mon3aan - Cloud Accountancy | Advice | Tax Matters


Mon3aan works with you and helps you determine your business strategy. We are the co-pilot of your business focusing on your goals and needs .


After a thorough analysis, we automate your books and administration so that you can consult everything digitally and even view real-time management reports. As an Exact Online partner, we know the ins and outs of cloud accountancy. Digitalize, automate and make the right decisions.



We create reports tailored to your needs and test them against your proposed budgets and strategy. We also make the figures comprehensible and advise you on tax matters such as the tax shelter, deduction of patents and the rules for company cars.


Corporate & finance

Mon3aan also focuses on supporting mergers and acquisitions. We bring entrepreneurs and investors together and facilitate the process from start to finish, with our own legal department playing an important role. Management buyouts and ‘smart deals’ are also familiar terrain for us.


About us

Mon3aan combines innovative technology and personal advice to make your administration paperless, so you have more time for every single client. Mon3aan’s digital platform extends far beyond accounting alone.
Mon3aan offers you a solution that takes away the stress of tax issues and administration, thanks to an integrated digital platform in partnership with Exact Online.
Feel free to stop by for a personal conversation with your future accountant.

At Mon3aan, we commit 100% to digitalization and automation. We really believe there’s a faster and more efficient way to do things! That’s why Mon3aan has implemented secure digital signatures for documents.

“Mon3aan advised and supported the migration of our analog quote-to-cash principle to a fully digitally integrated process with Teamleader and Exact Online. This was done successfully in a very short time.”

– Jan Vanpraet, NXT Concept – IMPLS


Mon3aan is so much more than just an accountant. We help entrepreneurs think matters through and search for the right opportunities for growth, while also offering advice and support with reorganizations and playing a pioneering role in digitalization.
We take our task as copilot very seriously. And you don’t have to take our word for it: here’s a selection of some of our clients.


Based on 8 reviews
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epiphany Vanderhaeghenepiphany Vanderhaeghen
12:11 13 Mar 23
I have now switched from my previous accountant and am very satisfied with that decision. The Mondriaan team are my partners in important decisions and always think creatively. I have already referred many friends and will continue to do so.
Lucas BauwensLucas Bauwens
09:31 02 Mar 23
I have been working with Mondriaan for a few months now on the start-up of my company, and have received support from A to Z for contracts, banking, tax know-how, accounting and countless other matters. Price-quality at its best, definitely recommended for reliable service.
Olivier Van de VijverOlivier Van de Vijver
08:43 24 Feb 23
Mondriaan has been guiding me for 8 years in the growth of my company and always gives top advice! For me, these are not accountants, but top advisors!
Lien DepootLien Depoot
06:30 22 Feb 23
Received tax advice from Mon3aan when purchasing investment real estate. Top service. Excellent expertise!
Philippe QuatennensPhilippe Quatennens
14:12 26 Jul 22
Mon3aan is like my financial father who wants the best for us…
Roberto De BokxRoberto De Bokx
20:20 31 Jan 22
Highly skilled accounting firm: fully digital; get rid of the paper! Mr van Gysegem is the right person to get a complex file back on track. I thank him for the advice we have already received!


Client surveys have shown that almost 58% of our clients actively recommend Mon3aan to their colleagues. That gives us a Net Promotor Score of 49.30 (with 20 or more being considered a good score). That’s a magnificent result and an important indicator of our clients’ loyalty over the years.

When you work with Mon3aan, we make all the difference

Simplifying life & removing stress

Advice & cost-cutting

Personal contact

Sustainable business

Mon3aan, Exact Online & Silverfin: the perfect match.

Efficiency and digitalization are the key to our partnerships with Exact Online and Silverfin. Exact Online is the ideal digital platform for all your administrative needs. Combine the power of this all-in-one accountancy package, which includes CRM, project management, staff management, purchasing and sales with our in-depth advice. Silverfin enables us to offer real-time reporting, customized to fulfil your business needs.

Your question for Mon3aan

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