Fractional CFO for VC-Backed and Scaling UK Startups

Fractional CFO and management accounts for VC-backed startups.

Early-stage funded companies need CFO-level financial oversight before they can justify a full-time finance hire. A fractional CFO is not a bookkeeper and not just a statutory accountant: the deliverable is board-ready financial reporting, burn and runway modelling built on real cost assumptions, investor-facing financial narrative, and the SaaS metric tracking (MRR, ARR, gross margin, cohort retention) that a board and lead investor expect to see monthly. The work is distinct from generic SME management accounts, and the audience is distinct: VC-backed and scaling, not a high-street business. For a funded startup, the finance function must also connect to the tax-relief work: the <a href="https://www.gov.uk/guidance/corporation-tax-research-and-development-tax-relief-for-large-companies">20% R&D expenditure credit</a> belongs in the cash-flow and runway model, the <a href="https://www.gov.uk/tax-employee-share-schemes/enterprise-management-incentives-emis">£250,000 per-employee and £3m company EMI headroom</a> is a headcount-planning input, and <a href="https://www.gov.uk/register-for-vat">VAT registration at £90,000 rolling turnover</a> is a milestone the ARR curve will hit. We join those dots in one finance function rather than treating them as separate engagements.

The challenges clients face.

No board-ready reporting: founders walking into meetings without a clean pack

Monthly management accounts for investor consumption are a different product from annual statutory accounts. They need consistent KPI tracking, a clear narrative on variance against plan, a rolling cash runway view, and the level of detail that allows a non-executive director to ask an informed question. Producing this every month requires a financial process that most early-stage companies do not have in place, and founders running the business as well as managing the board are not well-placed to build it alone.

Not knowing true burn and runway, so a raise is left too late

Runway calculations based on average monthly burn are less useful than models built on the actual cost structure, the timing of planned hires, and realistic revenue projections. The difference between a 12-month and an 18-month runway matters enormously when planning the timing of a fundraise. A company that discovers its actual runway is shorter than expected has already lost optionality in the process. Scenario modelling that includes a conservative case and a downside, not just a central plan, is what a board and lead investor expect.

R&D, EMI and SEIS/EIS decisions made without the finance model

The cash timing of an <a href="https://www.gov.uk/guidance/corporation-tax-research-and-development-tax-relief-for-large-companies">R&D credit</a> affects runway materially for a loss-making company. The <a href="https://www.gov.uk/tax-employee-share-schemes/enterprise-management-incentives-emis">EMI pool size and option-grant timing</a> affect headcount capacity. The SEIS/EIS fundraise readiness check affects the timing of the next raise. Making those decisions without the finance model means cash timing surprises and option pool errors that are expensive to fix after the fact.

Scaling ARR past the VAT registration point without planning

VAT registration is mandatory once rolling 12-month UK taxable turnover reaches <a href="https://www.gov.uk/register-for-vat">£90,000</a>. For a SaaS company, the point at which the threshold is crossed is often in the ARR curve and may arrive faster than expected. The registration requirement changes the pricing model (VAT on B2C sales), the invoicing system, and the returns obligation. Planning for it 3 to 6 months ahead rather than discovering it retrospectively keeps it manageable.

How we help.

Monthly board pack, management accounts and investor reporting

We prepare monthly management accounts with the KPIs and narrative relevant to your investor base: MRR and ARR movement, gross margin, headcount and burn by department, cash runway, and variance against plan. The board pack financial sections are prepared to the standard a lead investor expects. We work with your bookkeeper or finance administrator to ensure the underlying data is clean and the numbers are consistent month on month.

Burn, runway and SaaS-metric modelling

We build a financial model on your actual cost structure and revenue assumptions, run scenario analysis including conservative and downside cases, and maintain it as the business evolves. The model tracks MRR and ARR, gross margin, cohort retention, and the cash impact of planned hires and one-off spend. It also incorporates the <a href="https://www.gov.uk/guidance/corporation-tax-research-and-development-tax-relief-for-large-companies">R&D credit cash timing</a> and the <a href="https://www.gov.uk/register-for-vat">VAT registration milestone</a> so the runway view is complete.

Joining the tax work to the finance function

We fold the specialist tax work into the financial model rather than treating it as a separate engagement. The <a href="/services/rd-tax-claims">R&D claim</a> cash impact lands in the runway model. The <a href="/services/emi-scheme-setup">EMI pool</a> feeds headcount planning. The <a href="/services/seis-eis-advance-assurance">SEIS/EIS raise readiness</a> check connects to the fundraise calendar. For founder extraction, the <a href="/calculators/founder-dividend-vs-salary-calculator">dividend versus salary split</a> is modelled against the company's profit position and the 2026/27 rates. One finance function covers all of these rather than multiple disconnected advisers.

Common questions

What does a fractional CFO do that our bookkeeper does not?

A bookkeeper records transactions and keeps the ledger clean. A fractional CFO uses the underlying data to produce board-ready reporting, run scenario analysis on burn and runway, support investor conversations, and connect the finance picture to the operational and fundraising decisions the founder is making. The two roles are complementary: we typically work alongside a bookkeeper or finance administrator rather than replacing them.

What is in a monthly board pack?

A typical board pack for a VC-backed startup includes monthly and cumulative revenue (MRR and ARR where relevant), gross margin, operating expenses by department, net cash burn, cash balance and runway projection, headcount, key operational KPIs, and a variance commentary against the board-approved plan. It is not a set of statutory accounts: it is a live management view designed for a board that includes investors who want to track performance against what was promised at the last fundraise.

How do you work out burn and runway?

Burn is the monthly net cash outflow: operating expenses less any revenue received in cash in the month. Runway is the number of months of cash remaining at the current or projected burn rate. A useful runway model separates fixed and variable costs, includes the timing of planned hires and one-off spend, models a range of revenue scenarios, and incorporates known cash inflows such as an <a href="https://www.gov.uk/guidance/corporation-tax-research-and-development-tax-relief-for-large-companies">R&D credit</a>. The central-case figure is less useful than understanding the range.

Can you also handle our R&D claim and EMI scheme?

Yes. We run the <a href="/services/rd-tax-claims">R&D claim</a>, set up and maintain the <a href="/services/emi-scheme-setup">EMI scheme</a>, handle <a href="/services/seis-eis-advance-assurance">SEIS and EIS advance assurance</a>, and manage the <a href="/services/core-compliance">core compliance stack</a> in one engagement. The advantage of covering all of this together is that the <a href="https://www.gov.uk/guidance/corporation-tax-research-and-development-tax-relief-for-large-companies">R&D credit</a> timing lands correctly in the model, the <a href="https://www.gov.uk/tax-employee-share-schemes/enterprise-management-incentives-emis">EMI pool and headroom</a> are tracked alongside headcount, and nothing falls through the gap between advisers.