Job title: Finance Business Partner – Product / B2B SaaS
Job type: Contract - Daily rate
Emp type: Full-time
Industry: Non-IT Business Products and Services
Pay interval: Daily
Pay rate from: GBP £600.00
Pay rate to: GBP £700.00
Job published: 01-09-2026
Job ID: 56040

Job Description

Finance Business Partner – Product / B2B SaaS
3 Month Contract

Rate: £600 - £700 per day (Inside IR35)
Location: London – onsite 2/3 days per week

We’re looking for an experienced Finance Business Partner to join a large, complex organisation and partner closely with senior leaders across its Product and B2B SaaS functions.

This is a commercially focused role supporting teams responsible for developing, scaling and commercialising software products and digital services. You’ll provide financial insight, challenge and decision support across product performance, investment, revenue growth, planning and prioritisation.

The ideal candidate will have previous experience partnering B2B SaaS, Software or Product-led teams, rather than purely supporting internal Technology or IT functions.

Key responsibilities

  • Partner with senior Product, SaaS and commercial leaders, providing financial insight, challenge and decision support
  • Support budgeting, forecasting and rolling planning across product-led business areas
  • Analyse product performance, revenue, cost base, investment and profitability
  • Support decision-making around product investment, roadmap prioritisation and resource allocation
  • Build and review financial models, business cases and scenario analysis
  • Provide insight into key commercial drivers across B2B SaaS products and services
  • Support revenue forecasting and performance analysis across customer and product segments
  • Track investment, costs, benefits, risks and returns across product initiatives
  • Own and improve monthly financial and management reporting
  • Identify trends, risks and opportunities across product performance and commercial outcomes
  • Challenge assumptions around growth, investment, pricing, headcount and return on investment
  • Translate complex financial and operational data into clear recommendations for senior stakeholders

Skills and experience

  • Qualified accountant – ACA, ACCA, CIMA or equivalent
  • Strong Finance Business Partnering / Commercial Finance experience
  • Previous experience partnering B2B SaaS, Software or Product functions
  • Strong understanding of commercial drivers within a product-led or subscription-based business
  • Experience supporting revenue forecasting, product profitability and investment decisions
  • Strong budgeting, forecasting and management reporting experience
  • Excellent financial modelling and Excel skills
  • Proven experience influencing senior Product and non-finance stakeholders
  • Experience working within a large, complex organisation
  • Strong commercial judgement and analytical capability
  • Comfortable working in a fast-paced, matrix environment with multiple senior stakeholders