Auditing
with a Business Perspective
As auditors, we operate in various roles for our clients. In addition to the core financial statement audit, we see ourselves as business advisors, appraisers, moderators between companies and shareholders, or the management’s „second opinion.“ With expertise and foresight, we create trust, transparency, and operational added value.
Sustainable Value Creation through Solution-Oriented Auditing and Consulting
Our auditing services offer more than just compliance with legal requirements—we create clarity and security for your business decisions with our comprehensive expertise. For this reason, we have been able to support our clients from medium-sized family businesses, corporations, financial investors, family offices, and foundations in both auditing and advisory roles for years and decades. From annual financial statement audits, group audits, and special audits to business valuations and accounting-related consulting, we accompany you every step of the way. Thanks to our expertise in complex auditing and consulting matters, we combine precise analyses with forward-looking recommendations that sustainably secure your success.
»Trust in our expertise and neutrality – we stand by your side as a sparring partner in all business matters, both in successful and challenging times.«
JAKOB EISENREICH
Partner
Your Special Advantage through Our „One-Stop-Shop Setup“:
As a multidisciplinary consulting firm, you benefit from a broad range of services within our Audit Service Line, including accounting, tax, legal, business, and IT, combined with our entrepreneurial know-how. However, in auditing, independence and neutrality are our top priorities. Our auditors operate completely independently from other consulting teams—ensuring that all legal and professional standards are always met. With this clear separation, we guarantee an objective audit and trustworthy results. We leverage the latest technologies in relation to your accounting and our audit procedures.
Our annual financial statement audits provide you with reliable transparency and security—from legal requirements and voluntary audits to specialized group and special audits. These include:
- Statutory annual financial statement audits
- Voluntary annual financial statement audits
- Group audits
- Other special audits related to financial reporting
- ESG reporting audits
»Jakob Eisenreich and the REDONIS team have been long-term partners of group.one. As an internationally growing company with over 500 employees and double-digit annual growth, we rely on a partner who reliably advises us during this expansion and helps us establish the necessary organizational and regulatory structures.«
Daniel Hagemeier
Group CEO group.one und CEO dogado GmbH
»LeasingMarkt.de is Germany’s largest marketplace for automobile leasing. From the early days of its founding to today, Jakob Eisenreich and the REDONIS team have supported us in building LeasingMarkt.de.«
Robin Tschöpe

Industries that particularly trust us
REDONIS is there for companies and entrepreneurs in all sectors. We have gained a great deal of experience and trust in the healthcare, industrial and technology, hotel and catering and retail sectors.
Your one-stop shop for tax, legal and business advice
REDONIS offers you tax advice, legal advice, management consulting and M&A advice from a single source – a range of services that is otherwise only available from large law and tax firms.
We have designed the consulting portfolio specifically for medium-sized companies and family businesses. The law and tax firm has a particular focus on the healthcare, industry and technology, hotel and catering, and trade sectors.
Check Out Our Services – We Would Be Delighted
Let us evaluate how we can help you move forward – neutrally, independently, and with a clear focus on your challenges. Choose one of our many contact options, and we are ready for you immediately!