Your finance partner for start ups & scaling businesses

At Onsen Accounting, we specialise in building lean, intelligent finance functions for startups and high-growth businesses. Whether you’re preparing for investment, scaling operations, or simply need better visibility over your numbers, we embed experienced finance leaders into your team.

From day one, we design and deliver the tools, processes, and reporting structures your business needs to grow with confidence. We implement ERP systems, build robust FP&A models, and ensure your finance function runs smoothly - so you can focus on strategy, not spreadsheets.

Once your internal team is ready, we won’t disappear - we continue to provide outsourced accounting and FP&A reporting, keeping you informed with meaningful financial insights, every step of the way.

What We Do

• Interim Finance Leadership

• ERP Implementation & Process Design

• Forecasting, Budgeting, Treasury & Board Reporting

• Scalable Outsourced Accounting & FP&A Support