboarding before reaching useful capacity. Once embedded, that person may be better placed to resolve product questions and make frequent operational decisions without an external briefing cycle.
Ask both options to explain:
- What must be ready before delivery begins?
- Who can approve work and resolve competing priorities?
- What will be delivered first, and what could block it?
- How will urgent requests affect committed work?
A concrete brief exposes dependencies before they become delays. The questions in how to brief a paid media agency are useful for establishing objectives, access requirements and approval responsibilities.
Specialist depth: buy access, then verify availability
Internal teams offer continuity and accumulated business knowledge. The constraint is the capability mix you can sustain: hiring a capable generalist does not automatically provide deep expertise in analytics implementation, technical SEO, creative production and conversion research.
An agency can assemble complementary specialists, but its service list is not proof that those people will work on your account. When reviewing digital marketing agencies, ask for the proposed delivery structure rather than accepting the firm's overall headcount as evidence of capacity.
Request clear answers about:
- Who performs the work and who reviews it.
- Whether specialists are employees, contractors or subcontractors.
- Which capabilities are included and which require another scope.
- How competing client demands affect availability.
- What happens when a named team member leaves.
Evaluate depth against the actual assignment. For search work, the diligence questions in how to choose an SEO agency help separate a relevant delivery approach from a broad service claim.
Use work samples and an explanation of the proposed method. Do not require unpaid production work as a substitute for evaluation.
Switching risk exists on both sides
Leaving an agency
The main operational risk is losing access, context or momentum during the handover. Make company-controlled accounts and documented processes part of the engagement from the outset.
Before signing, settle ownership and access for advertising accounts, analytics, domains, source files, research and reporting. Clarify which materials transfer, which third-party licenses remain restricted, and what transition support costs. Record notice requirements and handover responsibilities in the agreement; do not assume a final invoice includes migration assistance.
Replacing an employee
An internal team can also develop concentrated dependencies. A departing employee may hold undocumented campaign logic, vendor relationships and system knowledge. Recruitment, training and interim support can disrupt work even when the company owns every account.
Use shared documentation, appropriate backup access, cross-training and regular handover notes. Compare the real exit scenario on each side: what would stop, what could continue, and who would restore missing capacity?
Choose the model that matches your constraints
Use the following as decision criteria, not universal rules:
- **Favor in-house** when work is sustained, priorities change frequently and delivery depends on close internal collaboration.
- **Favor an agency** when you need a defined specialist capability, bounded project delivery or additional capacity that does not justify permanent roles.
- **Consider a hybrid** when an internal owner can set priorities and retain business knowledge while external specialists handle defined execution.
A hybrid still needs explicit accountability. Name who owns the budget, approves work, maintains measurement and decides whether the engagement is succeeding.
The strongest comparison is a shared scope, an honest cost worksheet and a practical continuity plan. Choose the arrangement that can deliver the required work—not the one with the lowest-looking headline price.