Fractional CMO vs. agency. How to actually choose.

Not 'it depends.' A real decision framework.

I get this question every week. 'Should we hire a fractional CMO or an agency?' The honest answer requires understanding four dimensions: ownership, speed, cost, and accountability.

Dimension 1: Ownership

Agency: Executes campaigns you define. They need a brief. They deliver assets. They don't own the strategy or the results — you do.

Fractional CMO: Owns the strategy, the team, and the outcomes. Sets the direction, manages the execution (often through agencies or contractors), and reports to the CEO/board.

Choose agency if: You have a clear strategy and need execution horsepower.
Choose fractional CMO if: You're not sure what the strategy should be, or your current one isn't working.

Dimension 2: Speed

Agency: Onboarding takes 2-4 weeks. First deliverables in 4-6 weeks. Meaningful results in 3-6 months.

Fractional CMO: Onboarding takes 1-2 weeks. First strategic changes in week 2-3. Meaningful results in 2-4 months — because they cut what's not working immediately.

Dimension 3: Cost

Agency: $5K-$25K/month for a mid-tier B2B agency. Often with 6-12 month contracts. Scope creep is expensive.

Fractional CMO: $5K-$15K/month for 2-3 days/week. Usually month-to-month or quarterly. You get a senior operator at a fraction of a full-time CMO salary ($200K-$350K+).

Dimension 4: Accountability

Agency: Accountable for deliverables (assets, campaigns, reports). Not accountable for pipeline or revenue. If leads don't convert, it's 'a sales problem.'

Fractional CMO: Accountable for revenue outcomes. Pipeline, conversion, CAC, LTV. If it's not working, they change the strategy — they don't just change the creative.

The decision framework