Tax is going digital. Your bookkeeping should too.

For UK sole traders and freelancers who want simple bookkeeping, clear numbers, and stress-free self assessment.

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Need to submit your self assessment? We’ll do it for you, fast & stress-free.
Yes, please!
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Flexible, Affordable Pricing Plans

From Bookkeeping to CFO services, find all your business essentials in one place.
All pricing plans are billed monthly, with no long term commitment.

Our Additional Services

SEIS/EIS Applications

Enhance your investability with Addition. We streamline your application, ensuring it adheres to the latest HMRC guidelines for reliable approval.
Learn More

Company Valuation

Discover how much your company is truly worth. Gain actionable insights to make informed decisions, attract investors and drive growth with confidence.
Learn More

Employee Stock Options

Get the most out of stock benefits hassle-free! Our team helps you keep track, follow the rules, and make sure your employees get the most out of their options.
Learn More

Trusted by the best

John
Five star review
Addition are my 'on tap' bookkeepers and financial advisors. I have saved so much time and money switching my basic bookkeeping to them, and I have also utilised them for an R&D claim at half the price of others on the market.
Adam
Five star review
They really are so incredible - they help us with all of our requirements from payroll to forecasting to budget creation to all end of month and end of year reporting and even R&D tax. Absolute lifesaver for our company and the team is second to none !
Michael
Five star review
Addition have been great in supporting our growth since opening, and now helping build our development plans. It would have been a much more difficult journey without them!
Laura
Five star review
I've been with Addition for quite a while now and never had a negative experience. They are excellent at keeping up to date with any accounting requirements and the software solution makes it very easy to manage.
Sarah
Five star review
I cannot express enough how amazing Addition's services are. From the moment I reached out to the team, I knew I was in good hands. The customer service was outstanding, and the entire process was incredibly smooth.
John
Five star review
Addition are my 'on tap' bookkeepers and financial advisors. I have saved so much time and money switching my basic bookkeeping to them, and I have also utilised them for an R&D claim at half the price of others on the market.
Adam
Five star review
They really are so incredible - they help us with all of our requirements from payroll to forecasting to budget creation to all end of month and end of year reporting and even R&D tax. Absolute lifesaver for our company and the team is second to none !
Michael
Five star review
Addition have been great in supporting our growth since opening, and now helping build our development plans. It would have been a much more difficult journey without them!
Laura
Five star review
I've been with Addition for quite a while now and never had a negative experience. They are excellent at keeping up to date with any accounting requirements and the software solution makes it very easy to manage.
Sarah
Five star review
I cannot express enough how amazing Addition's services are. From the moment I reached out to the team, I knew I was in good hands. The customer service was outstanding, and the entire process was incredibly smooth.
VIEW FULL CASE STUDY

"Addition’s ability to scale with us from day one has been invaluable. Their understanding of the pressures on startups sets them apart."

Henry Harrod
CEO of Fourier Audio
VIEW FULL CASE STUDY

"Their all-in-one approach, from personal to corporate finances, has been a game-changer. Addition has been instrumental in our success."

Founder & CEO at Plutio
VIEW FULL CASE STUDY

“Their systems are great – drag-and-drop transactions save so much time! Addition has truly transformed ‍how we manage our finances.”

Akil Memishi
Founder of Novomins Nutrition
VIEW FULL CASE STUDY

“Having their systems in place before our significant growth has been invaluable. It has taken so much work off of my plate.”

Calum Hutchison
Co-Founder & CEO of Leaf
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