Tax Advisory · Audit · Consulting

Tax, audit and advisory – from a single source.

Passion Revision supports companies and private individuals personally: from tax returns and international tax matters to statutory audits and advice on reporting, transactions and growth – in Germany and Switzerland.

Nuremberg – tax advisory and audit in the metropolitan region
Image Nuremberg
Office NurembergPersonal service · in Germany and Switzerland
One point of contact
Personal – from first meeting to final sign-off
Big Four quality
Methodology from years at PwC
Nuremberg · Zurich
Licensed in Germany and Switzerland
Member of
IDW – Institute of Public Auditors in Germany
Chamber of Public Accountants (WPK)
EXPERTsuisse
SwissAccounting SwissAccounting
Services

Three disciplines. One view of your business.

Whether you are a company, an entrepreneur or a private individual: thinking about tax, figures and decisions together leads to better advice. I offer all three disciplines with the same diligence and a single point of contact.

How I work

What you can rely on

As a licensed professional, I am bound by confidentiality and independence and supervised by the German Chamber of Public Accountants (WPK) and the Swiss Federal Audit Oversight Authority (FAOA/RAB).

Personal

You work directly with me – not with changing teams. Short lines of communication, quick answers, clear responsibility.

Precise

Big Four methodology and quality standards – applied to the reality of mid-sized businesses.

Integrity

Transparent fees, independent judgement and a clear separation of audit and advisory wherever professional rules require it.

Two countries

At home in Germany and Switzerland

Licensed in both countries, I combine German and Swiss tax, audit and accounting law – for companies operating across the border as well as for cross-border commuters and individuals with ties to both countries.

Reichstag building, Berlin
Germany · Office Nuremberg

Tax advisory & audit

German Public Auditor (Wirtschaftsprüfer), member of the WPK and IDW. Tax advisory for companies and individuals as well as audits under German GAAP.

Audit in Switzerland
Switzerland · Office Zurich

Audit & accounting

Licensed audit expert (FAOA/RAB), member of EXPERTsuisse. Statutory audits under the Swiss Code of Obligations and reporting under Swiss GAAP FER.

Jonas Kisskalt, public auditor in Germany and Switzerland
About me

Jonas Kisskalt

First-class expertise for mid-sized businesses – without professional or geographical barriers.

After years in Big Four audit, I founded Passion Revision to offer businesses what I would expect as a client myself: technical depth, reliability and one point of contact who sees the whole picture.

As an auditor licensed in Germany and Switzerland, I combine tax advisory, audit and consulting – across borders.

WirtschaftsprüferGerman Public Auditor since 2025
Swiss Certified AccountantDipl. Wirtschaftsprüfer · Licensed audit expert (RAB)
PwC Zurich & St. GallenManager Assurance, 2021–2026
M.A. HSG · MScBA RSMSt. Gallen · Rotterdam · B.Sc. Mannheim
Insights

Articles

Perspectives on current questions in tax, accounting and audit in Germany and Switzerland.

FAQ

Frequently asked questions

Is a public auditor allowed to provide tax advice?

Yes. Under Section 3 of the German Tax Advisory Act (StBerG), Wirtschaftsprüfer are authorised to provide unrestricted assistance in tax matters – from tax returns to tax structuring.

Do you also advise private individuals and cross-border commuters?

Yes. I prepare income tax returns and advise private individuals – with particular experience in cross-border commuters between Germany and Switzerland and in income or assets in several countries.

Can you audit my company and provide tax advice at the same time?

In many cases yes – but professional independence rules set limits. I assess this upfront for every engagement and tell you openly which combination is possible.

What is the advantage of a boutique firm over a Big Four firm?

At Passion Revision you get the technical quality and methodological precision of a Big Four audit – with one dedicated, personal point of contact and short lines of communication.

Are you licensed as an auditor in Switzerland?

Yes. As a licensed audit expert, I am officially registered with the Swiss Federal Audit Oversight Authority (FAOA/RAB).

Do you work with tax advisors and fiduciaries?

Yes. Passion Revision is also a specialised partner for tax advisors and fiduciaries – for example for audits or cross-border questions. More on cooperation →

Let’s start your project.

A no-obligation initial consultation – in person, by phone or video.

Request a consultation
Contact

Let’s talk.

Email: info@passion-revision.de

Germany

Nuremberg

Entenseestraße 18
90607 Rückersdorf, Germany
+49 160 406 9353
Switzerland

Zurich

Strehlgasse 2
c/o ExpertFid & Audit AG
8001 Zurich, Switzerland
+41 79 867 5051