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Strategic financial leadership for investor-backed SaaS and AI businesses
I help founders from £0.3M to £10M ARR build the financial infrastructure that turns fragmented data into board-ready reporting, strategic forecasts, and confident scaling decisions.
Book a 30-Minute Intro Call
Meet Kirsten,
Your SaaS Finance Partner
I’m Kirsten, Founder of SaaS Scaler. ICAEW Chartered Accountant and US CPA with 20 years’ experience across the UK, US, and Japan - including Big 4 training (Deloitte, KPMG, EY) and senior finance roles in PE and VC-backed SaaS scale-ups.
I apply a structured framework that starts with the foundations - cleaning up reporting, building a SaaS P&L, implementing the right systems - then moves to growth: 5-year forecasts, cohort analysis to identify your ideal customer profile, KPI dashboards aligned to OKRs, and the international tax expertise to scale across borders.
I embed myself in clients’ businesses to identify the real revenue, profit, and cash drivers, then build clean systems that turn data into strategic advantage.
Our Complimentary Business Assessment
1
30-Minute Intro Call
We’ll talk through where your business is today and what’s holding your finance function back. No prep needed.
2
Comprehensive Busines Review
I dig into your financial data, systems, and reporting to understand your current position and identify the biggest opportunities.
3
30/60/90-Day Plan
You’ll receive a tailored roadmap showing exactly where I’ll add value, with clear milestones and expected outcomes.
Tailored Solutions For Every Growth Stage
We provide a comprehensive finance and accounting function perfectly matched to your place on the scale-up journey:
Foundations
From £1,500 per month
For businesses with £300k+ ARR and fewer than 5 employees.
Get clarity on what’s actually driving your unit economics with:
  • Streamlined month-end close
  • SaaS metrics and KPI reporting
  • Board reporting
Growth
From £2,500 per month
For businesses with £1m+ ARR and 5-20 employees.
Build the reporting and forecasts that give investors confidence with:
  • Everything in Foundations, plus:
  • Monthly fractional CFO support
  • 5-year forecasts and cash flow modelling
  • Budget and KPI alignment to OKRs
  • Fundraising support
Growth at Scale
From £4,000 per month
For businesses with £5m+ ARR and 20+ employees.
Create the financial infrastructure for international growth and exit readiness with:
  • Everything in Growth plus:
  • Process automation and system implementation
  • M&A integration
  • International expansion
  • Exit strategy planning
The SaaS Scaler Approach
1
Foundations
Establishing clean reporting, a SaaS P&L structure, and the right systems to give you reliable data you can trust.
2
Growth
Building 5-year forecasts, cohort analysis, KPI dashboards, and the international compliance infrastructure to scale with confidence.
3
Leadership
Board-ready reporting and presentations, strategic decision support, and ongoing partnership as your business scales.
Ready to get clarity on your numbers?

If your finance function isn’t giving you the clarity you need to make confident decisions, let’s talk. Book a 30-minute intro call and I’ll tell you honestly whether I can help.
SaaS Scaler Limited is a Limited Company registered in England and Wales. Company Number: 16087861. Director: Kirsten Munn, ACA, CPA
Registered Office: 7A Dunraven Road, West Kirby, Wirral, CH48 4DR, United Kingdom
SaaS Scaler Limited is a firm of Chartered Accountants and is regulated by the Institute of Chartered Accountants in England and Wales (ICAEW).