Overview

What do fractional CFO services include?

Fractional CFO services give a business senior finance leadership on a monthly retainer instead of a six-figure hire. The work is a rolling 13-week cash flow model, a budget with monthly variance review, board and investor reporting, unit economics and pricing analysis, and a standing monthly strategy call.

There's a stretch in every growing business where the founder is doing CFO work badly and the lead bookkeeper is doing CFO work outside their remit. Revenue is past the seven-figure mark but a full-time CFO hire (six figures plus equity) feels premature. The result is decisions made without the financial rigour they deserve: pricing without unit economics, hiring without runway analysis, fundraising without a defensible model.

CFO-as-a-Service was built for that exact stretch. You get a senior, ACCA-qualified finance partner who acts as your CFO: building the cash flow model, running the budgeting process, owning the investor relationship from the numbers side, and being available for the strategic decisions that justify the hire.

Unlike a fractional CFO who shows up four hours a month and forgets your context between sessions, our CFO engagement sits on top of a live management-accounts function that we run for you. The CFO knows your numbers because we close your books. There's no information gap, no week-long ramp-up before useful conversation.

The Managing Director leads the engagement personally. The monthly strategy call is an hour. The 13-week cash flow model is rebuilt weekly and reviewed monthly. Investor reporting is in their preferred format. Pricing analysis, cohort margins, unit economics, handled as part of the retainer, not as a separate quote.

The 13-week model is the centre of the engagement because it is the only forecast short enough to be checked against reality every week. It is built bottom-up from named receipts and payments, not from a revenue growth percentage: the eleven customers who owe you money and when each historically pays, payroll dates, VAT and Corporation Tax due dates, rent, the software renewals nobody remembers. Actuals are dropped in each Monday and the variance is explained. Two months of that and the model stops being a spreadsheet and starts being a decision tool. The method is written up in our 13-week cash flow template.

Statutory dates are part of the cash plan, not a separate compliance chore. UK Corporation Tax is payable 9 months and 1 day after the year end while the return itself is not due for 12, so a company that plans around the return date is three months late on the cash. Statutory accounts are due at Companies House 9 months after the accounting reference date. Those dates go into the model on day one.

A worked example of the runway arithmetic we run at every monthly call. A business holding $420,000 of cash, burning $70,000 a month net, has six months of runway. Hiring two engineers at $9,000 a month fully loaded takes burn to $88,000 and runway to 4.8 months, which is under the six-month floor most investors want to see at the start of a raise. The answer is rarely no; it is usually later, smaller, or funded by moving a price. That is the conversation a fractional CFO is for.

Typical signals that the engagement is due:

  • Revenue past roughly $1m and a founder still building the board pack personally.
  • A raise, a bank facility or a first acquisition inside the next nine months.
  • Gross margin known at company level but not by product, channel or cohort.
  • Cash surprises: a month where the balance was not what anyone expected.
  • An investor asking for reporting in a format nobody owns.

The engagement sits on top of a live close, so it works best where we also produce monthly management accounts. Most of the businesses we take on this way are VC-backed startups and SaaS companies, where the reporting question is really a revenue recognition question. If you are still deciding whether the timing is right, start with how to know when you need a CFO, then see fixed-fee CFO pricing plans. Where a raise or exit is close, the due-diligence preparation work runs alongside. If you are comparing delivery models rather than providers, our virtual CFO vs fractional CFO comparison sets out how the two differ on pricing, continuity and scope, and which one suits a recurring need rather than a transaction. CFO work sits at the top of a stack that starts with clean bookkeeping, and that whole stack is set out in our directory of accounting, tax and advisory services.

What you get

What CFO-as-a-Service includes.

Bundled on top of full-service accounting. Sized to growth-stage SMEs and scaleups.

  • 13-week rolling cash flow model Built in week one, refreshed weekly, reviewed in your monthly call. Scenario-tested for hiring, capex and fundraising decisions.
  • Annual budget & quarterly reforecast Bottom-up build with department heads. Reviewed and reforecast every quarter against actuals. Tracked against the management-accounts variance pack.
  • Investor & lender reporting Board packs in your investor's format. Covenant tracking for debt facilities. Fundraising data rooms built and maintained.
  • Unit economics & pricing analysis What's actually profitable. Customer-level margins, cohort analysis, gross-margin decomposition. Pricing recommendations grounded in data.
  • KPI panel design & monitoring The metrics your business actually runs on, surfaced live via Fathom or Spotlight. Targets agreed quarterly, tracked weekly.
  • Fundraising support Financial model preparation, due-diligence response, term-sheet review (alongside your legal team), data-room maintenance through the process.
  • M&A & transaction support Buy-side or sell-side. Quality of earnings preparation, working-capital adjustments, transaction model build, post-deal integration finance.
  • Monthly strategy call (60 min) With the Managing Director. Walkthrough of the prior month, focus for the next, and the strategic decisions on your plate that the numbers can inform.
Which seat you need

Bookkeeper, management accountant or CFO?

The four roles overlap in title and not in output. Most businesses need the first two working properly long before the third is worth paying for.

Bookkeeper, management accountant or CFO?
The question being askedBookkeeperManagement accountantFractional CFOFull-time CFO
Was every transaction recorded and reconciled?Owns itReviews itNot in scopeNot in scope
Is the monthly pack right, and out by day five?Feeds itOwns itReads itReads it
Can we afford two engineers in March?Not in scopeNot in scopeOwns itOwns it
What price should this product carry?Not in scopeSupplies the margin dataOwns itOwns it
Who answers the lead investor's questions about the model?Not in scopeNot in scopeOwns itOwns it
How is it paid for?Included in a monthly retainerIncluded in a monthly retainerMonthly retainerSix figure salary plus equity
How we deliver

How a typical engagement runs.

A first-month onboarding that ramps fast, then a monthly cadence that sustains.

STEP 01

Diagnostic (week 1)

Deep-dive into the existing finance function. Books reviewed. Models inspected. KPIs assessed. Gaps documented.

STEP 02

Foundation build (weeks 2–4)

13-week cash flow built. Budget structure established. KPI panel designed. Reporting cadence agreed.

STEP 03

Monthly rhythm

Books close by the 5th. Strategy call by the 10th. Forecast refresh by the 15th. Investor pack (if applicable) by the 20th.

STEP 04

Quarterly review

Reforecast. Budget vs. actuals reviewed. Strategic priorities refreshed with the leadership team.

STEP 05

Ad-hoc support

Major decisions (hiring, capex, fundraising, M&A) trigger a working session within 48 hours. No extra invoices.

STEP 06

Quarterly board pack

Where applicable, prepared and delivered in advance of the board meeting. We can attend live or async.

Best for

Who this is for.

IDEAL

Growth-stage businesses ($1M–$30M ARR)

Past product-market fit. Scaling. Need strategic finance but a full-time CFO is six months early. This is exactly the gap we fill.

IDEAL

VC- or PE-backed companies

Investors expect quarterly board reporting, monthly KPI updates, and a defensible model when you fundraise next. We make that easy.

IDEAL

Cross-border businesses

Multiple entities, multiple currencies, multiple jurisdictions. Consolidation, FX management and transfer pricing are part of routine work.

GOOD FIT

Pre-IPO or pre-acquisition

You're 12–24 months from a transaction. Quality of earnings, audit-trail readiness and clean reporting matter. We get you there.

"Accountaire's CFO engagement carried us through our Series A. The model held up to investor due diligence without a scratch. We hired full-time afterwards. They handed everything over cleanly."
F
Founder & CEO · Series A SaaSSan Francisco & Lisbon

Common questions about CFO services.

Is this a real CFO, or a senior bookkeeper with a fancy title?
A real one. The engagement is led by the Managing Director, ACCA-qualified with twelve years across Big 4 audit and SME advisory. We don't put junior people on CFO work.
How is this different from hiring a fractional CFO directly?
A standalone fractional CFO doesn't have your books. They get information from your bookkeeper, which slows everything down. Our CFO knows your numbers because we close your books: no information gap, no ramp-up time, no missed deadlines because two providers couldn't coordinate.
Will you act as my CFO with investors or lenders?
Where you authorise it, we attend board meetings (in person or video), participate in due diligence calls and represent the finance function externally. We don't sign contracts on your behalf without express authority.
What if I already have a CFO and just want bookkeeping?
Then you don't need this service. The Professional or Enterprise tier without CFO advisory is the right fit. We partner with your CFO instead of replacing them.
How quickly can you ramp on a fundraise?
If you're already a client, immediately. We know your numbers. If you're engaging us specifically for a fundraise, expect a 4-week ramp before we're investor-ready. We don't recommend engaging two weeks before a term-sheet meeting.
Do you produce 3- or 5-year financial models?
Yes. Long-range models are part of fundraising preparation and strategic planning. We build them bottom-up with assumption transparency, so they survive investor scrutiny.
When should I hire a full-time CFO instead?
Generally when you're consistently above $20M ARR, planning a Series B+ or pre-IPO transaction, or when finance is a 30+ hour-per-week strategic load. We help you make the transition cleanly, including handing over models, contracts and relationships.
What does a monthly CFO retainer actually buy in hours?
A typical engagement is one hour of live strategy call, a weekly rebuild of the 13-week model, the board or investor pack, and ad-hoc availability during the month. We do not sell hours, because the value sits in the model being current rather than in time booked, but expect the equivalent of two to four working days a month on a Growth-sized business.
Often paired with

Related services.

REPORTING

Management accounts

The monthly pack underneath the CFO conversation.

Explore
CORE

Cloud bookkeeping

Live ledger, current to last week.

Explore
COMPLIANCE

Tax & VAT

Tax planning integrated into CFO work.

Explore
GUIDE

13-week cash flow template

How the model is built, line by line, and reviewed weekly.

Explore
GUIDE

When you need a CFO

The signals that say a fractional CFO is due, and the ones that do not.

Explore
SECTOR

Startup accounting

Cap table, EMI, R&D claims and investor reporting for funded founders.

Explore
Strategic finance

Need a CFO without the headcount?

Thirty minutes to discuss where your business is and whether CFO-as-a-Service is the right fit.