We ensure to our clients excellence through our service range. We are committed to delivering quality in advisory, tax and accounting for corporations as well as for private clients.


Continuing education and membership of tax organizations such as the Ordre romand des experts fiscaux (OREF), the Association suisse des experts fiscaux diplômés (ASEFID) and EXPERTSuisse enable us to follow trends and developments in tax & accounting matters.

We intend to advise our clients with conviction. We have a passion for our activity.


Our values are the pilars of our organization and lead our actions and our entrepreneurial spirit. They define who we are and how we work.

– Integrity

Integrity and honesty are our core values which ensure our success in all kind of activity and our credibility.

– Listening

We give high priority to listening. Responsive to customers’ wishes, we first analyse all aspects of their enterprise and their scope of business, then we target their needs before establishing a strategy.

– Innovation

We reject preconceived ideas. An analysis of the customer’s situation allows us to provide with taylor made solutions which are efficient and meet clients’ needs and expectations. We think out of the box, which allows us a permanent repositioning at the cutting edge of the profession.


– Tax

Taylor made solutions related to tax matters We help in defining the tax strategy for short and long term views, by taking into account new regulatory constraints by using pragmatic approaches. We offer our clients a multidisciplinary intervention capacity.

Corporate tax

  • Income tax
  • Capital tax
  • Tax compliance
  • Tax strategy
  • Exemption request – charitable organizations
  • Tax accrual review
  • Merger & acquisitions
  • Reorganization, recapitalization
  • Local establishments and tax relief
  • Incentive plan for employees and acquisition strategy
  • Support for tax audit
  • Appeal procedures

Personal and wealth tax

  • Income tax
  • Wealth tax
  • Voluntary disclosure
  • Pension tax planning
  • Appeal procedures
  • Company valuation
  • Inheritance
  • Self-employed activity
  • Lumpsum taxation
  • Artists, sportspeople, lecturers
  • Social security

We are also at disposal for temporary secondment of tax professionals during maternity leave or sabbatical leave.

– Accounting

Our clients benefit from a comprehensive and sustainable support. We offer a personalized bookkeeping service, saving time and money to our customers. Our action can range from ensuring the end-of-month book entries to a complete bookkeeping followed by the preparation of the financial statements. Depending on the needs, the accounts keeping support is taylor made according to the following characteristics:


  • Support : using recognized softwares such as Winbiz.
  • Place of service : on your premises or at our offices.
  • Frequency of services : weekly, monthly, quarterly, annualy.


– Corporate Consulting

We can advise our clients by helping at different levels in order to strengthen enterprise resiliency.


  • Organization, methods and tools
  • Risk mapping
  • Project risk management
  • Internal control program
  • Adequacy and effectiveness of controls



Sarra Perrin
CV (pdf)

Swiss certified tax expert
MScM HEC Lausanne
Individual member of EXPERTsuisse
Member of Ordre Romand des Experts Fiscaux

French, English, Italian


Founding partner of Perrin & Co LLC  Since 2017
International Tax Manager, Country tax manager for Switzerland and Italy
within Caterpillar Group in Geneva
Consultant, then Manager within the Corporate tax department of
Ernst & Young SA, Lausanne
Trainee in the Economic section, Administration
cantonale des impôts, Lausanne



Perrin & Co LLC
Rue de Bourg 1
P.O. Box 5795
CH-1002 Lausanne
T +41 21 555 77 00
F +41 21 555 77 10

Entrance by Rue Saint-François 15