Onside Accounting

About Onside Accounting

Onside are Chartered Certified Accountants, Business Advisers and Tax Specialists supporting technology startups and high-growth businesses.  We are a high-touch finance partner that specialises in supporting VC-backed tech startups from pre-seed to Series C. Providing the feel of having a finance co-founder, we are purpose-built for speed, agility and growth. Our clients have daily access to a three-person finance team led by Chartered Accountants, with on-demand access available to a broader range of specialist tax advisors, technical partners, venture growth experts and fractional CFO/FP&A resource. We are your integrated partner for day-to-day finance, statutory accounts and tax advisory, capable of meeting all of your accounting and finance needs in one place. Founded in 2021, we have grown to a team of almost 40 passionate people, all working flexibly from home across the UK from London to Leeds, Glasgow to Aberystwyth and Belfast to Brighton. The vast majority of our 170+ UK limited company clients have been referred to us by existing clients. Their advocacy on our behalf resulted in us winning the Client Service Award (Medium and Large Firms) at the Accounting Excellence Awards in London in September 2025, following on from our winning the New Firm of the Year Award in 2024.