Onside Accounting and Onside Tax donate a share of profit to charities chosen by their employees
Onside Accounting

Finance for VC-backed Technology Startups and Scale-ups

We work with ambitious, venture-backed tech founders who set high standards for their business and their partners.

From pre-seed through to Series C, we build long-term finance partnerships that evolve as your business grows. We provide accounting, tax and advisory services with the feel of a finance co-founder, so finance becomes a competitive advantage rather than a distraction.

Our “one tool per function” approach ensures system simplicity, operational efficiency and minimal training complexity. We work exclusively with Xero, our chosen accountancy system provider. Having this focus enables us to get the very best out of Xero and the various apps available in Xero's ecosystem.

Not on Xero? Don't worry, we can transfer your records onto Xero.
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Who We Work Best With

We work best with founders who:
are building VC-backed tech businesses
want a finance partner, not just outsourced accounting and compliance
value speed, accuracy and proactive advice
see finance as strategic, not just compliance
We work with ambitious founders who expect their finance partner to operate at the same level. Many of our relationships begin at pre-seed and grow alongside the company.

Proven by Experience, Trusted by Founders

We work with clients who value a high level of service and expect clarity, accuracy and sound judgement.

Founded in 2021, we’ve grown to a team of 50 passionate people supporting around 200 businesses.

The vast majority of our clients come to us through referrals from existing clients, which reflects the long-term partnerships we build with founders and finance leaders.

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See What Our Clients Say

Don’t just take our word for it - our clients’ experiences speak for themselves. We’re proud to support businesses with clear, reliable accounting and a genuinely personal approach, but it’s their feedback that really shows the difference we make. Take a look at what they have to say about working with us.
Testimonials
Onside Accounting is a trading name of Onside Accounting Limited which is registered in England & Wales under Company Registration No. 13428300