Fractional CFO Services

A senior finance leader for your small business — part-time, fixed fee.

Brimston's fractional CFO service gives small and mid-sized businesses strategic financial leadership without a full-time hire. Forecasting, cash flow, fundraising, and board-ready reporting — delivered by a CPA who knows your books.

What is a fractional CFO?

Strategic financial leadership without a full-time executive.

A fractional CFO serves your business part-time — typically a few days per month — and owns the questions a bookkeeper can't answer. Where should we spend the next dollar? Can we afford this hire? How much runway do we have? What does the lender need to see?

Brimston embeds a CPA-led CFO into your operating rhythm: monthly financial reviews, a rolling forecast you can trust, and a partner on speed-dial when the board asks the hard question.

Capabilities

What our fractional CFOs deliver.

Forecasting & Budgeting

Rolling 13-week cash forecasts, annual operating budgets, and scenario planning for the decisions that matter.

KPIs & Board Reporting

The five numbers your business actually runs on, packaged into a monthly board deck investors can trust.

Fundraising & Debt

Investor-ready models, data rooms, and lender packages — plus a seasoned voice in the room during diligence.

Operational Finance

Pricing, unit economics, margin analysis, and hiring plans grounded in the numbers, not the vibes.

When to hire

Six signals it's time.

Most SMBs bring in a fractional CFO between $1M and $30M in revenue — when a bookkeeper isn't enough, but a full-time CFO isn't justified yet.

  • Revenue between $1M and $30M
  • Raising capital or refinancing debt
  • Multi-entity or multi-state structure
  • Preparing for an acquisition or exit
  • Bookkeeper in place, but no financial strategy
  • Founder still owns the model in a spreadsheet

Begin

Ready for a CFO who knows your books?

Tell us about your business and receive a fixed-fee proposal within one business day.