Onside Accounting Recognised for Outstanding Client Service at the 2025 Accounting Excellence Awards

We are delighted to share the exciting news from the Accounting Excellence Awards 2025, held at the iconic Roundhouse in London on 30 September 2025.

It was a night to remember

Over 650 professionals from across the UK accounting industry came together to celebrate innovation, client service and excellence. For Onside, simply being shortlisted in three prestigious categories already felt like a huge achievement, especially after winning the New Firm of the Year Award just last year!

• Mid-Tier Firm of the Year
• Client Service Award (Medium & Large Firms)
• Tax Team of the Year (Mid/Large)

And the winners are…

We are absolutely thrilled to announce that Onside proudly took home not one, but two awards on the night:

Client Service Award (Medium & Large Firms) – Winner

This award means the world to us, because it reflects the trust, feedback, and support from our amazing clients. The recognition was supported by many of our client testimonials, making it a true testament to the relationships we have built with our clients and the dedication of our team.

Mid-Tier Firm of the Year – Silver

Following our Newcomer Award win last year, we are incredibly proud to be recognised as one of the very best mid-tier firms in the country.

While our Onside Tax team didn’t take home the trophy this time, being shortlisted for Tax Team of the Year (Mid/Large) was a huge honour in itself – and a wonderful chance for the team to get together to celebrate their expertise and hard work.

Why this win matters

2024 was a landmark year for Onside – we doubled in size and are on track for over 50% growth again in 2025. Maintaining exceptional client service during such rapid growth is no small feat, and this award is a highlight for many within the team.

Martin Brennan, Founder & CEO reflects:

“This award means the world to us. It’s nothing short of outstanding from our team, who continue to drive the business forward while never losing sight of what matters most – our clients. We are thankful for your trust, your support and your incredible testimonials that made this win possible.”

Thank you

We couldn’t have achieved this without:

• Our clients – for placing your trust in us, sharing your feedback and being such inspiring partners on this journey
• Our team – for your passion, dedication and drive to deliver excellence
• The Accounting Excellence Awards and The Roundhouse – for once again hosting such a brilliant celebration of our industry

Looking ahead

This recognition is a proud milestone in our four-year journey, but it’s only the beginning. At Onside Accounting and Onside Tax, we’re excited to continue growing, innovating and supporting our clients with the same passion and commitment that earned us these awards.

Here’s to another fantastic year ahead – and to always putting client service at the heart of everything we do.

Thank you Accounting Web for following up with this wonderful editorial.