Fractional CFO for B2B SaaS ($1–25M ARR)

An embedded, SaaS-native fractional CFO and head of finance for early-stage B2B SaaS companies that have outgrown founder-led finance but don't yet need — or want to pay for — a full-time CFO. Not detached, once-a-month advisory: a hands-on finance leader who works inside your team, your tools, and your numbers.

Who it's for

B2B SaaS companies between roughly $1M and $25M ARR where finance is still run by the founder or a bookkeeper, a board meeting or a raise is coming, and decisions increasingly hinge on the numbers — but a full-time CFO would be overkill.

What your fractional CFO owns

• Board & investor reporting — the package and the narrative behind it
• Fundraising & diligence — the model, the data room, and the metrics
• Financial model, forecast, cash and runway planning
• SaaS metrics done right — ARR, GRR/NRR, Rule of 40, CAC payback, burn multiple
• Finance systems, process, and building the eventual full-time team

Why SaaS-native matters

A generalist CFO learns your business on your dime. A SaaS-native fractional CFO already knows that net revenue retention drives your growth math, that headcount × quota overstates real capacity, and what your board actually cares about. It's the same finance thinking behind ARRGuide and our library on SaaS metrics, retention, and planning — applied inside your company.

Also searched as: outsourced CFO for SaaS, part-time CFO for SaaS, fractional head of finance, early-stage SaaS CFO.