When should a Series B startup hire a full-time CMO?

Typically at $15M–$25M ARR, when the marketing team is 8+ people and requires full-time executive management, or when Series C is 12–18 months away and the investor narrative requires a named CMO.

How does a fractional CMO support Series C preparation?

By building and documenting the marketing metrics investors care about: CAC by channel, pipeline contribution, brand awareness scores, and competitive win rates. Also by building the growth narrative and category positioning.

Can a fractional CMO manage a Series B marketing team?

Yes, including team of 5–15 people. Fractional CMOs at this stage function as a true C-suite executive - attending leadership meetings, managing direct reports, and owning marketing OKRs.

Series B Scaling Expert

Fractional CMO for Series B Startups

Scale marketing operations, build your high-performance team, and prepare for Series C with experienced CMO leadership.

Schedule Series B Strategy Call

The Bottom Line

Series B is the scaling inflection point. You have a proven GTM motion, a growing sales team, and investor expectations for repeatable, predictable revenue growth. A fractional CMO for Series B startups either plugs a gap in senior marketing leadership or provides oversight as you build toward a world-class full-time CMO - ensuring you don't lose momentum at the most critical growth stage.

What a Fractional CMO Does in Fractional CMO for Series B Startups

Demand generation scaling: increasing pipeline volume without proportional CAC increase
Marketing team build-out: VPs, directors, and specialized contributors
ABM programs for enterprise segment expansion
Category and brand investment ahead of Series C
Marketing operations: tech stack, attribution, and revenue reporting

Marketing Challenges in This Vertical

Scaling pipeline without CAC inflation

Series B companies must grow pipeline significantly while keeping CAC healthy - requiring channel diversification and conversion rate optimization.

Building and managing a larger marketing team

As marketing scales from 2–3 to 8–15 people, management infrastructure and team architecture become critical challenges.

Entering enterprise segments

Series B often involves moving upmarket to enterprise. This requires different content, different channels, and different sales support than SMB or mid-market.

Preparing for Series C due diligence

Series C investors scrutinize marketing contribution to revenue, brand reputation, and competitive positioning - all of which must be built and documented.

Engagement Scope & Deliverables

Series B engagements run 12–24 months at 30–50 hours per month. Deliverables include a team architecture plan, enterprise marketing program, ABM playbook, and quarterly board-ready marketing reporting.

Cost & When to Hire

Fractional CMO retainers for Series B startups range from $12,000–$30,000/month. Full-time Series B CMOs command $280K–$500K+ in total comp including equity.

When to hire: Engage fractional at Series B close if you don't have senior marketing leadership in place, or to complement an existing VP of Marketing who needs C-suite strategic support.

What to Look For

Strong Series B/C startup experience - specifically someone who has scaled a marketing team from small to mid-size, managed budget allocations of $2M–$10M+ per year, and prepared companies for growth rounds.

Ready to Build a Marketing Machine?

Get a free revenue systems diagnostic and see exactly where your marketing gaps are - and what it would take to fix them.

Get Your Free Diagnostic