Do you need a fractional finance team or a full-time CFO?
When does a fractional strategic finance team make sense?
For a $3M to $30M B2B SaaS company, choose a fractional strategic finance team when forecasts, operating analysis, and board preparation need a recurring owner. Accurate books alone call for accounting support.
- Use a controller when you need reliable books but can own operating decisions yourself.
- Use periodic CFO input for a defined question, such as reviewing a model.
- Consider a full-time CFO when finance needs daily internal leadership, not just recurring work delivered by a fractional team.
When are accurate books no longer enough?
Accurate books are enough when you can make operating decisions without someone updating forecasts between closes. For companies with usage-based or hybrid billing, payment flows can complicate that choice. Usage volatility, seasonality, customer mix, and transaction timing can change cash plans and revenue unit economics before the next set of statements arrives.
- The first-hire guide puts books and a controller first, strategic finance when decisions recur, and CFO ownership when board responsibilities recur.
- Cash Management refreshes the cash forecast monthly and tracks runway. Strategic Finance adds a monthly-updated operating forecast and bi-weekly sessions.
- Choose strategic finance when recurring decisions about sales efficiency or unit economics need updated assumptions and a named owner to follow through.
When do you need an ongoing fractional finance team?
Use periodic CFO input to navigate a specific situation like a fundraise, stalling growth, or exit preparation. Choose an ongoing fractional team when forecast updates, operating analysis, or board preparation recur and need a named owner.
- A controller owns accounting and Stripe reconciliation. Strategic finance uses settlement timing to update cash forecasts and assess revenue unit economics and sales efficiency.
- These businesses often combine licenses with transaction-based billing. Usage swings, customer mix, and seasonality complicate revenue recognition and forecasts.
- Bridges’ scope sets a bi-weekly Strategic Finance cadence and a weekly Fractional CFO cadence that includes board preparation. Controller services are separate.
Should you use a fractional team or hire a full-time CFO?
Choose a fractional team when you need recurring finance work but not a CFO leading the function inside your company every day. Choose a full-time CFO when daily internal leadership and responsibility justify a dedicated hire.
The table compares an accountant or controller, periodic CFO input, a fractional strategic finance team, and a full-time CFO on the same seven dimensions. It shows who owns the books, model updates, and board preparation, along with the work behind operating decisions. It also compares cadence, access, and limits or handoffs. Your executives keep decision authority in every option. Finance owns the analysis, forecasts, and board work that its scope covers.
Who owns each part of finance?
Founders and executives own operating decisions under every option. Finance can own the analysis, forecasts, and board materials that inform those decisions. The fractional column follows Bridges’ published scope. Compare pricing separately because controller services have a separate fee.
| Responsibility | Accountant or controller | Periodic CFO input | Fractional strategic finance team | Full-time CFO |
|---|---|---|---|---|
| Books | Owns close and reconciliation | Relies on bookkeeper or controller | Controller can own books separately | Oversees internal or outside accounting |
| Model updates | Supplies actuals | Updates for a defined project | Owns recurring forecast updates | Directs ongoing updates |
| Operating decisions | Founder or executives decide | Founder or executives decide | Founder or executives decide | Founder or executives decide |
| Board prep | Supplies financials | Helps within project scope | Fractional CFO scope includes board preparation | Owns preparation |
| Cadence | Monthly close | Agreed project or sessions | Cash Management monthly, Strategic Finance biweekly, Fractional CFO weekly | Daily internal leadership |
| Access | Accounting contact | Scheduled access | Strategic Finance and Fractional CFO include async Slack | Internal access |
| Limits | No automatic forecast ownership | No automatic follow-through | Fractional CFO includes Strategic Finance, not controller services | Requires a full-time hire |
| Handoff | Transfers books and records | Transfers project work | Shared repository retains context | Takes over documented work |
Who should own finance work in each situation?
Match the owner to the work that needs to recur. Bridges’ service descriptions place Cash Management with seed-to-Series-A runway work, Strategic Finance with $3M-plus ARR and accrual books, and Fractional CFO with post-Series-A board accountability.
- Your existing accountant can keep the books. Controller services are separately priced.
- A defined model or data room project may need one-time support rather than an ongoing finance owner.
- Your executives retain operating decisions, even when finance owns the analysis and board preparation.
| Situation | Work needed | Owner |
|---|---|---|
| No finance team | Accurate books and cash visibility | Outside accountant or controller owns the books; founder owns cash decisions. Assign a finance lead to runway updates if they recur. |
| Bootstrapped growth | Recurring forecasts, sales efficiency, and revenue unit economics | Accountant or controller owns accrual books; a fractional finance lead owns forecast updates and analysis; founder decides. |
| Series A | Rolling forecasts and board reporting | Fractional CFO owns forecast and board preparation; accountant or controller owns the books; executives decide. |
| Upcoming fundraise or transaction | Fundraising model and data room, or deal-specific diligence | One-time data room project for a defined fundraise. Scope transaction work separately. |
When should you hire a full-time CFO?
Hire a full-time CFO when your finance work requires daily internal leadership, including managing finance staff and bringing analysis into operating decisions. Bridges’ engagement guidance says post-Series A board accountability has “no fixed ARR threshold for this responsibility.”
- In a payments business, customer mix and transaction timing can change the cash plan between reporting cycles.
- If forecast reviews and board preparation fit a scheduled cadence, a fractional CFO may still own that work without a permanent hire.
- Use the stage-by-stage hiring guide for staffing context, but base the full-time decision on the leadership load you need covered each day.
What should your company keep when finance moves in-house?
Your company should keep the working model, access to its financial systems, and the assumptions behind its forecasts when finance moves in-house. Bridges describes a shared repository for books, forecasts, and reporting that lets a new finance lead use existing work rather than rebuild it.
- Keep the model and its source data where your incoming finance lead can inspect and update them.
- Keep systems access under company control, even when an outside accountant or finance team does the work.
- Document why forecasts changed and name who owns the books, forecasts, reporting, and decisions after the handoff.
