A part-time CFO gives your SaaS or tech business ongoing strategic financial leadership on a regular schedule — typically 1-3 days per week. It's the most common way growing companies access CFO-level thinking: enough time to be genuinely embedded in your business, without the cost of a full-time executive.
I work as a part-time CFO for SaaS, AI, and technology companies across London and the UK. The engagement is ongoing, not project-based. I become part of your team, attend your leadership meetings, and take ownership of the strategic finance agenda.
What Does a Part-Time CFO Do?
Everything a full-time CFO does — but focused on the highest-impact areas for your business stage. For SaaS companies between £1M and £20M ARR, this typically means:
Financial Planning & Budgeting
Building your annual budget, maintaining rolling forecasts, and creating the financial model that underpins your growth plan. I work with your leadership team to set financial targets, allocate resources, and track performance against plan. When the plan changes — and it always does — I reforecast quickly so you’re making decisions with current data.
Monthly Management Accounts
Not just a P&L. SaaS-native management accounts that include MRR analysis, cohort performance, unit economics, cash flow, and a clear narrative explaining what happened, why, and what to do about it. Delivered within 10 working days of month-end, every month.
Board & Investor Reporting
Designing and producing board packs that keep your investors informed and your board meetings productive. Clear financial summaries, KPI dashboards, risk flags, and strategic recommendations — presented in a format that gets read and drives good conversation.
Cash Flow & Working Capital
Weekly or monthly cash flow monitoring, rolling forecasts, and runway tracking. For SaaS businesses, this means understanding the timing difference between bookings, revenue recognition, and cash collection — and making sure you always know where you stand.
Fundraising Support
When it’s time to raise, I ramp up to support the process: building the data room, preparing financial projections, modelling valuation scenarios, and being the financial point of contact for investor due diligence. This is where having an ongoing CFO relationship pays off — I already know the business inside out.
Commercial Decision Support
Pricing analysis, hiring business cases, market expansion modelling, make-vs-buy decisions. As your part-time CFO, I’m the person you call before making any significant financial commitment, not after.
Part-Time CFO vs Fractional CFO: What’s the Difference?
Honestly, very little. The terms are used interchangeably in the market. Both refer to a senior finance professional who works with your business on a regular but non-full-time basis. Some people use “fractional” to mean a smaller time commitment (a few days per month) and “part-time” to mean a larger one (1-3 days per week), but there’s no industry-standard definition.
What matters isn’t the label — it’s the substance. The right question is: will this person genuinely embed in my business and take ownership of the finance strategy, or just review numbers at arm’s length? I do the former.
How Much Does a Part-Time CFO Cost?
Part-time CFO fees for SaaS companies typically range from £2,000-8,000 per month, depending on the number of days per week and the complexity of the business. Compare that to a full-time CFO at £120-180k salary plus equity, benefits, and employer costs — a part-time arrangement delivers 80% of the value at 20-30% of the total cost.
Most engagements start at 2 days per month for early-stage businesses and scale up to 2-3 days per week as the company grows and the financial demands increase. The arrangement flexes — more time during fundraising or year-end, less during quieter periods.
Who Is This Right For?
A part-time CFO works best for SaaS and tech companies that have passed the early startup stage and reached £1M+ in annual revenue, have outgrown their accountant or bookkeeper, are making decisions that need financial analysis behind them, want regular, ongoing financial leadership rather than project-based consulting, and are based in London or across the UK.
If you’re earlier stage and just need help getting your financial foundations right, a lighter-touch engagement might be more appropriate. If you’re preparing for a specific transaction (fundraise, exit, restructuring), an interim CFO engagement might be a better fit. Happy to discuss what makes sense for your situation.
Book a free discovery call to discuss part-time CFO services for your business.
